DependencyReportTask“连接”与多gradle模块

Question

我有一个多模块 gradle 项目。

我正在尝试为每个子项目（实际上是每个所有项目）运行 DependencyReportTask....然后连接到单个文件。

如果我这样做：

allprojects {    
    
    /* create a .txt file for each subproject (and the root project */
    task generateSingleProjectDependencies(type: DependencyReportTask) {
        outputFile = file('singleproject.dependencies.txt')
    }

}


task concatenateAllProjectsDependencyFiles {
    doLast {
        /* create a FileTree with all the subproject .txt files */
        FileTree singleProjectsFileTree = fileTree('.') {
            include 'singleproject.dependencies.txt'
        }
        if (singleProjectsFileTree.empty) {
            println 'singleProjectsFileTree was empty'
        } else {
            copy {
                println 'allprojects.dependencies.txt is being created, how many times did I fire?'
                /* write out the multiple single-file-txts into a master .txt file */
                def outputFileName = "allprojects.dependencies.txt"
                def output = new File(outputFileName)
                output.write('')
                singleProjectsFileTree.each {
                    f -> output << f.text
                }
            }
        }
    }
}

/* use dependsOn to get the sequence correct */
concatenateAllProjectsDependencyFiles.dependsOn generateSingleProjectDependencies

/* now "finalize" the over-all "build" task..with our custom dependency-all task */
build.finalizedBy concatenateAllProjectsDependencyFiles

其中“concatenateAllProjectsDependencyFiles”在“allprojects”之外，我只得到根项目的结果。

（所以这不太对）:(

============

如果我将 concatenateAllProjectsDependencyFiles 移动到“allprojects”内部

allprojects {

    /* create a .txt file for each subproject (and the root project */
    task generateSingleProjectDependencies(type: DependencyReportTask) {
        outputFile = file('singleproject.dependencies.txt')
    }


    task concatenateAllProjectsDependencyFiles {
        doLast {
            /* create a FileTree with all the subproject .txt files */
            FileTree singleProjectsFileTree = fileTree('.') {
                include 'singleproject.dependencies.txt'
            }
            if (singleProjectsFileTree.empty) {
                println 'singleProjectsFileTree was empty'
            } else {
                copy {
                    println 'allprojects.dependencies.txt is being created, how many times did I fire?'
                    /* write out the multiple single-file-txts into a master .txt file */
                    def outputFileName = "allprojects.dependencies.txt"
                    def output = new File(outputFileName)
                    output.write('')
                    singleProjectsFileTree.each {
                        f -> output << f.text
                    }
                }
            }
        }
    }

/* use dependsOn to get the sequence correct */
    concatenateAllProjectsDependencyFiles.dependsOn generateSingleProjectDependencies

/* now "finalize" the over-all "build" task..with our custom dependency-all task */
    build.finalizedBy concatenateAllProjectsDependencyFiles



}

我明白了

allprojects.dependencies.txt is being created, how many times did I fire?

显示 N+1 次（N 表示子项目数加上一个根项目）。

（所以这不太对）:(

这不仅仅是触发 N+1 次，我得到了好坏参半的结果....可能是创建 singleproject.dependencies.txt 的线程竞争条件。

如何让 concatenateAllProjectsDependencyFiles 只触发一次，并“找到”所有子项目的“singleproject.dependencies.txt”文件？

Answer 1

我想通了。这需要一点巫术。

这个答案给出了最重要的提示：

https://discuss.gradle.org/t/task-depends-on-subproject-tasks/15893

我将发布答案（来自上述 gradle.org）以避免 d3adlink 综合症。

Well you could use a little Groovy syntax sugar to make it prettier like so:

task publishAndSayHi {
    subprojects.each { dependsOn("${it.name}:publishToMavenLocal") }
    dependsOn('sayHi')
}
Alternatively, if you don’t want to do this for all subprojects you can just define an Array.

现在，我的“它有效”代码如下。

allprojects {

    /* other stuff here */

    /* define a task that will create a .txt file for each subproject (and the root project) */
    task generateSingleProjectDependencies(type: DependencyReportTask) {
        outputFile = file('singleproject.dependencies.txt')
    }

}

task concatenateAllProjectsDependencyFiles {

    /* call the root project task */
    dependsOn("generateSingleProjectDependencies")

    /* call each subproject generateSingleProjectDependencies manually.  since 'empty-folders' show up in the allproject list, use a "scr" folder exists trick */
    subprojects.findAll { new File(it.projectDir, "src").exists() }.each { dependsOn("${it.path}:generateSingleProjectDependencies") }

    doLast {

        /* create a FileTree with all the subproject .txt files */
        FileTree singleProjectsFileTree = fileTree('.') {
            include '**/singleproject.dependencies.txt'
        }

        println "singleProjectsFileTree print each item START"
        singleProjectsFileTree.each { println "singleProjectsFileTree.each::::::>>>>>>'${it.path}'" }
        println "singleProjectsFileTree print each item END"

        if (singleProjectsFileTree.empty) {
            println 'singleProjectsFileTree was empty'
        } else {

            copy {
                println 'allprojects.dependencies.txt is being created.'
                /* write out the multiple single-file-txts into a master .txt file */
                def outputFileName = "allprojects.dependencies.txt"
                def output = new File(outputFileName)
                output.write('')
                singleProjectsFileTree.each {
                    f -> output << f.text
                }
            }
        }
    }
}


/* now "finalize" the over-all "build" task..with our custom dependency-all task */
build.finalizedBy concatenateAllProjectsDependencyFiles

也许这对将来的某人有帮助。

但现在所有 N+1（子项目数 = N 和一个根模块/项目）都被写出。

关键词

分级 依赖列表报告 根任务依赖于 allprojects 子项目任务 子项目包含空文件夹

其他有用的答案：

How do I concatenate multiple files in Gradle?

How to make tasks execute one after another?

https://discuss.gradle.org/t/i-want-to-copy-the-output-from-gradlew-dependencies-into-a-file-at-build-time/21981

https://github.com/kensipe/gradle-samples/blob/master/dot-report/build.gradle