Bazel-如何递归地遍历delete_packages以忽略Maven输出? [英] Bazel- How to recursively glob deleted_packages to ignore maven outputs?

问题描述

我有一个从Maven迁移到Bazel的多模块项目.在迁移期间，人们将需要能够在两个构建系统上工作.

I have a mutli-module project which I'm migrating from Maven to Bazel. During this migration people will need to be able to work on both build systems.

mvn clean install之后，Maven将某些BUILD文件复制到target文件夹中.
当我稍后尝试运行bazel build //...时，它认为各种 target文件夹下的BUILD文件是有效的程序包，并且由于某些不匹配而失败.

After an mvn clean install Maven copies some of the BUILD files into the target folder.
When I later try to run bazel build //... it thinks the BUILD files under the various target folders are valid packages and fails due to some mismatch.

我见过deleted_packages，但是AFAICT要求我指定要删除"的文件夹列表，而我不能对200多个模块执行此操作.
我正在寻找说bazel build //... --deleted_packages=**/target的能力.
支持这个吗? (我的实验表明不是，但我可能是错的).如果不支持，是否有现有的破解方法?

I've seen deleted_packages but AFAICT it requires I specify the list of folders to "delete" while I can't do that for 200+ modules.
I'm looking for the ability to say bazel build //... --deleted_packages=**/target.
Is this supported? (my experimentation says it's not but I might be wrong). If it's not supported is there an existing hack for it?

推荐答案

@Laurent的答案给了我线索，但Bazel不接受相对路径，并且要求我将target下的classes和test-classes文件夹都添加到删除软件包，所以我决定用完整的解决方案进行回答:

@Laurent's answer gave me the lead but Bazel didn't accept relative paths and required I add both classes and test-classes folders under target to delete the package so I decided to answer with the complete solution:

#!/bin/bash
#find all the target folders under the current working dir
target_folders=$(find . -name target -type d)
#find the repo root (currently assuming it's git based)
repo_root=$(git rev-parse --show-toplevel)
repo_root_length=${#repo_root}
#the current bazel package prefix is the PWD minus the repo root and adding a slash
current_bazel_package="/${PWD:repo_root_length}"
deleted_packages=""

for target in $target_folders
    do 
        #cannonicalize the package path
        full_package_path="$current_bazel_package${target:1}"
        classes_full="${full_package_path}/classes"
        test_classes_full="${full_package_path}/test-classes"
        deleted_packages="$deleted_packages,$classes_full,$test_classes_full"
done

#remove the leading comma and call bazel-real with the other args
bazel-real "$@" --deleted_packages=${deleted_packages:1}

此脚本已在tools/bazel下签入，这就是为什么它在末尾调用bazel-real的原因.

This script was checked in under tools/bazel which is why it calls bazel-real at the end.

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