fix redefined flags

cmd/drone-docker-buildx/config.go

@@ -20,19 +20,6 @@ func settingsFlags(settings *plugin.Settings) []cli.Flag {
 			EnvVars:     []string{"DRONE_REMOTE_URL"},
 			Destination: &settings.Build.Remote,
 		},
-		&cli.StringFlag{
-			Name:        "commit.sha",
-			Usage:       "git commit sha",
-			EnvVars:     []string{"DRONE_COMMIT_SHA"},
-			Value:       "00000000",
-			Destination: &settings.Build.Name,
-		},
-		&cli.StringFlag{
-			Name:        "commit.ref",
-			Usage:       "git commit ref",
-			EnvVars:     []string{"DRONE_COMMIT_REF"},
-			Destination: &settings.Build.Ref,
-		},
 		&cli.StringFlag{
 			Name:        "daemon.mirror",
 			Usage:       "docker daemon registry mirror",
@@ -233,12 +220,6 @@ func settingsFlags(settings *plugin.Settings) []cli.Flag {
 			Value:       true,
 			Destination: &settings.Cleanup,
 		},
-		&cli.StringFlag{
-			Name:        "repo.branch",
-			Usage:       "repository default branch",
-			EnvVars:     []string{"DRONE_REPO_BRANCH"},
-			Destination: &settings.Build.Branch,
-		},
 		&cli.BoolFlag{
 			Name:        "no-cache",
 			Usage:       "do not use cached intermediate containers",

plugin/impl.go

@@ -74,6 +74,13 @@ type Settings struct {
 
 // Validate handles the settings validation of the plugin.
 func (p *Plugin) Validate() error {
+	p.settings.Build.Name = "00000000"
+	if p.pipeline.Commit.SHA != "" {
+		p.settings.Build.Name = p.pipeline.Commit.SHA
+	}
+
+	p.settings.Build.Branch = p.pipeline.Repo.Branch
+	p.settings.Build.Ref = p.pipeline.Commit.Ref
 	p.settings.Daemon.Registry = p.settings.Login.Registry
 
 	if p.settings.Build.TagsAuto {