feat: add ignoreNoDocuments flag and config option (#8040)

* feat: add new ignoreNoDocuments config and cli flag

* docs: add ignoreNoDocuments flag

.changeset/shiny-items-kiss.md

@@ -0,0 +1,19 @@
+---
+'@graphql-codegen/plugin-helpers': minor
+'@graphql-codegen/cli': minor
+---
+
+Add new config option to not exit with non-zero exit code when there are no documents.
+
+You can use this option in your config:
+```yaml
+schema: 'schema.graphql'
+documents:
+  - 'src/**/*.graphql'
+ignoreNoDocuments: true
+```
+
+Alternative you can use the CLI to set this option:
+```bash
+$ codegen --config-file=config.yml --ignore-no-documents
+```

packages/graphql-codegen-cli/src/config.ts

@@ -30,6 +30,7 @@ export type YamlCliFlags = {
   silent: boolean;
   errorsOnly: boolean;
   profile: boolean;
+  ignoreNoDocuments?: boolean;
 };
 
 export function generateSearchPlaces(moduleName: string) {
@@ -281,6 +282,11 @@ export function updateContextWithCliFlags(context: CodegenContext, cliFlags: Yam
     config.errorsOnly = cliFlags.errorsOnly;
   }
 
+  if (cliFlags['ignore-no-documents'] !== undefined) {
+    // for some reason parsed value is `'false'` string so this ensure it always is a boolean.
+    config.ignoreNoDocuments = cliFlags['ignore-no-documents'] === true;
+  }
+
   if (cliFlags.project) {
     context.useProject(cliFlags.project);
   }

packages/graphql-codegen-cli/src/load.ts

@@ -58,16 +58,16 @@ export async function loadSchema(
 
         ${e.message || e}
         ${e.stack || ''}
-    
+
         GraphQL Code Generator supports:
           - ES Modules and CommonJS exports (export as default or named export "schema")
           - Introspection JSON File
           - URL of GraphQL endpoint
           - Multiple files with type definitions (glob expression)
           - String in config file
-    
+
         Try to use one of above options and run codegen again.
-    
+
       `
     );
   }
@@ -97,13 +97,17 @@ export async function loadDocuments(
     ignore.push(join(process.cwd(), generatePath));
   }
 
-  const loadedFromToolkit = await loadDocumentsToolkit(documentPointers, {
-    ...defaultDocumentsLoadOptions,
-    ignore,
-    loaders,
-    ...config,
-    ...config.config,
-  });
-
-  return loadedFromToolkit;
+  try {
+    const loadedFromToolkit = await loadDocumentsToolkit(documentPointers, {
+      ...defaultDocumentsLoadOptions,
+      ignore,
+      loaders,
+      ...config,
+      ...config.config,
+    });
+    return loadedFromToolkit;
+  } catch (error) {
+    if (config.ignoreNoDocuments) return [];
+    throw error;
+  }
 }

packages/graphql-codegen-cli/tests/cli-flags.spec.ts

@@ -120,6 +120,34 @@ describe('CLI Flags', () => {
     expect(config.watch).toBeFalsy();
   });
 
+  it('Should overwrite ignoreNoDocuments config using cli flags to false', async () => {
+    mockConfig(`
+        schema: schema.graphql
+        ignoreNoDocuments: true
+        generates:
+            file.ts:
+                - plugin
+    `);
+    const args = createArgv('--ignore-no-documents=false');
+    const context = await createContext(parseArgv(args));
+    const config = context.getConfig();
+    expect(config.ignoreNoDocuments).toBeFalsy();
+  });
+
+  it('Should overwrite ignoreNoDocuments config using cli flags to true', async () => {
+    mockConfig(`
+        schema: schema.graphql
+        ignoreNoDocuments: false
+        generates:
+            file.ts:
+                - plugin
+    `);
+    const args = createArgv('--ignore-no-documents');
+    const context = await createContext(parseArgv(args));
+    const config = context.getConfig();
+    expect(config.ignoreNoDocuments).toBeTruthy();
+  });
+
   it('Should set --overwrite with new YML api', async () => {
     mockConfig(`
         schema: schema.graphql

packages/utils/plugins-helpers/src/types.ts

@@ -433,6 +433,10 @@ export namespace Types {
       usePolling: boolean;
       interval?: number;
     };
+    /**
+     * @description A flag to suppress non-zero exit code when there are no documents to generate.
+     */
+    ignoreNoDocuments?: boolean;
     /**
      * @description A flag to suppress printing errors when they occur.
      */

website/docs/config-reference/codegen-config.mdx

@@ -77,6 +77,8 @@ Here are the supported options that you can define in the config file (see [sour
 
 - **`silent`** - A flag to suppress printing errors when they occur.
 
+- **`ignoreNoDocuments`** - A flag to not exit with non-zero exit code when there are no documents.
+
 - **`errorsOnly`** - A flag to suppress printing anything except errors.
 
 - **`hooks`** - Specifies scripts to run when events are happening in the codegen's core. You can read more about lifecycle hooks [here](./lifecycle-hooks). You can specify this on your root configuration or on each output.