Publish on tag task

Author: djbe

.github/workflows/tag-publish.yml

@@ -0,0 +1,26 @@
+name: Publish on Tag
+
+on:
+  push:
+    tags:
+      - '*'
+  workflow_dispatch:
+
+jobs:
+  github:
+    name: GitHub Release
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+      -
+        name: Create release on GitHub
+        run: bundle exec rake release:github
+        env:
+          DANGER_GITHUB_API_TOKEN: ${{ secrets.danger_github_api_token }}

rakelib/release.rake

@@ -0,0 +1,60 @@
+# frozen_string_literal: true
+
+# Used constants:
+# - BUILD_DIR
+
+def first_match_in_file(file, regexp)
+  File.foreach(file) do |line|
+    m = regexp.match(line)
+    return m if m
+  end
+end
+
+## [ Release a new version ] ##################################################
+
+namespace :release do
+  desc 'Create a new release'
+  task :new => [:check_versions, :confirm, 'spm:test_command', :github]
+
+  desc 'Check if all versions from the podspecs and CHANGELOG match'
+  task :check_versions do
+    results = []
+
+    # Check if bundler is installed first, as we'll need it for the cocoapods task (and we prefer to fail early)
+    `which bundler`
+    results << Utils.table_result(
+      $CHILD_STATUS.success?,
+      'Bundler installed',
+      'Please install bundler using `gem install bundler` and run `bundle install` first.'
+    )
+    changelog_has_stable = system("grep -qi '^## Stable Branch' CHANGELOG.md")
+    results << Utils.table_result(
+      !changelog_has_stable,
+      'CHANGELOG, No stable',
+      'Please remove section for stable branch in CHANGELOG'
+    )
+
+    exit 1 unless results.all?
+  end
+
+  desc "Ask to release"
+  task :confirm do
+    print "Release version new version [Y/n]? "
+    exit 2 unless STDIN.gets.chomp == 'Y'
+  end
+
+  desc "Create a new GitHub release"
+  task :github do
+    require 'octokit'
+
+    client = Utils.octokit_client
+    tag = Utils.top_changelog_version
+    body = Utils.top_changelog_entry
+
+    raise 'Must be a valid version' if tag == 'Stable Branch'
+
+    repo_name = File.basename(`git remote get-url origin`.chomp, '.git').freeze
+    puts "Pushing release notes for tag #{tag}"
+    client.create_release("SwiftGen/#{repo_name}", tag, name: tag, body: body)
+  end
+end