Added support for setting tag on npm publish

DOCS.md

@@ -11,6 +11,8 @@ The following parameters are used to configure the plugin:
 * **registry** - the registry URL to use (https://registry.npmjs.org by default)
 * **folder** - the folder, relative to the workspace, containing the library
   (uses the workspace directory, by default)
+* **tag** - the tag to use when publishing the package (does not set
+  one by default)
 
 The following secret values can be set to configure the plugin.
 

main.go

@@ -58,6 +58,11 @@ func main() {
 			Name:  "env-file",
 			Usage: "source env file",
 		},
+		cli.StringFlag{
+			Name:   "tag",
+			Usage:  "NPM publish tag",
+			EnvVar: "PLUGIN_TAG",
+		},
 	}
 
 	if err := app.Run(os.Args); err != nil {
@@ -79,6 +84,7 @@ func run(c *cli.Context) error {
 			Registry:   c.String("registry"),
 			Folder:     c.String("folder"),
 			SkipVerify: c.Bool("skip_verify"),
+			Tag:        c.String("tag"),
 		},
 	}
 

plugin.go

@@ -26,6 +26,7 @@ type (
 		Registry   string
 		Folder     string
 		SkipVerify bool
+		Tag        string
 	}
 
 	npmPackage struct {
@@ -81,7 +82,7 @@ func (p Plugin) Exec() error {
 		log.Info("Publishing package")
 
 		// run the publish command
-		return runCommand(publishCommand(), p.Config.Folder)
+		return runCommand(publishCommand(p.Config), p.Config.Folder)
 	}
 
 	return nil
@@ -307,8 +308,12 @@ func packageVersionsCommand(name string) *exec.Cmd {
 }
 
 // publishCommand runs the publish command
-func publishCommand() *exec.Cmd {
-	return exec.Command("npm", "publish")
+func publishCommand(config Config) *exec.Cmd {
+	if len(config.Tag) == 0 {
+		return exec.Command("npm", "publish");
+	} else {
+		return exec.Command("npm", "publish", "--tag", config.Tag);
+	}
 }
 
 // trace writes each command to standard error (preceded by a ‘$ ’) before it