GitHub 操作：在 Windows 环境 C\:\\Users\runneradmin\\.m2\repository 上缓存 Maven .m2 存储库：无法统计：没有这样的文件或目录

Question

As the docs state in order to cache the Maven dependencies with GitHub Actions all we have to use is the actions/cache 像这样操作：

steps:
  - uses: actions/checkout@v2
  - name: Set up JDK 1.8
    uses: actions/setup-java@v1
    with:
      java-version: 1.8
  - name: Cache Maven packages
    uses: actions/cache@v2
    with:
      path: ~/.m2
      key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
      restore-keys: ${{ runner.os }}-m2
  - name: Build with Maven
    run: mvn --batch-mode --update-snapshots verify

但是使用 windows-2016 GitHub Actions 环境，这并没有为我们提供工作缓存 - as the logs states:

Post job cleanup.
"C:\Program Files\Git\usr\bin\tar.exe" --posix --use-compress-program "zstd -T0" -cf cache.tzst -P -C D:/a/spring-boot-admin/spring-boot-admin --files-from manifest.txt --force-local
/usr/bin/tar: C\:\Users\runneradmin\.m2\repository: Cannot stat: No such file or directory
/usr/bin/tar: Exiting with failure status due to previous errors
Warning: Tar failed with error: The process 'C:\Program Files\Git\usr\bin\tar.exe' failed with exit code 2

如何解决这个问题？

Answer 1

Maven 存储库的路径似乎未正确初始化。作为 this issue describes the paths are written with \ instead of / which GNU tar expects. The fix was already provided in Dec 2020, so it made it to the version v2.1.4. The last version v2.1.3 was released in November. But sadly there is a bug in pointing the v2 to the latest v2.1.4（正如 GitHub Actions 用户通常预期的那样）。因此，要解决此问题，我们需要像这样明确指定完整的 actions/cache 版本 v2.1.4：

steps:
  - uses: actions/checkout@v2
  - name: Set up JDK 1.8
    uses: actions/setup-java@v1
    with:
      java-version: 1.8
  - name: Cache Maven packages
    uses: actions/cache@v2.1.4
    with:
      path: ~/.m2
      key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
      restore-keys: ${{ runner.os }}-m2
  - name: Build with Maven
    run: mvn --batch-mode --update-snapshots verify

现在它应该很有魅力了 (see logs here)。

GitHub 操作：在 Windows 环境 C\:\\Users\runneradmin\\.m2\repository 上缓存 Maven .m2 存储库：无法统计：没有这样的文件或目录

GitHub Actions: Cache Maven .m2 repository on Windows environment C\:\\Users\runneradmin\\.m2\repository: Cannot stat: No such file or directory

java

windows

caching

maven

github-actions