Automate Eclipse “Yui Compressor…”

Question

Eclipse PDT has this handy built-in Yui Compressor in the context menu for files. But when building a webapp that uses multiple such files,

Answer 1

You can select and "build" js/css resources by configuring and adding an External Tool with a batch (for Windows users).

This makes it possible to minify by just pressing one button. (It is not part of a run configuration.)

Preconditions: - Java has to be installed. - You must download yuicompressor. (Currently the official download page is here: https://github.com/yui/yuicompressor/releases )

Step1: Add "yuicompressor" and "minify.bat" (given below) to your project.

Step2: Configure an External Tool named "Minify" (Go to menu Run -> External Tools -> External Tools Configurations).

Step3: Select the resources (js/css) or the directory that contains them, and click "Minify". The js/css files will be deployed to the sibling "min" directory.

(minify.bat)

@echo off

set target=%1
set yui=%2\WebContent\build\yuicompressor\yuicompressor-2.4.8.jar

:: %1 selected resource
:: %2 current project

:: dir
if exist %target%\ (
  cd /d %target%
  mkdir min 2>nul

  for %%f in (*.js *.css) do (
    echo Minifying "%%~ff"
    java -jar %yui% %%f -o min\%%f
  ) 

  goto end
) 

:: .js/.css
set pathNoExt=0
for /f %%i in ('dir /b %target%') do set pathNoExt=%%~ni

if not %pathNoExt%==0 (
  cd /d %~dp1
  mkdir min 2>nul

  for /f %%f in ('dir /b %pathNoExt%.js %pathNoExt%.css') do (
    echo Minifying "%%~ff"
    java -jar %yui% %%f -o min\%%f
  )
)

:end
echo Minified