Replace version and binlocation strings in nfpm config

.gitignore

@@ -22,3 +22,4 @@ files/
 !pkg/files/
 vikunja-dump*
 vendor/
+os-packages/

magefile.go

@@ -668,7 +668,7 @@ func (Release) Reprepro() {
 	runAndStreamOutput("reprepro_expect", "debian", "includedeb", "strech", RootPath+"/"+Executable+"-"+Version+"_amd64.deb")
 }
 
-func (Release) Packages() {
+func (Release) Packages() error {
 	mg.Deps(initVars)
 	if err := exec.Command("nfpm").Run(); err != nil && strings.Contains(err.Error(), "executable file not found") {
 		fmt.Println("Please manually install nfpm by running")
@@ -676,8 +676,28 @@ func (Release) Packages() {
 		os.Exit(1)
 	}
 
-	runAndStreamOutput("nfpm", "pkg", "--packager", "deb", "--target", "release/deb")
-	runAndStreamOutput("nfpm", "pkg", "--packager", "rpm", "--target", "release/rpm")
+	// Because nfpm does not  support templating, we replace the values in the config file and restore it after running
+	nfpmConfigPath := RootPath + "/nfpm.yaml"
+	nfpmconfig, err := ioutil.ReadFile(nfpmConfigPath)
+	if err != nil {
+		return err
+	}
+
+	fixedConfig := strings.ReplaceAll(string(nfpmconfig), "<version>", VersionNumber)
+	fixedConfig = strings.ReplaceAll(fixedConfig, "<binlocation>", BinLocation)
+	if err := ioutil.WriteFile(nfpmConfigPath, []byte(fixedConfig), 0); err != nil {
+		return err
+	}
+
+	releasePath := RootPath + "/os-packages/"
+	if err := os.MkdirAll(releasePath, 0755); err != nil {
+		return err
+	}
+
+	runAndStreamOutput("nfpm", "pkg", "--packager", "deb", "--target", releasePath)
+	runAndStreamOutput("nfpm", "pkg", "--packager", "rpm", "--target", releasePath)
+
+	return ioutil.WriteFile(nfpmConfigPath, nfpmconfig, 0)
 }
 
 type Dev mg.Namespace