Basically Functional

internal/cli/helpers.go

@@ -0,0 +1,65 @@
+package cli
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+func PromptWDefault(label, def string) string {
+	ret := Prompt(label, false)
+	if ret == "" {
+		return def
+	}
+	return ret
+}
+
+func Prompt(label string, required bool) string {
+	reader := bufio.NewReader(os.Stdin)
+	var res string
+	fmt.Println(label + ": ")
+	res, _ = reader.ReadString('\n')
+	res = strings.TrimSpace(res)
+	if res == "" && required {
+		fmt.Println("Non-empty response is required")
+		return Prompt(label, required)
+	}
+	return res
+}
+
+func FileExists(path string) bool {
+	info, err := os.Stat(path)
+	if os.IsNotExist(err) {
+		return false
+	}
+	return !info.IsDir()
+}
+
+func DirExists(path string) bool {
+	info, err := os.Stat(path)
+	if os.IsNotExist(err) {
+		return false
+	}
+	return info.IsDir()
+}
+
+func ListFiles(path string) []string {
+	var files []string
+	err := filepath.Walk(path, func(p string, info os.FileInfo, err error) error {
+		p = strings.TrimPrefix(p, path)
+		if p != "" {
+			files = append(files, strings.TrimPrefix(p, "/"))
+		}
+		return nil
+	})
+	if err != nil {
+		return []string{}
+	}
+	return files
+}
+
+func PrintErr(o string) {
+	fmt.Fprintln(os.Stderr, o)
+}