# @git.zone/tsbuild

A powerful, modern TypeScript build tool with smart defaults, full tsconfig.json support, and automatic output directory management. 🚀

## Issue Reporting and Security

For reporting bugs, issues, or security vulnerabilities, please visit [community.foss.global/](https://community.foss.global/). This is the central community hub for all issue reporting. Developers who sign and comply with our contribution agreement and go through identification can also get a [code.foss.global/](https://code.foss.global/) account to submit Pull Requests directly.

## 📦 Install

```bash
# Using pnpm (recommended)
pnpm install @git.zone/tsbuild --save-dev

# Using npm
npm install @git.zone/tsbuild --save-dev
```

## ⚡ Why tsbuild?

| Feature | Description |
|---------|-------------|
| 🔧 **Smart tsconfig.json Integration** | Respects all your compiler options with intelligent merging |
| 🛡️ **Protected Defaults** | Critical build settings are safeguarded while staying flexible |
| 🎯 **Zero Config** | Works perfectly without tsconfig.json |
| 🌐 **Glob Pattern Support** | Compile multiple directories with a single command |
| 📊 **Dependency-Aware** | Automatically orders compilation based on module dependencies |
| ✅ **Type Checking** | Validate code without emitting files |
| 🧹 **Clean Builds** | Automatically clears output directories before compilation |
| 📁 **Auto-Unpack** | Flattens nested output directories automatically |
| 🔄 **CI/CD Ready** | JSON output mode and proper exit codes |
| ✨ **Modern Defaults** | ESNext, NodeNext modules, decorators out of the box |

## 🚀 Quick Start

### CLI Usage

**Compile your TypeScript project:**
```bash
npx tsbuild
```
Compiles `./ts/**/*.ts` to `./dist_ts/`

**Custom directories:**
```bash
npx tsbuild custom src utils
```
Compiles:
- `./src/**/*.ts` → `./dist_src/`
- `./utils/**/*.ts` → `./dist_utils/`

**Auto-discover and compile in dependency order:**
```bash
npx tsbuild tsfolders
```
Finds all `ts_*` folders and compiles them respecting dependencies.

### Programmatic Usage

**Basic compilation:**
```typescript
import { TsCompiler } from '@git.zone/tsbuild';

const compiler = new TsCompiler();
await compiler.compileFilesOrThrow([
  './src/index.ts',
  './src/utils.ts'
], { outDir: './dist' });
```

**Production-ready with error tracking (recommended):**
```typescript
import { TsCompiler } from '@git.zone/tsbuild';

const compiler = new TsCompiler();
const result = await compiler.compileFiles([
  './src/index.ts',
  './src/utils.ts'
], { outDir: './dist' });

if (result.errorSummary.totalErrors > 0) {
  console.error(`Compilation failed with ${result.errorSummary.totalErrors} errors`);
  process.exit(1);
}

console.log(`Compiled ${result.emittedFiles.length} files successfully!`);
```

**Glob pattern compilation:**
```typescript
import { TsCompiler } from '@git.zone/tsbuild';

const compiler = new TsCompiler();
await compiler.compileGlob({
  './ts/**/*.ts': './dist_ts',
  './ts_web/**/*.ts': './dist_web'
});
```

## 🛠️ CLI Commands

### 1. Default Build

```bash
npx tsbuild [options]
```

Compiles all TypeScript files from `./ts/` to `./dist_ts/`

**Options:**
| Flag | Description |
|------|-------------|
| `--skiplibcheck` | Skip type checking of declaration files |
| `--confirmskiplibcheck` | Skip lib check with extended warning (5s pause) |
| `--disallowimplicitany` | Disallow implicit `any` types |
| `--commonjs` | Use CommonJS instead of ESNext modules |
| `--json` | Output results as JSON (for CI/CD) |
| `--quiet` | Suppress console output |

**Examples:**
```bash
# Standard build
npx tsbuild

# Build with JSON output for CI
npx tsbuild --json --quiet

# CommonJS build
npx tsbuild --commonjs

# Strict mode
npx tsbuild --disallowimplicitany
```

### 2. Custom Directories

```bash
npx tsbuild custom <dir1> <dir2> ... [options]
```

Compile specific directories to their corresponding `dist_` folders.

```bash
# Compile src and utils
npx tsbuild custom src utils
# Creates: ./dist_src/ and ./dist_utils/

# Multiple directories with options
npx tsbuild custom api models services --commonjs
```

### 3. TSFolders (Dependency-Aware) 📊

```bash
npx tsbuild tsfolders [options]
```

Automatically discovers and compiles all `ts_*` folders in dependency order:

1. Prioritizes `ts_interfaces` first (if no tspublish.json)
2. Prioritizes `ts_shared` second (if no tspublish.json)
3. Reads `tspublish.json` in each folder for `order` property
4. Compiles in correct sequence

**Example output:**
```
TypeScript Folder Compilation Plan (5 folders)
  1/5 ts_interfaces
  2/5 ts_shared
  3/5 ts_core
  4/5 ts_utils
  5/5 ts_modules
```

### 4. Emit Check ✓

```bash
npx tsbuild emitcheck <file_or_pattern> [more...] [options]
```

Validates TypeScript files can be compiled without actually emitting them.

```bash
# Check specific files
npx tsbuild emitcheck src/main.ts src/utils.ts

# Check with glob patterns
npx tsbuild emitcheck "src/**/*.ts" "test/**/*.ts"
```

**Exit codes:**
- `0` - All files can be emitted
- `1` - One or more files have errors

### 5. Type Check 🔍

```bash
npx tsbuild check [pattern] [more...] [options]
```

Performs type checking without emitting files.

**With arguments:** Check specified files/patterns
```bash
npx tsbuild check "ts/**/*.ts"
npx tsbuild check "src/**/*.ts" "test/**/*.ts"
```

**Without arguments:** Two-phase default check
1. Phase 1: Type check `ts/**/*` (strict, includes .d.ts)
2. Phase 2: Type check `test/**/*` (relaxed, skipLibCheck: true)

```bash
npx tsbuild check
# Running default type checking sequence...
# Checking ts/**/* files...
# Checking test/**/* files with --skiplibcheck...
# All default type checks passed!
```

## 📖 API Reference

### TsCompiler Class

The main class for TypeScript compilation.

```typescript
import { TsCompiler } from '@git.zone/tsbuild';

const compiler = new TsCompiler(cwd?: string, argvArg?: any);
```

**Constructor Parameters:**
- `cwd` - Working directory (defaults to `process.cwd()`)
- `argvArg` - CLI arguments object for flags like `--skiplibcheck`, `--quiet`, etc.

#### compileFiles(fileNames, customOptions?, taskInfo?)

Compile files with error tracking. Returns result instead of throwing.

```typescript
const result = await compiler.compileFiles(
  ['./src/index.ts', './src/utils.ts'],
  { outDir: './dist' }
);

console.log(`Emitted: ${result.emittedFiles.length} files`);
console.log(`Errors: ${result.errorSummary.totalErrors}`);
```

**Returns:** `Promise<ICompileResult>`

```typescript
interface ICompileResult {
  emittedFiles: string[];
  errorSummary: IErrorSummary;
}

interface IErrorSummary {
  errorsByFile: Record<string, Diagnostic[]>;
  generalErrors: Diagnostic[];
  totalErrors: number;
  totalFiles: number;
}
```

#### compileFilesOrThrow(fileNames, customOptions?)

Compile files and throw on error. For simple scripts.

```typescript
try {
  const emittedFiles = await compiler.compileFilesOrThrow(
    ['./src/index.ts'],
    { outDir: './dist' }
  );
  console.log('Compiled:', emittedFiles);
} catch (error) {
  console.error('Compilation failed!');
  process.exit(1);
}
```

**Returns:** `Promise<string[]>` - Array of emitted file paths

#### compileGlob(globPatterns, customOptions?)

Compile multiple glob patterns to different destinations. Automatically clears output directories before compilation and unpacks nested output.

```typescript
const result = await compiler.compileGlob({
  './ts/**/*.ts': './dist_ts',
  './ts_web/**/*.ts': './dist_web',
  './ts_node/**/*.ts': './dist_node'
});
```

**Returns:** `Promise<ICompileResult>`

#### checkTypes(fileNames, customOptions?)

Type check files without emitting. Fast validation.

```typescript
const success = await compiler.checkTypes(['./src/**/*.ts']);

if (!success) {
  console.error('Type errors found!');
  process.exit(1);
}
```

**Returns:** `Promise<boolean>` - `true` if no errors

#### checkEmit(fileNames, customOptions?)

Validate files can be emitted without actually emitting.

```typescript
const canEmit = await compiler.checkEmit(['./src/index.ts']);

if (!canEmit) {
  console.error('Cannot emit these files!');
}
```

**Returns:** `Promise<boolean>` - `true` if can emit

#### createOptions(customOptions?)

Get merged compiler options (useful for debugging).

```typescript
const options = compiler.createOptions({ strict: true });
console.log(options); // Shows merged options
```

### Supporting Classes

#### TsConfig

TypeScript configuration management.

```typescript
import { TsConfig } from '@git.zone/tsbuild';

const config = new TsConfig(process.cwd());
const options = config.merge({ target: 'ES2022' }, argvArg);
```

#### TsPublishConfig

Reads `tspublish.json` for module configuration.

```typescript
import { TsPublishConfig } from '@git.zone/tsbuild';

const pubConfig = new TsPublishConfig('./ts_core');
console.log(pubConfig.shouldUnpack); // true/false
console.log(pubConfig.order);        // number or undefined
```

#### TsUnpacker

Flattens nested TypeScript output directories.

```typescript
import { TsUnpacker } from '@git.zone/tsbuild';

const unpacker = new TsUnpacker('./dist_ts', './ts');
await unpacker.unpack();
```

#### FsHelpers

Static filesystem utilities.

```typescript
import { FsHelpers } from '@git.zone/tsbuild';

const files = await FsHelpers.listFilesWithGlob('./', 'ts/**/*.ts');
const exists = await FsHelpers.fileExists('./tsconfig.json');
const dirExists = await FsHelpers.directoryExists('./ts');
```

#### TsBuildCli

CLI command handler. Used internally by the CLI.

```typescript
import { TsBuildCli, runCli } from '@git.zone/tsbuild';

// Run the CLI
runCli();

// Or with custom working directory
const cli = new TsBuildCli('/path/to/project');
cli.run();
```

## ⚙️ Configuration

### tsconfig.json Support

tsbuild fully supports all compiler options from `tsconfig.json`. Your project configuration is respected and intelligently merged.

```json
{
  "compilerOptions": {
    "target": "ES2022",
    "module": "NodeNext",
    "moduleResolution": "NodeNext",
    "strict": true,
    "esModuleInterop": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "verbatimModuleSyntax": true
  }
}
```

### Configuration Priority (5 Levels) 📋

When multiple configuration sources exist, they merge in this order (later overrides earlier):

| Priority | Source | Description |
|----------|--------|-------------|
| 1️⃣ | **Default Options** | tsbuild's sensible defaults |
| 2️⃣ | **tsconfig.json** | All options from your tsconfig.json (if present) |
| 3️⃣ | **Protected Defaults** | Critical options for build integrity |
| 4️⃣ | **Programmatic Options** | Options passed to API functions |
| 5️⃣ | **CLI Flags** | Command-line arguments (highest priority) |

### Protected Options 🛡️

These options cannot be overridden by tsconfig.json alone (but can be overridden programmatically or via CLI):

| Option | Value | Reason |
|--------|-------|--------|
| `outDir` | `'dist_ts/'` | Required for automatic path transformations |
| `noEmitOnError` | `true` | Prevents broken builds from being emitted |
| `declaration` | `true` | Ensures `.d.ts` files for library consumers |
| `inlineSourceMap` | `true` | Consistent debugging experience |

### Default Compiler Options

When no tsconfig.json exists:

```typescript
{
  declaration: true,              // Generate .d.ts files
  emitDecoratorMetadata: true,    // Support DI frameworks
  experimentalDecorators: true,   // Enable decorators
  inlineSourceMap: true,          // Debug-friendly
  noEmitOnError: true,            // Fail-fast on errors
  outDir: 'dist_ts/',             // Output directory
  module: 'NodeNext',             // Modern Node.js modules
  target: 'ESNext',               // Latest JavaScript
  moduleResolution: 'NodeNext',
  noImplicitAny: false,           // Flexible for quick development
  esModuleInterop: true,          // CJS/ESM interop
  verbatimModuleSyntax: true      // Explicit imports/exports
}
```

### Path Transformation 🔄

tsbuild automatically transforms path mappings:

**tsconfig.json:**
```json
{
  "compilerOptions": {
    "paths": {
      "@models/*": ["./ts_models/*"]
    }
  }
}
```

**Automatic transformation:**
```
./ts_models/* → ./dist_ts_models/*
```

## ✨ Features

### Clean Builds 🧹

Output directories are automatically cleared before compilation:

```
Clearing output directory: ./dist_ts
Compiling 14 files from ./ts/**/*.ts
```

This ensures no stale files remain from previous builds.

### Monorepo Support with tspublish 📦

tsbuild is designed to work seamlessly with [@git.zone/tspublish](https://code.foss.global/git.zone/tspublish) for monorepo workflows. This enables building and publishing multiple packages from a single repository.

#### Directory Structure

```
my-project/
├── ts/                    # Main package source
├── ts_interfaces/         # Shared interfaces (order: 1)
├── ts_shared/             # Shared utilities (order: 2)
├── ts_core/               # Core logic (order: 3)
├── ts_web/                # Web-specific code (order: 4)
└── ts_node/               # Node-specific code (order: 5)
```

Each `ts_*` folder can contain its own `tspublish.json` to configure compilation and publishing behavior.

#### tspublish.json Configuration

Create a `tspublish.json` in each `ts_*` folder:

```json
{
  "name": "@myorg/core",
  "order": 3,
  "unpack": true,
  "dependencies": ["ts_interfaces", "ts_shared"]
}
```

| Option | Type | Default | Description |
|--------|------|---------|-------------|
| `name` | string | — | Package name for publishing |
| `order` | number | `Infinity` | Build sequence (lower builds first) |
| `unpack` | boolean | `true` | Flatten nested output directories |
| `dependencies` | string[] | — | Monorepo dependencies to bundle |

#### Build Order

The `tsfolders` command respects the `order` property:

```bash
npx tsbuild tsfolders
```

**Default ordering (without tspublish.json):**
1. `ts_interfaces` - always first (shared types)
2. `ts_shared` - always second (shared utilities)
3. Other folders sorted by `order` property
4. Folders without `order` are built last

**Example output:**
```
TypeScript Folder Compilation Plan (5 folders)
  1/5 ts_interfaces  (order: 1)
  2/5 ts_shared      (order: 2)
  3/5 ts_core        (order: 3)
  4/5 ts_web         (order: 4)
  5/5 ts_node        (order: 5)
```

### Auto-Unpack 📁

When TypeScript compiles files that import from sibling directories, it creates nested output:

```
dist_ts_core/
  ts_core/        ← nested output
  ts_shared/      ← pulled-in dependency
```

tsbuild automatically flattens this to:

```
dist_ts_core/
  index.js        ← flat, clean structure
```

This is especially important for monorepos where packages import from each other.

**Control via tspublish.json:**
```json
{
  "unpack": true
}
```

- `"unpack": true` (default) - Flatten nested directories after compilation
- `"unpack": false` - Keep original nested structure

**What gets unpacked:**
- The source folder's contents (`ts_core/`) are moved to the root of `dist_ts_core/`
- Sibling folders (`ts_shared/`) that were pulled in are removed (they have their own dist)

### Decorator Support 🎨

tsbuild supports both **TC39 standard decorators** (recommended) and legacy experimental decorators.

**TC39 Standard Decorators (Preferred)** 🌟

We strongly recommend using TC39 standard decorators for all new code. They are the official JavaScript standard and provide better semantics:

```typescript
// TC39 standard decorator
function log(target: any, context: ClassMethodDecoratorContext) {
  return function (...args: any[]) {
    console.log(`Calling ${String(context.name)}`);
    return target.apply(this, args);
  };
}

class UserService {
  @log
  getUser(id: string) {
    return { id, name: 'John' };
  }
}
```

**Legacy Decorators (Backwards Compatibility)**

For existing projects using frameworks like NestJS, TypeORM, or Angular that still require experimental decorators:

```typescript
@Injectable()
class UserService {
  constructor(
    @Inject('CONFIG') private config: Config,
    private logger: Logger
  ) {}
}
```

Enable legacy decorators in your `tsconfig.json`:
```json
{
  "compilerOptions": {
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true
  }
}
```

> 💡 **Tip:** When starting new projects or migrating existing ones, prefer TC39 decorators. They're the future of JavaScript and don't require experimental flags.

## 🔄 CI/CD Integration

### GitHub Actions

```yaml
name: Build
on: [push, pull_request]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: '20'

      - run: npm install
      - run: npx tsbuild
```

### JSON Output

```bash
npx tsbuild --json --quiet
```

```json
{
  "success": true,
  "totals": {
    "errors": 0,
    "filesWithErrors": 0,
    "tasks": 1
  },
  "errorsByFile": {}
}
```

### Package.json Scripts

```json
{
  "scripts": {
    "build": "tsbuild",
    "build:prod": "tsbuild --disallowimplicitany",
    "typecheck": "tsbuild check",
    "pretest": "tsbuild emitcheck 'test/**/*.ts'"
  }
}
```

## 🔧 Troubleshooting

### Common Issues

**"Cannot find module" errors in compiled output**

Make sure path mappings are configured in tsconfig.json. tsbuild automatically transforms them.

**Decorator errors**

Ensure your tsconfig.json has:
```json
{
  "compilerOptions": {
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true
  }
}
```

**Slow compilation**

Use `--skiplibcheck` to skip declaration file checking:
```bash
npx tsbuild --skiplibcheck
```

Only use this if you trust your dependencies' type definitions.

## License and Legal Information

This repository contains open-source code licensed under the MIT License. A copy of the license can be found in the [LICENSE](./LICENSE) file.

**Please note:** The MIT License does not grant permission to use the trade names, trademarks, service marks, or product names of the project, except as required for reasonable and customary use in describing the origin of the work and reproducing the content of the NOTICE file.

### Trademarks

This project is owned and maintained by Task Venture Capital GmbH. The names and logos associated with Task Venture Capital GmbH and any related products or services are trademarks of Task Venture Capital GmbH or third parties, and are not included within the scope of the MIT license granted herein.

Use of these trademarks must comply with Task Venture Capital GmbH's Trademark Guidelines or the guidelines of the respective third-party owners, and any usage must be approved in writing. Third-party trademarks used herein are the property of their respective owners and used only in a descriptive manner, e.g. for an implementation of an API or similar.

### Company Information

Task Venture Capital GmbH
Registered at District Court Bremen HRB 35230 HB, Germany

For any legal inquiries or further information, please contact us via email at hello@task.vc.

By using this repository, you acknowledge that you have read this section, agree to comply with its terms, and understand that the licensing of the code does not imply endorsement by Task Venture Capital GmbH of any derivative works.