Add devcontainers ecosystem

devcontainers/lib/dependabot/devcontainers/file_fetcher.rb

@@ -1,12 +1,82 @@
-# typed: strong
+# typed: true
 # frozen_string_literal: true
 
 require "dependabot/file_fetchers"
 require "dependabot/file_fetchers/base"
+require "dependabot/devcontainers/utils"
 
 module Dependabot
   module Devcontainers
     class FileFetcher < Dependabot::FileFetchers::Base
+      def self.required_files_in?(filenames)
+        # There's several other places a devcontainer.json can be checked into
+        # See: https://containers.dev/implementors/spec/#devcontainerjson
+        filenames.any? { |f| f.end_with?("devcontainer.json") }
+      end
+
+      def self.required_files_message
+        "Repo must contain a dev container configuration file."
+      end
+
+      def fetch_files
+        fetched_files = []
+        fetched_files += root_files
+        fetched_files += scoped_files
+        fetched_files += custom_directory_files
+        return fetched_files if fetched_files.any?
+
+        raise Dependabot::DependencyFileNotFound.new(
+          nil,
+          "Neither .devcontainer.json nor .devcontainer/devcontainer.json nor " \
+          ".devcontainer/<anything>/devcontainer.json found in #{directory}"
+        )
+      end
+
+      private
+
+      def root_files
+        fetch_config_and_lockfile_from(".")
+      end
+
+      def scoped_files
+        return [] unless devcontainer_directory
+
+        fetch_config_and_lockfile_from(".devcontainer")
+      end
+
+      def custom_directory_files
+        return [] unless devcontainer_directory
+
+        custom_directories.flat_map do |directory|
+          fetch_config_and_lockfile_from(directory.path)
+        end
+      end
+
+      def custom_directories
+        repo_contents(dir: ".devcontainer").select { |f| f.type == "dir" && f.name != ".devcontainer" }
+      end
+
+      def devcontainer_directory
+        return @devcontainer_directory if defined?(@devcontainer_directory)
+
+        @devcontainer_directory = repo_contents.find { |f| f.type == "dir" && f.name == ".devcontainer" }
+      end
+
+      def fetch_config_and_lockfile_from(directory)
+        files = []
+
+        config_name = Utils.expected_config_basename(directory)
+        config_file = fetch_file_if_present(File.join(directory, config_name))
+        return files unless config_file
+
+        files << config_file
+
+        lockfile_name = Utils.expected_lockfile_name(File.basename(config_file.name))
+        lockfile = fetch_support_file(File.join(directory, lockfile_name))
+        files << lockfile if lockfile
+
+        files
+      end
     end
   end
 end

devcontainers/lib/dependabot/devcontainers/file_parser.rb

@@ -3,17 +3,47 @@
 
 require "dependabot/file_parsers"
 require "dependabot/file_parsers/base"
+require "dependabot/devcontainers/version"
+require "dependabot/devcontainers/file_parser/feature_dependency_parser"
 
 module Dependabot
   module Devcontainers
     class FileParser < Dependabot::FileParsers::Base
+      require "dependabot/file_parsers/base/dependency_set"
+
       def parse
-        []
+        dependency_set = DependencySet.new
+
+        config_dependency_files.each do |config_dependency_file|
+          parse_features(config_dependency_file).each do |dep|
+            dependency_set << dep
+          end
+        end
+
+        dependency_set.dependencies
       end
 
       private
 
-      def check_required_files; end
+      def check_required_files
+        return if config_dependency_files.any?
+
+        raise "No dev container configuration!"
+      end
+
+      def parse_features(config_dependency_file)
+        FeatureDependencyParser.new(
+          config_dependency_file: config_dependency_file,
+          repo_contents_path: repo_contents_path,
+          credentials: credentials
+        ).parse
+      end
+
+      def config_dependency_files
+        @config_dependency_files ||= dependency_files.select do |f|
+          f.name.end_with?("devcontainer.json")
+        end
+      end
     end
   end
 end

devcontainers/lib/dependabot/devcontainers/file_parser/feature_dependency_parser.rb

@@ -0,0 +1,97 @@
+# typed: true
+# frozen_string_literal: true
+
+require "dependabot/devcontainers/requirement"
+require "dependabot/file_parsers/base"
+require "dependabot/shared_helpers"
+require "dependabot/dependency"
+require "json"
+require "uri"
+
+module Dependabot
+  module Devcontainers
+    class FileParser < Dependabot::FileParsers::Base
+      class FeatureDependencyParser
+        def initialize(config_dependency_file:, repo_contents_path:, credentials:)
+          @config_dependency_file = config_dependency_file
+          @repo_contents_path = repo_contents_path
+          @credentials = credentials
+        end
+
+        def parse
+          SharedHelpers.in_a_temporary_repo_directory(base_dir, repo_contents_path) do
+            SharedHelpers.with_git_configured(credentials: credentials) do
+              parse_cli_json(evaluate_with_cli)
+            end
+          end
+        end
+
+        private
+
+        def base_dir
+          File.dirname(config_dependency_file.path)
+        end
+
+        def config_name
+          File.basename(config_dependency_file.path)
+        end
+
+        def config_contents
+          config_dependency_file.content
+        end
+
+        # https://github.com/devcontainers/cli/blob/9444540283b236298c28f397dea879e7ec222ca1/src/spec-node/devContainersSpecCLI.ts#L1072
+        def evaluate_with_cli
+          raise "config_name must be a string" unless config_name.is_a?(String) && !config_name.empty?
+
+          cmd = "devcontainer outdated --workspace-folder . --config #{config_name} --output-format json"
+          Dependabot.logger.info("Running command: #{cmd}")
+
+          json = SharedHelpers.run_shell_command(
+            cmd,
+            stderr_to_stdout: false
+          )
+
+          JSON.parse(json)
+        end
+
+        def parse_cli_json(json)
+          dependencies = []
+
+          features = json["features"]
+          features.each do |feature, versions_object|
+            name, requirement = feature.split(":")
+
+            # Skip sha pinned tags for now. Ideally the devcontainers CLI would give us updated SHA info
+            next if name.end_with?("@sha256")
+
+            # Skip deprecated features until `devcontainer features info tag`
+            # and `devcontainer upgrade` work with them. See https://github.com/devcontainers/cli/issues/712
+            next unless name.include?("/")
+
+            current = versions_object["current"]
+
+            dep = Dependency.new(
+              name: name,
+              version: current,
+              package_manager: "devcontainers",
+              requirements: [
+                {
+                  requirement: requirement,
+                  file: config_dependency_file.name,
+                  groups: ["feature"],
+                  source: nil
+                }
+              ]
+            )
+
+            dependencies << dep
+          end
+          dependencies
+        end
+
+        attr_reader :config_dependency_file, :repo_contents_path, :credentials
+      end
+    end
+  end
+end

devcontainers/lib/dependabot/devcontainers/file_updater.rb

@@ -1,12 +1,83 @@
-# typed: strong
+# typed: true
 # frozen_string_literal: true
 
 require "dependabot/file_updaters"
 require "dependabot/file_updaters/base"
+require "dependabot/devcontainers/file_updater/config_updater"
 
 module Dependabot
   module Devcontainers
     class FileUpdater < Dependabot::FileUpdaters::Base
+      def self.updated_files_regex
+        [
+          /^\.?devcontainer\.json$/,
+          /^\.?devcontainer-lock\.json$/
+        ]
+      end
+
+      def updated_dependency_files
+        updated_files = []
+
+        manifests.each do |manifest|
+          requirement = dependency.requirements.find { |req| req[:file] == manifest.name }
+          next unless requirement
+
+          config_contents, lockfile_contents = update(manifest, requirement)
+
+          updated_files << updated_file(file: manifest, content: config_contents) if file_changed?(manifest)
+
+          lockfile = lockfile_for(manifest)
+
+          updated_files << updated_file(file: lockfile, content: lockfile_contents) if lockfile && lockfile_contents
+        end
+
+        updated_files
+      end
+
+      private
+
+      def dependency
+        # TODO: Handle one dependency at a time
+        dependencies.first
+      end
+
+      def check_required_files
+        return if dependency_files.any?
+
+        raise "No dev container configuration!"
+      end
+
+      def manifests
+        @manifests ||= dependency_files.select do |f|
+          f.name.end_with?("devcontainer.json")
+        end
+      end
+
+      def lockfile_for(manifest)
+        lockfile_name = lockfile_name_for(manifest)
+
+        dependency_files.find do |f|
+          f.name == lockfile_name
+        end
+      end
+
+      def lockfile_name_for(manifest)
+        basename = File.basename(manifest.name)
+        lockfile_name = Utils.expected_lockfile_name(basename)
+
+        manifest.name.delete_suffix(basename).concat(lockfile_name)
+      end
+
+      def update(manifest, requirement)
+        ConfigUpdater.new(
+          feature: dependency.name,
+          requirement: requirement[:requirement],
+          version: dependency.version,
+          manifest: manifest,
+          repo_contents_path: repo_contents_path,
+          credentials: credentials
+        ).update
+      end
     end
   end
 end

devcontainers/lib/dependabot/devcontainers/file_updater/config_updater.rb

@@ -0,0 +1,78 @@
+# typed: true
+# frozen_string_literal: true
+
+require "dependabot/file_updaters/base"
+require "dependabot/shared_helpers"
+require "dependabot/logger"
+require "dependabot/devcontainers/utils"
+
+module Dependabot
+  module Devcontainers
+    class FileUpdater < Dependabot::FileUpdaters::Base
+      class ConfigUpdater
+        def initialize(feature:, requirement:, version:, manifest:, repo_contents_path:, credentials:)
+          @feature = feature
+          @requirement = requirement
+          @version = version
+          @manifest = manifest
+          @repo_contents_path = repo_contents_path
+          @credentials = credentials
+        end
+
+        def update
+          SharedHelpers.in_a_temporary_repo_directory(base_dir, repo_contents_path) do
+            SharedHelpers.with_git_configured(credentials: credentials) do
+              update_manifests(
+                target_requirement: requirement,
+                target_version: version
+              )
+
+              [File.read(manifest_name), File.read(lockfile_name)].compact
+            end
+          end
+        end
+
+        private
+
+        def base_dir
+          File.dirname(manifest.path)
+        end
+
+        def manifest_name
+          File.basename(manifest.path)
+        end
+
+        def lockfile_name
+          Utils.expected_lockfile_name(manifest_name)
+        end
+
+        def update_manifests(target_requirement:, target_version:)
+          # First force target version to upgrade lockfile.
+          run_devcontainer_upgrade(target_version)
+
+          # Now replace specific version back with target requirement
+          force_target_requirement(manifest_name, from: target_version, to: target_requirement)
+          force_target_requirement(lockfile_name, from: target_version, to: target_requirement)
+        end
+
+        def force_target_requirement(file_name, from:, to:)
+          File.write(file_name, File.read(file_name).gsub("#{feature}:#{from}", "#{feature}:#{to}"))
+        end
+
+        def run_devcontainer_upgrade(target_version)
+          cmd = "devcontainer upgrade " \
+                "--workspace-folder . " \
+                "--feature #{feature} " \
+                "--config #{manifest_name} " \
+                "--target-version #{target_version}"
+
+          Dependabot.logger.info("Running command: `#{cmd}`")
+
+          SharedHelpers.run_shell_command(cmd, stderr_to_stdout: false)
+        end
+
+        attr_reader :feature, :requirement, :version, :manifest, :repo_contents_path, :credentials
+      end
+    end
+  end
+end