npm warnings cause the action to fail

[novemberborn]

Description:
npm, as run within this action, is emitting warnings due to my .npmrc file. These then fail the action.

Action version:
v2 (not sure how to tell exactly what GHA selected)

Platform:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Tools version:
Node.js ^16.4

Repro steps:
With avajs/ava#2867 I'm configuring lockfile-version=3 in my .npmrc file. The npm version that is installed through the action does not recognize this option.

See this run: https://github.com/avajs/ava/runs/4055643495?check_suite_focus=true

Expected behavior:
The warning is emitted but the action completes successfully.

Actual behavior:
The action fails.

[dmitry-shibanov]

Hello @novemberborn. Thank you for your report. As you described in feature request with adding npm_version for npm 7 support, lokfile-version 3 is only supported by npm 8. You're using built-in caching of the action. The Action calls npm config get cache to get global cache directory, that is why you get warning and error. As temporary workaround I suggest:

• remove .npmrc in the time of the building if it's not necessary.
• remove built-in caching for node and use actions/cache
• You can try to use the action twice

     - uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node-version }}
     - name: Upgrade npm
       run: npm install --global npm@^8.1.2
     - uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node-version }}
         cache: npm

• Add --lockfile-version as configuration option.

[dmitry-shibanov]

Hello @novemberborn. We released a new version of the action to resolve the bug with falling on warning. For now it should work as expected.
I'm going to close the issue. If you have any concerns feel free to ping us.