Gradle：为每个war从现有war中删除一些文件-文件do：unpack,remove/filter,assemble war

Question

我对gradle比较陌生，所以这可能是一个典型的新问题。

在我们的gradle构建中，我们有一组war文件（依赖项），它们都包含一个文件，在构建ear文件之前，我们需要从这些war文件中删除该文件。

- for all war files in a folder,
  - extract war content to a location (using a Copy task & zipTree)
  - re-pack to a new war applying a filter (using War & excludes)

我假设我将创建一个新任务并添加一些“依赖”声明。

task excludeUnwantedFiles(){

    file(directoryWithOriginalWars).eachFile  { file ->
        ???? unpack war, filter, assemble new war file ????
    }
}

ear.dependsOn(excludeUnwantedFiles)
excludeUnwantedFiles.dependsOn(downloadAllOriginalWarsIntoDirectory)

如何创建为每个WAR文件执行的任务？做这件事最好的方法是什么？

有什么办法能让我在一个任务中完成这件事吗？例如。使用zipTree（foobarwithfile.war）作为“from”和“war（foobarwithoutfile.war）”并在两者之间应用筛选器？

感谢Lance Java为您提供解决方案。

正如我在评论中提到的，我面临的问题是war文件在执行时被下载/提取，因此在配置时无法访问以定义新任务。

我的解决办法是使用tarTree（带有过滤器）访问尚未提取的WAR-文件列表。请参阅下面的代码示例：

def warFileSourceTarGz = '...tar.gz'
def nfsLibDir="$buildDir/dependencies/"
def nfsLibDownloadDir="$buildDir/downloadedDependencies/"

// task that downloads & extracts the tar.gz
task fetchNfsDependencies(type: Copy) {               
    from tarTree(warFileSourceTarGz)
    into nfsLibDownloadDir    
}


// loop through all war files inside the tar.gz and
// create a task to remove unwanted libraries for each war
task excludeUnwantedJarsFromWars(dependsOn: fetchNfsDependencies){

    // access the "remote" tar.gz file to get the list of war-files to loop over
    def warFileSource = tarTree(warFileSourceTarGz).matching{ 
            include '*.war'
    }

    // for every war-file, create an exclude-path    
    warFileSource.visit  { nextWarFile ->

        if(nextWarFile.name.endsWith('.war')) {

            String taskName = "excludeUnwantedJarsFrom_${nextWarFile.name.replace('.war', '')}"
            String nextWarFilePath = nfsLibDownloadDir+"/"+nextWarFile.name 

            Zip tweakWarTask = tasks.create(name: taskName, type: Zip, dependsOn: fetchNfsDependencies) {

                from  zipTree(nextWarFilePath)
                destinationDir = file(nfsLibDir)
                archiveName = nextWarFile.name

                // exclude these jars, as they cause classloading problems in our ear deployment.
                exclude  'WEB-INF/lib/jcan-optrace*'
            }       

            // hook into build-process
            ear.dependsOn(tweakWarTask)
        }   
    }
}

ear.dependsOn(excludeUnwantedJarsFromWars)

Answer 1

我会为每个war文件创建一个zip任务，并通过让assemble依赖于所有任务，将所有任务连接到DAG中

FileTree warFiles = fileTree(dir: 'path/to/wars', includes: ['**/*.war'])
warFiles.files.each { File warFile ->
    String taskName = "tweakWar${warFile.name.replace('.war', '')}"
    Zip tweakWarTask = tasks.create(name: taskName, type: Zip) {
        from zipTree(warFile) {
            exclude 'path/to/some/file.xml'
        }
        destinationDir = "$buildDir/tweakedWars"
        archiveName = warFile.name
    }
    // wire the task into the dag
    assemble.dependsOn tweakWarTask 
}