自动JavaScript压缩与PowerShell

试着这样做:

Get-ChildItem c:'NewFolder' -recurse | %{java -jar yuicompressor-x.y.z.jar $_.fullname}

%{..}是foreach-object的别名。从c:'Newfolder(及其子目录)获取一组文件，并将它们作为对象传递给管道中的下一个组件。这部分是一个既不支持管道也不支持对象的外部组件，您可以将它包装在foreach中，并以它可以理解的形式提供文件——文件的全名(其中包括路径)。

这个帖子可能会给你一些答案。你用什么来最小化和压缩JavaScript库?

也就是说，我相信YUI压缩器有一个独立的可执行文件，可以从PowerShell启动。

所以，我想我终于要回馈这个社区了。首先我要说的是，我以前从未使用过Powershell，而且真的不喜欢它。我很高兴bash现在随windows一起发布了。但是，我为一个朋友做了一个有趣的项目，该项目运行在win服务器上，需要编写一些代码，以便在他的。net应用程序的代码部署到他的ec2实例后运行。我知道有十几种更好的方法可以使用真正的构建工具来做到这一点，但是……有时候剧本就是你想要的。希望你们觉得有用。它要求你安装java并拥有闭包jar;您可以尝试使用其他的缩小工具。

我需要在这篇文章中给予Chase Florell信用，让我在正确的方向上开始:如何版本javascript和css文件作为powershell构建过程的一部分?

##################################################################
# minimizeJS.ps1                                                 #
# This file removes all non-minified javascript resources        #
# and then updates all html and aspx pages to point to the       #
# minified js if they are not already.                           #
#                                                                #
# Version 1.0                                                    #
# Usage: minimizeJS.ps1 -debug true|false                        #
##################################################################
param($debug=$true)  #you can remove the =$true to force a user to specify
$maxFiles = Get-ChildItem -Path ./* -Include *.js -Exclude *.min.js, *.min.comp.js -Recurse 
$filesContainingResourceRefs = Get-ChildItem -Path ./* -Include *.html, *.aspx -Recurse 
$fileCollection = New-Object System.Collections.ArrayList
$closureJAR = 'C:'closure'compiler.jar'
$javaLocation = 'C:'Program Files'Java'jre1.8.0_131'bin'java.exe'
#Make sure debug flag is set one way or the other
if (!$debug){
  Write-Host "Debug has not been set.  Please use the -debug true|false argument."
  Exit
}elseif ($debug -eq $true){
  Write-host "Running with debug mode set to $debug."
}elseif ($debug -eq $false){
  Write-host "Running wiht debug mode set to $debug."
}else{
  Write-host "Debug has not been set properly.  Please use the -debug true|false argument."
  Exit
}
#First find everything we have a minified js version of, create an object of their names and paths, and delete the non-min file
Write-Host "Beginning minification of JS files.  Debug is $debug"
foreach ($file in $maxFiles)
    {
        $fileOld = $file.FullName
        $fileNew = $file.FullName.Replace(".js", ".min.js")
        if ($debug -eq $true){
          #Write-Host java -jar $closureJAR --js $fileOld --js_output_file $fileNew
          Write-Host "  ArgList is:  -jar  $closureJAR --js $fileOld --js_output_file $fileNew"
        }else{
            Write-Host "  Minifying: $fileOld"
            Start-Process -FilePath $javaLocation `
             -ArgumentList "-jar $closureJAR --js $fileOld --js_output_file $fileNew" `
             -RedirectStandardOutput '.'console.out' -RedirectStandardError '.'console.err'
        }
    }
Write-Host "End minification of JS files"

#Second find everything we have a minified js version of, create an object of their names and paths, and delete the non-min file
Write-Host "Beginning Removal of files...will display below"
$minFiles = Get-ChildItem -Path ./* -Filter *.min.js -Recurse 
foreach ($file in $minFiles)
    {
        #if ($file.FullName.Replace(".min.js", ".js") exists) {
        $private:nonMinifiedVersionFull = $file.FullName -replace ".min.js", ".js" #.ToString().Replace(".min.js", ".js")
        $private:nonMinifiedVersion = $file -Replace ".min.js", ".js" #.ToString().Replace(".min.js", ".js")
        Write-Host "  Removing: " $private:nonMinifiedVersion
        if ($debug -eq $false) {Remove-Item $private:nonMinifiedVersionFull -ErrorAction SilentlyContinue}
    $temp = New-Object System.Object
    $temp | Add-Member -MemberType NoteProperty -Name "minFileName" -Value $file.ToString()
    $temp | Add-Member -MemberType NoteProperty -Name "minFileFullName" -Value $file.FullName.ToString()
    $temp | Add-Member -MemberType NoteProperty -Name "maxFileName" -Value $private:nonMinifiedVersion.ToString()
    $temp | Add-Member -MemberType NoteProperty -Name "maxFileFullName" -Value $private:nonMinifiedVersionFull.ToString()
    $fileCollection.Add($temp) | Out-Null
    }
Write-Host "End Removal of Files"
if ($debug -eq $true) {
   Write-Host "The fileCollection is:"
   $fileCollection
   }
Write-Host "Beginning update of references to point to minified"
#now go through all the files that could reference them and update the references
foreach ($file2 in $filesContainingResourceRefs)
    {
        $private:file = $file2.FullName
            $fixedContent = [System.IO.File]::ReadAllText($private:file)
            #Now loop through all the min and max files in the collection
           foreach ($line in $fileCollection) {
                    $strFind    = $line.maxFileName.ToString()
                    $strReplace = $line.minFileName.ToString()
                    $fixedContent = $fixedContent.replace($strFind, $strReplace)
            }            
            if ($debug -eq $false) {[System.IO.File]::WriteAllText($private:file, $fixedContent)}

           Write-Host "  Replaced non-minified references in: " $private:file
    }
Write-Host "End update of references to point to minified"