forked from vikunja/vikunja
konrad
d28f005552
Fix limit for databases other than sqlite go mod tidy && go mod vendor Remove unneeded break statements Make everything work with the new xorm version Fix xorm logging Fix lint Fix redis init Fix using id field Fix database init for testing Change default database log level Add xorm logger Use const for postgres go mod tidy Merge branch 'master' into update/xorm # Conflicts: # go.mod # go.sum # vendor/modules.txt go mod vendor Fix loading fixtures for postgres Go mod vendor1 Update xorm to version 1 Co-authored-by: kolaente <k@knt.li> Reviewed-on: vikunja/api#323
131 lines
5.9 KiB
Markdown
131 lines
5.9 KiB
Markdown
# File system notifications for Go
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[](https://godoc.org/github.com/fsnotify/fsnotify) [](https://goreportcard.com/report/github.com/fsnotify/fsnotify)
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fsnotify utilizes [golang.org/x/sys](https://godoc.org/golang.org/x/sys) rather than `syscall` from the standard library. Ensure you have the latest version installed by running:
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```console
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go get -u golang.org/x/sys/...
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```
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Cross platform: Windows, Linux, BSD and macOS.
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| Adapter | OS | Status |
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| --------------------- | -------------------------------- | ------------------------------------------------------------------------------------------------------------------------------- |
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| inotify | Linux 2.6.27 or later, Android\* | Supported [](https://travis-ci.org/fsnotify/fsnotify) |
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| kqueue | BSD, macOS, iOS\* | Supported [](https://travis-ci.org/fsnotify/fsnotify) |
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| ReadDirectoryChangesW | Windows | Supported [](https://travis-ci.org/fsnotify/fsnotify) |
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| FSEvents | macOS | [Planned](https://github.com/fsnotify/fsnotify/issues/11) |
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| FEN | Solaris 11 | [In Progress](https://github.com/fsnotify/fsnotify/issues/12) |
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| fanotify | Linux 2.6.37+ | [Planned](https://github.com/fsnotify/fsnotify/issues/114) |
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| USN Journals | Windows | [Maybe](https://github.com/fsnotify/fsnotify/issues/53) |
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| Polling | *All* | [Maybe](https://github.com/fsnotify/fsnotify/issues/9) |
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\* Android and iOS are untested.
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Please see [the documentation](https://godoc.org/github.com/fsnotify/fsnotify) and consult the [FAQ](#faq) for usage information.
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## API stability
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fsnotify is a fork of [howeyc/fsnotify](https://godoc.org/github.com/howeyc/fsnotify) with a new API as of v1.0. The API is based on [this design document](http://goo.gl/MrYxyA).
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All [releases](https://github.com/fsnotify/fsnotify/releases) are tagged based on [Semantic Versioning](http://semver.org/). Further API changes are [planned](https://github.com/fsnotify/fsnotify/milestones), and will be tagged with a new major revision number.
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Go 1.6 supports dependencies located in the `vendor/` folder. Unless you are creating a library, it is recommended that you copy fsnotify into `vendor/github.com/fsnotify/fsnotify` within your project, and likewise for `golang.org/x/sys`.
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## Usage
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```go
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package main
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import (
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"log"
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"github.com/fsnotify/fsnotify"
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)
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func main() {
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watcher, err := fsnotify.NewWatcher()
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if err != nil {
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log.Fatal(err)
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}
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defer watcher.Close()
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done := make(chan bool)
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go func() {
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for {
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select {
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case event, ok := <-watcher.Events:
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if !ok {
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return
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}
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log.Println("event:", event)
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if event.Op&fsnotify.Write == fsnotify.Write {
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log.Println("modified file:", event.Name)
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}
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case err, ok := <-watcher.Errors:
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if !ok {
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return
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}
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log.Println("error:", err)
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}
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}
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}()
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err = watcher.Add("/tmp/foo")
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if err != nil {
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log.Fatal(err)
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}
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<-done
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}
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```
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## Contributing
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Please refer to [CONTRIBUTING][] before opening an issue or pull request.
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## Example
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See [example_test.go](https://github.com/fsnotify/fsnotify/blob/master/example_test.go).
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## FAQ
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**When a file is moved to another directory is it still being watched?**
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No (it shouldn't be, unless you are watching where it was moved to).
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**When I watch a directory, are all subdirectories watched as well?**
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No, you must add watches for any directory you want to watch (a recursive watcher is on the roadmap [#18][]).
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**Do I have to watch the Error and Event channels in a separate goroutine?**
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As of now, yes. Looking into making this single-thread friendly (see [howeyc #7][#7])
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**Why am I receiving multiple events for the same file on OS X?**
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Spotlight indexing on OS X can result in multiple events (see [howeyc #62][#62]). A temporary workaround is to add your folder(s) to the *Spotlight Privacy settings* until we have a native FSEvents implementation (see [#11][]).
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**How many files can be watched at once?**
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There are OS-specific limits as to how many watches can be created:
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* Linux: /proc/sys/fs/inotify/max_user_watches contains the limit, reaching this limit results in a "no space left on device" error.
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* BSD / OSX: sysctl variables "kern.maxfiles" and "kern.maxfilesperproc", reaching these limits results in a "too many open files" error.
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**Why don't notifications work with NFS filesystems or filesystem in userspace (FUSE)?**
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fsnotify requires support from underlying OS to work. The current NFS protocol does not provide network level support for file notifications.
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[#62]: https://github.com/howeyc/fsnotify/issues/62
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[#18]: https://github.com/fsnotify/fsnotify/issues/18
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[#11]: https://github.com/fsnotify/fsnotify/issues/11
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[#7]: https://github.com/howeyc/fsnotify/issues/7
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[contributing]: https://github.com/fsnotify/fsnotify/blob/master/CONTRIBUTING.md
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## Related Projects
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* [notify](https://github.com/rjeczalik/notify)
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* [fsevents](https://github.com/fsnotify/fsevents)
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