simplify path parsing by making at string instead of an array + add tests

command/build.go

@@ -56,7 +56,7 @@ type Config struct {
 	Color, Debug, Force, Timestamp bool
 	ParallelBuilds                 int64
 	OnError                        string
-	Args                           []string
+	Path                           string
 }
 
 func (c *BuildCommand) ParseArgs(args []string) (Config, int) {
@@ -83,11 +83,12 @@ func (c *BuildCommand) ParseArgs(args []string) (Config, int) {
 		cfg.ParallelBuilds = math.MaxInt64
 	}
 
-	cfg.Args = flags.Args()
-	if len(cfg.Args) != 1 {
+	args = flags.Args()
+	if len(args) != 1 {
 		flags.Usage()
 		return cfg, 1
 	}
+	cfg.Path = args[0]
 	return cfg, 0
 }
 
@@ -100,7 +101,7 @@ func (c *BuildCommand) RunContext(buildCtx context.Context, args []string) int {
 	// Parse the template
 	var tpl *template.Template
 	var err error
-	tpl, err = template.ParseFile(cfg.Args[0])
+	tpl, err = template.ParseFile(cfg.Path)
 	if err != nil {
 		c.Ui.Error(fmt.Sprintf("Failed to parse template: %s", err))
 		return 1

command/build_test.go

@@ -231,7 +231,7 @@ func TestBuildCommand_ParseArgs(t *testing.T) {
 		{fields{defaultMeta},
 			args{[]string{"file.json"}},
 			Config{
-				Args:           []string{"file.json"},
+				Path:           "file.json",
 				ParallelBuilds: math.MaxInt64,
 				Color:          true,
 			},
@@ -240,7 +240,7 @@ func TestBuildCommand_ParseArgs(t *testing.T) {
 		{fields{defaultMeta},
 			args{[]string{"-parallel=true", "file.json"}},
 			Config{
-				Args:           []string{"file.json"},
+				Path:           "file.json",
 				ParallelBuilds: math.MaxInt64,
 				Color:          true,
 			},
@@ -249,7 +249,7 @@ func TestBuildCommand_ParseArgs(t *testing.T) {
 		{fields{defaultMeta},
 			args{[]string{"-parallel=false", "file.json"}},
 			Config{
-				Args:           []string{"file.json"},
+				Path:           "file.json",
 				ParallelBuilds: 1,
 				Color:          true,
 			},
@@ -258,7 +258,16 @@ func TestBuildCommand_ParseArgs(t *testing.T) {
 		{fields{defaultMeta},
 			args{[]string{"-parallel-builds=5", "file.json"}},
 			Config{
-				Args:           []string{"file.json"},
+				Path:           "file.json",
+				ParallelBuilds: 5,
+				Color:          true,
+			},
+			0,
+		},
+		{fields{defaultMeta},
+			args{[]string{"-parallel=false", "-parallel-builds=5", "otherfile.json"}},
+			Config{
+				Path:           "otherfile.json",
 				ParallelBuilds: 5,
 				Color:          true,
 			},