Adding crowdin branch support

Signed-off-by: Jonas Franz <info@jonasfranz.de>

main.go

@@ -33,6 +33,17 @@ func main() {
 			EnvVar: "PLUGIN_FILES",
 			Value:  &StringMapFlag{},
 		},
+		cli.StringFlag{
+			Name:   "commit.branch",
+			Value:  "master",
+			Usage:  "git commit branch",
+			EnvVar: "DRONE_COMMIT_BRANCH",
+		},
+		cli.BoolFlag{
+			Name:   "ignore-branch",
+			Usage:  "if true it will not pass the branch to crowdin",
+			EnvVar: "PLUGIN_IGNORE_BRANCH",
+		},
 	}
 	if err := app.Run(os.Args); err != nil {
 		log.Fatal(err)
@@ -47,5 +58,8 @@ func run(c *cli.Context) error {
 			Key:        c.String("project-key"),
 		},
 	}
+	if !c.Bool("ignore-branch") {
+		plugin.Branch = c.String("commit.branch")
+	}
 	return plugin.Exec()
 }

plugin.go

@@ -26,6 +26,7 @@ type (
 	Plugin struct {
 		Config Config
 		Files  Files
+		Branch string
 	}
 )
 
@@ -57,9 +58,13 @@ func (p Plugin) Exec() error {
 		if _, err = io.Copy(part, file); err != nil {
 			return err
 		}
-		if err = writer.Close(); err != nil {
-			return err
-		}
+	}
+	// Adding branch if it is not ignored
+	if p.Branch != "" {
+		writer.WriteField("branch", p.Branch)
+	}
+	if err := writer.Close(); err != nil {
+		return err
 	}
 	var req *http.Request
 	var err error