feat: add casing support for generated filenames

This allows users to control the naming convention of generated resolver files,
supporting common filename formats, while preserving original default functionality.

Details:

- Add change-case-all dependency to typescript-resolver-files package
- Add fileOutputCasing config option with 'pascal-case' (default) and other casing support
- Update preset config validation to include fileOutputCasing option
- Add transformResolverFileName utility to convert resolver names to appropriate filename casing
- Integrate filename transformation throughout the resolver generation pipeline
- Add unit test coverage for filename transformation functionality
- Add e2e test suite
- Update documentation in README.md

Author: jruhland

packages/typescript-resolver-files-e2e/project.json

@@ -165,6 +165,13 @@
             "rimraf -g \"{projectRoot}/src/test-complex-synth-generic-wrapper/**/*.generated.*\""
           ],
           "parallel": false
+        },
+        "test-resolver-filename-case": {
+          "commands": [
+            "rimraf -g \"{projectRoot}/src/test-resolver-filename-case/**/resolvers/\"",
+            "rimraf -g \"{projectRoot}/src/test-resolver-filename-case/**/*.generated.*\""
+          ],
+          "parallel": false
         }
       }
     },
@@ -191,7 +198,8 @@
           "nx graphql-codegen typescript-resolver-files-e2e -c test-resolvers-auto-wireup --verbose",
           "nx graphql-codegen typescript-resolver-files-e2e -c test-federation --verbose",
           "nx graphql-codegen typescript-resolver-files-e2e -c test-deep-modules --verbose",
-          "nx graphql-codegen typescript-resolver-files-e2e -c test-complex-synth-generic-wrapper --verbose"
+          "nx graphql-codegen typescript-resolver-files-e2e -c test-complex-synth-generic-wrapper --verbose",
+          "nx graphql-codegen typescript-resolver-files-e2e -c test-resolver-filename-case --verbose"
         ],
         "parallel": false
       },
@@ -269,6 +277,9 @@
         },
         "test-complex-synth-generic-wrapper": {
           "configFile": "{projectRoot}/src/test-complex-synth-generic-wrapper/codegen.ts"
+        },
+        "test-resolver-filename-case": {
+          "configFile": "{projectRoot}/src/test-resolver-filename-case/codegen.ts"
         }
       },
       "dependsOn": ["prepare-e2e-modules"]

packages/typescript-resolver-files-e2e/src/test-resolver-filename-case/codegen.ts

@@ -0,0 +1,24 @@
+import type { CodegenConfig } from '@graphql-codegen/cli';
+import { defineConfig } from '@eddeee888/gcg-typescript-resolver-files';
+
+const config: CodegenConfig = {
+  hooks: {
+    afterAllFileWrite: ['prettier --write'],
+  },
+  generates: {
+    'packages/typescript-resolver-files-e2e/src/test-resolver-filename-case/graphql/schemas':
+      defineConfig(
+        {
+          fileOutputCasing: 'kebab-case',
+        },
+        {
+          schema: [
+            'packages/typescript-resolver-files-e2e/src/test-resolver-filename-case/graphql/schemas/**/*.graphqls',
+            'packages/typescript-resolver-files-e2e/src/test-resolver-filename-case/graphql/schemas/**/*.graphqls.ts',
+          ],
+        }
+      ),
+  },
+};
+
+export default config;

packages/typescript-resolver-files-e2e/src/test-resolver-filename-case/graphql/schemas/base.graphqls

@@ -0,0 +1,20 @@
+scalar DateTime
+
+type Query {
+  # Simple: "query" -> "query.ts"
+  query: RandomResult!
+  # Strange: "api-query.ts"
+  APIQuery: RandomResult!
+}
+
+type Mutation {
+  # Strange: "prefixed-api-mutation.ts"
+  prefixedAPIMutation: RandomResult!
+}
+
+type RandomResult {
+  id: ID!
+  name: String!
+  createdAt: DateTime!
+  updatedAt: DateTime!
+}

packages/typescript-resolver-files-e2e/src/test-resolver-filename-case/graphql/schemas/resolvers.generated.ts

@@ -0,0 +1,25 @@
+/* This file was automatically generated. DO NOT UPDATE MANUALLY. */
+import type { Resolvers } from './types.generated';
+import { APIQuery as Query_APIQuery } from './resolvers/Query/api-query';
+import { query as Query_query } from './resolvers/Query/query';
+import { user as Query_user } from './resolvers/Query/user';
+import { userProfile as Query_userProfile } from './resolvers/Query/user-profile';
+import { prefixedAPIMutation as Mutation_prefixedAPIMutation } from './resolvers/Mutation/prefixed-api-mutation';
+import { RandomResult } from './resolvers/random-result';
+import { User } from './resolvers/user';
+import { UserProfile } from './resolvers/user-profile';
+import { DateTimeResolver } from 'graphql-scalars';
+export const resolvers: Resolvers = {
+  Query: {
+    APIQuery: Query_APIQuery,
+    query: Query_query,
+    user: Query_user,
+    userProfile: Query_userProfile,
+  },
+  Mutation: { prefixedAPIMutation: Mutation_prefixedAPIMutation },
+
+  RandomResult: RandomResult,
+  User: User,
+  UserProfile: UserProfile,
+  DateTime: DateTimeResolver,
+};

packages/typescript-resolver-files-e2e/src/test-resolver-filename-case/graphql/schemas/resolvers/Mutation/prefixed-api-mutation.ts

@@ -0,0 +1,6 @@
+import type { MutationResolvers } from './../../types.generated';
+export const prefixedAPIMutation: NonNullable<
+  MutationResolvers['prefixedAPIMutation']
+> = async (_parent, _arg, _ctx) => {
+  /* Implement Mutation.prefixedAPIMutation resolver logic here */
+};

packages/typescript-resolver-files-e2e/src/test-resolver-filename-case/graphql/schemas/resolvers/Query/api-query.ts

@@ -0,0 +1,8 @@
+import type { QueryResolvers } from './../../types.generated';
+export const APIQuery: NonNullable<QueryResolvers['APIQuery']> = async (
+  _parent,
+  _arg,
+  _ctx
+) => {
+  /* Implement Query.APIQuery resolver logic here */
+};

packages/typescript-resolver-files-e2e/src/test-resolver-filename-case/graphql/schemas/resolvers/Query/query.ts

@@ -0,0 +1,8 @@
+import type { QueryResolvers } from './../../types.generated';
+export const query: NonNullable<QueryResolvers['query']> = async (
+  _parent,
+  _arg,
+  _ctx
+) => {
+  /* Implement Query.query resolver logic here */
+};

packages/typescript-resolver-files-e2e/src/test-resolver-filename-case/graphql/schemas/resolvers/Query/user-profile.ts

@@ -0,0 +1,8 @@
+import type { QueryResolvers } from './../../types.generated';
+export const userProfile: NonNullable<QueryResolvers['userProfile']> = async (
+  _parent,
+  _arg,
+  _ctx
+) => {
+  /* Implement Query.userProfile resolver logic here */
+};

packages/typescript-resolver-files-e2e/src/test-resolver-filename-case/graphql/schemas/resolvers/Query/user.ts

@@ -0,0 +1,8 @@
+import type { QueryResolvers } from './../../types.generated';
+export const user: NonNullable<QueryResolvers['user']> = async (
+  _parent,
+  _arg,
+  _ctx
+) => {
+  /* Implement Query.user resolver logic here */
+};

packages/typescript-resolver-files-e2e/src/test-resolver-filename-case/graphql/schemas/resolvers/random-result.ts

@@ -0,0 +1,4 @@
+import type { RandomResultResolvers } from './../types.generated';
+export const RandomResult: RandomResultResolvers = {
+  /* Implement RandomResult resolver logic here */
+};