Refspec had the source and target branches already. Now they got their dedicated vars

.drone.yml

@@ -6,9 +6,6 @@ pipeline:
   test:
     image: golang:1.12.4
     commands:
-      - echo $CI_COMMIT_REF
-      - echo $CI_COMMIT_REFSPEC
-      - echo $DRONE_BRANCH
       - go test -cover -timeout 30s $(go list ./...)
 
   test_postgres:

cncd/pipeline/pipeline/frontend/metadata.go

@@ -164,15 +164,24 @@ func (m *Metadata) EnvironDrone() map[string]string {
 	var (
 		owner        string
 		name         string
+		sourceBranch string
+		targetBranch string
 
-		parts = strings.Split(m.Repo.Name, "/")
+		repoParts   = strings.Split(m.Repo.Name, "/")
+		branchParts = strings.Split(m.Curr.Commit.Refspec, ":")
 	)
-	if len(parts) == 2 {
-		owner = strings.Split(m.Repo.Name, "/")[0]
-		name = strings.Split(m.Repo.Name, "/")[1]
+	if len(repoParts) == 2 {
+		owner = repoParts[0]
+		name = repoParts[1]
 	} else {
 		name = m.Repo.Name
 	}
+
+	if len(branchParts) == 2 {
+		sourceBranch = branchParts[0]
+		targetBranch = branchParts[1]
+	}
+
 	params := map[string]string{
 		"CI":                         "drone",
 		"DRONE":                      "true",
@@ -205,8 +214,8 @@ func (m *Metadata) EnvironDrone() map[string]string {
 		"DRONE_JOB_NUMBER":           fmt.Sprintf("%d", m.Job.Number),
 		"DRONE_JOB_STARTED":          fmt.Sprintf("%d", m.Curr.Started), // ISSUE: no job started
 		"DRONE_BRANCH":               m.Curr.Commit.Branch,
-		"DRONE_TARGET_BRANCH":        m.Curr.Commit.Branch,
-		"DRONE_SOURCE_BRANCH":        m.Curr.Commit.Branch,
+		"DRONE_SOURCE_BRANCH":        sourceBranch,
+		"DRONE_TARGET_BRANCH":        targetBranch,
 		"DRONE_COMMIT":               m.Curr.Commit.Sha,
 		"DRONE_VERSION":              m.Sys.Version,
 		"DRONE_DEPLOY_TO":            m.Curr.Target,