feat: support esm import

Author: yeonjuan

fixup.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+cat > build/cjs/package.json <<!EOF
+{
+  "version": "$(node -p 'require("./package.json").version')",
+  "type": "commonjs"
+}
+!EOF
+
+cat >build/mjs/package.json <<!EOF
+{
+  "version": "$(node -p 'require("./package.json").version')",
+  "type": "module"
+}
+!EOF

jest.config.js

@@ -3,4 +3,7 @@ module.exports = {
   preset: 'ts-jest',
   testEnvironment: 'node',
   testMatch: ['<rootDir>/**/*.test.ts'],
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
 };

package.json

@@ -2,19 +2,32 @@
   "name": "parse-git-diff",
   "version": "0.0.9",
   "description": "A parser for git diff",
-  "main": "build/index.umd.js",
-  "module": "build/index.module.js",
-  "types": "build/index.d.ts",
+  "main": "./build/cjs/index.js",
+  "module": "./build/mjs/index.js",
+  "types": "./build/types/index.d.ts",
   "scripts": {
     "prepublish": "yarn build",
-    "build": "rimraf build && rollup -c rollup.config.js && tsc --declaration",
+    "build": "rimraf build && tsc -p tsconfig.json && tsc -p tsconfig-esm.json",
+    "postbuild": "bash fixup.sh",
     "format": "prettier . --write",
     "test": "jest --coverage",
     "prebuild": "yarn check:all",
     "publish:demo": "gh-pages -d demo/build",
     "check:all": "prettier --check . && tsc --noEmit && yarn test",
     "build:readme": "node scripts/build-readme.js && yarn format"
   },
+  "exports": {
+    ".": {
+      "import": {
+        "types": "./build/mjs/index.d.ts",
+        "default": "./build/mjs/index.js"
+      },
+      "require": {
+        "types": "./build/cjs/index.d.ts",
+        "default": "./build/cjs/index.js"
+      }
+    }
+  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/yeonjuan/parse-git-diff.git"
@@ -34,18 +47,14 @@
     "jest": "^29.3.1",
     "md-replacer": "^0.0.4",
     "prettier": "^2.4.1",
-    "rimraf": "^4.0.5",
+    "rimraf": "^5.0.1",
     "rollup": "^2.58.0",
     "ts-jest": "^29.0.5",
     "tslib": "^2.3.1",
-    "typescript": "^4.4.3"
+    "typescript": "^5.0.4"
   },
   "files": [
-    "build",
-    "tsconfig.json",
-    "README.md",
-    "yarn.lock",
-    "package.json"
+    "build"
   ],
   "keywords": [
     "git",

rollup.config.js

@@ -6,8 +6,7 @@ export default {
   output: [
     {
       file: pkgJSON.main,
-      format: 'umd',
-      name: 'parseGitDiff',
+      format: 'cjs',
     },
     {
       file: pkgJSON.module,

src/index.ts

@@ -1,4 +1,4 @@
-import parseGitDiff from './parse-git-diff';
+import parseGitDiff from './parse-git-diff.js';
 export default parseGitDiff;
 
 export type {
@@ -17,4 +17,4 @@ export type {
   RenamedFile,
   AnyFileChange,
   GitDiff,
-} from './types';
+} from './types.js';

src/parse-git-diff.ts

@@ -1,4 +1,4 @@
-import Context from './context';
+import Context from './context.js';
 import type {
   GitDiff,
   AnyFileChange,
@@ -7,13 +7,13 @@ import type {
   ChunkRange,
   CombinedChunk,
   AnyChunk,
-} from './types';
+} from './types.js';
 import {
   ExtendedHeader,
   ExtendedHeaderValues,
   FileType,
   LineType,
-} from './constants';
+} from './constants.js';
 
 export default function parseGitDiff(diff: string): GitDiff {
   const ctx = new Context(diff);

src/types.ts

@@ -1,4 +1,4 @@
-import { LineType, FileType } from './constants';
+import { LineType, FileType } from './constants.js';
 
 export interface Base<Type extends string> {
   readonly type: Type;

tsconfig-base.json

@@ -0,0 +1,25 @@
+{
+  "exclude": [
+    "src/__tests__",
+    "src/__fixtures__",
+    "build",
+    "node_modules",
+    "demo"
+  ],
+  "include": ["src/**/*.ts"],
+  "compilerOptions": {
+    "allowSyntheticDefaultImports": true,
+    "declaration": true,
+    "declarationMap": true,
+    "inlineSources": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "isolatedModules": true,
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "sourceMap": true,
+    "strict": true,
+    "skipLibCheck": true,
+    "target": "es2022"
+  }
+}

tsconfig-esm.json

@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "module": "esnext",
+    "outDir": "build/mjs"
+  }
+}

tsconfig.json

@@ -1,15 +1,8 @@
 {
+  "extends": "./tsconfig-base.json",
   "compilerOptions": {
-    "target": "ES2017",
-    "module": "ES2015",
-    "strict": true,
-    "noImplicitAny": true,
-    "esModuleInterop": true,
-    "forceConsistentCasingInFileNames": true,
-    "declaration": true,
-    "outDir": "build",
-    "rootDir": "src",
-    "moduleResolution": "node"
-  },
-  "exclude": ["src/**/*.test.ts", "build", "node_modules", "demo"]
+    "module": "CommonJS",
+    "outDir": "build/cjs",
+    "moduleResolution": "Node"
+  }
 }