@ebowwa/generate-package

Auto-generate package.json from code analysis and git state.

What it does

• Version: From git tags (v1.2.3 → 1.2.3)
• Dependencies: Parsed from source imports
• Scripts: Standard presets (bun, node, cli, mcp)
• Exports: Generated from source structure
• Metadata: Inferred from directory name, README, git

Installation

bun add -D @ebowwa/generate-package

Usage

CLI

# Generate for current directory
generate-package

# Generate for specific package
generate-package ./packages/src/my-package

# Generate for all packages in monorepo
generate-package --all

# Check if package.json is outdated
generate-package --check

# Dry run (don't write)
generate-package --dry

Programmatic

import { generatePackageJson, generateAndWrite } from "@ebowwa/generate-package";

// Generate without writing
const result = await generatePackageJson("./packages/src/foo");
console.log(result.packageJson.version); // "1.2.3"

// Generate and write
await generateAndWrite("./packages/src/foo");

Hooks

Pre-build

Runs before build to ensure package.json is current:

{
  "scripts": {
    "prebuild": "generate-package-hook pre-build"
  }
}

Pre-commit

Stages updated package.json before commit:

# .husky/pre-commit
generate-package-hook pre-commit

Options

| Option | Default | Description | |--------|---------|-------------| | --src-dir | src | Source directory | | --out-dir | dist | Output directory | | --preset | bun | Script presets (bun, node, cli, mcp) | | --scope | @ebowwa | Package scope | | --all | false | Generate for all packages | | --check | false | Exit 1 if outdated | | --dry | false | Don't write files |

How it works

┌─────────────────────────────────────────────────────────────┐
│                   GENERATE PACKAGE.JSON                      │
├─────────────────────────────────────────────────────────────┤
│  INPUTS (no config files needed)                            │
│  ├── src/**/*.ts     → Parse imports → dependencies         │
│  ├── tsconfig.json   → TypeScript settings                  │
│  ├── git tags        → Version (semver from tags)           │
│  └── directory name  → Package name (@ebowwa/<dir>)         │
├─────────────────────────────────────────────────────────────┤
│  OUTPUTS                                                     │
│  ├── name, version, description                             │
│  ├── dependencies (external)                                │
│  ├── devDependencies (types, build tools)                   │
│  ├── scripts (build, test, publish)                         │
│  ├── exports, main, module, types                           │
│  └── publishConfig, repository, author                      │
└─────────────────────────────────────────────────────────────┘

Version Calculation

1. Exact tag match: Tag v1.2.3 → version 1.2.3
2. Commits since tag: Tag v1.2.3 + 5 commits → 1.2.4-dev.5
3. No tags: Total commits → 0.0.0-dev.42

License

MIT