DEVO-1375 Automate updating apk pins

.github/scripts/update_pinned_apk_versions.rb

@@ -0,0 +1,108 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require "open3"
+require "shellwords"
+
+DOCKERFILE_PATH = ENV.fetch("DOCKERFILE_PATH", ".docker/app/Dockerfile")
+BASE_IMAGE = ENV.fetch("APK_CHECK_BASE_IMAGE", "ruby:3.4-alpine")
+SUMMARY_PATH = ENV["APK_UPDATE_SUMMARY_PATH"]
+
+def read_dockerfile
+  File.read(DOCKERFILE_PATH)
+end
+
+def pinned_packages(contents)
+  packages = {}
+  in_apk_add = false
+
+  contents.each_line do |line|
+    stripped = line.strip
+
+    in_apk_add = true if stripped.start_with?("RUN apk add ")
+    if in_apk_add
+      match = stripped.match(/^([a-z0-9.+_-]+)=([^\s\\]+)\s*\\?$/i)
+      packages[match[1]] = match[2] if match
+      in_apk_add = false unless stripped.end_with?("\\")
+    end
+  end
+
+  packages
+end
+
+def parse_version_from_search_output(name, stdout)
+  first_line = stdout.each_line.find { |line| !line.strip.empty? }
+  raise "No apk search results returned for package=#{name}" unless first_line
+
+  package_token = first_line.split(/\s+-\s+/, 2).first
+  match = package_token.match(/-(\d[\w.]*-r\d+)$/)
+  raise "Unable to parse apk version for package=#{name} from output: #{stdout.strip}" unless match
+
+  match[1]
+end
+
+def latest_versions(package_names)
+  return {} if package_names.empty?
+
+  versions = {}
+
+  package_names.each do |name|
+    search_command = "apk update >/dev/null && apk search -x -v #{Shellwords.escape(name)}"
+    command = ["docker", "run", "--rm", BASE_IMAGE, "sh", "-lc", search_command]
+    stdout, stderr, status = Open3.capture3(*command)
+
+    unless status.success?
+      detail = [
+        "package=#{name}",
+        "status=#{status.exitstatus}",
+        ("stdout=#{stdout.strip}" unless stdout.strip.empty?),
+        ("stderr=#{stderr.strip}" unless stderr.strip.empty?)
+      ].compact.join(", ")
+      raise "Failed to query apk package version: #{detail}"
+    end
+
+    versions[name] = parse_version_from_search_output(name, stdout)
+  end
+
+  versions
+end
+
+def apply_updates(contents, current_versions, available_versions)
+  updates = current_versions.each_with_object({}) do |(name, current), memo|
+    latest = available_versions[name]
+    memo[name] = [current, latest] if latest && latest != current
+  end
+
+  updated_contents = updates.reduce(contents) do |result, (name, (current, latest))|
+    result.gsub(/\b#{Regexp.escape(name)}=#{Regexp.escape(current)}\b/, "#{name}=#{latest}")
+  end
+
+  [updated_contents, updates]
+end
+
+def write_summary(updates)
+  return unless SUMMARY_PATH
+
+  body =
+    if updates.empty?
+      "No APK package pin updates are available.\n"
+    else
+      lines = updates.sort.map { |name, (current, latest)| "- `#{name}`: `#{current}` -> `#{latest}`" }
+      ["Updated APK package pins in `#{DOCKERFILE_PATH}`:", *lines].join("\n") + "\n"
+    end
+
+  File.write(SUMMARY_PATH, body)
+end
+
+contents = read_dockerfile
+current_versions = pinned_packages(contents)
+available_versions = latest_versions(current_versions.keys)
+updated_contents, updates = apply_updates(contents, current_versions, available_versions)
+
+if updated_contents != contents
+  File.write(DOCKERFILE_PATH, updated_contents)
+end
+
+write_summary(updates)
+
+puts(updates.empty? ? "No pinned APK updates available." : "Updated #{updates.size} pinned APK packages.")

.github/workflows/update-apk-pins.yml

@@ -0,0 +1,40 @@
+name: Update APK Pins
+
+on:
+  schedule:
+    # Sunday and Thursday at 09:00 UTC
+    - cron: "0 9 * * 0"
+    - cron: "0 9 * * 4"
+  workflow_dispatch: {}
+
+concurrency:
+  group: ${{ github.workflow }}
+  cancel-in-progress: true
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  update_apk_pins:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+
+      - name: Update pinned apk versions
+        run: ruby .github/scripts/update_pinned_apk_versions.rb
+        env:
+          APK_CHECK_BASE_IMAGE: ruby:3.4-alpine
+          APK_UPDATE_SUMMARY_PATH: /tmp/apk-update-summary.md
+
+      - name: Create pull request
+        uses: peter-evans/create-pull-request@v7
+        with:
+          add-paths: .docker/app/Dockerfile
+          branch: chore/update-apk-pins
+          commit-message: "Update pinned apk packages"
+          title: "Update pinned apk packages"
+          body-path: /tmp/apk-update-summary.md
+          delete-branch: true