feat: allow edit in external editor

utils/file.go

@@ -0,0 +1,51 @@
+package utils
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+)
+
+func OpenInEditor(initialContent string, extension string) (string, error) {
+	// Create a temporary file
+	tmpFile, err := os.CreateTemp("", "restman_*."+extension)
+	if err != nil {
+		return "", fmt.Errorf("failed to create temp file: %w", err)
+	}
+	defer func() {
+		tmpFile.Close()
+		os.Remove(tmpFile.Name()) // Clean up temp file
+	}()
+
+	// Write the initial content to the temp file
+	if _, err := tmpFile.Write([]byte(initialContent)); err != nil {
+		return "", fmt.Errorf("failed to write to temp file: %w", err)
+	}
+	if err := tmpFile.Close(); err != nil {
+		return "", fmt.Errorf("failed to close temp file: %w", err)
+	}
+
+	// Determine editor to use
+	editor := os.Getenv("EDITOR")
+	if editor == "" {
+		editor = "vim"
+	}
+
+	// Open the file in the editor
+	cmd := exec.Command(editor, tmpFile.Name())
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	if err := cmd.Run(); err != nil {
+		return "", fmt.Errorf("editor command failed: %w", err)
+	}
+
+	// Read the edited content back from the file using os.ReadFile
+	editedContent, err := os.ReadFile(tmpFile.Name())
+	if err != nil {
+		return "", fmt.Errorf("failed to read temp file: %w", err)
+	}
+
+	return string(editedContent), nil
+}