feat: add prefix, case-insensitive headers, and format inputs to action

[timonrieger]

• What: Extend changelog GitHub Action inputs and wire them through to entrypoint.sh.

  • New inputs:
    • prefix-base: Prefix for base version/path
    • prefix-revision: Prefix for revision version/path
    • case-insensitive-headers: Treat headers case-insensitively (true/false)
    • format: Output format (e.g., markdown, json)
  • Entrypoint:
    • Passes new inputs to oasdiff changelog as flags:
      • --prefix-base, --prefix-revision
      • --case-insensitive-headers
      • --format

• Why: Increases feature parity with the underlying oasdiff CLI tool

• Changes

  • changelog/action.yml: Add four optional inputs with defaults; append them to the runs.args.
  • changelog/entrypoint.sh: Parse new args and conditionally append matching oasdiff flags.

• Usage

- name: Generate API changelog
  uses: ./.github/actions/changelog
  with:
    base: refs/tags/v1.2.3
    revision: refs/heads/main
    include-path-params: 'false'
    exclude-elements: ''
    composed: 'false'
    output-to-file: 'changelog.md'
    prefix-base: 'services/api/'
    prefix-revision: 'services/api/'
    case-insensitive-headers: 'true'
    format: 'markdown'

• Backward compatibility
  • All new inputs are optional with safe defaults; existing workflows remain unchanged.
  • entrypoint.sh preserves existing behavior and only appends flags when inputs are provided/true.

[effoeffi]

Thanks @timonrieger.
Please add me as a reviewer when the PR is ready.

[timonrieger]

Thanks @timonrieger. Please add me as a reviewer when the PR is ready.

Hey @effoeffi , I cannot add any reviewers to the existing PR, neither using the UI nor the CLI

gh pr edit https://github.com/oasdiff/oasdiff-action/pull/64 --add-reviewer effoeffi

GraphQL: timonrieger does not have the correct permissions to execute `RequestReviews` (requestReviews)

In a new PR template I cannot set it either 🤔

Nevertheless, the PR is ready for review.

[effoeffi]

Please, update README with the new parameters.

[effoeffi]

Debug output should include the new parameters

[timonrieger]

Please, update README with the new parameters.

done 😄