Alternative npm.cmd for VS201X node tools integration. Caches npm ls -g result until a different npm command is issued.

npm.cmd

:: VS201X alternative for %PROGRAMFILES%\nodejs\npm.cmd
@ECHO OFF

SETLOCAL

SET "NODE_EXE=%~dp0\node.exe"
IF NOT EXIST "%NODE_EXE%" (
  SET "NODE_EXE=node"
)

SET "OUTDIR=%~dp0"
SET "NPM_CLI_JS=%~dp0\node_modules\npm\bin\npm-cli.js"
FOR /F "delims=" %%F IN ('CALL "%NODE_EXE%" "%NPM_CLI_JS%" prefix -g') DO (
  SET "OUTDIR=%%F"
  SET "NPM_PREFIX_NPM_CLI_JS=%%F\node_modules\npm\bin\npm-cli.js"
)
IF EXIST "%NPM_PREFIX_NPM_CLI_JS%" (
  SET "NPM_CLI_JS=%NPM_PREFIX_NPM_CLI_JS%"
)

IF "%1 %2 %3"=="ls -g " (
  IF NOT EXIST "%OUTDIR%\npm.ls-g.cache" (
    "%NODE_EXE%" "%NPM_CLI_JS%" %*>"%OUTDIR%\npm.ls-g.cache"
  )
  FOR /F "tokens=2 delims=:" %%F IN ('CALL CHCP') DO (
    SET "LS-GCHCP=%%F"
  )
  CHCP 65001>nul
  TYPE "%OUTDIR%\npm.ls-g.cache"
  CHCP %LS-GCHCP%>nul
) ELSE (
  ERASE "%OUTDIR%\npm.ls-g.cache" 2>nul
  "%NODE_EXE%" "%NPM_CLI_JS%" %*
)