name: dependabot

on:
  pull_request:
    types:
      - opened

permissions:
  contents: read

jobs:
  dependabot-automerge:
    runs-on: ubuntu-latest
    if: >
      github.event_name == 'pull_request' &&
      github.event.action == 'opened' &&
      github.event.pull_request.user.login == 'dependabot[bot]' &&
      github.event.pull_request.user.id == 49699333 &&
      github.repository == 'coder/coder'
    permissions:
      pull-requests: write
      contents: write
    steps:
      - name: Dependabot metadata
        id: metadata
        uses: dependabot/fetch-metadata@ffa630c65fa7e0ecfa0625b5ceda64399aea1b36 # v3.0.0
        with:
          github-token: "${{ secrets.GITHUB_TOKEN }}"
          alert-lookup: true

      - name: Add backport label to security updates
        id: security_backport
        if: >-
          ${{
            steps.metadata.outputs.alert-state != '' &&
            !contains(github.event.pull_request.labels.*.name, 'backport')
          }}
        run: |
          set -euo pipefail

          echo "Adding backport label to security update PR $PR_URL"
          gh pr edit "$PR_URL" --add-label backport
          echo "added=true" >> "$GITHUB_OUTPUT"
        env:
          PR_URL: ${{ github.event.pull_request.html_url }}
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Approve the PR
        if: steps.metadata.outputs.package-ecosystem != 'github-actions'
        run: |
          echo "Approving $PR_URL"
          gh pr review --approve "$PR_URL"
        env:
          PR_URL: ${{github.event.pull_request.html_url}}
          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}

      - name: Enable auto-merge
        if: steps.metadata.outputs.package-ecosystem != 'github-actions'
        run: |
          echo "Enabling auto-merge for $PR_URL"
          gh pr merge --auto --squash "$PR_URL"
        env:
          PR_URL: ${{github.event.pull_request.html_url}}
          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}

      - name: Send Slack notification
        run: |
          if [ "$SECURITY_BACKPORT" = "true" ] && [ "$PACKAGE_ECOSYSTEM" = "github-actions" ]; then
            STATUS_TEXT=":rotating_light: Dependabot opened security PR #${PR_NUMBER} and added the backport label (GitHub Actions changes are not auto-merged)"
          elif [ "$SECURITY_BACKPORT" = "true" ]; then
            STATUS_TEXT=":rotating_light: Auto merge enabled for Dependabot security PR #${PR_NUMBER}; backport label added"
          elif [ "$PACKAGE_ECOSYSTEM" = "github-actions" ]; then
            STATUS_TEXT=":pr-opened: Dependabot opened PR #${PR_NUMBER} (GitHub Actions changes are not auto-merged)"
          else
            STATUS_TEXT=":pr-merged: Auto merge enabled for Dependabot PR #${PR_NUMBER}"
          fi
          curl -X POST -H 'Content-type: application/json' \
          --data '{
            "username": "dependabot",
            "icon_url": "https://avatars.githubusercontent.com/u/27347476",
            "blocks": [
              {
                "type": "header",
                "text": {
                  "type": "plain_text",
                  "text": "'"${STATUS_TEXT}"'",
                  "emoji": true
                }
              },
              {
                "type": "section",
                "fields": [
                  {
                    "type": "mrkdwn",
                    "text": "'"${PR_TITLE}"'"
                  }
                ]
              },
              {
                "type": "actions",
                "elements": [
                  {
                    "type": "button",
                    "text": {
                      "type": "plain_text",
                      "text": "View PR"
                    },
                    "url": "'"${PR_URL}"'"
                  }
                ]
              }
            ]
          }' "${{ secrets.DEPENDABOT_PRS_SLACK_WEBHOOK }}"
        env:
          SLACK_WEBHOOK: ${{ secrets.DEPENDABOT_PRS_SLACK_WEBHOOK }}
          PACKAGE_ECOSYSTEM: ${{ steps.metadata.outputs.package-ecosystem }}
          SECURITY_BACKPORT: ${{ steps.security_backport.outputs.added || 'false' }}
          PR_NUMBER: ${{ github.event.pull_request.number }}
          PR_TITLE: ${{ github.event.pull_request.title }}
          PR_URL: ${{ github.event.pull_request.html_url }}