Handle federation v2 links

.changeset/@graphql-tools_import-7229-dependencies.md

@@ -0,0 +1,5 @@
+---
+"@graphql-tools/import": patch
+---
+dependencies updates:
+  - Added dependency [`@theguild/federation-composition@^0.18.3` ↗︎](https://www.npmjs.com/package/@theguild/federation-composition/v/0.18.3) (to `dependencies`)

.changeset/strong-melons-cry.md

@@ -0,0 +1,5 @@
+---
+'@graphql-tools/import': patch
+---
+
+Adjust dependency and definition logic to include federated links

packages/import/package.json

@@ -52,6 +52,7 @@
   },
   "dependencies": {
     "@graphql-tools/utils": "^10.8.6",
+    "@theguild/federation-composition": "^0.18.3",
     "resolve-from": "5.0.0",
     "tslib": "^2.4.0"
   },

packages/import/src/index.ts

@@ -39,22 +39,21 @@ import {
 } from 'graphql';
 import resolveFrom from 'resolve-from';
 import { parseGraphQLSDL } from '@graphql-tools/utils';
+import { extractLinkImplementations } from '@theguild/federation-composition';
 
 const builtinTypes = ['String', 'Float', 'Int', 'Boolean', 'ID', 'Upload'];
 
+const federationV1Directives = ['key', 'provides', 'requires', 'external'];
+
 const builtinDirectives = [
   'deprecated',
   'skip',
   'include',
   'cacheControl',
-  'key',
-  'external',
-  'requires',
-  'provides',
   'connection',
   'client',
   'specifiedBy',
-  'link',
+  ...federationV1Directives,
 ];
 
 const IMPORT_FROM_REGEX = /^import\s+(\*|(.*))\s+from\s+('|")(.*)('|");?$/;
@@ -264,6 +263,66 @@ export function extractDependencies(
   };
 }
 
+function importFederatedSchemaLinks(
+  definition: DefinitionNode,
+  definitionsByName: Map<string, Set<DefinitionNode>>,
+) {
+  const addDefinition = (name: string) => {
+    definitionsByName.set(name.replace(/^@/g, ''), new Set());
+  };
+
+  // extract links from this definition
+  const { links, matchesImplementation, resolveImportName } = extractLinkImplementations({
+    kind: Kind.DOCUMENT,
+    definitions: [definition],
+  });
+
+  if (links.length) {
+    const federationUrl = 'https://specs.apollo.dev/federation';
+    const linkUrl = 'https://specs.apollo.dev/link';
+
+    /**
+     * Official Federated imports are special because they can be referenced without specifyin the import.
+     * To handle this case, we must prepare a list of all the possible valid usages to check against.
+     * Note that this versioning is not technically correct, since some definitions are after v2.0.
+     * But this is enough information to be comfortable not blocking the imports at this phase. It's
+     * the job of the composer to validate the versions.
+     * */
+    if (matchesImplementation(federationUrl, 'v2.0')) {
+      const federationImports = [
+        '@composeDirective',
+        '@extends',
+        '@external',
+        '@inaccessible',
+        '@interfaceObject',
+        '@key',
+        '@override',
+        '@provides',
+        '@requires',
+        '@shareable',
+        '@tag',
+        'FieldSet',
+      ];
+      for (const i of federationImports) {
+        addDefinition(resolveImportName(federationUrl, i));
+      }
+    }
+    if (matchesImplementation(linkUrl, 'v1.0')) {
+      const linkImports = ['Purpose', 'Import', '@link'];
+      for (const i of linkImports) {
+        addDefinition(resolveImportName(linkUrl, i));
+      }
+    }
+
+    const imported = links
+      .filter(l => ![linkUrl, federationUrl].includes(l.identity))
+      .flatMap(l => l.imports.map(i => i.as ?? i.name));
+    for (const namedImport of imported) {
+      addDefinition(namedImport);
+    }
+  }
+}
+
 function visitDefinition(
   definition: DefinitionNode,
   definitionsByName: Map<string, Set<DefinitionNode>>,
@@ -288,6 +347,7 @@ function visitDefinition(
       dependencySet = new Set();
       dependenciesByDefinitionName.set(definitionName, dependencySet);
     }
+
     switch (definition.kind) {
       case Kind.OPERATION_DEFINITION:
         visitOperationDefinitionNode(definition, dependencySet);
@@ -317,9 +377,11 @@ function visitDefinition(
         visitScalarDefinitionNode(definition, dependencySet);
         break;
       case Kind.SCHEMA_DEFINITION:
+        importFederatedSchemaLinks(definition, definitionsByName);
         visitSchemaDefinitionNode(definition, dependencySet);
         break;
       case Kind.SCHEMA_EXTENSION:
+        importFederatedSchemaLinks(definition, definitionsByName);
         visitSchemaExtensionDefinitionNode(definition, dependencySet);
         break;
       case Kind.OBJECT_TYPE_EXTENSION:

packages/import/tests/schema/fixtures/directive/h.graphql

@@ -1,8 +1,12 @@
-extend schema @link(url: "https://the-guild.dev/graphql/tools", import: ["@foo"])
+extend schema
+  @link(url: "https://specs.apollo.dev/link/v1.0")
+  @link(url: "https://specs.apollo.dev/federation/v2.0", import: ["@key"])
+  @link(url: "https://the-guild.dev/graphql/tools", import: ["@foo"])
 
 directive @foo on FIELD_DEFINITION
 
 extend type User @key(fields: "id") {
   id: ID!
   email: String @foo
+  ssn: String @federation__tag(name: "private")
 }

packages/import/tests/schema/import-schema.spec.ts

@@ -469,13 +469,17 @@ describe('importSchema', () => {
 
   test('importSchema: link directive', () => {
     const expectedSDL = /* GraphQL */ `
-      extend schema @link(url: "https://the-guild.dev/graphql/tools", import: ["@foo"])
+      extend schema
+        @link(url: "https://specs.apollo.dev/link/v1.0")
+        @link(url: "https://specs.apollo.dev/federation/v2.0", import: ["@key"])
+        @link(url: "https://the-guild.dev/graphql/tools", import: ["@foo"])
 
       directive @foo on FIELD_DEFINITION
 
       extend type User @key(fields: "id") {
         id: ID!
         email: String @foo
+        ssn: String @federation__tag(name: "private")
       }
     `;
     expect(importSchema('./fixtures/directive/h.graphql')).toBeSimilarGqlDoc(expectedSDL);

yarn.lock

@@ -3062,6 +3062,16 @@
     tailwind-merge "^2.5.2"
     unist-util-visit "5.0.0"
 
+"@theguild/federation-composition@^0.18.3":
+  version "0.18.3"
+  resolved "https://registry.yarnpkg.com/@theguild/federation-composition/-/federation-composition-0.18.3.tgz#7e475b7834f4fd0b4e5139f22b31eeaf763fdce8"
+  integrity sha512-UGa3R3JMDHzoKi6k32kq/bB8SbZrkkxLrfinuEPcsv0sU8r1CW+4jwCBbQGC5vnoU9asg+MuCjMYpLZSOJS/dw==
+  dependencies:
+    constant-case "^3.0.4"
+    debug "4.4.0"
+    json5 "^2.2.3"
+    lodash.sortby "^4.7.0"
+
 "@theguild/prettier-config@3.0.1":
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/@theguild/prettier-config/-/prettier-config-3.0.1.tgz#83b662197277a0de8a211c09cd43fd4cc59be614"
@@ -4983,6 +4993,15 @@ consola@^3.0.0:
   resolved "https://registry.yarnpkg.com/consola/-/consola-3.4.2.tgz#5af110145397bb67afdab77013fdc34cae590ea7"
   integrity sha512-5IKcdX0nnYavi6G7TtOhwkYzyjfJlatbjMjuLSfE2kYT5pMDOilZ4OvMhi637CcDICTmz3wARPoyhqyX1Y+XvA==
 
+constant-case@^3.0.4:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/constant-case/-/constant-case-3.0.4.tgz#3b84a9aeaf4cf31ec45e6bf5de91bdfb0589faf1"
+  integrity sha512-I2hSBi7Vvs7BEuJDr5dDHfzb/Ruj3FyvFyh7KLilAjNQw3Be+xgqUBA2W6scVEcL0hL1dwPRtIqEPVUCKkSsyQ==
+  dependencies:
+    no-case "^3.0.4"
+    tslib "^2.0.3"
+    upper-case "^2.0.2"
+
 content-disposition@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-1.0.0.tgz#844426cb398f934caefcbb172200126bc7ceace2"
@@ -5464,6 +5483,13 @@ debug@4, debug@^4.0.0, debug@^4.1.0, debug@^4.1.1, debug@^4.3.1, debug@^4.3.2, d
   dependencies:
     ms "^2.1.3"
 
+debug@4.4.0:
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.4.0.tgz#2b3f2aea2ffeb776477460267377dc8710faba8a"
+  integrity sha512-6WTZ/IxCY/T6BALoZHaE4ctp9xm+Z5kY/pzYaCHRFeyVhojxlrm+46y68HA6hr0TcwEssoxNiDEUJQjfPZ/RYA==
+  dependencies:
+    ms "^2.1.3"
+
 debug@^3.2.7:
   version "3.2.7"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.2.7.tgz#72580b7e9145fb39b6676f9c5e5fb100b934179a"
@@ -12325,6 +12351,13 @@ update-browserslist-db@^1.1.3:
     escalade "^3.2.0"
     picocolors "^1.1.1"
 
+upper-case@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/upper-case/-/upper-case-2.0.2.tgz#d89810823faab1df1549b7d97a76f8662bae6f7a"
+  integrity sha512-KgdgDGJt2TpuwBUIjgG6lzw2GWFRCW9Qkfkiv0DxqHHLYJHmtmdUIKcZd8rHgFSjopVTlw6ggzCm1b8MFQwikg==
+  dependencies:
+    tslib "^2.0.3"
+
 uri-js@^4.2.2:
   version "4.4.1"
   resolved "https://registry.yarnpkg.com/uri-js/-/uri-js-4.4.1.tgz#9b1a52595225859e55f669d928f88c6c57f2a77e"