name: OpenCodeReview PR Review
description: >-
  AI-powered GitHub PR review with inline comments, sticky summary, and
  incremental non-destructive posting.
author: alibaba
branding:
  icon: eye
  color: green

inputs:
  llm_url:
    description: LLM API endpoint URL (mapped to env OCR_LLM_URL).
    required: true
  llm_auth_token:
    description: LLM auth token (mapped to env OCR_LLM_TOKEN).
    required: true
  llm_model:
    description: Model name (mapped to env OCR_LLM_MODEL).
    required: true
  llm_use_anthropic:
    description: "'true' for Anthropic Claude, 'false' for OpenAI-compatible APIs
      (mapped to env OCR_USE_ANTHROPIC). Required to force an explicit choice."
    required: true
  llm_auth_header:
    description: Custom auth header name (mapped to env OCR_LLM_AUTH_HEADER).
    required: false
  llm_extra_headers:
    description: Extra headers "K=V,K=V" (mapped to env OCR_LLM_EXTRA_HEADERS).
    required: false
  llm_extra_body:
    description: >-
      extra_body JSON for LLM requests. No env var exists for this, so it is
      written via `ocr config set llm.extra_body`.
    required: false
    default: '{"thinking": {"type": "disabled"}}'
  language:
    description: >-
      Review output language, written via `ocr config set language`
      (e.g. English, 中文). No env var exists for this.
    required: false
    default: 'English'
  llm_timeout:
    description: LLM request timeout in seconds (mapped to env OCR_LLM_TIMEOUT).
    required: false
  github_token:
    description: GitHub token used to post review comments.
    required: false
    default: ${{ github.token }}
  ocr_version:
    description: npm version spec for @alibaba-group/open-code-review.
    required: false
    default: latest
  review_concurrency:
    description: Value passed to `ocr review --concurrency`.
    required: false
  background:
    description: Value passed to `ocr review --background`.
    required: false
  rule:
    description: Path to a custom rules JSON file passed to `ocr review --rule`.
    required: false
  upload_artifacts:
    description: >-
      Upload raw JSON result and stderr as workflow artifacts. Must be the
      literal string 'true' or 'false' (quoted); the step gates on a string
      comparison, so an unquoted YAML boolean will not match.
    required: false
    default: 'true'
  sticky_summary:
    description: >-
      Summary dimension. true = update an existing summary comment in place
      (sticky) instead of posting a new one each run.
    required: false
    default: 'true'
  incremental:
    description: >-
      Incremental dimension. true = only append inline comments whose (path,
      line range) does not overlap an existing bot review comment. History is
      never deleted (non-destructive).
    required: false
    default: 'false'
  incremental_overlap_threshold:
    description: >-
      IoU (intersection-over-union) threshold used by incremental mode to decide
      whether a new multi-line comment overlaps an existing one. Two single-line
      comments match when on the same line; single- vs multi-line never match.
      Value in (0, 1]; ignored unless incremental is true.
    required: false
    default: '0.6'
  base_ref:
    description: >-
      Override the base ref. Provide this (and head_sha) when invoking from a
      non-PR event such as issue_comment.
    required: false
  head_sha:
    description: Override the head commit SHA (use with base_ref for comment triggers).
    required: false
  node_version:
    description: Node.js version for actions/setup-node.
    required: false
    default: '24'

outputs:
  comments_total:
    description: Total number of review comments generated by OCR.
    value: ${{ steps.post.outputs.comments_total }}
  comments_inline:
    description: Number of inline comments successfully posted.
    value: ${{ steps.post.outputs.comments_inline }}
  comments_skipped:
    description: Number of inline comments skipped by incremental mode (overlap with history).
    value: ${{ steps.post.outputs.comments_skipped }}
  comments_failed:
    description: Number of inline comments that failed to post.
    value: ${{ steps.post.outputs.comments_failed }}
  summary_comment_url:
    description: URL of the posted/updated summary comment, if any.
    value: ${{ steps.post.outputs.summary_comment_url }}

runs:
  using: composite
  steps:
    - name: Check git and Node.js
      id: check_deps
      shell: bash
      run: |
        if command -v git >/dev/null 2>&1; then
          echo "git_installed=true" >> "$GITHUB_OUTPUT"
          echo "git is already installed: $(git --version)"
        else
          echo "git_installed=false" >> "$GITHUB_OUTPUT"
          echo "git is not installed"
        fi
        if command -v node >/dev/null 2>&1; then
          echo "node_installed=true" >> "$GITHUB_OUTPUT"
          echo "node is already installed: $(node --version)"
        else
          echo "node_installed=false" >> "$GITHUB_OUTPUT"
          echo "node is not installed"
        fi

    - name: Install git
      if: steps.check_deps.outputs.git_installed != 'true'
      shell: bash
      run: |
        if command -v apt-get >/dev/null 2>&1; then
          sudo apt-get update
          sudo apt-get install -y git
        elif command -v brew >/dev/null 2>&1; then
          brew install git
        elif command -v yum >/dev/null 2>&1; then
          sudo yum install -y git
        elif command -v apk >/dev/null 2>&1; then
          sudo apk add --no-cache git
        else
          echo "::error::Unable to install git: no supported package manager found"
          exit 1
        fi
        git --version

    - name: Setup Node.js
      if: steps.check_deps.outputs.node_installed != 'true'
      uses: actions/setup-node@v4
      with:
        node-version: ${{ inputs.node_version }}

    - name: Resolve PR refs
      shell: bash
      env:
        INPUT_BASE_REF: ${{ inputs.base_ref }}
        INPUT_HEAD_SHA: ${{ inputs.head_sha }}
        EVENT_BASE_REF: ${{ github.event.pull_request.base.ref }}
        EVENT_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
      run: |
        BASE_REF="${INPUT_BASE_REF:-$EVENT_BASE_REF}"
        HEAD_SHA="${INPUT_HEAD_SHA:-$EVENT_HEAD_SHA}"
        echo "BASE_REF=$BASE_REF" >> "$GITHUB_ENV"
        echo "HEAD_SHA=$HEAD_SHA" >> "$GITHUB_ENV"
        echo "PR base ref: $BASE_REF"
        echo "PR head sha: $HEAD_SHA"

    - name: Checkout base
      uses: actions/checkout@v4
      with:
        # Checkout the trusted base, not the PR head. OCR reviews the
        # base-to-head diff from git objects; the head commit's blobs are
        # fetched separately so they are resolvable without materializing
        # untrusted PR files into the working tree.
        fetch-depth: 0

    - name: Fetch PR head (fork-safe)
      if: env.HEAD_SHA != ''
      shell: bash
      env:
        PR_NUM: ${{ github.event.pull_request.number || github.event.issue.number }}
      run: |
        if [ -n "$PR_NUM" ]; then
          git fetch origin "pull/${PR_NUM}/head"
        fi

    - name: Compute merge-base
      shell: bash
      run: |
        git fetch origin "${BASE_REF}" 2>/dev/null || true
        MERGE_BASE=$(git merge-base "origin/${BASE_REF}" "${HEAD_SHA}" 2>/dev/null || echo "${HEAD_SHA}")
        echo "MERGE_BASE=$MERGE_BASE" >> "$GITHUB_ENV"
        echo "Reviewing ${HEAD_SHA} from merge-base ${MERGE_BASE} (base origin/${BASE_REF})"

    - name: Install OpenCodeReview
      shell: bash
      env:
        OCR_VERSION: ${{ inputs.ocr_version }}
      run: |
        npm install -g "@alibaba-group/open-code-review@${OCR_VERSION}"
        echo "OpenCodeReview installed:"
        ocr version || true

    - name: Configure OCR
      env:
        OCR_EXTRA_BODY: ${{ inputs.llm_extra_body }}
        OCR_LANGUAGE: ${{ inputs.language }}
      shell: bash
      run: |
        ocr config set llm.extra_body "$OCR_EXTRA_BODY"
        ocr config set language "$OCR_LANGUAGE"

    - name: Run OpenCodeReview
      env:
        OCR_LLM_URL: ${{ inputs.llm_url }}
        OCR_LLM_TOKEN: ${{ inputs.llm_auth_token }}
        OCR_LLM_MODEL: ${{ inputs.llm_model }}
        OCR_USE_ANTHROPIC: ${{ inputs.llm_use_anthropic }}
        OCR_LLM_AUTH_HEADER: ${{ inputs.llm_auth_header }}
        OCR_LLM_EXTRA_HEADERS: ${{ inputs.llm_extra_headers }}
        OCR_LLM_TIMEOUT: ${{ inputs.llm_timeout }}
        OCR_REVIEW_CONCURRENCY: ${{ inputs.review_concurrency }}
        OCR_BACKGROUND: ${{ inputs.background }}
        OCR_RULE: ${{ inputs.rule }}
      shell: bash
      run: |
        ARGS=(--from "${MERGE_BASE}" --to "${HEAD_SHA}" --format json)
        [ -n "$OCR_REVIEW_CONCURRENCY" ] && ARGS+=(--concurrency "$OCR_REVIEW_CONCURRENCY")
        [ -n "$OCR_BACKGROUND" ] && ARGS+=(--background "$OCR_BACKGROUND")
        [ -n "$OCR_RULE" ] && ARGS+=(--rule "$OCR_RULE")
        set +e
        ocr review "${ARGS[@]}" > /tmp/ocr-result.json 2>/tmp/ocr-stderr.log
        OCR_EXIT_CODE=$?
        set -e
        echo "OCR_EXIT_CODE=$OCR_EXIT_CODE" >> "$GITHUB_ENV"
        echo "=== OCR result ==="
        cat /tmp/ocr-result.json
        echo "=== OCR stderr ==="
        cat /tmp/ocr-stderr.log

    - name: Upload review artifacts
      if: ${{ always() && inputs.upload_artifacts == 'true' }}
      uses: actions/upload-artifact@v4
      with:
        name: ocr-review-result-${{ github.run_id }}-${{ github.run_attempt }}
        path: |
          /tmp/ocr-result.json
          /tmp/ocr-stderr.log
        if-no-files-found: warn

    - name: Fail job on OCR error
      if: env.OCR_EXIT_CODE != '0'
      shell: bash
      run: |
        echo "ocr review exited with code ${OCR_EXIT_CODE}; see uploaded artifacts for details."
        exit "${OCR_EXIT_CODE}"

    - name: Post review comments
      if: env.OCR_EXIT_CODE == '0'
      id: post
      uses: actions/github-script@v7
      env:
        OCR_INCREMENTAL_OVERLAP_THRESHOLD: ${{ inputs.incremental_overlap_threshold }}
      with:
        github-token: ${{ inputs.github_token }}
        script: |
          // Locate the helper shipped alongside action.yml at runtime.
          // GITHUB_ACTION_PATH: correct for published (remote) actions and for
          // local actions when not running in a container.
          // GITHUB_WORKSPACE: correct for local `uses: ./` actions — under
          // self-hosted + container setups, GITHUB_ACTION_PATH points to the
          // host path (invisible inside the container), whereas GITHUB_WORKSPACE
          // is correctly mapped to /__w.
          const fs = require('fs');
          const path = require('path');
          const REL = 'scripts/github-actions/post-review-comments.js';
          const roots = [process.env.GITHUB_ACTION_PATH, process.env.GITHUB_WORKSPACE].filter(Boolean);
          const helper = roots.map(r => path.resolve(r, REL)).find(p => fs.existsSync(p));
          if (!helper) throw new Error(`Could not locate ${REL}; searched roots: ${roots.join(', ')}`);
          const { runPostReviewComments } = require(helper);
          await runPostReviewComments({
            github,
            context,
            core,
            fs,
            resultPath: '/tmp/ocr-result.json',
            stderrPath: '/tmp/ocr-stderr.log',
            stickySummary: ${{ inputs.sticky_summary == 'true' }},
            incremental: ${{ inputs.incremental == 'true' }},
            incrementalOverlapThreshold: parseFloat(process.env.OCR_INCREMENTAL_OVERLAP_THRESHOLD),
          });