gmc/action.yml at main · samzong/gmc · GitHub

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name: "GMC - Git Message Commit"
description: "Generate high-quality commit messages using LLM"
author: "samzong"
branding:
  icon: "edit-3"
  color: "purple"

inputs:
  args:
    description: "Extra args for generate mode (e.g. '-a --issue 123 --branch ""add auth""')"
    required: false
    default: ""
  apikey:
    description: "OpenAI API key for LLM"
    required: false
  apibase:
    description: "OpenAI API Base URL (proxy)"
    required: false
  model:
    description: "LLM model (e.g. gpt-4.1-mini)"
    required: false
  role:
    description: "Role context for message generation"
    required: false
  prompt_template:
    description: "Prompt template name (in prompts_dir)"
    required: false
  working-directory:
    description: "Working directory to run commands in"
    required: false
    default: "."
  comment:
    description: "If true on PRs, post generation output as a comment"
    required: false
    default: "false"

outputs:
  report:
    description: "Full text output from generate run"
    value: ${{ steps.run.outputs.report }}
  commit_message:
    description: "Generated commit message (typically with --dry-run)"
    value: ${{ steps.run.outputs.commit_message }}

runs:
  using: "composite"
  steps:
    - name: Set up Go
      uses: actions/setup-go@v5
      with:
        go-version: '1.24.x'

    - name: Build gmc
      shell: bash
      working-directory: ${{ inputs.working-directory }}
      run: |
        set -euo pipefail
        echo "Building gmc binary..."
        go build -trimpath -o gmc .

    - name: Configure gmc
      shell: bash
      working-directory: ${{ inputs.working-directory }}
      run: |
        set -euo pipefail
        if [ -n "${{ inputs.apikey }}" ]; then ./gmc config set apikey "${{ inputs.apikey }}"; fi
        if [ -n "${{ inputs.apibase }}" ]; then ./gmc config set apibase "${{ inputs.apibase }}"; fi
        if [ -n "${{ inputs.model }}" ]; then ./gmc config set model "${{ inputs.model }}"; fi
        if [ -n "${{ inputs.role }}" ]; then ./gmc config set role "${{ inputs.role }}"; fi
        if [ -n "${{ inputs.prompt_template }}" ]; then ./gmc config set prompt_template "${{ inputs.prompt_template }}"; fi

    - name: Run GMC
      id: run
      shell: bash
      working-directory: ${{ inputs.working-directory }}
      env:
        # Ensure pager/editor don't block in CI
        PAGER: cat
        EDITOR: true
        VISUAL: true
      run: |
        set -euo pipefail
        mkdir -p "$RUNNER_TEMP"
        echo "Running: ./gmc -y --dry-run ${{ inputs.args }}"
        if ! OUT=$(./gmc -y --dry-run ${{ inputs.args }} 2>&1); then
          echo "gmc generate returned non-zero; continuing and capturing output"
        fi
        printf "%s\n" "$OUT" | sed -e 's/\r$//' > "$RUNNER_TEMP/gmc_output.txt"
        printf 'report<<EOF\n%s\nEOF\n' "$OUT" >> "$GITHUB_OUTPUT"
        printf 'commit_message<<EOF\n%s\nEOF\n' "$OUT" >> "$GITHUB_OUTPUT"

    - name: Comment on PR with output
      if: ${{ inputs.comment == 'true' && startsWith(github.event_name, 'pull_request') }}
      uses: actions/github-script@v7
      with:
        script: |
          const fs = require('fs');
          const path = process.env.RUNNER_TEMP + '/gmc_output.txt';
          const body = fs.readFileSync(path, 'utf8');
          await github.rest.issues.createComment({
            owner: context.repo.owner,
            repo: context.repo.repo,
            issue_number: context.issue.number,
            body: body.length > 65000 ? body.slice(0, 65000) + '\n\n…(truncated)…' : body,
          });