tagging the build fixed the issue

main.go

@@ -38,6 +38,11 @@ func main() {
 			Name:  "env-file",
 			Usage: "source env file",
 		},
+		cli.StringFlag{
+			Name:   "planfile",
+			Usage:  "The absolute path to save the outfile eg: /tmp/myplan.tfout",
+			EnvVar: "PLUGIN_PLANFILE",
+		},
 		cli.StringFlag{
 			Name:   "init_options",
 			Usage:  "options for the init command. See https://www.terraform.io/docs/commands/init.html",
@@ -48,11 +53,6 @@ func main() {
 			Usage:  "The number of concurrent operations as Terraform walks its graph",
 			EnvVar: "PLUGIN_PARALLELISM",
 		},
-		cli.StringFlag{
-			Name:   "plan_path",
-			Usage:  "The absolute path to save the outfile eg: /tmp/myplan.tfout",
-			EnvVar: "PLUGIN_PLAN_PATH",
-		},
 		cli.StringFlag{
 			Name:   "netrc.machine",
 			Usage:  "netrc machine",
@@ -151,7 +151,7 @@ func run(c *cli.Context) error {
 			RoleARN:     c.String("role_arn_to_assume"),
 			RootDir:     c.String("root_dir"),
 			Parallelism: c.Int("parallelism"),
-			PlanPath:    c.String("plan_path"),
+			Planfile:    c.String("planfile"),
 			Targets:     c.StringSlice("targets"),
 			VarFiles:    c.StringSlice("var_files"),
 		},

plugin.go

@@ -28,7 +28,7 @@ type (
 		Cacert      string
 		Sensitive   bool
 		RoleARN     string
-		PlanPath    string
+		Planfile    string
 		RootDir     string
 		Parallelism int
 		Targets     []string
@@ -275,12 +275,9 @@ func tfApply(config Config) *exec.Cmd {
 	if config.InitOptions.LockTimeout != "" {
 		args = append(args, fmt.Sprintf("-lock-timeout=%s", config.InitOptions.LockTimeout))
 	}
-	if config.PlanPath != "" {
-		fmt.Println("--- Setting an outpath---")
-		args = append(args, config.PlanPath)
+	if config.Planfile != "" {
+		args = append(args, config.Planfile)
 	} else {
-		fmt.Println("--- borked ---")
-		fmt.Println(config.PlanPath)
 		args = append(args, "plan.tfout")
 	}
 	return exec.Command(
@@ -319,10 +316,15 @@ func tfPlan(config Config, destroy bool) *exec.Cmd {
 		"plan",
 	}
 
+	logrus.WithFields(logrus.Fields{
+		"Config.Parallelism": config.Parallelism,
+		"Config.Planfile":    config.Planfile,
+	}).Info("Configuration")
+
 	if destroy {
 		args = append(args, "-destroy")
-	} else if config.PlanPath != "" {
-		args = append(args, fmt.Sprintf("-out=%s", config.PlanPath))
+	} else if config.Planfile != "" {
+		args = append(args, fmt.Sprintf("-out=%s", config.Planfile))
 	} else {
 		args = append(args, "-out=plan.tfout")
 	}

plugin_test.go

@@ -45,7 +45,7 @@ func TestPlugin(t *testing.T) {
 				},
 				{
 					"with path",
-					args{config: Config{PlanPath: "/tmp/a.tfout"}},
+					args{config: Config{Planfile: "/tmp/a.tfout"}},
 					exec.Command("terraform", "apply", "/tmp/a.tfout"),
 				},
 				{
@@ -130,7 +130,7 @@ func TestPlugin(t *testing.T) {
 				},
 				{
 					"with path",
-					args{config: Config{PlanPath: "/tmp/a.tfout"}},
+					args{config: Config{Planfile: "/tmp/a.tfout"}},
 					false,
 					exec.Command("terraform", "plan", "-out=/tmp/a.tfout"),
 				},