Devex: Remove Importmap plugin (#6899)

## Summary

See [this
page](https://www.notion.so/comfy-org/Remove-importmap-and-replace-with-better-solution-if-it-exists-2ab6d73d3650801d83afe006fa0d9929?source=copy_link).

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6899-Devex-Remove-Importmap-plugin-2b66d73d365081b28167c9ae70100092)
by [Unito](https://www.unito.io)

build/plugins/generateImportMapPlugin.ts

@@ -1,154 +0,0 @@
-import glob from 'fast-glob'
-import fs from 'fs-extra'
-import { dirname, join } from 'node:path'
-import { type HtmlTagDescriptor, type Plugin, normalizePath } from 'vite'
-
-interface ImportMapSource {
-  name: string
-  pattern: string | RegExp
-  entry: string
-  recursiveDependence?: boolean
-  override?: Record<string, Partial<ImportMapSource>>
-}
-
-const parseDeps = (root: string, pkg: string) => {
-  const pkgPath = join(root, 'node_modules', pkg, 'package.json')
-  if (fs.existsSync(pkgPath)) {
-    const content = fs.readFileSync(pkgPath, 'utf-8')
-    const pkg = JSON.parse(content)
-    return Object.keys(pkg.dependencies || {})
-  }
-  return []
-}
-
-/**
- * Vite plugin that generates an import map for vendor chunks.
- *
- * This plugin creates a browser-compatible import map that maps module specifiers
- * (like 'vue' or 'primevue') to their actual file locations in the build output.
- * This improves module loading in modern browsers and enables better caching.
- *
- * The plugin:
- * 1. Tracks vendor chunks during bundle generation
- * 2. Creates mappings between module names and their file paths
- * 3. Injects an import map script tag into the HTML head
- * 4. Configures manual chunk splitting for vendor libraries
- *
- * @param vendorLibraries - An array of vendor libraries to split into separate chunks
- * @returns {Plugin} A Vite plugin that generates and injects an import map
- */
-export function generateImportMapPlugin(
-  importMapSources: ImportMapSource[]
-): Plugin {
-  const importMapEntries: Record<string, string> = {}
-  const resolvedImportMapSources: Map<string, ImportMapSource> = new Map()
-  const assetDir = 'assets/lib'
-  let root: string
-
-  return {
-    name: 'generate-import-map-plugin',
-
-    // Configure manual chunks during the build process
-    configResolved(config) {
-      root = config.root
-
-      if (config.build) {
-        // Ensure rollupOptions exists
-        if (!config.build.rollupOptions) {
-          config.build.rollupOptions = {}
-        }
-
-        for (const source of importMapSources) {
-          resolvedImportMapSources.set(source.name, source)
-          if (source.recursiveDependence) {
-            const deps = parseDeps(root, source.name)
-
-            while (deps.length) {
-              const dep = deps.shift()!
-              const depSource = Object.assign({}, source, {
-                name: dep,
-                pattern: dep,
-                ...source.override?.[dep]
-              })
-              resolvedImportMapSources.set(depSource.name, depSource)
-
-              const _deps = parseDeps(root, depSource.name)
-              deps.unshift(..._deps)
-            }
-          }
-        }
-
-        const external: (string | RegExp)[] = []
-        for (const [, source] of resolvedImportMapSources) {
-          external.push(source.pattern)
-        }
-        config.build.rollupOptions.external = external
-      }
-    },
-
-    generateBundle(_options) {
-      for (const [, source] of resolvedImportMapSources) {
-        if (source.entry) {
-          const moduleFile = join(source.name, source.entry)
-          const sourceFile = join(root, 'node_modules', moduleFile)
-          const targetFile = join(root, 'dist', assetDir, moduleFile)
-
-          importMapEntries[source.name] =
-            './' + normalizePath(join(assetDir, moduleFile))
-
-          const targetDir = dirname(targetFile)
-          if (!fs.existsSync(targetDir)) {
-            fs.mkdirSync(targetDir, { recursive: true })
-          }
-          fs.copyFileSync(sourceFile, targetFile)
-        }
-
-        if (source.recursiveDependence) {
-          const files = glob.sync(['**/*.{js,mjs}'], {
-            cwd: join(root, 'node_modules', source.name)
-          })
-
-          for (const file of files) {
-            const moduleFile = join(source.name, file)
-            const sourceFile = join(root, 'node_modules', moduleFile)
-            const targetFile = join(root, 'dist', assetDir, moduleFile)
-
-            importMapEntries[normalizePath(join(source.name, dirname(file)))] =
-              './' + normalizePath(join(assetDir, moduleFile))
-
-            const targetDir = dirname(targetFile)
-            if (!fs.existsSync(targetDir)) {
-              fs.mkdirSync(targetDir, { recursive: true })
-            }
-            fs.copyFileSync(sourceFile, targetFile)
-          }
-        }
-      }
-    },
-
-    transformIndexHtml(html) {
-      if (Object.keys(importMapEntries).length === 0) {
-        console.warn(
-          '[ImportMap Plugin] No vendor chunks found to create import map.'
-        )
-        return html
-      }
-
-      const importMap = {
-        imports: importMapEntries
-      }
-
-      const importMapTag: HtmlTagDescriptor = {
-        tag: 'script',
-        attrs: { type: 'importmap' },
-        children: JSON.stringify(importMap, null, 2),
-        injectTo: 'head'
-      }
-
-      return {
-        html,
-        tags: [importMapTag]
-      }
-    }
-  }
-}