feat: output git version for troubleshooting (#78)

cmd/vela-git/command.go

@@ -140,3 +140,17 @@ func submoduleCmd() *exec.Cmd {
 		"--init",
 	)
 }
+
+// versionCmd is a helper function to output
+// the client version information.
+func versionCmd() *exec.Cmd {
+	logrus.Trace("creating git version command")
+
+	// variable to store flags for command
+	var flags []string
+
+	// add flag for version git command
+	flags = append(flags, "version")
+
+	return exec.Command("git", flags...)
+}

cmd/vela-git/main.go

@@ -168,7 +168,7 @@ func run(c *cli.Context) error {
 
 	logrus.WithFields(logrus.Fields{
 		"code":     "https://github.com/go-vela/vela-git",
-		"docs":     "https://go-vela.github.io/docs/plugins/registry/git",
+		"docs":     "https://go-vela.github.io/docs/plugins/registry/pipeline/git",
 		"registry": "https://hub.docker.com/r/target/vela-git",
 	}).Info("Vela Git Plugin")
 

cmd/vela-git/plugin.go

@@ -49,6 +49,12 @@ func (p *Plugin) Exec() error {
 		return err
 	}
 
+	// output the git version for troubleshooting
+	err = execCmd(versionCmd())
+	if err != nil {
+		return err
+	}
+
 	// initialize git repo
 	err = execCmd(initCmd())
 	if err != nil {