A CLI tool that retrieves the tested-with stanza of a cabal file and formats it in such a way that GitHub Actions can use it.

The inputs of the action (under the with: stanza) are the following:

• cabal-file:
  The path to your cabal file, e.g. somefolder/myproject.cabal.
  Required: true

• version:
  The version of the get-tested tool that is used.
  Required: false
  Default: The latest release

• windows:
  (deprecated) Enable Windows runner, latest version.
  Required: false
  Default: false

• windows-version:
  Enable Windows runner. If both windows and windows-version inputs are set, the explicit version will take priority.
  Required: false
  Default: Not set

• macos:
  (deprecated) Enable macOS runner, latest version.
  Required: false
  Default: false

• macos-version:
  Enable macOS runner. If both macos and macos-version inputs are set, the explicit version will take priority.
  Required: false
  Default: Not set

• ubuntu:
  (deprecated) Enable Ubuntu runner, latest version.
  Required: false
  Default: false

• ubuntu-version:
  Enable Ubuntu runner. If both ubuntu and ubuntu-version inputs are set, the explicit version will take priority.
  Required: false
  Default: Not set

• newest:
  Enable only the newest GHC version found in the cabal file
  Required: false
  Default: false

• oldest:
  Enable only the oldest GHC version found in the cabal file
  Required: false
  Default: false

See below for an example:

jobs:
  generate-matrix:
    name: "Generate matrix from cabal"
    outputs:
      matrix: ${{ steps.set-matrix.outputs.matrix }}
    runs-on: ubuntu-latest
    steps:
      - name: Extract the tested GHC versions
        id: set-matrix
        uses: kleidukos/get-tested@v0.1.7.1
        with:
          cabal-file: get-tested.cabal
          ubuntu-version: "latest"
          macos-version: "latest"
          version: 0.1.7.1
  tests:
    name: ${{ matrix.ghc }} on ${{ matrix.os }}
    needs: generate-matrix
    runs-on: ${{ matrix.os }}
    strategy:
      matrix: ${{ fromJSON(needs.generate-matrix.outputs.matrix) }}