Fix nits with execution

pkg/prompt/scan.go

@@ -152,7 +152,8 @@ func newSlice(name string, choices []string) func() interface{} {
 	}
 }
 
-// New returns a prompt closure when executed asks for user input and returns result.
+// New returns a prompt closure when executed asks for
+// user input and has a default value that returns result.
 func New(name string, defval interface{}) func() interface{} {
 	// TODO use reflect package
 	switch defval := defval.(type) {

pkg/tmplt/configuration.go

@@ -8,6 +8,7 @@ import (
 	"path/filepath"
 
 	"github.com/tmrts/tmplt/pkg/util/exit"
+	"github.com/tmrts/tmplt/pkg/util/osutil"
 )
 
 const (
@@ -34,6 +35,7 @@ func TemplatePath(name string) (string, error) {
 func init() {
 	homeDir := os.Getenv("HOME")
 	if homeDir == "" {
+		// FIXME is this really necessary?
 		exit.Error(fmt.Errorf("environment variable ${HOME} should be set"))
 	}
 
@@ -42,6 +44,17 @@ func init() {
 
 	// Read .config/tmplt/config.json if exists
 	// TODO use defaults if config.json doesn't exist
+	hasConfig, err := osutil.FileExists(Configuration.FilePath)
+	if err != nil {
+		exit.Error(err)
+	}
+
+	if !hasConfig {
+		// TODO report the absence of config.json
+		//tlog.Debug("Couldn't find %s user configuration", ConfigFileName)
+		return
+	}
+
 	buf, err := ioutil.ReadFile(Configuration.FilePath)
 	if err != nil {
 		exit.Error(err)

pkg/util/exit/exit.go

@@ -25,6 +25,12 @@ func Error(err error) {
 	os.Exit(CodeError)
 }
 
+func GoodEnough(fmtStr string, s ...interface{}) {
+	tlog.Debug(fmt.Sprintf(fmtStr, s...))
+
+	os.Exit(CodeOK)
+}
+
 func OK(fmtStr string, s ...interface{}) {
 	tlog.Success(fmt.Sprintf(fmtStr, s...))
 

pkg/util/tlog/log.go

@@ -25,6 +25,7 @@ func coloredPrintMsg(icon string, msg string, iC color.Attribute, mC color.Attri
 		color.New(color.Bold, iC).SprintFunc()(msg))
 }
 
+// TODO add log levels
 func Debug(msg string) {
 	coloredPrintMsg(DebugMark, msg, color.FgYellow, color.FgYellow)
 }