chore: 🤖 optimize build script (#1788)

* chore: 🤖 optimize build script

* chore: 🤖 remove unused start scripts

* fix: 🐛 build script

* chore: fix

* [autofix.ci] apply automated fixes

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

Author: Saul-Mirone

Diff for: .changeset/config.json

@@ -7,7 +7,7 @@
   "access": "public",
   "baseBranch": "main",
   "updateInternalDependencies": "patch",
-  "ignore": ["@milkdown/e2e", "@milkdown/storybook"],
+  "ignore": ["@milkdown/e2e", "@milkdown/storybook", "@milkdown/dev"],
   "___experimentalUnsafeOptions_WILL_CHANGE_IN_PATCH": {
     "onlyUpdatePeerDependentsWhenOutOfRange": true
   }

Diff for: dev/package.json

@@ -0,0 +1,36 @@
+{
+  "name": "@milkdown/dev",
+  "private": true,
+  "type": "module",
+  "exports": {
+    ".": {
+      "import": "./lib/index.js",
+      "types": "./lib/index.d.ts"
+    },
+    "./vite": {
+      "import": "./lib/vite.js",
+      "types": "./lib/vite.d.ts"
+    }
+  },
+  "scripts": {
+    "build": "rimraf './lib' && tsc"
+  },
+  "nx": {
+    "targets": {
+      "build": {
+        "outputs": [
+          "{projectRoot}/lib"
+        ],
+        "dependsOn": [
+          "build"
+        ]
+      },
+      "tsc": {
+        "outputs": [],
+        "dependsOn": [
+          "build"
+        ]
+      }
+    }
+  }
+}

Diff for: dev/src/index.ts

@@ -0,0 +1 @@
+export {}

Diff for: dev/src/vite.ts

@@ -0,0 +1,86 @@
+import { readFileSync } from 'node:fs'
+import { basename, dirname, resolve } from 'node:path'
+import { fileURLToPath } from 'node:url'
+import type { BuildOptions, UserConfig } from 'vite'
+import { defineConfig } from 'vite'
+
+import globalPackageJson from '../../package.json' with { type: 'json' }
+
+const external = [/@milkdown/]
+
+const libFileName = (format: string) => `index.${format}.js`
+
+function isObject(item: unknown): item is Record<string, unknown> {
+  return Boolean(item && typeof item === 'object' && !Array.isArray(item))
+}
+
+function mergeDeep<T>(target: T, ...sources: T[]): T {
+  if (!sources.length) return target
+  const source = sources.shift()
+
+  if (isObject(target) && isObject(source)) {
+    for (const key in source) {
+      if (isObject(source[key])) {
+        if (!target[key]) Object.assign(target, { [key]: {} })
+        mergeDeep(target[key] as T, source[key] as T)
+      } else {
+        Object.assign(target, { [key]: source[key] })
+      }
+    }
+  }
+
+  return mergeDeep(target, ...sources)
+}
+
+function viteBuild(path: string, options: BuildOptions = {}): BuildOptions {
+  const dir = dirname(fileURLToPath(path))
+  const packageDirName = basename(dir)
+
+  const packageJson = JSON.parse(
+    readFileSync(resolve(dir, 'package.json'), { encoding: 'utf-8' })
+  )
+  const deps = {
+    ...packageJson.dependencies,
+    ...packageJson.devDependencies,
+    ...packageJson.peerDependencies,
+    ...globalPackageJson.devDependencies,
+  }
+  return mergeDeep<BuildOptions>(
+    {
+      sourcemap: true,
+      emptyOutDir: false,
+      lib: {
+        entry: resolve(dir, 'src', 'index.ts'),
+        name: `milkdown_${packageDirName}`,
+        fileName: libFileName,
+        formats: ['es'],
+      },
+      rollupOptions: {
+        external: Array.from(new Set([...Object.keys(deps), ...external])),
+        output: {
+          dir: resolve(dir, 'lib'),
+        },
+      },
+      minify: false,
+      terserOptions: { compress: false, mangle: false },
+    },
+    options
+  )
+}
+
+/**
+ * Config for plugins
+ *
+ * @param packageDirName - package directory name
+ * @param options - custom options
+ * @returns user config
+ */
+export function pluginViteConfig(
+  packageDirName: string,
+  options: UserConfig = {}
+) {
+  return defineConfig({
+    ...options,
+    build: viteBuild(packageDirName, options.build),
+  })
+}

Diff for: dev/tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "extends": "../tsconfig.base.json",
+  "compilerOptions": {
+    "rootDir": "src",
+    "outDir": "lib"
+  },
+  "include": ["src"]
+}