Add support for automatic opencontainer labels

cmd/drone-docker/main.go

@@ -192,6 +192,16 @@ func main() {
 			Usage:  "label-schema labels",
 			EnvVar: "PLUGIN_LABEL_SCHEMA",
 		},
+		cli.BoolTFlag{
+			Name:   "auto-label",
+			Usage:  "auto-label true|false",
+			EnvVar: "PLUGIN_AUTO_LABEL",
+		},
+		cli.StringFlag{
+			Name:   "link",
+			Usage:  "link https://example.com/org/repo-name",
+			EnvVar: "PLUGIN_REPO_LINK,DRONE_REPO_LINK",
+		},
 		cli.StringFlag{
 			Name:   "docker.registry",
 			Usage:  "docker registry",
@@ -272,6 +282,8 @@ func run(c *cli.Context) error {
 			Repo:          c.String("repo"),
 			Labels:        c.StringSlice("custom-labels"),
 			LabelSchema:   c.StringSlice("label-schema"),
+			AutoLabel:     c.BoolT("auto-label"),
+			Link:          c.String("link"),
 			NoCache:       c.Bool("no-cache"),
 			AddHost:       c.StringSlice("add-host"),
 			Quiet:         c.Bool("quiet"),

docker.go

@@ -53,7 +53,9 @@ type (
 		Compress      bool     // Docker build compress
 		Repo          string   // Docker build repository
 		LabelSchema   []string // label-schema Label map
+		AutoLabel     bool     // auto-label bool
 		Labels        []string // Label map
+		Link          string   // Git repo link
 		NoCache       bool     // Docker build no-cache
 		AddHost       []string // Docker build add-host
 		Quiet         bool     // Docker build quiet
@@ -252,19 +254,22 @@ func commandBuild(build Build) *exec.Cmd {
 		args = append(args, "--quiet")
 	}
 
+	if build.AutoLabel {
 		labelSchema := []string{
-		"schema-version=1.0",
-		fmt.Sprintf("build-date=%s", time.Now().Format(time.RFC3339)),
-		fmt.Sprintf("vcs-ref=%s", build.Name),
-		fmt.Sprintf("vcs-url=%s", build.Remote),
+			fmt.Sprintf("created=%s", time.Now().Format(time.RFC3339)),
+			fmt.Sprintf("revision=%s", build.Name),
+			fmt.Sprintf("source=%s", build.Remote),
+			fmt.Sprintf("url=%s", build.Link),
 		}
+		labelPrefix := "org.opencontainers.image"
 
 		if len(build.LabelSchema) > 0 {
 			labelSchema = append(labelSchema, build.LabelSchema...)
 		}
 
 		for _, label := range labelSchema {
-		args = append(args, "--label", fmt.Sprintf("org.label-schema.%s", label))
+			args = append(args, "--label", fmt.Sprintf("%s.%s", labelPrefix, label))
+		}
 	}
 
 	if len(build.Labels) > 0 {