Comment link to patch as comment

Author: kfischer-okarin

.github/actions/comment_patch_url.rb

@@ -0,0 +1,76 @@
+#!/usr/bin/env ruby
+
+require 'json'
+
+require 'faraday'
+
+REPO = 'redmine-patch-meetup/redmine-dev-mirror'
+
+WORKFLOW_RUN = JSON.parse ENV['WORKFLOW_RUN_JSON']
+
+CONNECTION = Faraday.new('https://api.github.com/') do |conn|
+  conn.response :raise_error
+  conn.adapter Faraday.default_adapter
+end
+
+def repo_resource(resource)
+  "repos/#{REPO}/#{resource}"
+end
+
+def get_repo_resource(resource)
+  response = CONNECTION.get repo_resource(resource)
+  JSON.parse response.body
+end
+
+def post_to_repo_resource(resource, body)
+  response = CONNECTION.post repo_resource(resource),
+                             body.to_json,
+                             "Content-Type" => "application/json",
+                             "Authorization" => "token #{ENV['GITHUB_TOKEN']}"
+  JSON.parse response.body
+end
+
+def patch_artifact_id
+  response = JSON.parse CONNECTION.get(WORKFLOW_RUN['artifacts_url']).body
+  patch_artifact = response['artifacts'].find { |artifact| artifact['name'] == 'patch' }
+  patch_artifact['id']
+end
+
+def get_suite_id
+  suite_url = WORKFLOW_RUN['check_suite_url']
+  id_start_index = suite_url.rindex('/') + 1
+  suite_url[id_start_index..-1]
+end
+
+def patch_artifact_download_url
+  "https://github.com/#{REPO}/suites/#{get_suite_id}/artifacts/#{patch_artifact_id}"
+end
+
+def pull_request_number
+  WORKFLOW_RUN['pull_requests'][0]['number']
+end
+
+def post_pr_comment(pr_number, comment)
+  post_to_repo_resource "issues/#{pr_number}/comments", { body: comment }
+end
+
+def find_previous_comment_id(pr_number)
+  comments = get_repo_resource "issues/#{pr_number}/comments"
+  previous_comment = comments.find { |comment|
+    comment['body'].include?('Patch can be downloaded [here]') && comment['user']['login'].include?('github-actions')
+  }
+  previous_comment['id'] if previous_comment
+end
+
+def delete_comment(comment_id)
+  CONNECTION.delete repo_resource("issues/comments/#{comment_id}"), nil, "Authorization" => "token #{ENV['GITHUB_TOKEN']}"
+end
+
+def main
+  existing_comment_id = find_previous_comment_id(pull_request_number)
+  delete_comment(existing_comment_id) if existing_comment_id
+
+  post_pr_comment pull_request_number, "Patch can be downloaded [here](#{patch_artifact_download_url})"
+end
+
+main if __FILE__ == $0

.github/workflows/comment-patch.yml

@@ -0,0 +1,24 @@
+name: Comment Patch
+
+on:
+  workflow_run:
+    workflows:
+      - Create Patch
+    types:
+      - completed
+    branches-ignore:
+      - master
+      - development
+
+jobs:
+  create-patch:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install gems
+        run: sudo gem install faraday
+      - uses: actions/checkout@v2
+      - name: Comment Patch URL
+        run: ./.github/actions/comment_patch_url.rb
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          WORKFLOW_RUN_JSON: ${{ toJSON(github.event.workflow_run) }}