add drone repo sync command

Gopkg.toml

@@ -7,7 +7,7 @@
 
 [[constraint]]
   name = "github.com/drone/drone-go"
-  revision = "9b0e0d8b9a0e1ee7e24eb12f3d2f617501a1dcd0"
+  revision = "7f20e6c113d3ffa2af80401c4eba7d510c8fd875"
 
 [[constraint]]
   branch = "master"

drone/repo/repo.go

@@ -14,5 +14,6 @@ var Command = cli.Command{
 		repoRemoveCmd,
 		repoRepairCmd,
 		repoChownCmd,
+		repoSyncCmd,
 	},
 }

drone/repo/repo_sync.go

@@ -0,0 +1,49 @@
+package repo
+
+import (
+	"os"
+	"text/template"
+
+	"github.com/drone/drone-cli/drone/internal"
+	"github.com/urfave/cli"
+)
+
+var repoSyncCmd = cli.Command{
+	Name:      "sync",
+	Usage:     "synchronize the repository list",
+	ArgsUsage: " ",
+	Action:    repoSync,
+	Flags: []cli.Flag{
+		cli.StringFlag{
+			Name:  "format",
+			Usage: "format output",
+			Value: tmplRepoList,
+		},
+	},
+}
+
+func repoSync(c *cli.Context) error {
+	client, err := internal.NewClient(c)
+	if err != nil {
+		return err
+	}
+
+	repos, err := client.RepoListOpts(true, true)
+	if err != nil || len(repos) == 0 {
+		return err
+	}
+
+	tmpl, err := template.New("_").Parse(c.String("format") + "\n")
+	if err != nil {
+		return err
+	}
+
+	org := c.String("org")
+	for _, repo := range repos {
+		if org != "" && org != repo.Owner {
+			continue
+		}
+		tmpl.Execute(os.Stdout, repo)
+	}
+	return nil
+}