A GitHub Composite Action that validates the consistency of version numbers when publishing a WordPress plugin.
It ensures that:

• The Release Tag (e.g., v1.2.3 or 1.2.3)
• The Stable tag in README.txt
• The Version header in the main plugin file

are consistent before deploying to WordPress.org.

• Strips a leading v from release tags automatically (v1.2.3 → 1.2.3).
• Case-insensitive detection of README.txt.
• Validates:
  • README.txt exists and contains a Stable tag.
  • The plugin main file exists and contains a Version: header.
  • Stable tag matches the release tag (or is set to trunk).
  • Plugin header version matches the release tag.
• Fails early with a clear error message if checks do not pass.
• Exposes two outputs:
  • tag → normalized version number
  • publish → "true" or "false"

name: Build and Deploy

on:
  release:
    types: [published]

jobs:
  validate:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Validate WP Plugin Version
        id: validate
        uses: airygen/action-wordpress-plugin-release-check@v1
        with:
          plugin_file: airyseo.php

      - name: Use validation outputs
        if: steps.validate.outputs.publish == 'true'
        run: |
          echo "Version is valid!"
          echo "Normalized tag: ${{ steps.validate.outputs.tag }}"

• This action is intended to be used in release workflows triggered by on: release.
• Always check steps.<id>.outputs.publish before deploying to WordPress.org.
• Outputs are strings, so compare them with 'true' or 'false' explicitly.