Lack of steps isn't flagged as an error

[jsoref]

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

1. With this workflow csharp-qltest.yml:

   
   name: "C#: Run QL Tests"

on: push: paths:

• "csharp/**"
• "shared/**"
• .github/actions/fetch-codeql/action.yml
• codeql-workspace.yml branches:
• main
• "rc/*" pull_request: paths:
• "csharp/**"
• "shared/**"
• .github/workflows/csharp-qltest.yml
• .github/actions/fetch-codeql/action.yml
• codeql-workspace.yml branches:
• main
• "rc/*"

defaults: run: working-directory: csharp

jobs: qlupgrade: runs-on: ubuntu-latest steps:

• uses: actions/checkout@v4
• uses: ./.github/actions/fetch-codeql
• name: Check DB upgrade scripts run: | echo >empty.trap codeql dataset import -S ql/lib/upgrades/initial/semmlecode.csharp.dbscheme testdb empty.trap codeql dataset upgrade testdb --additional-packs ql/lib diff -q testdb/semmlecode.csharp.dbscheme ql/lib/semmlecode.csharp.dbscheme

• name: Check DB downgrade scripts run: | echo >empty.trap rm -rf testdb; codeql dataset import -S ql/lib/semmlecode.csharp.dbscheme testdb empty.trap codeql resolve upgrades --format=lines --allow-downgrades --additional-packs downgrades \ --dbscheme=ql/lib/semmlecode.csharp.dbscheme --target-dbscheme=downgrades/initial/semmlecode.csharp.dbscheme | xargs codeql execute upgrades testdb diff -q testdb/semmlecode.csharp.dbscheme downgrades/initial/semmlecode.csharp.dbscheme

  choose-runner: runs-on: ubuntu-latest outputs: mac-12: ${{ vars.use-large-mac-runners-for-speed && 'mac-12-xl' || 'mac-12' }} ubuntu-latest: ${{ vars.use-large-linux-runners-for-speed && 'ubuntu-latest-xl' || 'ubuntu-latest' }} windows-latest: ${{ vars.use-large-win-runners-for-speed && 'windows-latest-xl' || 'windows-latest' }}

  qltest: needs: choose-runner runs-on: ${{ needs.choose-runner.outputs.ubuntu-latest }} strategy: fail-fast: false matrix: slice: ["1/2", "2/2"] steps:

• uses: actions/checkout@v4
• uses: ./csharp/actions/create-extractor-pack
• name: Cache compilation cache id: query-cache uses: ./.github/actions/cache-query-compilation with: key: csharp-qltest-${{ matrix.slice }}
• name: Run QL tests run: | codeql test run --threads=0 --ram 50000 --slice ${{ matrix.slice }} --search-path extractor-pack --check-databases --check-undefined-labels --check-repeated-labels --check-redefined-labels --consistency-queries ql/consistency-queries ql/test --compilation-cache "${{ steps.query-cache.outputs.cache-dir }}" env: GITHUB_TOKEN: ${{ github.token }} unit-tests: strategy: matrix: os: [ubuntu-latest, windows-2019] runs-on: ${{ matrix.os }} steps:
• uses: actions/checkout@v4
• name: Setup dotnet uses: actions/setup-dotnet@v4 with: dotnet-version: 8.0.100
• name: Extractor unit tests run: | dotnet test -p:RuntimeFrameworkVersion=8.0.0 extractor/Semmle.Util.Tests dotnet test -p:RuntimeFrameworkVersion=8.0.0 extractor/Semmle.Extraction.Tests dotnet test -p:RuntimeFrameworkVersion=8.0.0 autobuilder/Semmle.Autobuild.CSharp.Tests dotnet test -p:RuntimeFrameworkVersion=8.0.0 "${{ github.workspace }}/cpp/autobuilder/Semmle.Autobuild.Cpp.Tests" shell: bash stubgentest: runs-on: ubuntu-latest steps:
• uses: actions/checkout@v4
• uses: ./csharp/actions/create-extractor-pack
• name: Run stub generator tests run: |

  Generate (Asp)NetCore stubs

    STUBS_PATH=stubs_output
    python3 scripts/stubs/make_stubs_nuget.py webapp Swashbuckle.AspNetCore.Swagger 6.5.0 "$STUBS_PATH"
    rm -rf ql/test/resources/stubs/_frameworks
    # Update existing stubs in the repo with the freshly generated ones
    mv "$STUBS_PATH/output/stubs/_frameworks" ql/test/resources/stubs/
    git status
    codeql test run --threads=0 --search-path extractor-pack --check-databases --check-undefined-labels --check-repeated-labels --check-redefined-labels --consistency-queries ql/consistency-queries -- ql/test/library-tests/dataflow/flowsources/aspremote
  env:
    GITHUB_TOKEN: ${{ github.token }}

2. Look at the choose-runner job

Expected behavior

According to GitHub, this job isn't valid: https://github.com/jsoref/codeql/actions/runs/7712430252

Invalid workflow file: .github/workflows/csharp-qltest.yml#L1 No steps defined in steps and no workflow called in uses for the following jobs: choose-runner

Generally if a workflow isn't valid, this extension will complain, e.g. if I add just steps::

Screenshots Invalid workflow file: .github/workflows/csharp-qltest.yml#L1 No steps defined in steps and no workflow called in uses for the following jobs: choose-runner

Extension Version v0.26.2

Additional context

[muzimuzhi]

actionlint (https://github.com/rhysd/actionlint) does a good job in detecting empty steps, see here.

There's also a VScode extension for actionlint (I didn't use it myself): https://marketplace.visualstudio.com/items?itemName=arahata.linter-actionlint.