Fix(?) error while building Go module app via docker

internal/cmd/build.go

@@ -25,6 +25,7 @@ func buildCmd() *cobra.Command {
 	cmd.Flags().StringP("profile", "p", "", "profile that used for building app")
 	cmd.Flags().StringSliceP("tags", "t", []string{}, "space-separated list of build tags to satisfied during the build")
 	cmd.Flags().Bool("copy-deps", false, "copy dependencies for app with dynamic linking")
+	cmd.Flags().Bool("skip-vendoring", false, "if uses Go module, skip updating project's vendor")
 
 	return cmd
 }
@@ -38,6 +39,7 @@ func buildHandler(cmd *cobra.Command, args []string) {
 	outputPath, _ := cmd.Flags().GetString("output")
 	profileName, _ := cmd.Flags().GetString("profile")
 	copyDependencies, _ := cmd.Flags().GetBool("copy-deps")
+	skipVendoring, _ := cmd.Flags().GetBool("skip-vendoring")
 
 	// Load config file
 	fmt.Print("Load config file...")
@@ -73,10 +75,11 @@ func buildHandler(cmd *cobra.Command, args []string) {
 	// only, which make it impossible to generate binding code there.
 	// Therefore, as workaround, Qamel in Go module *MUST* be used in
 	// vendor by using `go mod vendor`.
+	vendorDir := fp.Join(projectDir, "vendor", "github.com", "RadhiFadlillah", "qamel")
 	goModFile := fp.Join(projectDir, "go.mod")
 	usesGoModule := fileExists(goModFile)
 
-	if usesGoModule {
+	if usesGoModule && (!dirExists(vendorDir) || !skipVendoring) {
 		fmt.Print("Generating vendor files...")
 
 		cmdModVendor := exec.Command("go", "mod", "vendor")
@@ -91,13 +94,9 @@ func buildHandler(cmd *cobra.Command, args []string) {
 		cGreen.Println("done")
 	}
 
-	// Get Qamel directory, depending on whether vendoring is used
-	qamelDir := fp.Join("github.com", "RadhiFadlillah", "qamel")
-	vendorDir := fp.Join(projectDir, "vendor", qamelDir)
-
-	if dirExists(vendorDir) {
-		qamelDir = vendorDir
-	} else {
+	// If vendor doesn't exist, uses Qamel dir in GOPATH
+	qamelDir := vendorDir
+	if !dirExists(qamelDir) {
 		gopath := os.Getenv("GOPATH")
 		if gopath == "" {
 			gopath = build.Default.GOPATH

internal/cmd/docker.go

@@ -49,6 +49,12 @@ func dockerHandler(cmd *cobra.Command, args []string) {
 		os.Exit(1)
 	}
 
+	// Get gopath
+	gopath := os.Getenv("GOPATH")
+	if gopath == "" {
+		gopath = build.Default.GOPATH
+	}
+
 	// Get project directory from current working dir
 	projectDir, err := os.Getwd()
 	if err != nil {
@@ -64,14 +70,6 @@ func dockerHandler(cmd *cobra.Command, args []string) {
 		os.Exit(1)
 	}
 
-	// Get relative path for project dir from $GOPATH
-	gopath := build.Default.GOPATH
-	projectDir, err = fp.Rel(gopath, projectDir)
-	if err != nil {
-		cRedBold.Println("Failed to get relative path of project dir:", err)
-		os.Exit(1)
-	}
-
 	// Create docker user
 	currentUser, err := user.Current()
 	if err != nil {
@@ -90,23 +88,36 @@ func dockerHandler(cmd *cobra.Command, args []string) {
 
 	// Prepare docker arguments
 	dockerGopath := unixJoinPath("/", "home", "user", "go")
-	dockerProjectDir := unixJoinPath(dockerGopath, projectDir)
+	dockerProjectDir := unixJoinPath(dockerGopath, "src", fp.Base(projectDir))
+
+	dockerBindProject := fmt.Sprintf(`type=bind,src=%s,dst=%s`,
+		projectDir, dockerProjectDir)
 	dockerBindGoSrc := fmt.Sprintf(`type=bind,src=%s,dst=%s`,
 		unixJoinPath(gopath, "src"),
 		unixJoinPath(dockerGopath, "src"))
 	dockerBindGoCache := fmt.Sprintf(`type=bind,src=%s,dst=%s`,
 		unixJoinPath(cacheDir),
 		unixJoinPath("/", "home", "user", ".cache", "go-build"))
 
-	dockerImageName := fmt.Sprintf("radhifadlillah/qamel:%s", target)
 	dockerArgs := []string{"run", "--rm",
 		"--attach", "stdout",
 		"--attach", "stderr",
 		"--user", dockerUser,
 		"--workdir", dockerProjectDir,
+		"--mount", dockerBindProject,
 		"--mount", dockerBindGoSrc,
-		"--mount", dockerBindGoCache,
-		dockerImageName}
+		"--mount", dockerBindGoCache}
+
+	goModFile := fp.Join(projectDir, "go.mod")
+	if fileExists(goModFile) {
+		dockerArgs = append(dockerArgs, "--env", "GO111MODULE=on")
+	}
+
+	dockerImageName := fmt.Sprintf("radhifadlillah/qamel:%s", target)
+	dockerArgs = append(dockerArgs, dockerImageName)
+
+	// Add qamel arguments
+	dockerArgs = append(dockerArgs, "--skip-vendoring")
 
 	if outputPath != "" {
 		dockerArgs = append(dockerArgs, "-o", outputPath)