Ggthjy

The following is my first real attempt at batch scripting, and I'm new to it so I'm not sure whether what I've done is to best practice. The code works, and I'm open to suggestions.

Basically the following code allows someone to download Node.js and npm per project, a requirement we have so that we can run multiple versions of Node and npm at the same time. The script also means that setting up development environments is easier, so there are a few goals this script is trying to achieve.

@ECHO OFF



REM Need to test on Azure DevOps, CruiseControl.NET, etc.

REM Test with spaces in paths...



SETLOCAL



SET "NPM_REGISTRY=https://registry.npmjs.org"

SET "ZIP_DOWNLOAD_URL=https://chocolatey.org/7za.exe"



SET "NODE_EXE_ARCH=x64"

SET "NODE_PACKAGE_VERSION=11.10.0"

SET "NPM_PACKAGE_VERSION=6.8.0"



SET "DOWNLOAD_CACHE_PATH=%temp%NpmScratch"

SET "ZIP_EXE_DOWNLOAD=%DOWNLOAD_CACHE_PATH%7za.exe"



SET "NODE_PACKAGE_PATH=%~dp0."

SET "NODE_MODULES_PATH=%NODE_PACKAGE_PATH%node_modules"

SET "NPM_PACKAGE_PATH=%NODE_MODULES_PATH%npm"



SET "NODE_EXE=%NODE_PACKAGE_PATH%node.exe"

SET "NPM_CLI_JS=%NPM_PACKAGE_PATH%binnpm-cli.js"



SET "DELETE_NODE_MODULES="

SET "DOWNLOAD_NODE="

SET "DOWNLOAD_NPM="



IF NOT EXIST "%NODE_EXE%" (

  SET DOWNLOAD_NODE=1

)



IF NOT EXIST "%NPM_CLI_JS%" (

  SET DELETE_NODE_MODULES=1

  SET DOWNLOAD_NPM=1

)



ECHO DELETE_NODE_MODULES=%DELETE_NODE_MODULES%

ECHO DOWNLOAD_NODE=%DOWNLOAD_NODE%

ECHO DOWNLOAD_NPM=%DOWNLOAD_NPM%



IF DEFINED DELETE_NODE_MODULES (

  CALL :clean_dir %NODE_MODULES_PATH%

)



SET "NODE_PACKAGE_FILENAME=node-win-%NODE_EXE_ARCH%-%NODE_PACKAGE_VERSION%.tgz"

SET "NODE_PACKAGE_DOWNLOAD_PATH=%DOWNLOAD_CACHE_PATH%%NODE_PACKAGE_FILENAME%"

SET "NODE_DOWNLOAD_CACHE_PATH=%DOWNLOAD_CACHE_PATH%nodejs-%NODE_PACKAGE_VERSION%"

SET "NODE_EXE_DOWNLOAD_CACHE_PATH=%NODE_DOWNLOAD_CACHE_PATH%binnode.exe"

IF DEFINED DOWNLOAD_NODE (

  CALL :create_dir %DOWNLOAD_CACHE_PATH%

  IF NOT EXIST "%DOWNLOAD_CACHE_PATH%" (

    ECHO "Cache directory missing"

    EXIT %ERRORLEVEL%

  )



  CALL :download %ZIP_DOWNLOAD_URL% %ZIP_EXE_DOWNLOAD%

  IF NOT EXIST "%ZIP_EXE_DOWNLOAD%" (

    ECHO "Zip download failed"

    EXIT %ERRORLEVEL%

  )



  CALL :download %NPM_REGISTRY%/node-win-%NODE_EXE_ARCH%/-/%NODE_PACKAGE_FILENAME% %NODE_PACKAGE_DOWNLOAD_PATH%

  IF NOT EXIST "%NODE_PACKAGE_DOWNLOAD_PATH%" (

    ECHO "Node.js download failed"

    EXIT %ERRORLEVEL%

  )



  IF NOT EXIST "%NODE_EXE_DOWNLOAD_CACHE_PATH%" (

    CALL :extract_archive %ZIP_EXE_DOWNLOAD% %NODE_PACKAGE_DOWNLOAD_PATH% %DOWNLOAD_CACHE_PATH%

    IF NOT EXIST "%DOWNLOAD_CACHE_PATH%packagebinnode.exe" (

      ECHO "Extracting Node,js package failed"

      EXIT %ERRORLEVEL%

    )



    CALL :delete_dir %NODE_DOWNLOAD_CACHE_PATH%

    IF EXIST "%NODE_DOWNLOAD_CACHE_PATH%" (

      ECHO "Failed to delete %NODE_DOWNLOAD_CACHE_PATH%"

      EXIT %ERRORLEVEL%

    )



    CALL :move %DOWNLOAD_CACHE_PATH%package %NODE_DOWNLOAD_CACHE_PATH%

    IF NOT EXIST "%NODE_EXE_DOWNLOAD_CACHE_PATH%" (

      ECHO "Renaming Node.js package directory failed"

      EXIT %ERRORLEVEL%

    )

  )



  IF NOT EXIST "%NODE_EXE_DOWNLOAD_CACHE_PATH%" (

    ECHO "Cached Node.js package directory missing"

    EXIT %ERRORLEVEL%

  )



  CALL :delete_file %NODE_EXE%

  IF EXIST "%NODE_EXE%" (

    ECHO "Failed to delete %NODE_EXE%"

    EXIT %ERRORLEVEL%

  )



  CALL :copy_file %DOWNLOAD_CACHE_PATH%nodejs-%NODE_PACKAGE_VERSION%binnode.exe %NODE_EXE%

  IF NOT EXIST "%NODE_EXE%" (

    ECHO "Copying Node exe failed"

    EXIT %ERRORLEVEL%

  )

)



SET "NPM_PACKAGE_FILENAME=npm-%NPM_PACKAGE_VERSION%.tgz"

SET "NPM_PACKAGE_DOWNLOAD_PATH=%DOWNLOAD_CACHE_PATH%%NPM_PACKAGE_FILENAME%"

SET "NPM_CLI_JS_DOWNLOAD_CACHE_PATH=%DOWNLOAD_CACHE_PATH%npm-%NPM_PACKAGE_VERSION%binnpm-cli.js"

IF DEFINED DOWNLOAD_NPM (

  CALL :create_dir %DOWNLOAD_CACHE_PATH%

  IF NOT EXIST "%DOWNLOAD_CACHE_PATH%" (

    ECHO "Cache directory missing"

    EXIT %ERRORLEVEL%

  )



  CALL :download %ZIP_DOWNLOAD_URL% %ZIP_EXE_DOWNLOAD%

  IF NOT EXIST "%ZIP_EXE_DOWNLOAD%" (

    ECHO "Zip download failed"

    EXIT %ERRORLEVEL%

  )



  CALL :download %NPM_REGISTRY%/npm/-/%NPM_PACKAGE_FILENAME% %NPM_PACKAGE_DOWNLOAD_PATH%

  IF NOT EXIST "%NPM_PACKAGE_DOWNLOAD_PATH%" (

    ECHO "npm download failed"

    EXIT %ERRORLEVEL%

  )



  CALL :extract_archive %ZIP_EXE_DOWNLOAD% %NPM_PACKAGE_DOWNLOAD_PATH% %NPM_PACKAGE_PATH%..

  IF NOT EXIST "%NODE_MODULES_PATH%packagebinnpm-cli.js" (

    ECHO "Extracting npm package failed"

    EXIT %ERRORLEVEL%

  )



  CALL :delete_dir %NPM_PACKAGE_PATH%

  IF EXIST "%NPM_PACKAGE_PATH%" (

    ECHO "Failed to delete %NPM_PACKAGE_PATH%"

    EXIT %ERRORLEVEL%

  )



  CALL :move %NPM_PACKAGE_PATH%..package %NPM_PACKAGE_PATH%

  IF NOT EXIST "%NPM_PACKAGE_PATH%" (

    ECHO "Renaming npm package directory failed"

    EXIT %ERRORLEVEL%

  )

)



EXIT /B %ERRORLEVEL%



:clean_dir

IF EXIST "%~1" (

  ECHO "Cleaning directory %~1"

  CALL CMD /C "MKDIR %temp%.empty 2>NUL"

  CALL CMD /C "ROBOCOPY %temp%.empty %~1 /MIR >NUL"

)

EXIT /B 0



:delete_file

IF EXIST "%~1" (

  CALL ECHO "Deleting file %~1"

  CALL DEL "%~1"

)

EXIT /B 0



:delete_dir

IF EXIST "%~1" (

  ECHO "Deleting directory %~1"

  CALL :clean_dir "%~1" >NUL

  CALL RMDIR "%~1"

)

EXIT /B 0



:create_dir

IF NOT EXIST "%~1" (

  ECHO "Creating directory %~1"

  CALL MKDIR "%~1"

)

EXIT /B 0



:move

IF NOT EXIST "%~2" (

  ECHO "Moving %~1 to %2"

  CALL MOVE "%~1" "%~2"

)

EXIT /B 0



:copy_file

IF NOT EXIST "%~2" (

  ECHO "Copying %~1 to %~2"

  CALL COPY "%~1" "%~2"

)

EXIT /B 0



:copy_dir

IF NOT EXIST "%~2" (

  ECHO "Copying %~1 to %2"

  CALL robocopy "%~1" "%~2" /E >NUL

)

EXIT /B 0



:download

IF NOT EXIST "%~2" (

  ECHO "Downloading %~1 to %~2"

  CALL bitsadmin.exe /transfer "Download" %~1 "%~2"

)

EXIT /B 0



REM %~1 = %ZIP_EXE_DOWNLOAD%

REM %~2 = %NODE_PACKAGE_DOWNLOAD_PATH%

REM %~3 = %DOWNLOAD_CACHE_PATH%

:extract_archive

  ECHO "Extracting %~2 to %~3"

  CALL CMD /C "%~1 x %~2 -so | %~1 x -aoa -si -ttar -o"%~3""

EXIT /B 0