Added cli for general usage of Vikunja (#66)
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continuous-integration/drone/push Build is passing
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This commit is contained in:
Gitea
parent
5525ee0328
commit
8d78e473f5
2
Makefile
2
Makefile
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@ -19,7 +19,7 @@ GOFMT ?= gofmt -s
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GOFLAGS := -v -mod=vendor
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EXTRA_GOFLAGS ?=
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LDFLAGS := -X "main.Version=$(shell git describe --tags --always --abbrev=10 | sed 's/-/+/' | sed 's/^v//' | sed 's/-g/-/')" -X "main.Tags=$(TAGS)"
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LDFLAGS := -X "code.vikunja.io/api/pkg/cmd.Version=$(shell git describe --tags --always --abbrev=10 | sed 's/-/+/' | sed 's/^v//' | sed 's/-g/-/')" -X "main.Tags=$(TAGS)"
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PACKAGES ?= $(filter-out code.vikunja.io/api/integrations,$(shell go list -mod=vendor ./... | grep -v /vendor/))
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SOURCES ?= $(shell find . -name "*.go" -type f)
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3
go.mod
3
go.mod
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@ -38,6 +38,7 @@ require (
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github.com/go-xorm/xorm-redis-cache v0.0.0-20180727005610-859b313566b2
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github.com/gordonklaus/ineffassign v0.0.0-20180909121442-1003c8bd00dc
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github.com/imdario/mergo v0.3.6
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github.com/inconshreveable/mousetrap v1.0.0 // indirect
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github.com/jgautheron/goconst v0.0.0-20170703170152-9740945f5dcb
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github.com/karalabe/xgo v0.0.0-20181007145344-72da7d1d3970
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github.com/kisielk/gotool v1.0.0 // indirect
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@ -48,12 +49,14 @@ require (
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github.com/mattn/go-isatty v0.0.7 // indirect
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github.com/mattn/go-oci8 v0.0.0-20181130072307-052f5d97b9b6 // indirect
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github.com/mattn/go-sqlite3 v1.10.0
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github.com/mitchellh/go-homedir v1.1.0 // indirect
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github.com/mitchellh/mapstructure v1.1.2 // indirect
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github.com/onsi/ginkgo v1.7.0 // indirect
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github.com/onsi/gomega v1.4.3 // indirect
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github.com/op/go-logging v0.0.0-20160315200505-970db520ece7
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github.com/pkg/errors v0.8.0 // indirect
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github.com/prometheus/client_golang v0.9.2
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github.com/spf13/cobra v0.0.3
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github.com/spf13/viper v1.2.0
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github.com/stretchr/objx v0.1.1 // indirect
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github.com/stretchr/testify v1.3.0
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6
go.sum
6
go.sum
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@ -78,6 +78,8 @@ github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
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github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
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github.com/imdario/mergo v0.3.6 h1:xTNEAn+kxVO7dTZGu0CegyqKZmoWFI0rF8UxjlB2d28=
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github.com/imdario/mergo v0.3.6/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
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github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
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github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
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github.com/jgautheron/goconst v0.0.0-20170703170152-9740945f5dcb h1:D5s1HIu80AcMGcqmk7fNIVptmAubVHHaj3v5Upex6Zs=
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github.com/jgautheron/goconst v0.0.0-20170703170152-9740945f5dcb/go.mod h1:82TxjOpWQiPmywlbIaB2ZkqJoSYJdLGPgAJDvM3PbKc=
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github.com/joho/godotenv v1.3.0 h1:Zjp+RcGpHhGlrMbJzXTrZZPrWj+1vfm90La1wgB6Bhc=
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@ -119,6 +121,8 @@ github.com/mattn/go-sqlite3 v1.10.0 h1:jbhqpg7tQe4SupckyijYiy0mJJ/pRyHvXf7JdWK86
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github.com/mattn/go-sqlite3 v1.10.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
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github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0jegS5sx/RkqARlsWZ6pIwiU=
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github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
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github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
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github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
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github.com/mitchellh/mapstructure v1.0.0 h1:vVpGvMXJPqSDh2VYHF7gsfQj8Ncx+Xw5Y1KHeTRY+7I=
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github.com/mitchellh/mapstructure v1.0.0/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
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github.com/mitchellh/mapstructure v1.1.2 h1:fmNYVwqnSfB9mZU6OS2O6GsXM+wcskZDuKQzvN1EDeE=
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@ -148,6 +152,8 @@ github.com/spf13/afero v1.1.2 h1:m8/z1t7/fwjysjQRYbP0RD+bUIF/8tJwPdEZsI83ACI=
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github.com/spf13/afero v1.1.2/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
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github.com/spf13/cast v1.2.0 h1:HHl1DSRbEQN2i8tJmtS6ViPyHx35+p51amrdsiTCrkg=
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github.com/spf13/cast v1.2.0/go.mod h1:r2rcYCSwa1IExKTDiTfzaxqT2FNHs8hODu4LnUfgKEg=
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github.com/spf13/cobra v0.0.3 h1:ZlrZ4XsMRm04Fr5pSFxBgfND2EBVa1nLpiy1stUsX/8=
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github.com/spf13/cobra v0.0.3/go.mod h1:1l0Ry5zgKvJasoi3XT1TypsSe7PqH0Sj9dhYf7v3XqQ=
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github.com/spf13/jwalterweatherman v1.0.0 h1:XHEdyB+EcvlqZamSM4ZOMGlc93t6AcsBEu9Gc1vn7yk=
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github.com/spf13/jwalterweatherman v1.0.0/go.mod h1:cQK4TGJAtQXfYWX+Ddv3mKDzgVb68N+wFjFa4jdeBTo=
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github.com/spf13/pflag v1.0.2 h1:Fy0orTDgHdbnzHcsOgfCN4LtHf0ec3wwtiwJqwvf3Gc=
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58
main.go
58
main.go
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@ -16,62 +16,8 @@
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package main
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import (
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_ "code.vikunja.io/api/pkg/config" // To trigger its init() which initializes the config
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"code.vikunja.io/api/pkg/log"
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"code.vikunja.io/api/pkg/mail"
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"code.vikunja.io/api/pkg/models"
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"code.vikunja.io/api/pkg/routes"
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"code.vikunja.io/api/pkg/swagger"
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"context"
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"github.com/spf13/viper"
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"os"
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"os/signal"
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"time"
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)
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// Version sets the version to be printed to the user. Gets overwritten by "make release" or "make build" with last git commit or tag.
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var Version = "0.1"
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import "code.vikunja.io/api/pkg/cmd"
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func main() {
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// Set logger
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log.InitLogger()
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// Set Engine
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err := models.SetEngine()
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if err != nil {
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log.Log.Fatal(err.Error())
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}
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// Start the mail daemon
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mail.StartMailDaemon()
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// Version notification
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log.Log.Infof("Vikunja version %s", Version)
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// Additional swagger information
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swagger.SwaggerInfo.Version = Version
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// Start the webserver
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e := routes.NewEcho()
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routes.RegisterRoutes(e)
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// Start server
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go func() {
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if err := e.Start(viper.GetString("service.interface")); err != nil {
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e.Logger.Info("shutting down...")
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}
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}()
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// Wait for interrupt signal to gracefully shutdown the server with
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// a timeout of 10 seconds.
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quit := make(chan os.Signal, 1)
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signal.Notify(quit, os.Interrupt)
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<-quit
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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log.Log.Infof("Shutting down...")
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if err := e.Shutdown(ctx); err != nil {
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e.Logger.Fatal(err)
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}
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cmd.Execute()
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}
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@ -0,0 +1,54 @@
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// Vikunja is a todo-list application to facilitate your life.
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// Copyright 2019 Vikunja and contributors. All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package cmd
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import (
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"code.vikunja.io/api/pkg/config"
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"fmt"
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"github.com/spf13/cobra"
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"os"
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)
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// Version sets the version to be printed to the user. Gets overwritten by "make release" or "make build" with last git commit or tag.
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var Version = "0.1"
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func init() {
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cobra.OnInitialize(config.InitConfig)
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}
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var rootCmd = &cobra.Command{
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Use: "vikunja",
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Short: "Vikunja is the to-do app to organize your life.",
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Long: `Vikunja (/vɪˈkuːnjə/)
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The to-do app to organize your life.
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Also one of the two wild South American camelids which live in the high
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alpine areas of the Andes and a relative of the llama.
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Vikunja is a self-hosted To-Do list application with a web app and mobile apps for all platforms. It is licensed under the GPLv3.
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Find more info at vikunja.io.`,
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Run: webCmd.Run,
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}
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// Execute starts the application
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func Execute() {
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if err := rootCmd.Execute(); err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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}
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@ -0,0 +1,34 @@
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// Vikunja is a todo-list application to facilitate your life.
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// Copyright 2019 Vikunja and contributors. All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package cmd
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import (
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"fmt"
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"github.com/spf13/cobra"
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)
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func init() {
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rootCmd.AddCommand(versionCmd)
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}
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var versionCmd = &cobra.Command{
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Use: "version",
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Short: "Print the version number of Vikunja",
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Run: func(cmd *cobra.Command, args []string) {
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fmt.Println("Vikunja api version " + Version)
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},
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}
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@ -0,0 +1,83 @@
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// Vikunja is a todo-list application to facilitate your life.
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// Copyright 2019 Vikunja and contributors. All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
|
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package cmd
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import (
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"code.vikunja.io/api/pkg/log"
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"code.vikunja.io/api/pkg/mail"
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"code.vikunja.io/api/pkg/models"
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"code.vikunja.io/api/pkg/routes"
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"code.vikunja.io/api/pkg/swagger"
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"context"
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"fmt"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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"os"
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"os/signal"
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"time"
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)
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func init() {
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rootCmd.AddCommand(webCmd)
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}
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var webCmd = &cobra.Command{
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Use: "web",
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Short: "Starts the rest api web server",
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Run: func(cmd *cobra.Command, args []string) {
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// Set logger
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log.InitLogger()
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// Set Engine
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err := models.SetEngine()
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if err != nil {
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log.Log.Fatal(err.Error())
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}
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// Start the mail daemon
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mail.StartMailDaemon()
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// Version notification
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fmt.Printf("Vikunja version %s\n", Version)
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// Additional swagger information
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swagger.SwaggerInfo.Version = Version
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// Start the webserver
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e := routes.NewEcho()
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routes.RegisterRoutes(e)
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// Start server
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go func() {
|
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if err := e.Start(viper.GetString("service.interface")); err != nil {
|
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e.Logger.Info("shutting down...")
|
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}
|
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}()
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|
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// Wait for interrupt signal to gracefully shutdown the server with
|
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// a timeout of 10 seconds.
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quit := make(chan os.Signal, 1)
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signal.Notify(quit, os.Interrupt)
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<-quit
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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log.Log.Infof("Shutting down...")
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if err := e.Shutdown(ctx); err != nil {
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e.Logger.Fatal(err)
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}
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},
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}
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@ -27,7 +27,7 @@ import (
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)
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// InitConfig initializes the config, sets defaults etc.
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func init() {
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func InitConfig() {
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// Set defaults
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// Service config
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|
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@ -17,10 +17,12 @@
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package models
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import (
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"code.vikunja.io/api/pkg/config"
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"github.com/spf13/viper"
|
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"testing"
|
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)
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func TestMain(m *testing.M) {
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config.InitConfig()
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MainTest(m, viper.GetString("service.rootpath"))
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}
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|
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@ -0,0 +1,13 @@
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Copyright 2014 Alan Shreve
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|
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Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
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|
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@ -0,0 +1,23 @@
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# mousetrap
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|
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mousetrap is a tiny library that answers a single question.
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|
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On a Windows machine, was the process invoked by someone double clicking on
|
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the executable file while browsing in explorer?
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|
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### Motivation
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|
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Windows developers unfamiliar with command line tools will often "double-click"
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the executable for a tool. Because most CLI tools print the help and then exit
|
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when invoked without arguments, this is often very frustrating for those users.
|
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|
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mousetrap provides a way to detect these invocations so that you can provide
|
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more helpful behavior and instructions on how to run the CLI tool. To see what
|
||||
this looks like, both from an organizational and a technical perspective, see
|
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https://inconshreveable.com/09-09-2014/sweat-the-small-stuff/
|
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|
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### The interface
|
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|
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The library exposes a single interface:
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|
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func StartedByExplorer() (bool)
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|
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@ -0,0 +1,15 @@
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// +build !windows
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|
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package mousetrap
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|
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// StartedByExplorer returns true if the program was invoked by the user
|
||||
// double-clicking on the executable from explorer.exe
|
||||
//
|
||||
// It is conservative and returns false if any of the internal calls fail.
|
||||
// It does not guarantee that the program was run from a terminal. It only can tell you
|
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// whether it was launched from explorer.exe
|
||||
//
|
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// On non-Windows platforms, it always returns false.
|
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func StartedByExplorer() bool {
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return false
|
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}
|
||||
|
|
@ -0,0 +1,98 @@
|
|||
// +build windows
|
||||
// +build !go1.4
|
||||
|
||||
package mousetrap
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
"syscall"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
const (
|
||||
// defined by the Win32 API
|
||||
th32cs_snapprocess uintptr = 0x2
|
||||
)
|
||||
|
||||
var (
|
||||
kernel = syscall.MustLoadDLL("kernel32.dll")
|
||||
CreateToolhelp32Snapshot = kernel.MustFindProc("CreateToolhelp32Snapshot")
|
||||
Process32First = kernel.MustFindProc("Process32FirstW")
|
||||
Process32Next = kernel.MustFindProc("Process32NextW")
|
||||
)
|
||||
|
||||
// ProcessEntry32 structure defined by the Win32 API
|
||||
type processEntry32 struct {
|
||||
dwSize uint32
|
||||
cntUsage uint32
|
||||
th32ProcessID uint32
|
||||
th32DefaultHeapID int
|
||||
th32ModuleID uint32
|
||||
cntThreads uint32
|
||||
th32ParentProcessID uint32
|
||||
pcPriClassBase int32
|
||||
dwFlags uint32
|
||||
szExeFile [syscall.MAX_PATH]uint16
|
||||
}
|
||||
|
||||
func getProcessEntry(pid int) (pe *processEntry32, err error) {
|
||||
snapshot, _, e1 := CreateToolhelp32Snapshot.Call(th32cs_snapprocess, uintptr(0))
|
||||
if snapshot == uintptr(syscall.InvalidHandle) {
|
||||
err = fmt.Errorf("CreateToolhelp32Snapshot: %v", e1)
|
||||
return
|
||||
}
|
||||
defer syscall.CloseHandle(syscall.Handle(snapshot))
|
||||
|
||||
var processEntry processEntry32
|
||||
processEntry.dwSize = uint32(unsafe.Sizeof(processEntry))
|
||||
ok, _, e1 := Process32First.Call(snapshot, uintptr(unsafe.Pointer(&processEntry)))
|
||||
if ok == 0 {
|
||||
err = fmt.Errorf("Process32First: %v", e1)
|
||||
return
|
||||
}
|
||||
|
||||
for {
|
||||
if processEntry.th32ProcessID == uint32(pid) {
|
||||
pe = &processEntry
|
||||
return
|
||||
}
|
||||
|
||||
ok, _, e1 = Process32Next.Call(snapshot, uintptr(unsafe.Pointer(&processEntry)))
|
||||
if ok == 0 {
|
||||
err = fmt.Errorf("Process32Next: %v", e1)
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func getppid() (pid int, err error) {
|
||||
pe, err := getProcessEntry(os.Getpid())
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
pid = int(pe.th32ParentProcessID)
|
||||
return
|
||||
}
|
||||
|
||||
// StartedByExplorer returns true if the program was invoked by the user double-clicking
|
||||
// on the executable from explorer.exe
|
||||
//
|
||||
// It is conservative and returns false if any of the internal calls fail.
|
||||
// It does not guarantee that the program was run from a terminal. It only can tell you
|
||||
// whether it was launched from explorer.exe
|
||||
func StartedByExplorer() bool {
|
||||
ppid, err := getppid()
|
||||
if err != nil {
|
||||
return false
|
||||
}
|
||||
|
||||
pe, err := getProcessEntry(ppid)
|
||||
if err != nil {
|
||||
return false
|
||||
}
|
||||
|
||||
name := syscall.UTF16ToString(pe.szExeFile[:])
|
||||
return name == "explorer.exe"
|
||||
}
|
||||
|
|
@ -0,0 +1,46 @@
|
|||
// +build windows
|
||||
// +build go1.4
|
||||
|
||||
package mousetrap
|
||||
|
||||
import (
|
||||
"os"
|
||||
"syscall"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
func getProcessEntry(pid int) (*syscall.ProcessEntry32, error) {
|
||||
snapshot, err := syscall.CreateToolhelp32Snapshot(syscall.TH32CS_SNAPPROCESS, 0)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer syscall.CloseHandle(snapshot)
|
||||
var procEntry syscall.ProcessEntry32
|
||||
procEntry.Size = uint32(unsafe.Sizeof(procEntry))
|
||||
if err = syscall.Process32First(snapshot, &procEntry); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
for {
|
||||
if procEntry.ProcessID == uint32(pid) {
|
||||
return &procEntry, nil
|
||||
}
|
||||
err = syscall.Process32Next(snapshot, &procEntry)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// StartedByExplorer returns true if the program was invoked by the user double-clicking
|
||||
// on the executable from explorer.exe
|
||||
//
|
||||
// It is conservative and returns false if any of the internal calls fail.
|
||||
// It does not guarantee that the program was run from a terminal. It only can tell you
|
||||
// whether it was launched from explorer.exe
|
||||
func StartedByExplorer() bool {
|
||||
pe, err := getProcessEntry(os.Getppid())
|
||||
if err != nil {
|
||||
return false
|
||||
}
|
||||
return "explorer.exe" == syscall.UTF16ToString(pe.ExeFile[:])
|
||||
}
|
||||
|
|
@ -0,0 +1,36 @@
|
|||
# Compiled Object files, Static and Dynamic libs (Shared Objects)
|
||||
*.o
|
||||
*.a
|
||||
*.so
|
||||
|
||||
# Folders
|
||||
_obj
|
||||
_test
|
||||
|
||||
# Architecture specific extensions/prefixes
|
||||
*.[568vq]
|
||||
[568vq].out
|
||||
|
||||
*.cgo1.go
|
||||
*.cgo2.c
|
||||
_cgo_defun.c
|
||||
_cgo_gotypes.go
|
||||
_cgo_export.*
|
||||
|
||||
_testmain.go
|
||||
|
||||
# Vim files https://github.com/github/gitignore/blob/master/Global/Vim.gitignore
|
||||
# swap
|
||||
[._]*.s[a-w][a-z]
|
||||
[._]s[a-w][a-z]
|
||||
# session
|
||||
Session.vim
|
||||
# temporary
|
||||
.netrwhist
|
||||
*~
|
||||
# auto-generated tag files
|
||||
tags
|
||||
|
||||
*.exe
|
||||
|
||||
cobra.test
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
Steve Francia <steve.francia@gmail.com>
|
||||
Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
|
||||
Fabiano Franz <ffranz@redhat.com> <contact@fabianofranz.com>
|
||||
|
|
@ -0,0 +1,21 @@
|
|||
language: go
|
||||
|
||||
matrix:
|
||||
include:
|
||||
- go: 1.9.4
|
||||
- go: 1.10.0
|
||||
- go: tip
|
||||
allow_failures:
|
||||
- go: tip
|
||||
|
||||
before_install:
|
||||
- mkdir -p bin
|
||||
- curl -Lso bin/shellcheck https://github.com/caarlos0/shellcheck-docker/releases/download/v0.4.3/shellcheck
|
||||
- chmod +x bin/shellcheck
|
||||
script:
|
||||
- PATH=$PATH:$PWD/bin go test -v ./...
|
||||
- go build
|
||||
- diff -u <(echo -n) <(gofmt -d -s .)
|
||||
- if [ -z $NOVET ]; then
|
||||
diff -u <(echo -n) <(go tool vet . 2>&1 | grep -vE 'ExampleCommand|bash_completions.*Fprint');
|
||||
fi
|
||||
|
|
@ -0,0 +1,174 @@
|
|||
Apache License
|
||||
Version 2.0, January 2004
|
||||
http://www.apache.org/licenses/
|
||||
|
||||
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
|
||||
|
||||
1. Definitions.
|
||||
|
||||
"License" shall mean the terms and conditions for use, reproduction,
|
||||
and distribution as defined by Sections 1 through 9 of this document.
|
||||
|
||||
"Licensor" shall mean the copyright owner or entity authorized by
|
||||
the copyright owner that is granting the License.
|
||||
|
||||
"Legal Entity" shall mean the union of the acting entity and all
|
||||
other entities that control, are controlled by, or are under common
|
||||
control with that entity. For the purposes of this definition,
|
||||
"control" means (i) the power, direct or indirect, to cause the
|
||||
direction or management of such entity, whether by contract or
|
||||
otherwise, or (ii) ownership of fifty percent (50%) or more of the
|
||||
outstanding shares, or (iii) beneficial ownership of such entity.
|
||||
|
||||
"You" (or "Your") shall mean an individual or Legal Entity
|
||||
exercising permissions granted by this License.
|
||||
|
||||
"Source" form shall mean the preferred form for making modifications,
|
||||
including but not limited to software source code, documentation
|
||||
source, and configuration files.
|
||||
|
||||
"Object" form shall mean any form resulting from mechanical
|
||||
transformation or translation of a Source form, including but
|
||||
not limited to compiled object code, generated documentation,
|
||||
and conversions to other media types.
|
||||
|
||||
"Work" shall mean the work of authorship, whether in Source or
|
||||
Object form, made available under the License, as indicated by a
|
||||
copyright notice that is included in or attached to the work
|
||||
(an example is provided in the Appendix below).
|
||||
|
||||
"Derivative Works" shall mean any work, whether in Source or Object
|
||||
form, that is based on (or derived from) the Work and for which the
|
||||
editorial revisions, annotations, elaborations, or other modifications
|
||||
represent, as a whole, an original work of authorship. For the purposes
|
||||
of this License, Derivative Works shall not include works that remain
|
||||
separable from, or merely link (or bind by name) to the interfaces of,
|
||||
the Work and Derivative Works thereof.
|
||||
|
||||
"Contribution" shall mean any work of authorship, including
|
||||
the original version of the Work and any modifications or additions
|
||||
to that Work or Derivative Works thereof, that is intentionally
|
||||
submitted to Licensor for inclusion in the Work by the copyright owner
|
||||
or by an individual or Legal Entity authorized to submit on behalf of
|
||||
the copyright owner. For the purposes of this definition, "submitted"
|
||||
means any form of electronic, verbal, or written communication sent
|
||||
to the Licensor or its representatives, including but not limited to
|
||||
communication on electronic mailing lists, source code control systems,
|
||||
and issue tracking systems that are managed by, or on behalf of, the
|
||||
Licensor for the purpose of discussing and improving the Work, but
|
||||
excluding communication that is conspicuously marked or otherwise
|
||||
designated in writing by the copyright owner as "Not a Contribution."
|
||||
|
||||
"Contributor" shall mean Licensor and any individual or Legal Entity
|
||||
on behalf of whom a Contribution has been received by Licensor and
|
||||
subsequently incorporated within the Work.
|
||||
|
||||
2. Grant of Copyright License. Subject to the terms and conditions of
|
||||
this License, each Contributor hereby grants to You a perpetual,
|
||||
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
|
||||
copyright license to reproduce, prepare Derivative Works of,
|
||||
publicly display, publicly perform, sublicense, and distribute the
|
||||
Work and such Derivative Works in Source or Object form.
|
||||
|
||||
3. Grant of Patent License. Subject to the terms and conditions of
|
||||
this License, each Contributor hereby grants to You a perpetual,
|
||||
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
|
||||
(except as stated in this section) patent license to make, have made,
|
||||
use, offer to sell, sell, import, and otherwise transfer the Work,
|
||||
where such license applies only to those patent claims licensable
|
||||
by such Contributor that are necessarily infringed by their
|
||||
Contribution(s) alone or by combination of their Contribution(s)
|
||||
with the Work to which such Contribution(s) was submitted. If You
|
||||
institute patent litigation against any entity (including a
|
||||
cross-claim or counterclaim in a lawsuit) alleging that the Work
|
||||
or a Contribution incorporated within the Work constitutes direct
|
||||
or contributory patent infringement, then any patent licenses
|
||||
granted to You under this License for that Work shall terminate
|
||||
as of the date such litigation is filed.
|
||||
|
||||
4. Redistribution. You may reproduce and distribute copies of the
|
||||
Work or Derivative Works thereof in any medium, with or without
|
||||
modifications, and in Source or Object form, provided that You
|
||||
meet the following conditions:
|
||||
|
||||
(a) You must give any other recipients of the Work or
|
||||
Derivative Works a copy of this License; and
|
||||
|
||||
(b) You must cause any modified files to carry prominent notices
|
||||
stating that You changed the files; and
|
||||
|
||||
(c) You must retain, in the Source form of any Derivative Works
|
||||
that You distribute, all copyright, patent, trademark, and
|
||||
attribution notices from the Source form of the Work,
|
||||
excluding those notices that do not pertain to any part of
|
||||
the Derivative Works; and
|
||||
|
||||
(d) If the Work includes a "NOTICE" text file as part of its
|
||||
distribution, then any Derivative Works that You distribute must
|
||||
include a readable copy of the attribution notices contained
|
||||
within such NOTICE file, excluding those notices that do not
|
||||
pertain to any part of the Derivative Works, in at least one
|
||||
of the following places: within a NOTICE text file distributed
|
||||
as part of the Derivative Works; within the Source form or
|
||||
documentation, if provided along with the Derivative Works; or,
|
||||
within a display generated by the Derivative Works, if and
|
||||
wherever such third-party notices normally appear. The contents
|
||||
of the NOTICE file are for informational purposes only and
|
||||
do not modify the License. You may add Your own attribution
|
||||
notices within Derivative Works that You distribute, alongside
|
||||
or as an addendum to the NOTICE text from the Work, provided
|
||||
that such additional attribution notices cannot be construed
|
||||
as modifying the License.
|
||||
|
||||
You may add Your own copyright statement to Your modifications and
|
||||
may provide additional or different license terms and conditions
|
||||
for use, reproduction, or distribution of Your modifications, or
|
||||
for any such Derivative Works as a whole, provided Your use,
|
||||
reproduction, and distribution of the Work otherwise complies with
|
||||
the conditions stated in this License.
|
||||
|
||||
5. Submission of Contributions. Unless You explicitly state otherwise,
|
||||
any Contribution intentionally submitted for inclusion in the Work
|
||||
by You to the Licensor shall be under the terms and conditions of
|
||||
this License, without any additional terms or conditions.
|
||||
Notwithstanding the above, nothing herein shall supersede or modify
|
||||
the terms of any separate license agreement you may have executed
|
||||
with Licensor regarding such Contributions.
|
||||
|
||||
6. Trademarks. This License does not grant permission to use the trade
|
||||
names, trademarks, service marks, or product names of the Licensor,
|
||||
except as required for reasonable and customary use in describing the
|
||||
origin of the Work and reproducing the content of the NOTICE file.
|
||||
|
||||
7. Disclaimer of Warranty. Unless required by applicable law or
|
||||
agreed to in writing, Licensor provides the Work (and each
|
||||
Contributor provides its Contributions) on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
||||
implied, including, without limitation, any warranties or conditions
|
||||
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
|
||||
PARTICULAR PURPOSE. You are solely responsible for determining the
|
||||
appropriateness of using or redistributing the Work and assume any
|
||||
risks associated with Your exercise of permissions under this License.
|
||||
|
||||
8. Limitation of Liability. In no event and under no legal theory,
|
||||
whether in tort (including negligence), contract, or otherwise,
|
||||
unless required by applicable law (such as deliberate and grossly
|
||||
negligent acts) or agreed to in writing, shall any Contributor be
|
||||
liable to You for damages, including any direct, indirect, special,
|
||||
incidental, or consequential damages of any character arising as a
|
||||
result of this License or out of the use or inability to use the
|
||||
Work (including but not limited to damages for loss of goodwill,
|
||||
work stoppage, computer failure or malfunction, or any and all
|
||||
other commercial damages or losses), even if such Contributor
|
||||
has been advised of the possibility of such damages.
|
||||
|
||||
9. Accepting Warranty or Additional Liability. While redistributing
|
||||
the Work or Derivative Works thereof, You may choose to offer,
|
||||
and charge a fee for, acceptance of support, warranty, indemnity,
|
||||
or other liability obligations and/or rights consistent with this
|
||||
License. However, in accepting such obligations, You may act only
|
||||
on Your own behalf and on Your sole responsibility, not on behalf
|
||||
of any other Contributor, and only if You agree to indemnify,
|
||||
defend, and hold each Contributor harmless for any liability
|
||||
incurred by, or claims asserted against, such Contributor by reason
|
||||
of your accepting any such warranty or additional liability.
|
||||
|
|
@ -0,0 +1,736 @@
|
|||
|
||||
|
||||
Cobra is both a library for creating powerful modern CLI applications as well as a program to generate applications and command files.
|
||||
|
||||
Many of the most widely used Go projects are built using Cobra including:
|
||||
|
||||
* [Kubernetes](http://kubernetes.io/)
|
||||
* [Hugo](http://gohugo.io)
|
||||
* [rkt](https://github.com/coreos/rkt)
|
||||
* [etcd](https://github.com/coreos/etcd)
|
||||
* [Moby (former Docker)](https://github.com/moby/moby)
|
||||
* [Docker (distribution)](https://github.com/docker/distribution)
|
||||
* [OpenShift](https://www.openshift.com/)
|
||||
* [Delve](https://github.com/derekparker/delve)
|
||||
* [GopherJS](http://www.gopherjs.org/)
|
||||
* [CockroachDB](http://www.cockroachlabs.com/)
|
||||
* [Bleve](http://www.blevesearch.com/)
|
||||
* [ProjectAtomic (enterprise)](http://www.projectatomic.io/)
|
||||
* [GiantSwarm's swarm](https://github.com/giantswarm/cli)
|
||||
* [Nanobox](https://github.com/nanobox-io/nanobox)/[Nanopack](https://github.com/nanopack)
|
||||
* [rclone](http://rclone.org/)
|
||||
* [nehm](https://github.com/bogem/nehm)
|
||||
* [Pouch](https://github.com/alibaba/pouch)
|
||||
|
||||
[](https://travis-ci.org/spf13/cobra)
|
||||
[](https://circleci.com/gh/spf13/cobra)
|
||||
[](https://godoc.org/github.com/spf13/cobra)
|
||||
|
||||
# Table of Contents
|
||||
|
||||
- [Overview](#overview)
|
||||
- [Concepts](#concepts)
|
||||
* [Commands](#commands)
|
||||
* [Flags](#flags)
|
||||
- [Installing](#installing)
|
||||
- [Getting Started](#getting-started)
|
||||
* [Using the Cobra Generator](#using-the-cobra-generator)
|
||||
* [Using the Cobra Library](#using-the-cobra-library)
|
||||
* [Working with Flags](#working-with-flags)
|
||||
* [Positional and Custom Arguments](#positional-and-custom-arguments)
|
||||
* [Example](#example)
|
||||
* [Help Command](#help-command)
|
||||
* [Usage Message](#usage-message)
|
||||
* [PreRun and PostRun Hooks](#prerun-and-postrun-hooks)
|
||||
* [Suggestions when "unknown command" happens](#suggestions-when-unknown-command-happens)
|
||||
* [Generating documentation for your command](#generating-documentation-for-your-command)
|
||||
* [Generating bash completions](#generating-bash-completions)
|
||||
- [Contributing](#contributing)
|
||||
- [License](#license)
|
||||
|
||||
# Overview
|
||||
|
||||
Cobra is a library providing a simple interface to create powerful modern CLI
|
||||
interfaces similar to git & go tools.
|
||||
|
||||
Cobra is also an application that will generate your application scaffolding to rapidly
|
||||
develop a Cobra-based application.
|
||||
|
||||
Cobra provides:
|
||||
* Easy subcommand-based CLIs: `app server`, `app fetch`, etc.
|
||||
* Fully POSIX-compliant flags (including short & long versions)
|
||||
* Nested subcommands
|
||||
* Global, local and cascading flags
|
||||
* Easy generation of applications & commands with `cobra init appname` & `cobra add cmdname`
|
||||
* Intelligent suggestions (`app srver`... did you mean `app server`?)
|
||||
* Automatic help generation for commands and flags
|
||||
* Automatic help flag recognition of `-h`, `--help`, etc.
|
||||
* Automatically generated bash autocomplete for your application
|
||||
* Automatically generated man pages for your application
|
||||
* Command aliases so you can change things without breaking them
|
||||
* The flexibility to define your own help, usage, etc.
|
||||
* Optional tight integration with [viper](http://github.com/spf13/viper) for 12-factor apps
|
||||
|
||||
# Concepts
|
||||
|
||||
Cobra is built on a structure of commands, arguments & flags.
|
||||
|
||||
**Commands** represent actions, **Args** are things and **Flags** are modifiers for those actions.
|
||||
|
||||
The best applications will read like sentences when used. Users will know how
|
||||
to use the application because they will natively understand how to use it.
|
||||
|
||||
The pattern to follow is
|
||||
`APPNAME VERB NOUN --ADJECTIVE.`
|
||||
or
|
||||
`APPNAME COMMAND ARG --FLAG`
|
||||
|
||||
A few good real world examples may better illustrate this point.
|
||||
|
||||
In the following example, 'server' is a command, and 'port' is a flag:
|
||||
|
||||
hugo server --port=1313
|
||||
|
||||
In this command we are telling Git to clone the url bare.
|
||||
|
||||
git clone URL --bare
|
||||
|
||||
## Commands
|
||||
|
||||
Command is the central point of the application. Each interaction that
|
||||
the application supports will be contained in a Command. A command can
|
||||
have children commands and optionally run an action.
|
||||
|
||||
In the example above, 'server' is the command.
|
||||
|
||||
[More about cobra.Command](https://godoc.org/github.com/spf13/cobra#Command)
|
||||
|
||||
## Flags
|
||||
|
||||
A flag is a way to modify the behavior of a command. Cobra supports
|
||||
fully POSIX-compliant flags as well as the Go [flag package](https://golang.org/pkg/flag/).
|
||||
A Cobra command can define flags that persist through to children commands
|
||||
and flags that are only available to that command.
|
||||
|
||||
In the example above, 'port' is the flag.
|
||||
|
||||
Flag functionality is provided by the [pflag
|
||||
library](https://github.com/spf13/pflag), a fork of the flag standard library
|
||||
which maintains the same interface while adding POSIX compliance.
|
||||
|
||||
# Installing
|
||||
Using Cobra is easy. First, use `go get` to install the latest version
|
||||
of the library. This command will install the `cobra` generator executable
|
||||
along with the library and its dependencies:
|
||||
|
||||
go get -u github.com/spf13/cobra/cobra
|
||||
|
||||
Next, include Cobra in your application:
|
||||
|
||||
```go
|
||||
import "github.com/spf13/cobra"
|
||||
```
|
||||
|
||||
# Getting Started
|
||||
|
||||
While you are welcome to provide your own organization, typically a Cobra-based
|
||||
application will follow the following organizational structure:
|
||||
|
||||
```
|
||||
▾ appName/
|
||||
▾ cmd/
|
||||
add.go
|
||||
your.go
|
||||
commands.go
|
||||
here.go
|
||||
main.go
|
||||
```
|
||||
|
||||
In a Cobra app, typically the main.go file is very bare. It serves one purpose: initializing Cobra.
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
|
||||
"{pathToYourApp}/cmd"
|
||||
)
|
||||
|
||||
func main() {
|
||||
cmd.Execute()
|
||||
}
|
||||
```
|
||||
|
||||
## Using the Cobra Generator
|
||||
|
||||
Cobra provides its own program that will create your application and add any
|
||||
commands you want. It's the easiest way to incorporate Cobra into your application.
|
||||
|
||||
[Here](https://github.com/spf13/cobra/blob/master/cobra/README.md) you can find more information about it.
|
||||
|
||||
## Using the Cobra Library
|
||||
|
||||
To manually implement Cobra you need to create a bare main.go file and a rootCmd file.
|
||||
You will optionally provide additional commands as you see fit.
|
||||
|
||||
### Create rootCmd
|
||||
|
||||
Cobra doesn't require any special constructors. Simply create your commands.
|
||||
|
||||
Ideally you place this in app/cmd/root.go:
|
||||
|
||||
```go
|
||||
var rootCmd = &cobra.Command{
|
||||
Use: "hugo",
|
||||
Short: "Hugo is a very fast static site generator",
|
||||
Long: `A Fast and Flexible Static Site Generator built with
|
||||
love by spf13 and friends in Go.
|
||||
Complete documentation is available at http://hugo.spf13.com`,
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
// Do Stuff Here
|
||||
},
|
||||
}
|
||||
|
||||
func Execute() {
|
||||
if err := rootCmd.Execute(); err != nil {
|
||||
fmt.Println(err)
|
||||
os.Exit(1)
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
You will additionally define flags and handle configuration in your init() function.
|
||||
|
||||
For example cmd/root.go:
|
||||
|
||||
```go
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
|
||||
homedir "github.com/mitchellh/go-homedir"
|
||||
"github.com/spf13/cobra"
|
||||
"github.com/spf13/viper"
|
||||
)
|
||||
|
||||
func init() {
|
||||
cobra.OnInitialize(initConfig)
|
||||
rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.cobra.yaml)")
|
||||
rootCmd.PersistentFlags().StringVarP(&projectBase, "projectbase", "b", "", "base project directory eg. github.com/spf13/")
|
||||
rootCmd.PersistentFlags().StringP("author", "a", "YOUR NAME", "Author name for copyright attribution")
|
||||
rootCmd.PersistentFlags().StringVarP(&userLicense, "license", "l", "", "Name of license for the project (can provide `licensetext` in config)")
|
||||
rootCmd.PersistentFlags().Bool("viper", true, "Use Viper for configuration")
|
||||
viper.BindPFlag("author", rootCmd.PersistentFlags().Lookup("author"))
|
||||
viper.BindPFlag("projectbase", rootCmd.PersistentFlags().Lookup("projectbase"))
|
||||
viper.BindPFlag("useViper", rootCmd.PersistentFlags().Lookup("viper"))
|
||||
viper.SetDefault("author", "NAME HERE <EMAIL ADDRESS>")
|
||||
viper.SetDefault("license", "apache")
|
||||
}
|
||||
|
||||
func initConfig() {
|
||||
// Don't forget to read config either from cfgFile or from home directory!
|
||||
if cfgFile != "" {
|
||||
// Use config file from the flag.
|
||||
viper.SetConfigFile(cfgFile)
|
||||
} else {
|
||||
// Find home directory.
|
||||
home, err := homedir.Dir()
|
||||
if err != nil {
|
||||
fmt.Println(err)
|
||||
os.Exit(1)
|
||||
}
|
||||
|
||||
// Search config in home directory with name ".cobra" (without extension).
|
||||
viper.AddConfigPath(home)
|
||||
viper.SetConfigName(".cobra")
|
||||
}
|
||||
|
||||
if err := viper.ReadInConfig(); err != nil {
|
||||
fmt.Println("Can't read config:", err)
|
||||
os.Exit(1)
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### Create your main.go
|
||||
|
||||
With the root command you need to have your main function execute it.
|
||||
Execute should be run on the root for clarity, though it can be called on any command.
|
||||
|
||||
In a Cobra app, typically the main.go file is very bare. It serves, one purpose, to initialize Cobra.
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
|
||||
"{pathToYourApp}/cmd"
|
||||
)
|
||||
|
||||
func main() {
|
||||
cmd.Execute()
|
||||
}
|
||||
```
|
||||
|
||||
### Create additional commands
|
||||
|
||||
Additional commands can be defined and typically are each given their own file
|
||||
inside of the cmd/ directory.
|
||||
|
||||
If you wanted to create a version command you would create cmd/version.go and
|
||||
populate it with the following:
|
||||
|
||||
```go
|
||||
package cmd
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
|
||||
"github.com/spf13/cobra"
|
||||
)
|
||||
|
||||
func init() {
|
||||
rootCmd.AddCommand(versionCmd)
|
||||
}
|
||||
|
||||
var versionCmd = &cobra.Command{
|
||||
Use: "version",
|
||||
Short: "Print the version number of Hugo",
|
||||
Long: `All software has versions. This is Hugo's`,
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Println("Hugo Static Site Generator v0.9 -- HEAD")
|
||||
},
|
||||
}
|
||||
```
|
||||
|
||||
## Working with Flags
|
||||
|
||||
Flags provide modifiers to control how the action command operates.
|
||||
|
||||
### Assign flags to a command
|
||||
|
||||
Since the flags are defined and used in different locations, we need to
|
||||
define a variable outside with the correct scope to assign the flag to
|
||||
work with.
|
||||
|
||||
```go
|
||||
var Verbose bool
|
||||
var Source string
|
||||
```
|
||||
|
||||
There are two different approaches to assign a flag.
|
||||
|
||||
### Persistent Flags
|
||||
|
||||
A flag can be 'persistent' meaning that this flag will be available to the
|
||||
command it's assigned to as well as every command under that command. For
|
||||
global flags, assign a flag as a persistent flag on the root.
|
||||
|
||||
```go
|
||||
rootCmd.PersistentFlags().BoolVarP(&Verbose, "verbose", "v", false, "verbose output")
|
||||
```
|
||||
|
||||
### Local Flags
|
||||
|
||||
A flag can also be assigned locally which will only apply to that specific command.
|
||||
|
||||
```go
|
||||
rootCmd.Flags().StringVarP(&Source, "source", "s", "", "Source directory to read from")
|
||||
```
|
||||
|
||||
### Local Flag on Parent Commands
|
||||
|
||||
By default Cobra only parses local flags on the target command, any local flags on
|
||||
parent commands are ignored. By enabling `Command.TraverseChildren` Cobra will
|
||||
parse local flags on each command before executing the target command.
|
||||
|
||||
```go
|
||||
command := cobra.Command{
|
||||
Use: "print [OPTIONS] [COMMANDS]",
|
||||
TraverseChildren: true,
|
||||
}
|
||||
```
|
||||
|
||||
### Bind Flags with Config
|
||||
|
||||
You can also bind your flags with [viper](https://github.com/spf13/viper):
|
||||
```go
|
||||
var author string
|
||||
|
||||
func init() {
|
||||
rootCmd.PersistentFlags().StringVar(&author, "author", "YOUR NAME", "Author name for copyright attribution")
|
||||
viper.BindPFlag("author", rootCmd.PersistentFlags().Lookup("author"))
|
||||
}
|
||||
```
|
||||
|
||||
In this example the persistent flag `author` is bound with `viper`.
|
||||
**Note**, that the variable `author` will not be set to the value from config,
|
||||
when the `--author` flag is not provided by user.
|
||||
|
||||
More in [viper documentation](https://github.com/spf13/viper#working-with-flags).
|
||||
|
||||
### Required flags
|
||||
|
||||
Flags are optional by default. If instead you wish your command to report an error
|
||||
when a flag has not been set, mark it as required:
|
||||
```go
|
||||
rootCmd.Flags().StringVarP(&Region, "region", "r", "", "AWS region (required)")
|
||||
rootCmd.MarkFlagRequired("region")
|
||||
```
|
||||
|
||||
## Positional and Custom Arguments
|
||||
|
||||
Validation of positional arguments can be specified using the `Args` field
|
||||
of `Command`.
|
||||
|
||||
The following validators are built in:
|
||||
|
||||
- `NoArgs` - the command will report an error if there are any positional args.
|
||||
- `ArbitraryArgs` - the command will accept any args.
|
||||
- `OnlyValidArgs` - the command will report an error if there are any positional args that are not in the `ValidArgs` field of `Command`.
|
||||
- `MinimumNArgs(int)` - the command will report an error if there are not at least N positional args.
|
||||
- `MaximumNArgs(int)` - the command will report an error if there are more than N positional args.
|
||||
- `ExactArgs(int)` - the command will report an error if there are not exactly N positional args.
|
||||
- `RangeArgs(min, max)` - the command will report an error if the number of args is not between the minimum and maximum number of expected args.
|
||||
|
||||
An example of setting the custom validator:
|
||||
|
||||
```go
|
||||
var cmd = &cobra.Command{
|
||||
Short: "hello",
|
||||
Args: func(cmd *cobra.Command, args []string) error {
|
||||
if len(args) < 1 {
|
||||
return errors.New("requires at least one arg")
|
||||
}
|
||||
if myapp.IsValidColor(args[0]) {
|
||||
return nil
|
||||
}
|
||||
return fmt.Errorf("invalid color specified: %s", args[0])
|
||||
},
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Println("Hello, World!")
|
||||
},
|
||||
}
|
||||
```
|
||||
|
||||
## Example
|
||||
|
||||
In the example below, we have defined three commands. Two are at the top level
|
||||
and one (cmdTimes) is a child of one of the top commands. In this case the root
|
||||
is not executable meaning that a subcommand is required. This is accomplished
|
||||
by not providing a 'Run' for the 'rootCmd'.
|
||||
|
||||
We have only defined one flag for a single command.
|
||||
|
||||
More documentation about flags is available at https://github.com/spf13/pflag
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"strings"
|
||||
|
||||
"github.com/spf13/cobra"
|
||||
)
|
||||
|
||||
func main() {
|
||||
var echoTimes int
|
||||
|
||||
var cmdPrint = &cobra.Command{
|
||||
Use: "print [string to print]",
|
||||
Short: "Print anything to the screen",
|
||||
Long: `print is for printing anything back to the screen.
|
||||
For many years people have printed back to the screen.`,
|
||||
Args: cobra.MinimumNArgs(1),
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Println("Print: " + strings.Join(args, " "))
|
||||
},
|
||||
}
|
||||
|
||||
var cmdEcho = &cobra.Command{
|
||||
Use: "echo [string to echo]",
|
||||
Short: "Echo anything to the screen",
|
||||
Long: `echo is for echoing anything back.
|
||||
Echo works a lot like print, except it has a child command.`,
|
||||
Args: cobra.MinimumNArgs(1),
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Println("Print: " + strings.Join(args, " "))
|
||||
},
|
||||
}
|
||||
|
||||
var cmdTimes = &cobra.Command{
|
||||
Use: "times [# times] [string to echo]",
|
||||
Short: "Echo anything to the screen more times",
|
||||
Long: `echo things multiple times back to the user by providing
|
||||
a count and a string.`,
|
||||
Args: cobra.MinimumNArgs(1),
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
for i := 0; i < echoTimes; i++ {
|
||||
fmt.Println("Echo: " + strings.Join(args, " "))
|
||||
}
|
||||
},
|
||||
}
|
||||
|
||||
cmdTimes.Flags().IntVarP(&echoTimes, "times", "t", 1, "times to echo the input")
|
||||
|
||||
var rootCmd = &cobra.Command{Use: "app"}
|
||||
rootCmd.AddCommand(cmdPrint, cmdEcho)
|
||||
cmdEcho.AddCommand(cmdTimes)
|
||||
rootCmd.Execute()
|
||||
}
|
||||
```
|
||||
|
||||
For a more complete example of a larger application, please checkout [Hugo](http://gohugo.io/).
|
||||
|
||||
## Help Command
|
||||
|
||||
Cobra automatically adds a help command to your application when you have subcommands.
|
||||
This will be called when a user runs 'app help'. Additionally, help will also
|
||||
support all other commands as input. Say, for instance, you have a command called
|
||||
'create' without any additional configuration; Cobra will work when 'app help
|
||||
create' is called. Every command will automatically have the '--help' flag added.
|
||||
|
||||
### Example
|
||||
|
||||
The following output is automatically generated by Cobra. Nothing beyond the
|
||||
command and flag definitions are needed.
|
||||
|
||||
$ cobra help
|
||||
|
||||
Cobra is a CLI library for Go that empowers applications.
|
||||
This application is a tool to generate the needed files
|
||||
to quickly create a Cobra application.
|
||||
|
||||
Usage:
|
||||
cobra [command]
|
||||
|
||||
Available Commands:
|
||||
add Add a command to a Cobra Application
|
||||
help Help about any command
|
||||
init Initialize a Cobra Application
|
||||
|
||||
Flags:
|
||||
-a, --author string author name for copyright attribution (default "YOUR NAME")
|
||||
--config string config file (default is $HOME/.cobra.yaml)
|
||||
-h, --help help for cobra
|
||||
-l, --license string name of license for the project
|
||||
--viper use Viper for configuration (default true)
|
||||
|
||||
Use "cobra [command] --help" for more information about a command.
|
||||
|
||||
|
||||
Help is just a command like any other. There is no special logic or behavior
|
||||
around it. In fact, you can provide your own if you want.
|
||||
|
||||
### Defining your own help
|
||||
|
||||
You can provide your own Help command or your own template for the default command to use
|
||||
with following functions:
|
||||
|
||||
```go
|
||||
cmd.SetHelpCommand(cmd *Command)
|
||||
cmd.SetHelpFunc(f func(*Command, []string))
|
||||
cmd.SetHelpTemplate(s string)
|
||||
```
|
||||
|
||||
The latter two will also apply to any children commands.
|
||||
|
||||
## Usage Message
|
||||
|
||||
When the user provides an invalid flag or invalid command, Cobra responds by
|
||||
showing the user the 'usage'.
|
||||
|
||||
### Example
|
||||
You may recognize this from the help above. That's because the default help
|
||||
embeds the usage as part of its output.
|
||||
|
||||
$ cobra --invalid
|
||||
Error: unknown flag: --invalid
|
||||
Usage:
|
||||
cobra [command]
|
||||
|
||||
Available Commands:
|
||||
add Add a command to a Cobra Application
|
||||
help Help about any command
|
||||
init Initialize a Cobra Application
|
||||
|
||||
Flags:
|
||||
-a, --author string author name for copyright attribution (default "YOUR NAME")
|
||||
--config string config file (default is $HOME/.cobra.yaml)
|
||||
-h, --help help for cobra
|
||||
-l, --license string name of license for the project
|
||||
--viper use Viper for configuration (default true)
|
||||
|
||||
Use "cobra [command] --help" for more information about a command.
|
||||
|
||||
### Defining your own usage
|
||||
You can provide your own usage function or template for Cobra to use.
|
||||
Like help, the function and template are overridable through public methods:
|
||||
|
||||
```go
|
||||
cmd.SetUsageFunc(f func(*Command) error)
|
||||
cmd.SetUsageTemplate(s string)
|
||||
```
|
||||
|
||||
## Version Flag
|
||||
|
||||
Cobra adds a top-level '--version' flag if the Version field is set on the root command.
|
||||
Running an application with the '--version' flag will print the version to stdout using
|
||||
the version template. The template can be customized using the
|
||||
`cmd.SetVersionTemplate(s string)` function.
|
||||
|
||||
## PreRun and PostRun Hooks
|
||||
|
||||
It is possible to run functions before or after the main `Run` function of your command. The `PersistentPreRun` and `PreRun` functions will be executed before `Run`. `PersistentPostRun` and `PostRun` will be executed after `Run`. The `Persistent*Run` functions will be inherited by children if they do not declare their own. These functions are run in the following order:
|
||||
|
||||
- `PersistentPreRun`
|
||||
- `PreRun`
|
||||
- `Run`
|
||||
- `PostRun`
|
||||
- `PersistentPostRun`
|
||||
|
||||
An example of two commands which use all of these features is below. When the subcommand is executed, it will run the root command's `PersistentPreRun` but not the root command's `PersistentPostRun`:
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
|
||||
"github.com/spf13/cobra"
|
||||
)
|
||||
|
||||
func main() {
|
||||
|
||||
var rootCmd = &cobra.Command{
|
||||
Use: "root [sub]",
|
||||
Short: "My root command",
|
||||
PersistentPreRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd PersistentPreRun with args: %v\n", args)
|
||||
},
|
||||
PreRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd PreRun with args: %v\n", args)
|
||||
},
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd Run with args: %v\n", args)
|
||||
},
|
||||
PostRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd PostRun with args: %v\n", args)
|
||||
},
|
||||
PersistentPostRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside rootCmd PersistentPostRun with args: %v\n", args)
|
||||
},
|
||||
}
|
||||
|
||||
var subCmd = &cobra.Command{
|
||||
Use: "sub [no options!]",
|
||||
Short: "My subcommand",
|
||||
PreRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside subCmd PreRun with args: %v\n", args)
|
||||
},
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside subCmd Run with args: %v\n", args)
|
||||
},
|
||||
PostRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside subCmd PostRun with args: %v\n", args)
|
||||
},
|
||||
PersistentPostRun: func(cmd *cobra.Command, args []string) {
|
||||
fmt.Printf("Inside subCmd PersistentPostRun with args: %v\n", args)
|
||||
},
|
||||
}
|
||||
|
||||
rootCmd.AddCommand(subCmd)
|
||||
|
||||
rootCmd.SetArgs([]string{""})
|
||||
rootCmd.Execute()
|
||||
fmt.Println()
|
||||
rootCmd.SetArgs([]string{"sub", "arg1", "arg2"})
|
||||
rootCmd.Execute()
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
```
|
||||
Inside rootCmd PersistentPreRun with args: []
|
||||
Inside rootCmd PreRun with args: []
|
||||
Inside rootCmd Run with args: []
|
||||
Inside rootCmd PostRun with args: []
|
||||
Inside rootCmd PersistentPostRun with args: []
|
||||
|
||||
Inside rootCmd PersistentPreRun with args: [arg1 arg2]
|
||||
Inside subCmd PreRun with args: [arg1 arg2]
|
||||
Inside subCmd Run with args: [arg1 arg2]
|
||||
Inside subCmd PostRun with args: [arg1 arg2]
|
||||
Inside subCmd PersistentPostRun with args: [arg1 arg2]
|
||||
```
|
||||
|
||||
## Suggestions when "unknown command" happens
|
||||
|
||||
Cobra will print automatic suggestions when "unknown command" errors happen. This allows Cobra to behave similarly to the `git` command when a typo happens. For example:
|
||||
|
||||
```
|
||||
$ hugo srever
|
||||
Error: unknown command "srever" for "hugo"
|
||||
|
||||
Did you mean this?
|
||||
server
|
||||
|
||||
Run 'hugo --help' for usage.
|
||||
```
|
||||
|
||||
Suggestions are automatic based on every subcommand registered and use an implementation of [Levenshtein distance](http://en.wikipedia.org/wiki/Levenshtein_distance). Every registered command that matches a minimum distance of 2 (ignoring case) will be displayed as a suggestion.
|
||||
|
||||
If you need to disable suggestions or tweak the string distance in your command, use:
|
||||
|
||||
```go
|
||||
command.DisableSuggestions = true
|
||||
```
|
||||
|
||||
or
|
||||
|
||||
```go
|
||||
command.SuggestionsMinimumDistance = 1
|
||||
```
|
||||
|
||||
You can also explicitly set names for which a given command will be suggested using the `SuggestFor` attribute. This allows suggestions for strings that are not close in terms of string distance, but makes sense in your set of commands and for some which you don't want aliases. Example:
|
||||
|
||||
```
|
||||
$ kubectl remove
|
||||
Error: unknown command "remove" for "kubectl"
|
||||
|
||||
Did you mean this?
|
||||
delete
|
||||
|
||||
Run 'kubectl help' for usage.
|
||||
```
|
||||
|
||||
## Generating documentation for your command
|
||||
|
||||
Cobra can generate documentation based on subcommands, flags, etc. in the following formats:
|
||||
|
||||
- [Markdown](doc/md_docs.md)
|
||||
- [ReStructured Text](doc/rest_docs.md)
|
||||
- [Man Page](doc/man_docs.md)
|
||||
|
||||
## Generating bash completions
|
||||
|
||||
Cobra can generate a bash-completion file. If you add more information to your command, these completions can be amazingly powerful and flexible. Read more about it in [Bash Completions](bash_completions.md).
|
||||
|
||||
# Contributing
|
||||
|
||||
1. Fork it
|
||||
2. Download your fork to your PC (`git clone https://github.com/your_username/cobra && cd cobra`)
|
||||
3. Create your feature branch (`git checkout -b my-new-feature`)
|
||||
4. Make changes and add them (`git add .`)
|
||||
5. Commit your changes (`git commit -m 'Add some feature'`)
|
||||
6. Push to the branch (`git push origin my-new-feature`)
|
||||
7. Create new pull request
|
||||
|
||||
# License
|
||||
|
||||
Cobra is released under the Apache 2.0 license. See [LICENSE.txt](https://github.com/spf13/cobra/blob/master/LICENSE.txt)
|
||||
|
|
@ -0,0 +1,89 @@
|
|||
package cobra
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
)
|
||||
|
||||
type PositionalArgs func(cmd *Command, args []string) error
|
||||
|
||||
// Legacy arg validation has the following behaviour:
|
||||
// - root commands with no subcommands can take arbitrary arguments
|
||||
// - root commands with subcommands will do subcommand validity checking
|
||||
// - subcommands will always accept arbitrary arguments
|
||||
func legacyArgs(cmd *Command, args []string) error {
|
||||
// no subcommand, always take args
|
||||
if !cmd.HasSubCommands() {
|
||||
return nil
|
||||
}
|
||||
|
||||
// root command with subcommands, do subcommand checking.
|
||||
if !cmd.HasParent() && len(args) > 0 {
|
||||
return fmt.Errorf("unknown command %q for %q%s", args[0], cmd.CommandPath(), cmd.findSuggestions(args[0]))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// NoArgs returns an error if any args are included.
|
||||
func NoArgs(cmd *Command, args []string) error {
|
||||
if len(args) > 0 {
|
||||
return fmt.Errorf("unknown command %q for %q", args[0], cmd.CommandPath())
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// OnlyValidArgs returns an error if any args are not in the list of ValidArgs.
|
||||
func OnlyValidArgs(cmd *Command, args []string) error {
|
||||
if len(cmd.ValidArgs) > 0 {
|
||||
for _, v := range args {
|
||||
if !stringInSlice(v, cmd.ValidArgs) {
|
||||
return fmt.Errorf("invalid argument %q for %q%s", v, cmd.CommandPath(), cmd.findSuggestions(args[0]))
|
||||
}
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// ArbitraryArgs never returns an error.
|
||||
func ArbitraryArgs(cmd *Command, args []string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// MinimumNArgs returns an error if there is not at least N args.
|
||||
func MinimumNArgs(n int) PositionalArgs {
|
||||
return func(cmd *Command, args []string) error {
|
||||
if len(args) < n {
|
||||
return fmt.Errorf("requires at least %d arg(s), only received %d", n, len(args))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
}
|
||||
|
||||
// MaximumNArgs returns an error if there are more than N args.
|
||||
func MaximumNArgs(n int) PositionalArgs {
|
||||
return func(cmd *Command, args []string) error {
|
||||
if len(args) > n {
|
||||
return fmt.Errorf("accepts at most %d arg(s), received %d", n, len(args))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
}
|
||||
|
||||
// ExactArgs returns an error if there are not exactly n args.
|
||||
func ExactArgs(n int) PositionalArgs {
|
||||
return func(cmd *Command, args []string) error {
|
||||
if len(args) != n {
|
||||
return fmt.Errorf("accepts %d arg(s), received %d", n, len(args))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
}
|
||||
|
||||
// RangeArgs returns an error if the number of args is not within the expected range.
|
||||
func RangeArgs(min int, max int) PositionalArgs {
|
||||
return func(cmd *Command, args []string) error {
|
||||
if len(args) < min || len(args) > max {
|
||||
return fmt.Errorf("accepts between %d and %d arg(s), received %d", min, max, len(args))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,584 @@
|
|||
package cobra
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
"io"
|
||||
"os"
|
||||
"sort"
|
||||
"strings"
|
||||
|
||||
"github.com/spf13/pflag"
|
||||
)
|
||||
|
||||
// Annotations for Bash completion.
|
||||
const (
|
||||
BashCompFilenameExt = "cobra_annotation_bash_completion_filename_extensions"
|
||||
BashCompCustom = "cobra_annotation_bash_completion_custom"
|
||||
BashCompOneRequiredFlag = "cobra_annotation_bash_completion_one_required_flag"
|
||||
BashCompSubdirsInDir = "cobra_annotation_bash_completion_subdirs_in_dir"
|
||||
)
|
||||
|
||||
func writePreamble(buf *bytes.Buffer, name string) {
|
||||
buf.WriteString(fmt.Sprintf("# bash completion for %-36s -*- shell-script -*-\n", name))
|
||||
buf.WriteString(fmt.Sprintf(`
|
||||
__%[1]s_debug()
|
||||
{
|
||||
if [[ -n ${BASH_COMP_DEBUG_FILE} ]]; then
|
||||
echo "$*" >> "${BASH_COMP_DEBUG_FILE}"
|
||||
fi
|
||||
}
|
||||
|
||||
# Homebrew on Macs have version 1.3 of bash-completion which doesn't include
|
||||
# _init_completion. This is a very minimal version of that function.
|
||||
__%[1]s_init_completion()
|
||||
{
|
||||
COMPREPLY=()
|
||||
_get_comp_words_by_ref "$@" cur prev words cword
|
||||
}
|
||||
|
||||
__%[1]s_index_of_word()
|
||||
{
|
||||
local w word=$1
|
||||
shift
|
||||
index=0
|
||||
for w in "$@"; do
|
||||
[[ $w = "$word" ]] && return
|
||||
index=$((index+1))
|
||||
done
|
||||
index=-1
|
||||
}
|
||||
|
||||
__%[1]s_contains_word()
|
||||
{
|
||||
local w word=$1; shift
|
||||
for w in "$@"; do
|
||||
[[ $w = "$word" ]] && return
|
||||
done
|
||||
return 1
|
||||
}
|
||||
|
||||
__%[1]s_handle_reply()
|
||||
{
|
||||
__%[1]s_debug "${FUNCNAME[0]}"
|
||||
case $cur in
|
||||
-*)
|
||||
if [[ $(type -t compopt) = "builtin" ]]; then
|
||||
compopt -o nospace
|
||||
fi
|
||||
local allflags
|
||||
if [ ${#must_have_one_flag[@]} -ne 0 ]; then
|
||||
allflags=("${must_have_one_flag[@]}")
|
||||
else
|
||||
allflags=("${flags[*]} ${two_word_flags[*]}")
|
||||
fi
|
||||
COMPREPLY=( $(compgen -W "${allflags[*]}" -- "$cur") )
|
||||
if [[ $(type -t compopt) = "builtin" ]]; then
|
||||
[[ "${COMPREPLY[0]}" == *= ]] || compopt +o nospace
|
||||
fi
|
||||
|
||||
# complete after --flag=abc
|
||||
if [[ $cur == *=* ]]; then
|
||||
if [[ $(type -t compopt) = "builtin" ]]; then
|
||||
compopt +o nospace
|
||||
fi
|
||||
|
||||
local index flag
|
||||
flag="${cur%%=*}"
|
||||
__%[1]s_index_of_word "${flag}" "${flags_with_completion[@]}"
|
||||
COMPREPLY=()
|
||||
if [[ ${index} -ge 0 ]]; then
|
||||
PREFIX=""
|
||||
cur="${cur#*=}"
|
||||
${flags_completion[${index}]}
|
||||
if [ -n "${ZSH_VERSION}" ]; then
|
||||
# zsh completion needs --flag= prefix
|
||||
eval "COMPREPLY=( \"\${COMPREPLY[@]/#/${flag}=}\" )"
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
return 0;
|
||||
;;
|
||||
esac
|
||||
|
||||
# check if we are handling a flag with special work handling
|
||||
local index
|
||||
__%[1]s_index_of_word "${prev}" "${flags_with_completion[@]}"
|
||||
if [[ ${index} -ge 0 ]]; then
|
||||
${flags_completion[${index}]}
|
||||
return
|
||||
fi
|
||||
|
||||
# we are parsing a flag and don't have a special handler, no completion
|
||||
if [[ ${cur} != "${words[cword]}" ]]; then
|
||||
return
|
||||
fi
|
||||
|
||||
local completions
|
||||
completions=("${commands[@]}")
|
||||
if [[ ${#must_have_one_noun[@]} -ne 0 ]]; then
|
||||
completions=("${must_have_one_noun[@]}")
|
||||
fi
|
||||
if [[ ${#must_have_one_flag[@]} -ne 0 ]]; then
|
||||
completions+=("${must_have_one_flag[@]}")
|
||||
fi
|
||||
COMPREPLY=( $(compgen -W "${completions[*]}" -- "$cur") )
|
||||
|
||||
if [[ ${#COMPREPLY[@]} -eq 0 && ${#noun_aliases[@]} -gt 0 && ${#must_have_one_noun[@]} -ne 0 ]]; then
|
||||
COMPREPLY=( $(compgen -W "${noun_aliases[*]}" -- "$cur") )
|
||||
fi
|
||||
|
||||
if [[ ${#COMPREPLY[@]} -eq 0 ]]; then
|
||||
declare -F __custom_func >/dev/null && __custom_func
|
||||
fi
|
||||
|
||||
# available in bash-completion >= 2, not always present on macOS
|
||||
if declare -F __ltrim_colon_completions >/dev/null; then
|
||||
__ltrim_colon_completions "$cur"
|
||||
fi
|
||||
|
||||
# If there is only 1 completion and it is a flag with an = it will be completed
|
||||
# but we don't want a space after the =
|
||||
if [[ "${#COMPREPLY[@]}" -eq "1" ]] && [[ $(type -t compopt) = "builtin" ]] && [[ "${COMPREPLY[0]}" == --*= ]]; then
|
||||
compopt -o nospace
|
||||
fi
|
||||
}
|
||||
|
||||
# The arguments should be in the form "ext1|ext2|extn"
|
||||
__%[1]s_handle_filename_extension_flag()
|
||||
{
|
||||
local ext="$1"
|
||||
_filedir "@(${ext})"
|
||||
}
|
||||
|
||||
__%[1]s_handle_subdirs_in_dir_flag()
|
||||
{
|
||||
local dir="$1"
|
||||
pushd "${dir}" >/dev/null 2>&1 && _filedir -d && popd >/dev/null 2>&1
|
||||
}
|
||||
|
||||
__%[1]s_handle_flag()
|
||||
{
|
||||
__%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
|
||||
|
||||
# if a command required a flag, and we found it, unset must_have_one_flag()
|
||||
local flagname=${words[c]}
|
||||
local flagvalue
|
||||
# if the word contained an =
|
||||
if [[ ${words[c]} == *"="* ]]; then
|
||||
flagvalue=${flagname#*=} # take in as flagvalue after the =
|
||||
flagname=${flagname%%=*} # strip everything after the =
|
||||
flagname="${flagname}=" # but put the = back
|
||||
fi
|
||||
__%[1]s_debug "${FUNCNAME[0]}: looking for ${flagname}"
|
||||
if __%[1]s_contains_word "${flagname}" "${must_have_one_flag[@]}"; then
|
||||
must_have_one_flag=()
|
||||
fi
|
||||
|
||||
# if you set a flag which only applies to this command, don't show subcommands
|
||||
if __%[1]s_contains_word "${flagname}" "${local_nonpersistent_flags[@]}"; then
|
||||
commands=()
|
||||
fi
|
||||
|
||||
# keep flag value with flagname as flaghash
|
||||
# flaghash variable is an associative array which is only supported in bash > 3.
|
||||
if [[ -z "${BASH_VERSION}" || "${BASH_VERSINFO[0]}" -gt 3 ]]; then
|
||||
if [ -n "${flagvalue}" ] ; then
|
||||
flaghash[${flagname}]=${flagvalue}
|
||||
elif [ -n "${words[ $((c+1)) ]}" ] ; then
|
||||
flaghash[${flagname}]=${words[ $((c+1)) ]}
|
||||
else
|
||||
flaghash[${flagname}]="true" # pad "true" for bool flag
|
||||
fi
|
||||
fi
|
||||
|
||||
# skip the argument to a two word flag
|
||||
if __%[1]s_contains_word "${words[c]}" "${two_word_flags[@]}"; then
|
||||
c=$((c+1))
|
||||
# if we are looking for a flags value, don't show commands
|
||||
if [[ $c -eq $cword ]]; then
|
||||
commands=()
|
||||
fi
|
||||
fi
|
||||
|
||||
c=$((c+1))
|
||||
|
||||
}
|
||||
|
||||
__%[1]s_handle_noun()
|
||||
{
|
||||
__%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
|
||||
|
||||
if __%[1]s_contains_word "${words[c]}" "${must_have_one_noun[@]}"; then
|
||||
must_have_one_noun=()
|
||||
elif __%[1]s_contains_word "${words[c]}" "${noun_aliases[@]}"; then
|
||||
must_have_one_noun=()
|
||||
fi
|
||||
|
||||
nouns+=("${words[c]}")
|
||||
c=$((c+1))
|
||||
}
|
||||
|
||||
__%[1]s_handle_command()
|
||||
{
|
||||
__%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
|
||||
|
||||
local next_command
|
||||
if [[ -n ${last_command} ]]; then
|
||||
next_command="_${last_command}_${words[c]//:/__}"
|
||||
else
|
||||
if [[ $c -eq 0 ]]; then
|
||||
next_command="_%[1]s_root_command"
|
||||
else
|
||||
next_command="_${words[c]//:/__}"
|
||||
fi
|
||||
fi
|
||||
c=$((c+1))
|
||||
__%[1]s_debug "${FUNCNAME[0]}: looking for ${next_command}"
|
||||
declare -F "$next_command" >/dev/null && $next_command
|
||||
}
|
||||
|
||||
__%[1]s_handle_word()
|
||||
{
|
||||
if [[ $c -ge $cword ]]; then
|
||||
__%[1]s_handle_reply
|
||||
return
|
||||
fi
|
||||
__%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
|
||||
if [[ "${words[c]}" == -* ]]; then
|
||||
__%[1]s_handle_flag
|
||||
elif __%[1]s_contains_word "${words[c]}" "${commands[@]}"; then
|
||||
__%[1]s_handle_command
|
||||
elif [[ $c -eq 0 ]]; then
|
||||
__%[1]s_handle_command
|
||||
elif __%[1]s_contains_word "${words[c]}" "${command_aliases[@]}"; then
|
||||
# aliashash variable is an associative array which is only supported in bash > 3.
|
||||
if [[ -z "${BASH_VERSION}" || "${BASH_VERSINFO[0]}" -gt 3 ]]; then
|
||||
words[c]=${aliashash[${words[c]}]}
|
||||
__%[1]s_handle_command
|
||||
else
|
||||
__%[1]s_handle_noun
|
||||
fi
|
||||
else
|
||||
__%[1]s_handle_noun
|
||||
fi
|
||||
__%[1]s_handle_word
|
||||
}
|
||||
|
||||
`, name))
|
||||
}
|
||||
|
||||
func writePostscript(buf *bytes.Buffer, name string) {
|
||||
name = strings.Replace(name, ":", "__", -1)
|
||||
buf.WriteString(fmt.Sprintf("__start_%s()\n", name))
|
||||
buf.WriteString(fmt.Sprintf(`{
|
||||
local cur prev words cword
|
||||
declare -A flaghash 2>/dev/null || :
|
||||
declare -A aliashash 2>/dev/null || :
|
||||
if declare -F _init_completion >/dev/null 2>&1; then
|
||||
_init_completion -s || return
|
||||
else
|
||||
__%[1]s_init_completion -n "=" || return
|
||||
fi
|
||||
|
||||
local c=0
|
||||
local flags=()
|
||||
local two_word_flags=()
|
||||
local local_nonpersistent_flags=()
|
||||
local flags_with_completion=()
|
||||
local flags_completion=()
|
||||
local commands=("%[1]s")
|
||||
local must_have_one_flag=()
|
||||
local must_have_one_noun=()
|
||||
local last_command
|
||||
local nouns=()
|
||||
|
||||
__%[1]s_handle_word
|
||||
}
|
||||
|
||||
`, name))
|
||||
buf.WriteString(fmt.Sprintf(`if [[ $(type -t compopt) = "builtin" ]]; then
|
||||
complete -o default -F __start_%s %s
|
||||
else
|
||||
complete -o default -o nospace -F __start_%s %s
|
||||
fi
|
||||
|
||||
`, name, name, name, name))
|
||||
buf.WriteString("# ex: ts=4 sw=4 et filetype=sh\n")
|
||||
}
|
||||
|
||||
func writeCommands(buf *bytes.Buffer, cmd *Command) {
|
||||
buf.WriteString(" commands=()\n")
|
||||
for _, c := range cmd.Commands() {
|
||||
if !c.IsAvailableCommand() || c == cmd.helpCommand {
|
||||
continue
|
||||
}
|
||||
buf.WriteString(fmt.Sprintf(" commands+=(%q)\n", c.Name()))
|
||||
writeCmdAliases(buf, c)
|
||||
}
|
||||
buf.WriteString("\n")
|
||||
}
|
||||
|
||||
func writeFlagHandler(buf *bytes.Buffer, name string, annotations map[string][]string, cmd *Command) {
|
||||
for key, value := range annotations {
|
||||
switch key {
|
||||
case BashCompFilenameExt:
|
||||
buf.WriteString(fmt.Sprintf(" flags_with_completion+=(%q)\n", name))
|
||||
|
||||
var ext string
|
||||
if len(value) > 0 {
|
||||
ext = fmt.Sprintf("__%s_handle_filename_extension_flag ", cmd.Root().Name()) + strings.Join(value, "|")
|
||||
} else {
|
||||
ext = "_filedir"
|
||||
}
|
||||
buf.WriteString(fmt.Sprintf(" flags_completion+=(%q)\n", ext))
|
||||
case BashCompCustom:
|
||||
buf.WriteString(fmt.Sprintf(" flags_with_completion+=(%q)\n", name))
|
||||
if len(value) > 0 {
|
||||
handlers := strings.Join(value, "; ")
|
||||
buf.WriteString(fmt.Sprintf(" flags_completion+=(%q)\n", handlers))
|
||||
} else {
|
||||
buf.WriteString(" flags_completion+=(:)\n")
|
||||
}
|
||||
case BashCompSubdirsInDir:
|
||||
buf.WriteString(fmt.Sprintf(" flags_with_completion+=(%q)\n", name))
|
||||
|
||||
var ext string
|
||||
if len(value) == 1 {
|
||||
ext = fmt.Sprintf("__%s_handle_subdirs_in_dir_flag ", cmd.Root().Name()) + value[0]
|
||||
} else {
|
||||
ext = "_filedir -d"
|
||||
}
|
||||
buf.WriteString(fmt.Sprintf(" flags_completion+=(%q)\n", ext))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func writeShortFlag(buf *bytes.Buffer, flag *pflag.Flag, cmd *Command) {
|
||||
name := flag.Shorthand
|
||||
format := " "
|
||||
if len(flag.NoOptDefVal) == 0 {
|
||||
format += "two_word_"
|
||||
}
|
||||
format += "flags+=(\"-%s\")\n"
|
||||
buf.WriteString(fmt.Sprintf(format, name))
|
||||
writeFlagHandler(buf, "-"+name, flag.Annotations, cmd)
|
||||
}
|
||||
|
||||
func writeFlag(buf *bytes.Buffer, flag *pflag.Flag, cmd *Command) {
|
||||
name := flag.Name
|
||||
format := " flags+=(\"--%s"
|
||||
if len(flag.NoOptDefVal) == 0 {
|
||||
format += "="
|
||||
}
|
||||
format += "\")\n"
|
||||
buf.WriteString(fmt.Sprintf(format, name))
|
||||
writeFlagHandler(buf, "--"+name, flag.Annotations, cmd)
|
||||
}
|
||||
|
||||
func writeLocalNonPersistentFlag(buf *bytes.Buffer, flag *pflag.Flag) {
|
||||
name := flag.Name
|
||||
format := " local_nonpersistent_flags+=(\"--%s"
|
||||
if len(flag.NoOptDefVal) == 0 {
|
||||
format += "="
|
||||
}
|
||||
format += "\")\n"
|
||||
buf.WriteString(fmt.Sprintf(format, name))
|
||||
}
|
||||
|
||||
func writeFlags(buf *bytes.Buffer, cmd *Command) {
|
||||
buf.WriteString(` flags=()
|
||||
two_word_flags=()
|
||||
local_nonpersistent_flags=()
|
||||
flags_with_completion=()
|
||||
flags_completion=()
|
||||
|
||||
`)
|
||||
localNonPersistentFlags := cmd.LocalNonPersistentFlags()
|
||||
cmd.NonInheritedFlags().VisitAll(func(flag *pflag.Flag) {
|
||||
if nonCompletableFlag(flag) {
|
||||
return
|
||||
}
|
||||
writeFlag(buf, flag, cmd)
|
||||
if len(flag.Shorthand) > 0 {
|
||||
writeShortFlag(buf, flag, cmd)
|
||||
}
|
||||
if localNonPersistentFlags.Lookup(flag.Name) != nil {
|
||||
writeLocalNonPersistentFlag(buf, flag)
|
||||
}
|
||||
})
|
||||
cmd.InheritedFlags().VisitAll(func(flag *pflag.Flag) {
|
||||
if nonCompletableFlag(flag) {
|
||||
return
|
||||
}
|
||||
writeFlag(buf, flag, cmd)
|
||||
if len(flag.Shorthand) > 0 {
|
||||
writeShortFlag(buf, flag, cmd)
|
||||
}
|
||||
})
|
||||
|
||||
buf.WriteString("\n")
|
||||
}
|
||||
|
||||
func writeRequiredFlag(buf *bytes.Buffer, cmd *Command) {
|
||||
buf.WriteString(" must_have_one_flag=()\n")
|
||||
flags := cmd.NonInheritedFlags()
|
||||
flags.VisitAll(func(flag *pflag.Flag) {
|
||||
if nonCompletableFlag(flag) {
|
||||
return
|
||||
}
|
||||
for key := range flag.Annotations {
|
||||
switch key {
|
||||
case BashCompOneRequiredFlag:
|
||||
format := " must_have_one_flag+=(\"--%s"
|
||||
if flag.Value.Type() != "bool" {
|
||||
format += "="
|
||||
}
|
||||
format += "\")\n"
|
||||
buf.WriteString(fmt.Sprintf(format, flag.Name))
|
||||
|
||||
if len(flag.Shorthand) > 0 {
|
||||
buf.WriteString(fmt.Sprintf(" must_have_one_flag+=(\"-%s\")\n", flag.Shorthand))
|
||||
}
|
||||
}
|
||||
}
|
||||
})
|
||||
}
|
||||
|
||||
func writeRequiredNouns(buf *bytes.Buffer, cmd *Command) {
|
||||
buf.WriteString(" must_have_one_noun=()\n")
|
||||
sort.Sort(sort.StringSlice(cmd.ValidArgs))
|
||||
for _, value := range cmd.ValidArgs {
|
||||
buf.WriteString(fmt.Sprintf(" must_have_one_noun+=(%q)\n", value))
|
||||
}
|
||||
}
|
||||
|
||||
func writeCmdAliases(buf *bytes.Buffer, cmd *Command) {
|
||||
if len(cmd.Aliases) == 0 {
|
||||
return
|
||||
}
|
||||
|
||||
sort.Sort(sort.StringSlice(cmd.Aliases))
|
||||
|
||||
buf.WriteString(fmt.Sprint(` if [[ -z "${BASH_VERSION}" || "${BASH_VERSINFO[0]}" -gt 3 ]]; then`, "\n"))
|
||||
for _, value := range cmd.Aliases {
|
||||
buf.WriteString(fmt.Sprintf(" command_aliases+=(%q)\n", value))
|
||||
buf.WriteString(fmt.Sprintf(" aliashash[%q]=%q\n", value, cmd.Name()))
|
||||
}
|
||||
buf.WriteString(` fi`)
|
||||
buf.WriteString("\n")
|
||||
}
|
||||
func writeArgAliases(buf *bytes.Buffer, cmd *Command) {
|
||||
buf.WriteString(" noun_aliases=()\n")
|
||||
sort.Sort(sort.StringSlice(cmd.ArgAliases))
|
||||
for _, value := range cmd.ArgAliases {
|
||||
buf.WriteString(fmt.Sprintf(" noun_aliases+=(%q)\n", value))
|
||||
}
|
||||
}
|
||||
|
||||
func gen(buf *bytes.Buffer, cmd *Command) {
|
||||
for _, c := range cmd.Commands() {
|
||||
if !c.IsAvailableCommand() || c == cmd.helpCommand {
|
||||
continue
|
||||
}
|
||||
gen(buf, c)
|
||||
}
|
||||
commandName := cmd.CommandPath()
|
||||
commandName = strings.Replace(commandName, " ", "_", -1)
|
||||
commandName = strings.Replace(commandName, ":", "__", -1)
|
||||
|
||||
if cmd.Root() == cmd {
|
||||
buf.WriteString(fmt.Sprintf("_%s_root_command()\n{\n", commandName))
|
||||
} else {
|
||||
buf.WriteString(fmt.Sprintf("_%s()\n{\n", commandName))
|
||||
}
|
||||
|
||||
buf.WriteString(fmt.Sprintf(" last_command=%q\n", commandName))
|
||||
buf.WriteString("\n")
|
||||
buf.WriteString(" command_aliases=()\n")
|
||||
buf.WriteString("\n")
|
||||
|
||||
writeCommands(buf, cmd)
|
||||
writeFlags(buf, cmd)
|
||||
writeRequiredFlag(buf, cmd)
|
||||
writeRequiredNouns(buf, cmd)
|
||||
writeArgAliases(buf, cmd)
|
||||
buf.WriteString("}\n\n")
|
||||
}
|
||||
|
||||
// GenBashCompletion generates bash completion file and writes to the passed writer.
|
||||
func (c *Command) GenBashCompletion(w io.Writer) error {
|
||||
buf := new(bytes.Buffer)
|
||||
writePreamble(buf, c.Name())
|
||||
if len(c.BashCompletionFunction) > 0 {
|
||||
buf.WriteString(c.BashCompletionFunction + "\n")
|
||||
}
|
||||
gen(buf, c)
|
||||
writePostscript(buf, c.Name())
|
||||
|
||||
_, err := buf.WriteTo(w)
|
||||
return err
|
||||
}
|
||||
|
||||
func nonCompletableFlag(flag *pflag.Flag) bool {
|
||||
return flag.Hidden || len(flag.Deprecated) > 0
|
||||
}
|
||||
|
||||
// GenBashCompletionFile generates bash completion file.
|
||||
func (c *Command) GenBashCompletionFile(filename string) error {
|
||||
outFile, err := os.Create(filename)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
defer outFile.Close()
|
||||
|
||||
return c.GenBashCompletion(outFile)
|
||||
}
|
||||
|
||||
// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag if it exists,
|
||||
// and causes your command to report an error if invoked without the flag.
|
||||
func (c *Command) MarkFlagRequired(name string) error {
|
||||
return MarkFlagRequired(c.Flags(), name)
|
||||
}
|
||||
|
||||
// MarkPersistentFlagRequired adds the BashCompOneRequiredFlag annotation to the named persistent flag if it exists,
|
||||
// and causes your command to report an error if invoked without the flag.
|
||||
func (c *Command) MarkPersistentFlagRequired(name string) error {
|
||||
return MarkFlagRequired(c.PersistentFlags(), name)
|
||||
}
|
||||
|
||||
// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag if it exists,
|
||||
// and causes your command to report an error if invoked without the flag.
|
||||
func MarkFlagRequired(flags *pflag.FlagSet, name string) error {
|
||||
return flags.SetAnnotation(name, BashCompOneRequiredFlag, []string{"true"})
|
||||
}
|
||||
|
||||
// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag, if it exists.
|
||||
// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
|
||||
func (c *Command) MarkFlagFilename(name string, extensions ...string) error {
|
||||
return MarkFlagFilename(c.Flags(), name, extensions...)
|
||||
}
|
||||
|
||||
// MarkFlagCustom adds the BashCompCustom annotation to the named flag, if it exists.
|
||||
// Generated bash autocompletion will call the bash function f for the flag.
|
||||
func (c *Command) MarkFlagCustom(name string, f string) error {
|
||||
return MarkFlagCustom(c.Flags(), name, f)
|
||||
}
|
||||
|
||||
// MarkPersistentFlagFilename adds the BashCompFilenameExt annotation to the named persistent flag, if it exists.
|
||||
// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
|
||||
func (c *Command) MarkPersistentFlagFilename(name string, extensions ...string) error {
|
||||
return MarkFlagFilename(c.PersistentFlags(), name, extensions...)
|
||||
}
|
||||
|
||||
// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag in the flag set, if it exists.
|
||||
// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
|
||||
func MarkFlagFilename(flags *pflag.FlagSet, name string, extensions ...string) error {
|
||||
return flags.SetAnnotation(name, BashCompFilenameExt, extensions)
|
||||
}
|
||||
|
||||
// MarkFlagCustom adds the BashCompCustom annotation to the named flag in the flag set, if it exists.
|
||||
// Generated bash autocompletion will call the bash function f for the flag.
|
||||
func MarkFlagCustom(flags *pflag.FlagSet, name string, f string) error {
|
||||
return flags.SetAnnotation(name, BashCompCustom, []string{f})
|
||||
}
|
||||
|
|
@ -0,0 +1,221 @@
|
|||
# Generating Bash Completions For Your Own cobra.Command
|
||||
|
||||
Generating bash completions from a cobra command is incredibly easy. An actual program which does so for the kubernetes kubectl binary is as follows:
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"io/ioutil"
|
||||
"os"
|
||||
|
||||
"k8s.io/kubernetes/pkg/kubectl/cmd"
|
||||
"k8s.io/kubernetes/pkg/kubectl/cmd/util"
|
||||
)
|
||||
|
||||
func main() {
|
||||
kubectl := cmd.NewKubectlCommand(util.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)
|
||||
kubectl.GenBashCompletionFile("out.sh")
|
||||
}
|
||||
```
|
||||
|
||||
`out.sh` will get you completions of subcommands and flags. Copy it to `/etc/bash_completion.d/` as described [here](https://debian-administration.org/article/316/An_introduction_to_bash_completion_part_1) and reset your terminal to use autocompletion. If you make additional annotations to your code, you can get even more intelligent and flexible behavior.
|
||||
|
||||
## Creating your own custom functions
|
||||
|
||||
Some more actual code that works in kubernetes:
|
||||
|
||||
```bash
|
||||
const (
|
||||
bash_completion_func = `__kubectl_parse_get()
|
||||
{
|
||||
local kubectl_output out
|
||||
if kubectl_output=$(kubectl get --no-headers "$1" 2>/dev/null); then
|
||||
out=($(echo "${kubectl_output}" | awk '{print $1}'))
|
||||
COMPREPLY=( $( compgen -W "${out[*]}" -- "$cur" ) )
|
||||
fi
|
||||
}
|
||||
|
||||
__kubectl_get_resource()
|
||||
{
|
||||
if [[ ${#nouns[@]} -eq 0 ]]; then
|
||||
return 1
|
||||
fi
|
||||
__kubectl_parse_get ${nouns[${#nouns[@]} -1]}
|
||||
if [[ $? -eq 0 ]]; then
|
||||
return 0
|
||||
fi
|
||||
}
|
||||
|
||||
__custom_func() {
|
||||
case ${last_command} in
|
||||
kubectl_get | kubectl_describe | kubectl_delete | kubectl_stop)
|
||||
__kubectl_get_resource
|
||||
return
|
||||
;;
|
||||
*)
|
||||
;;
|
||||
esac
|
||||
}
|
||||
`)
|
||||
```
|
||||
|
||||
And then I set that in my command definition:
|
||||
|
||||
```go
|
||||
cmds := &cobra.Command{
|
||||
Use: "kubectl",
|
||||
Short: "kubectl controls the Kubernetes cluster manager",
|
||||
Long: `kubectl controls the Kubernetes cluster manager.
|
||||
|
||||
Find more information at https://github.com/GoogleCloudPlatform/kubernetes.`,
|
||||
Run: runHelp,
|
||||
BashCompletionFunction: bash_completion_func,
|
||||
}
|
||||
```
|
||||
|
||||
The `BashCompletionFunction` option is really only valid/useful on the root command. Doing the above will cause `__custom_func()` to be called when the built in processor was unable to find a solution. In the case of kubernetes a valid command might look something like `kubectl get pod [mypod]`. If you type `kubectl get pod [tab][tab]` the `__customc_func()` will run because the cobra.Command only understood "kubectl" and "get." `__custom_func()` will see that the cobra.Command is "kubectl_get" and will thus call another helper `__kubectl_get_resource()`. `__kubectl_get_resource` will look at the 'nouns' collected. In our example the only noun will be `pod`. So it will call `__kubectl_parse_get pod`. `__kubectl_parse_get` will actually call out to kubernetes and get any pods. It will then set `COMPREPLY` to valid pods!
|
||||
|
||||
## Have the completions code complete your 'nouns'
|
||||
|
||||
In the above example "pod" was assumed to already be typed. But if you want `kubectl get [tab][tab]` to show a list of valid "nouns" you have to set them. Simplified code from `kubectl get` looks like:
|
||||
|
||||
```go
|
||||
validArgs []string = { "pod", "node", "service", "replicationcontroller" }
|
||||
|
||||
cmd := &cobra.Command{
|
||||
Use: "get [(-o|--output=)json|yaml|template|...] (RESOURCE [NAME] | RESOURCE/NAME ...)",
|
||||
Short: "Display one or many resources",
|
||||
Long: get_long,
|
||||
Example: get_example,
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
err := RunGet(f, out, cmd, args)
|
||||
util.CheckErr(err)
|
||||
},
|
||||
ValidArgs: validArgs,
|
||||
}
|
||||
```
|
||||
|
||||
Notice we put the "ValidArgs" on the "get" subcommand. Doing so will give results like
|
||||
|
||||
```bash
|
||||
# kubectl get [tab][tab]
|
||||
node pod replicationcontroller service
|
||||
```
|
||||
|
||||
## Plural form and shortcuts for nouns
|
||||
|
||||
If your nouns have a number of aliases, you can define them alongside `ValidArgs` using `ArgAliases`:
|
||||
|
||||
```go
|
||||
argAliases []string = { "pods", "nodes", "services", "svc", "replicationcontrollers", "rc" }
|
||||
|
||||
cmd := &cobra.Command{
|
||||
...
|
||||
ValidArgs: validArgs,
|
||||
ArgAliases: argAliases
|
||||
}
|
||||
```
|
||||
|
||||
The aliases are not shown to the user on tab completion, but they are accepted as valid nouns by
|
||||
the completion algorithm if entered manually, e.g. in:
|
||||
|
||||
```bash
|
||||
# kubectl get rc [tab][tab]
|
||||
backend frontend database
|
||||
```
|
||||
|
||||
Note that without declaring `rc` as an alias, the completion algorithm would show the list of nouns
|
||||
in this example again instead of the replication controllers.
|
||||
|
||||
## Mark flags as required
|
||||
|
||||
Most of the time completions will only show subcommands. But if a flag is required to make a subcommand work, you probably want it to show up when the user types [tab][tab]. Marking a flag as 'Required' is incredibly easy.
|
||||
|
||||
```go
|
||||
cmd.MarkFlagRequired("pod")
|
||||
cmd.MarkFlagRequired("container")
|
||||
```
|
||||
|
||||
and you'll get something like
|
||||
|
||||
```bash
|
||||
# kubectl exec [tab][tab][tab]
|
||||
-c --container= -p --pod=
|
||||
```
|
||||
|
||||
# Specify valid filename extensions for flags that take a filename
|
||||
|
||||
In this example we use --filename= and expect to get a json or yaml file as the argument. To make this easier we annotate the --filename flag with valid filename extensions.
|
||||
|
||||
```go
|
||||
annotations := []string{"json", "yaml", "yml"}
|
||||
annotation := make(map[string][]string)
|
||||
annotation[cobra.BashCompFilenameExt] = annotations
|
||||
|
||||
flag := &pflag.Flag{
|
||||
Name: "filename",
|
||||
Shorthand: "f",
|
||||
Usage: usage,
|
||||
Value: value,
|
||||
DefValue: value.String(),
|
||||
Annotations: annotation,
|
||||
}
|
||||
cmd.Flags().AddFlag(flag)
|
||||
```
|
||||
|
||||
Now when you run a command with this filename flag you'll get something like
|
||||
|
||||
```bash
|
||||
# kubectl create -f
|
||||
test/ example/ rpmbuild/
|
||||
hello.yml test.json
|
||||
```
|
||||
|
||||
So while there are many other files in the CWD it only shows me subdirs and those with valid extensions.
|
||||
|
||||
# Specify custom flag completion
|
||||
|
||||
Similar to the filename completion and filtering using cobra.BashCompFilenameExt, you can specify
|
||||
a custom flag completion function with cobra.BashCompCustom:
|
||||
|
||||
```go
|
||||
annotation := make(map[string][]string)
|
||||
annotation[cobra.BashCompCustom] = []string{"__kubectl_get_namespaces"}
|
||||
|
||||
flag := &pflag.Flag{
|
||||
Name: "namespace",
|
||||
Usage: usage,
|
||||
Annotations: annotation,
|
||||
}
|
||||
cmd.Flags().AddFlag(flag)
|
||||
```
|
||||
|
||||
In addition add the `__handle_namespace_flag` implementation in the `BashCompletionFunction`
|
||||
value, e.g.:
|
||||
|
||||
```bash
|
||||
__kubectl_get_namespaces()
|
||||
{
|
||||
local template
|
||||
template="{{ range .items }}{{ .metadata.name }} {{ end }}"
|
||||
local kubectl_out
|
||||
if kubectl_out=$(kubectl get -o template --template="${template}" namespace 2>/dev/null); then
|
||||
COMPREPLY=( $( compgen -W "${kubectl_out}[*]" -- "$cur" ) )
|
||||
fi
|
||||
}
|
||||
```
|
||||
# Using bash aliases for commands
|
||||
|
||||
You can also configure the `bash aliases` for the commands and they will also support completions.
|
||||
|
||||
```bash
|
||||
alias aliasname=origcommand
|
||||
complete -o default -F __start_origcommand aliasname
|
||||
|
||||
# and now when you run `aliasname` completion will make
|
||||
# suggestions as it did for `origcommand`.
|
||||
|
||||
$) aliasname <tab><tab>
|
||||
completion firstcommand secondcommand
|
||||
```
|
||||
|
|
@ -0,0 +1,200 @@
|
|||
// Copyright © 2013 Steve Francia <spf@spf13.com>.
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||||
// you may not use this file except in compliance with the License.
|
||||
// You may obtain a copy of the License at
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
// See the License for the specific language governing permissions and
|
||||
// limitations under the License.
|
||||
|
||||
// Commands similar to git, go tools and other modern CLI tools
|
||||
// inspired by go, go-Commander, gh and subcommand
|
||||
|
||||
package cobra
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io"
|
||||
"reflect"
|
||||
"strconv"
|
||||
"strings"
|
||||
"text/template"
|
||||
"unicode"
|
||||
)
|
||||
|
||||
var templateFuncs = template.FuncMap{
|
||||
"trim": strings.TrimSpace,
|
||||
"trimRightSpace": trimRightSpace,
|
||||
"trimTrailingWhitespaces": trimRightSpace,
|
||||
"appendIfNotPresent": appendIfNotPresent,
|
||||
"rpad": rpad,
|
||||
"gt": Gt,
|
||||
"eq": Eq,
|
||||
}
|
||||
|
||||
var initializers []func()
|
||||
|
||||
// EnablePrefixMatching allows to set automatic prefix matching. Automatic prefix matching can be a dangerous thing
|
||||
// to automatically enable in CLI tools.
|
||||
// Set this to true to enable it.
|
||||
var EnablePrefixMatching = false
|
||||
|
||||
// EnableCommandSorting controls sorting of the slice of commands, which is turned on by default.
|
||||
// To disable sorting, set it to false.
|
||||
var EnableCommandSorting = true
|
||||
|
||||
// MousetrapHelpText enables an information splash screen on Windows
|
||||
// if the CLI is started from explorer.exe.
|
||||
// To disable the mousetrap, just set this variable to blank string ("").
|
||||
// Works only on Microsoft Windows.
|
||||
var MousetrapHelpText string = `This is a command line tool.
|
||||
|
||||
You need to open cmd.exe and run it from there.
|
||||
`
|
||||
|
||||
// AddTemplateFunc adds a template function that's available to Usage and Help
|
||||
// template generation.
|
||||
func AddTemplateFunc(name string, tmplFunc interface{}) {
|
||||
templateFuncs[name] = tmplFunc
|
||||
}
|
||||
|
||||
// AddTemplateFuncs adds multiple template functions that are available to Usage and
|
||||
// Help template generation.
|
||||
func AddTemplateFuncs(tmplFuncs template.FuncMap) {
|
||||
for k, v := range tmplFuncs {
|
||||
templateFuncs[k] = v
|
||||
}
|
||||
}
|
||||
|
||||
// OnInitialize sets the passed functions to be run when each command's
|
||||
// Execute method is called.
|
||||
func OnInitialize(y ...func()) {
|
||||
initializers = append(initializers, y...)
|
||||
}
|
||||
|
||||
// FIXME Gt is unused by cobra and should be removed in a version 2. It exists only for compatibility with users of cobra.
|
||||
|
||||
// Gt takes two types and checks whether the first type is greater than the second. In case of types Arrays, Chans,
|
||||
// Maps and Slices, Gt will compare their lengths. Ints are compared directly while strings are first parsed as
|
||||
// ints and then compared.
|
||||
func Gt(a interface{}, b interface{}) bool {
|
||||
var left, right int64
|
||||
av := reflect.ValueOf(a)
|
||||
|
||||
switch av.Kind() {
|
||||
case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
|
||||
left = int64(av.Len())
|
||||
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
||||
left = av.Int()
|
||||
case reflect.String:
|
||||
left, _ = strconv.ParseInt(av.String(), 10, 64)
|
||||
}
|
||||
|
||||
bv := reflect.ValueOf(b)
|
||||
|
||||
switch bv.Kind() {
|
||||
case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
|
||||
right = int64(bv.Len())
|
||||
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
||||
right = bv.Int()
|
||||
case reflect.String:
|
||||
right, _ = strconv.ParseInt(bv.String(), 10, 64)
|
||||
}
|
||||
|
||||
return left > right
|
||||
}
|
||||
|
||||
// FIXME Eq is unused by cobra and should be removed in a version 2. It exists only for compatibility with users of cobra.
|
||||
|
||||
// Eq takes two types and checks whether they are equal. Supported types are int and string. Unsupported types will panic.
|
||||
func Eq(a interface{}, b interface{}) bool {
|
||||
av := reflect.ValueOf(a)
|
||||
bv := reflect.ValueOf(b)
|
||||
|
||||
switch av.Kind() {
|
||||
case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
|
||||
panic("Eq called on unsupported type")
|
||||
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
||||
return av.Int() == bv.Int()
|
||||
case reflect.String:
|
||||
return av.String() == bv.String()
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func trimRightSpace(s string) string {
|
||||
return strings.TrimRightFunc(s, unicode.IsSpace)
|
||||
}
|
||||
|
||||
// FIXME appendIfNotPresent is unused by cobra and should be removed in a version 2. It exists only for compatibility with users of cobra.
|
||||
|
||||
// appendIfNotPresent will append stringToAppend to the end of s, but only if it's not yet present in s.
|
||||
func appendIfNotPresent(s, stringToAppend string) string {
|
||||
if strings.Contains(s, stringToAppend) {
|
||||
return s
|
||||
}
|
||||
return s + " " + stringToAppend
|
||||
}
|
||||
|
||||
// rpad adds padding to the right of a string.
|
||||
func rpad(s string, padding int) string {
|
||||
template := fmt.Sprintf("%%-%ds", padding)
|
||||
return fmt.Sprintf(template, s)
|
||||
}
|
||||
|
||||
// tmpl executes the given template text on data, writing the result to w.
|
||||
func tmpl(w io.Writer, text string, data interface{}) error {
|
||||
t := template.New("top")
|
||||
t.Funcs(templateFuncs)
|
||||
template.Must(t.Parse(text))
|
||||
return t.Execute(w, data)
|
||||
}
|
||||
|
||||
// ld compares two strings and returns the levenshtein distance between them.
|
||||
func ld(s, t string, ignoreCase bool) int {
|
||||
if ignoreCase {
|
||||
s = strings.ToLower(s)
|
||||
t = strings.ToLower(t)
|
||||
}
|
||||
d := make([][]int, len(s)+1)
|
||||
for i := range d {
|
||||
d[i] = make([]int, len(t)+1)
|
||||
}
|
||||
for i := range d {
|
||||
d[i][0] = i
|
||||
}
|
||||
for j := range d[0] {
|
||||
d[0][j] = j
|
||||
}
|
||||
for j := 1; j <= len(t); j++ {
|
||||
for i := 1; i <= len(s); i++ {
|
||||
if s[i-1] == t[j-1] {
|
||||
d[i][j] = d[i-1][j-1]
|
||||
} else {
|
||||
min := d[i-1][j]
|
||||
if d[i][j-1] < min {
|
||||
min = d[i][j-1]
|
||||
}
|
||||
if d[i-1][j-1] < min {
|
||||
min = d[i-1][j-1]
|
||||
}
|
||||
d[i][j] = min + 1
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
return d[len(s)][len(t)]
|
||||
}
|
||||
|
||||
func stringInSlice(a string, list []string) bool {
|
||||
for _, b := range list {
|
||||
if b == a {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,5 @@
|
|||
// +build !windows
|
||||
|
||||
package cobra
|
||||
|
||||
var preExecHookFn func(*Command)
|
||||
|
|
@ -0,0 +1,20 @@
|
|||
// +build windows
|
||||
|
||||
package cobra
|
||||
|
||||
import (
|
||||
"os"
|
||||
"time"
|
||||
|
||||
"github.com/inconshreveable/mousetrap"
|
||||
)
|
||||
|
||||
var preExecHookFn = preExecHook
|
||||
|
||||
func preExecHook(c *Command) {
|
||||
if MousetrapHelpText != "" && mousetrap.StartedByExplorer() {
|
||||
c.Print(MousetrapHelpText)
|
||||
time.Sleep(5 * time.Second)
|
||||
os.Exit(1)
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,126 @@
|
|||
package cobra
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
"io"
|
||||
"os"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// GenZshCompletionFile generates zsh completion file.
|
||||
func (c *Command) GenZshCompletionFile(filename string) error {
|
||||
outFile, err := os.Create(filename)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
defer outFile.Close()
|
||||
|
||||
return c.GenZshCompletion(outFile)
|
||||
}
|
||||
|
||||
// GenZshCompletion generates a zsh completion file and writes to the passed writer.
|
||||
func (c *Command) GenZshCompletion(w io.Writer) error {
|
||||
buf := new(bytes.Buffer)
|
||||
|
||||
writeHeader(buf, c)
|
||||
maxDepth := maxDepth(c)
|
||||
writeLevelMapping(buf, maxDepth)
|
||||
writeLevelCases(buf, maxDepth, c)
|
||||
|
||||
_, err := buf.WriteTo(w)
|
||||
return err
|
||||
}
|
||||
|
||||
func writeHeader(w io.Writer, cmd *Command) {
|
||||
fmt.Fprintf(w, "#compdef %s\n\n", cmd.Name())
|
||||
}
|
||||
|
||||
func maxDepth(c *Command) int {
|
||||
if len(c.Commands()) == 0 {
|
||||
return 0
|
||||
}
|
||||
maxDepthSub := 0
|
||||
for _, s := range c.Commands() {
|
||||
subDepth := maxDepth(s)
|
||||
if subDepth > maxDepthSub {
|
||||
maxDepthSub = subDepth
|
||||
}
|
||||
}
|
||||
return 1 + maxDepthSub
|
||||
}
|
||||
|
||||
func writeLevelMapping(w io.Writer, numLevels int) {
|
||||
fmt.Fprintln(w, `_arguments \`)
|
||||
for i := 1; i <= numLevels; i++ {
|
||||
fmt.Fprintf(w, ` '%d: :->level%d' \`, i, i)
|
||||
fmt.Fprintln(w)
|
||||
}
|
||||
fmt.Fprintf(w, ` '%d: :%s'`, numLevels+1, "_files")
|
||||
fmt.Fprintln(w)
|
||||
}
|
||||
|
||||
func writeLevelCases(w io.Writer, maxDepth int, root *Command) {
|
||||
fmt.Fprintln(w, "case $state in")
|
||||
defer fmt.Fprintln(w, "esac")
|
||||
|
||||
for i := 1; i <= maxDepth; i++ {
|
||||
fmt.Fprintf(w, " level%d)\n", i)
|
||||
writeLevel(w, root, i)
|
||||
fmt.Fprintln(w, " ;;")
|
||||
}
|
||||
fmt.Fprintln(w, " *)")
|
||||
fmt.Fprintln(w, " _arguments '*: :_files'")
|
||||
fmt.Fprintln(w, " ;;")
|
||||
}
|
||||
|
||||
func writeLevel(w io.Writer, root *Command, i int) {
|
||||
fmt.Fprintf(w, " case $words[%d] in\n", i)
|
||||
defer fmt.Fprintln(w, " esac")
|
||||
|
||||
commands := filterByLevel(root, i)
|
||||
byParent := groupByParent(commands)
|
||||
|
||||
for p, c := range byParent {
|
||||
names := names(c)
|
||||
fmt.Fprintf(w, " %s)\n", p)
|
||||
fmt.Fprintf(w, " _arguments '%d: :(%s)'\n", i, strings.Join(names, " "))
|
||||
fmt.Fprintln(w, " ;;")
|
||||
}
|
||||
fmt.Fprintln(w, " *)")
|
||||
fmt.Fprintln(w, " _arguments '*: :_files'")
|
||||
fmt.Fprintln(w, " ;;")
|
||||
|
||||
}
|
||||
|
||||
func filterByLevel(c *Command, l int) []*Command {
|
||||
cs := make([]*Command, 0)
|
||||
if l == 0 {
|
||||
cs = append(cs, c)
|
||||
return cs
|
||||
}
|
||||
for _, s := range c.Commands() {
|
||||
cs = append(cs, filterByLevel(s, l-1)...)
|
||||
}
|
||||
return cs
|
||||
}
|
||||
|
||||
func groupByParent(commands []*Command) map[string][]*Command {
|
||||
m := make(map[string][]*Command)
|
||||
for _, c := range commands {
|
||||
parent := c.Parent()
|
||||
if parent == nil {
|
||||
continue
|
||||
}
|
||||
m[parent.Name()] = append(m[parent.Name()], c)
|
||||
}
|
||||
return m
|
||||
}
|
||||
|
||||
func names(commands []*Command) []string {
|
||||
ns := make([]string, len(commands))
|
||||
for i, c := range commands {
|
||||
ns[i] = c.Name()
|
||||
}
|
||||
return ns
|
||||
}
|
||||
|
|
@ -74,6 +74,8 @@ github.com/hashicorp/hcl/json/scanner
|
|||
github.com/hashicorp/hcl/json/token
|
||||
# github.com/imdario/mergo v0.3.6
|
||||
github.com/imdario/mergo
|
||||
# github.com/inconshreveable/mousetrap v1.0.0
|
||||
github.com/inconshreveable/mousetrap
|
||||
# github.com/jgautheron/goconst v0.0.0-20170703170152-9740945f5dcb
|
||||
github.com/jgautheron/goconst/cmd/goconst
|
||||
github.com/jgautheron/goconst
|
||||
|
|
@ -132,6 +134,8 @@ github.com/spf13/afero
|
|||
github.com/spf13/afero/mem
|
||||
# github.com/spf13/cast v1.2.0
|
||||
github.com/spf13/cast
|
||||
# github.com/spf13/cobra v0.0.3
|
||||
github.com/spf13/cobra
|
||||
# github.com/spf13/jwalterweatherman v1.0.0
|
||||
github.com/spf13/jwalterweatherman
|
||||
# github.com/spf13/pflag v1.0.2
|
||||
|
|
|
|||
Loading…
Reference in New Issue