feat: add support for @composeDirective (#3)

Co-authored-by: Yannick Utard <yannickutard@gmail.com>

.github/workflows/semantic-pr-title.yml

@@ -0,0 +1,48 @@
+name: "Semantic PR Title"
+
+on:
+  pull_request:
+    branches:
+      - main
+    types:
+      - opened
+      - edited
+      - synchronize
+      - reopened
+
+permissions:
+  pull-requests: write
+
+jobs:
+  main:
+    name: Validate PR title
+    runs-on: ubuntu-latest
+    steps:
+      - uses: amannn/action-semantic-pull-request@v5
+        id: lint_pr_title
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: marocchino/sticky-pull-request-comment@v2
+        # When the previous steps fails, the workflow would stop. By adding this
+        # condition you can continue the execution with the populated error message.
+        if: always() && (steps.lint_pr_title.outputs.error_message != null)
+        with:
+          header: pr-title-lint-error
+          message: |
+            Hey there and thank you for opening this pull request! 👋🏼
+            
+            We require pull request titles to follow the [Conventional Commits specification](https://www.conventionalcommits.org/en/v1.0.0/) and it looks like your proposed title needs to be adjusted.
+
+            Details:
+            
+            ```
+            ${{ steps.lint_pr_title.outputs.error_message }}
+            ```
+
+      # Delete a previous comment when the issue has been resolved
+      - if: ${{ steps.lint_pr_title.outputs.error_message == null }}
+        uses: marocchino/sticky-pull-request-comment@v2
+        with:
+          header: pr-title-lint-error
+          delete: true

lib/apollo-federation/federated_document_from_schema_definition.rb

@@ -100,8 +100,8 @@ def merge_directives(node, type)
     end
 
     def directive_name(directive)
-      if schema.federation_2? && !Schema::IMPORTED_DIRECTIVES.include?(directive[:name])
-        "#{schema.link_namespace}__#{directive[:name]}"
+      if schema.federation_2? && schema.all_links.none? { |link| link[:import]&.include?(directive[:name]) }
+        "#{schema.default_link_namespace}__#{directive[:name]}"
       else
         directive[:name]
       end

lib/apollo-federation/schema.rb

@@ -7,7 +7,7 @@
 
 module ApolloFederation
   module Schema
-    IMPORTED_DIRECTIVES = ['inaccessible', 'policy', 'tag'].freeze
+    IMPORTED_DIRECTIVES = ['composeDirective', 'inaccessible', 'policy', 'tag'].freeze
 
     def self.included(klass)
       klass.extend(CommonMethods)
@@ -16,9 +16,11 @@ def self.included(klass)
     module CommonMethods
       DEFAULT_LINK_NAMESPACE = 'federation'
 
-      def federation(version: '1.0', link: {})
+      def federation(version: '1.0', default_link_namespace: nil, links: [], compose_directives: [])
         @federation_version = version
-        @link = { as: DEFAULT_LINK_NAMESPACE }.merge(link)
+        @default_link_namespace = default_link_namespace
+        @links = links
+        @compose_directives = compose_directives
       end
 
       def federation_version
@@ -37,8 +39,8 @@ def federation_sdl(context: nil)
         output
       end
 
-      def link_namespace
-        @link ? @link[:as] : find_inherited_value(:link_namespace)
+      def default_link_namespace
+        @default_link_namespace || find_inherited_value(:default_link_namespace, DEFAULT_LINK_NAMESPACE)
       end
 
       def query(new_query_object = nil)
@@ -53,20 +55,53 @@ def query(new_query_object = nil)
         federation_query_object
       end
 
+      def compose_directives
+        @compose_directives || find_inherited_value(:compose_directives, [])
+      end
+
+      def links
+        @links || find_inherited_value(:links, [])
+      end
+
+      def all_links
+        imported_directives = IMPORTED_DIRECTIVES
+        default_link = {
+          url: "https://specs.apollo.dev/federation/v#{federation_version}",
+          import: imported_directives,
+        }
+        default_link[:as] = default_link_namespace if default_link_namespace != DEFAULT_LINK_NAMESPACE
+        [default_link, *links]
+      end
+
       private
 
       def original_query
         @orig_query_object || find_inherited_value(:original_query)
       end
 
       def federation_2_prefix
-        federation_namespace = ", as: \"#{link_namespace}\"" if link_namespace != DEFAULT_LINK_NAMESPACE
+        schema = ['extend schema']
+
+        all_links.each do |link|
+          link_str = '  @link('
+          link_str += "url: \"#{link[:url]}\""
+          link_str += ", as: \"#{link[:as]}\"" if link[:as]
+          if link[:import]
+            imported_directives = link[:import].map { |d| "\"@#{d}\"" }.join(', ')
+            link_str += ", import: [#{imported_directives}]"
+          end
+          link_str += ')'
+          schema << link_str
+        end
+
+        compose_directives.each do |directive|
+          schema << "  @composeDirective(name: \"@#{directive}\")"
+        end
 
-        <<~SCHEMA
-          extend schema
-            @link(url: "https://specs.apollo.dev/federation/v#{federation_version}"#{federation_namespace}, import: [#{(IMPORTED_DIRECTIVES.map { |directive| "\"@#{directive}\"" }).join(', ')}])
+        schema << ''
+        schema << ''
 
-        SCHEMA
+        schema.join("\n")
       end
 
       def schema_entities