Add option for specify output dir

internal/config/config.go

@@ -7,13 +7,15 @@ type Config struct {
 	Logfile           string `env:"AZTFY_LOGFILE" default:""`
 	Debug             bool   `env:"AZTFY_DEBUG" default:"false"`
 	MockClient        bool   `env:"AZTFY_MOCK_CLIENT" default:"false"`
+	OutputDir         string // specified via flagOutputDir
 }
 
-func NewConfig(rg string) (*Config, error) {
+func NewConfig(rg string, outputDir string) (*Config, error) {
 	var cfg Config
 	if err := babyenv.Parse(&cfg); err != nil {
 		return nil, err
 	}
 	cfg.ResourceGroupName = rg
+	cfg.OutputDir = outputDir
 	return &cfg, nil
 }

internal/meta/meta.go

@@ -16,5 +16,5 @@ func NewMeta(cfg config.Config) (Meta, error) {
 	if cfg.MockClient {
 		return newMetaDummy(cfg.ResourceGroupName)
 	}
-	return newMetaImpl(cfg.ResourceGroupName)
+	return newMetaImpl(cfg.ResourceGroupName, cfg.OutputDir)
 }

internal/meta/meta_impl.go

@@ -32,7 +32,7 @@ type MetaImpl struct {
 	armTemplate    armtemplate.Template
 }
 
-func newMetaImpl(rg string) (Meta, error) {
+func newMetaImpl(rg string, outputDir string) (Meta, error) {
 	ctx := context.TODO()
 
 	// Initialize the workspace
@@ -47,6 +47,15 @@ func newMetaImpl(rg string) (Meta, error) {
 		return nil, fmt.Errorf("creating workspace root %q: %w", rootDir, err)
 	}
 
+	if outputDir != "" {
+		currentWorkingDirectory, err := os.Getwd()
+		if err != nil {
+			return nil, fmt.Errorf("error finding the current working directory: %w", err)
+		}
+
+		rootDir = filepath.Join(currentWorkingDirectory, outputDir)
+	}
+
 	tfDir := filepath.Join(rootDir, "terraform")
 	if err := os.MkdirAll(tfDir, 0755); err != nil {
 		return nil, fmt.Errorf("creating terraform cache dir %q: %w", tfDir, err)

main.go

@@ -12,11 +12,13 @@ import (
 )
 
 var (
-	flagVersion *bool
+	flagVersion   *bool
+	flagOutputDir *string
 )
 
 func init() {
 	flagVersion = flag.Bool("v", false, "Print version")
+	flagOutputDir = flag.String("o", "", "Specify output dir. Default is user cache dir.")
 }
 
 const usage = `aztfy [option] <resource group name>
@@ -39,7 +41,7 @@ func main() {
 		os.Exit(1)
 	}
 
-	cfg, err := config.NewConfig(flag.Args()[0])
+	cfg, err := config.NewConfig(flag.Args()[0], *flagOutputDir)
 	if err != nil {
 		log.Fatal(err)
 	}