feat: add editor util to handle and launch editors outside of built-in

src/cmd/utils/editor.go

@@ -0,0 +1,107 @@
+package utils
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+
+func HandleEditor() (string, error) {
+	editor := ConfigVar.Settings.Editor
+	if editor == "built-in" {
+		return "", nil
+	}
+
+	if editor == "" || editor == "default" {
+		editor = os.Getenv("EDITOR")
+		if editor == "" {
+			editor = "vim" // default to vim if no editor is set
+		}
+	}
+
+	if _, err := exec.LookPath(editor); err != nil {
+		return "", fmt.Errorf("editor %s not found in PATH", editor)
+	}
+
+
+	output, err := LaunchEditor(editor, "")
+	if err != nil {
+		return "", fmt.Errorf("failed to launch editor %s: %v", editor, err)
+	}
+	return output, nil
+}
+
+func LaunchEditor(editor string, filepath string) (string,error) {
+	// Create a temp file or use an existing file
+	var tempFile *os.File
+	var err error
+
+	switch strings.ToLower(editor) {
+	case "default", "":
+		editor = os.Getenv("EDITOR")
+		if editor == "" {
+			editor = "vim" // default to vim if no editor is set
+		}
+	case "built-in":
+		// fallback to built-in editor
+		return "", nil
+	default:
+		if _, err := exec.LookPath(editor); err != nil {
+			return "", fmt.Errorf("editor %s not found in PATH", editor)
+		}
+	}
+
+	if filepath == "" {
+		tempFile, err = os.CreateTemp("", "cocommit_editor_*.txt")
+		} else {
+			tempFile, err = os.OpenFile(filepath, os.O_RDWR, 0666)
+		}
+		if err != nil {
+			return "", fmt.Errorf("Could not create or open tempfile: %s", err.Error())
+		}
+
+	cmd := exec.Command(editor, tempFile.Name())
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	if err := cmd.Run(); err != nil {
+		return "", fmt.Errorf("error running editor command: %v", err)
+	}
+
+
+	data, err := os.ReadFile(tempFile.Name())
+	if err != nil {
+		return "", fmt.Errorf("error reading temp file: %v", err)
+	}
+
+	message := string(data)
+	if message == "" {
+		return "", fmt.Errorf("commit message is empty")
+	}
+
+	// Clean up the temp file
+	if err := os.Remove(tempFile.Name()); err != nil {
+		return "", fmt.Errorf("error removing temp file: %v", err)
+	}
+	if strings.HasSuffix(message, "\n") {
+		message = strings.TrimSuffix(message, "\n")
+	}
+	if strings.HasSuffix(message, "\r") {
+		message = strings.TrimSuffix(message, "\r")
+	}
+	if strings.TrimSpace(message) == "" {
+		return "", fmt.Errorf("commit message is empty after trimming")
+	}
+	// If the message is too long, truncate it
+	if len(message) > 72 {
+		fmt.Printf("Warning: Commit message is too long (%d characters). It will be truncated to 72 characters.\n", len(message))
+		//TODO: Maybe add the rest to the description of the message?
+		//description := message[72:]
+		message = message[:72]
+	}
+
+	return message, nil
+}