action.yml

name: Commit Hash Verifier
description: Verifies the validity of a commit hash from a specific branch
author: shiftEscape
branding:
  icon: "git-commit"
  color: "purple"

inputs:
  commit-hash:
    description: "The commit hash to verify"
    required: true
    default: ${{ github.sha }}
  branch-name:
    description: "The name of the branch to check the commit against"
    required: true
    default: ${{ github.ref }}

outputs:
  valid_commit:
    description: "Indicates if the commit hash is valid"

runs:
  using: "composite"
  steps:
    - name: Verify commit hash
      id: verify-commit
      shell: bash
      run: |
        branch_name="${{ inputs.branch-name }}"
        commit_id="${{ inputs.commit-hash }}"

        if ! git rev-parse --quiet --verify "${commit_id}"; then
          echo "::set-output name=valid_commit::false"
          echo "Invalid commit hash: \`$commit_id\`"
        else
          # Verify if the commit is on the specified branch
          if ! git merge-base --is-ancestor "${commit_id}" "${branch_name}"; then
            echo "::set-output name=valid_commit::false"
            echo "Commit \`$commit_id\` not found from branch \`$branch_name\`"
          else
            echo "::set-output name=valid_commit::true"
            echo "Commit \`$commit_id\` is valid from branch \`$branch_name\`"
          fi
        fi