package utils

import (

"bufio"

"os"

"path/filepath"

"strings"

)

const oopsEntry = ".oops/"

// EnsureGitignore adds .oops/ to .gitignore if it exists and doesn't have the entry

func EnsureGitignore(dir string) error {

gitignorePath := filepath.Join(dir, ".gitignore")

// Check if .gitignore exists

if !FileExists(gitignorePath) {

return nil // No .gitignore, nothing to do

}

// Check if already has .oops/ entry

hasEntry, err := hasGitignoreEntry(gitignorePath, oopsEntry)

if err != nil {

return err

}

if hasEntry {

return nil // Already present

}

// Append .oops/ to .gitignore

f, err := os.OpenFile(gitignorePath, os.O_APPEND|os.O_WRONLY, 0644)

if err != nil {

return err

}

defer f.Close()

// Check if file ends with newline

content, err := os.ReadFile(gitignorePath)

if err != nil {

return err

}

prefix := "\n"

if len(content) == 0 || content[len(content)-1] == '\n' {

prefix = ""

}

_, err = f.WriteString(prefix + oopsEntry + "\n")

return err

}

// hasGitignoreEntry checks if .gitignore contains a specific entry

func hasGitignoreEntry(path, entry string) (bool, error) {

f, err := os.Open(path)

if err != nil {

return false, err

}

defer f.Close()

scanner := bufio.NewScanner(f)

for scanner.Scan() {

line := strings.TrimSpace(scanner.Text())

if line == entry || line == strings.TrimSuffix(entry, "/") {

return true, nil

}

}

return false, scanner.Err()

}