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Boolean inputs are not actually booleans in composite actions #2238

@flobernd

Description

@flobernd

Describe the bug

I'm not sure if closed issues are monitored, as there was no reaction from official side at all. This is a new issue related to #1483.

For composite actions boolean inputs are not actually booleans.

To Reproduce

inputs:
  ...
  generate-release-notes:
    description: ...
    required: false
    type: boolean
    default: false

runs:
  using: composite
  steps:
    - name: Create Release
      uses: actions/github-script@v6
      with:
        script: |
          github.rest.repos.createRelease({
            owner: context.repo.owner,
            repo: context.repo.repo,
            ...
            generate_release_notes: ${{ inputs.generate-release-notes && 'true' || 'false' }}
          });

Caller:

- uses: flobernd/actions/github/create-release@master
  with:
    tag-name: v1.2.4
    generate-release-notes: true

This line always evaluates to false:

generate_release_notes: ${{ inputs.generate-release-notes && 'true' || 'false' }}

The explicit syntax does incorrectly evaluate to false as well:

generate_release_notes: ${{ inputs.generate-release-notes == true && 'true' || 'false' }}

Correct behavior is only observed when using string semantics:

generate_release_notes: ${{ inputs.generate-release-notes == 'true' && 'true' || 'false' }}

Expected behavior

generate_release_notes: ${{ inputs.generate-release-notes && 'true' || 'false' }}
generate_release_notes: ${{ inputs.generate-release-notes == true && 'true' || 'false' }}

Evaluates to true.

Runner Version and Platform

GitHub managed runners (latest version). All platforms.

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