backup_github.cmd

@echo off
:: Switch to UTF-8 to avoid garbled output
chcp 65001 >nul
setlocal EnableExtensions EnableDelayedExpansion

:: ─────────────────────────────────────────────────────────────
:: GitHub Full/Lite Backup (CMD wrapper with confirmation)
:: - Auto-detects mode by presence of GITHUB_TOKEN
::   * FULL: Code+Wiki+Metadata (issues, PRs, releases, ...)
::   * LITE: Code+Wiki only
:: - Asks before overwrite (if backup folder exists)
:: - Usage: backup_github_full.cmd <Git-Repo-URL> [OutDir]
:: ─────────────────────────────────────────────────────────────

if "%~1"=="" (
  echo Usage: %~nx0 Git_Repository_URL [OutDir]
  echo Example: %~nx0 https://github.com/user/repo.git D:\backups
  goto :eof
)

set "REPO_URL=%~1"
set "OUT_DIR=%~2"
if "%OUT_DIR%"=="" set "OUT_DIR=."

:: Check git
where git >nul 2>&1
if errorlevel 1 (
  echo [ERROR] Git is not installed or not found in PATH. Install from https://git-scm.com
  goto :eof
)

:: Extract repo name from URL
set "TMP=%REPO_URL%"
if /i "%TMP:~-4%"==".git" set "TMP=%TMP:~0,-4%"
set "P=%TMP:/=\%"
for %%I in ("%P%") do set "NAME=%%~nI"
if "%NAME%"=="" (
  echo [ERROR] Failed to extract repository name from URL. Check the URL.
  goto :eof
)

for %%I in ("%OUT_DIR%") do set "OUT_DIR_FQ=%%~fI"
set "BACKUP_DIR=%OUT_DIR_FQ%\%NAME%_backup"

:: Decide mode by token
set "MODE=LITE"
if defined GITHUB_TOKEN set "MODE=FULL"

echo --------------------------------------------------
echo Detected mode: %MODE%
if /i "%MODE%"=="FULL" (
  echo This will back up: Code+Wiki+Metadata (issues, PRs, reviews, labels, milestones, releases+assets).
) else (
  echo This will back up: Code+Wiki only (no metadata). You can set GITHUB_TOKEN to enable FULL mode.
)
set /p CONFIRM=Proceed with this mode? [y/N] :
if /i not "%CONFIRM%"=="y" (
  echo Aborted. Nothing was changed.
  goto :eof
)

echo --------------------------------------------------
echo [1/6] Preparing backup folder: %BACKUP_DIR%
echo --------------------------------------------------
if exist "%BACKUP_DIR%" (
  echo The backup folder already exists: "%BACKUP_DIR%"
  set /p OVERWRITE=Do you want to OVERWRITE it? [y/N] :
  if /i not "%OVERWRITE%"=="y" (
    echo Aborted. Nothing was changed.
    goto :eof
  )
  echo Removing existing folder...
  rmdir /s /q "%BACKUP_DIR%"
  if exist "%BACKUP_DIR%" (
    echo [ERROR] Failed to remove the existing folder. Check permissions.
    goto :eof
  )
)
mkdir "%BACKUP_DIR%" 2>nul
if errorlevel 1 (
  echo [ERROR] Failed to create backup folder. Check path/permissions.
  goto :eof
)

pushd "%BACKUP_DIR%" >nul

echo --------------------------------------------------
echo [2/6] Backing up main repository (mirror: all branches/tags)
echo --------------------------------------------------
git clone --mirror "%REPO_URL%" "%NAME%.git"
if errorlevel 1 (
  echo [ERROR] Failed to back up the main repository.
  popd >nul
  goto :eof
)

echo --------------------------------------------------
echo [3/6] Checking for Wiki repository...
echo --------------------------------------------------
set "WIKI_URL=%REPO_URL%"
if /i "%WIKI_URL:~-4%"==".git" (
  set "WIKI_URL=%WIKI_URL:~0,-4%.wiki.git"
) else (
  set "WIKI_URL=%WIKI_URL%.wiki.git"
)
echo Wiki URL: %WIKI_URL%

git ls-remote "%WIKI_URL%" >nul 2>&1
if %errorlevel%==0 (
  echo Wiki repository found. Backing up Wiki...
  git clone --mirror "%WIKI_URL%" "%NAME%.wiki.git"
  if errorlevel 1 (
    echo [WARNING] Failed to back up Wiki repository. Main repository backup succeeded.
  )
) else (
  echo Wiki repository not found or inaccessible. Skipping...
)

popd >nul

if /i "%MODE%"=="FULL" (
  echo --------------------------------------------------
  echo [4/6] Exporting GitHub metadata via PowerShell...
  echo      (issues, issue comments, PRs, PR comments/reviews, labels, milestones, releases+assets)
  echo --------------------------------------------------
  where pwsh >nul 2>&1
  if errorlevel 1 (
    where powershell >nul 2>&1
    if errorlevel 1 (
      echo [ERROR] PowerShell not found. Install PowerShell 7+ or run backup_github_full.ps1 directly.
      goto after_meta
    ) else (
      set "PWSH=powershell"
    )
  ) else (
    set "PWSH=pwsh"
  )
  %PWSH% -NoLogo -NoProfile -ExecutionPolicy Bypass -File "%~dp0backup_github_full.ps1" -RepoUrl "%REPO_URL%" -OutDir "%OUT_DIR%" -MetaOnly -Token "%GITHUB_TOKEN%"
  if errorlevel 1 (
    echo [WARNING] Metadata export returned a non-zero exit code. Code/Wiki backup is available.
  ) else (
    echo Metadata export completed.
  )
) else (
  echo --------------------------------------------------
  echo [4/6] Skipping metadata (Lite mode, no token).
)

:after_meta
echo --------------------------------------------------
echo [5/6] Verifying results
echo      Code: %BACKUP_DIR%\%NAME%.git
if exist "%BACKUP_DIR%\%NAME%.wiki.git" (
  echo      Wiki: %BACKUP_DIR%\%NAME%.wiki.git
) else (
  echo      Wiki: (none)
)
if /i "%MODE%"=="FULL" (
  echo      Meta: %BACKUP_DIR%\meta
) else (
  echo      Meta: (skipped)
)
echo --------------------------------------------------
echo [6/6] Backup finished (%MODE% mode).
echo --------------------------------------------------

endlocal