release: v2.0.0

[Himenon]

Summary

This PR consolidates major architectural updates and improvements previously discussed and implemented in #141 and #144. It aims to achieve zero runtime dependencies and provide a modern development experience with subpath exports.

From #141: Complete Removal of TypeScript AST Dependency

• Replaced the TypeScript Compiler API (AST) with a string template-based approach for code generation.
• Achieved zero runtime dependencies by removing the typescript package from src/.
• Simplified internal logic and improved portability of the generated code.

From #144: Support for Subpath Exports

• Implemented Node.js Subpath Exports in package.json to allow cleaner import paths.
• Updated all internal references, READMEs, and examples to use the new paths (removing the /dist/ prefix).
• Improved type resolution support in modern TypeScript environments.

Breaking Changes & Migration Guide

1. Import Path Changes

Subpath exports are now supported. You should remove the /dist/ prefix from your import paths.

- import * as Templates from "@himenon/openapi-typescript-code-generator/dist/templates";
- import type * as Types from "@himenon/openapi-typescript-code-generator/dist/types";
- import { TsGenerator } from "@himenon/openapi-typescript-code-generator/dist/api";
+ import * as Templates from "@himenon/openapi-typescript-code-generator/templates";
+ import type * as Types from "@himenon/openapi-typescript-code-generator/types";
+ import { TsGenerator } from "@himenon/openapi-typescript-code-generator/api";

2. Type Definition Changes

The IntermediateCode type has been simplified from a union type to a strict string.

- // Old: string | ts.Statement
- const code: Types.CodeGenerator.IntermediateCode = ts.factory.createIdentifier("...");
+ // New: string
+ const code: Types.CodeGenerator.IntermediateCode = "const x = 1;";

3. Internal Factory API Overhaul

The internal TypeScript AST factory wrapper (TsGenerator.Factory) has been replaced with a string-based factory.

const factory = TsGenerator.Factory.create();

- // Old: returns ts.InterfaceDeclaration
- const node = factory.InterfaceDeclaration.create({ ... });
+ // New: returns string
+ const node = factory.InterfaceDeclaration.create({ ... });

Changes Summary

• Refactoring: Consolidated 44 individual factory files into a single optimized entry point.
• Documentation: Updated README.md and docs/ja/README-ja.md to reflect the new API and import paths.

Test Plan

# Verify no typescript dependency in src/
grep -r "from \"typescript\"" src/

# Run all tests (including new snapshots and functional tests)
pnpm test

# Verify code generation with examples
pnpm test:code:gen:class
pnpm test:code:gen:function
pnpm test:code:gen:currying-function

All tests have been verified to pass successfully in the local environment.