Fix loading projects on Windows network drives (#996)

* Improve support on windows network shares

* Don’t use network share paths on Windows

Some bugs in enhanced-resolve prevent this from working currently

* Update changelog

packages/tailwindcss-language-server/src/project-locator.ts

@@ -3,7 +3,6 @@ import * as path from 'node:path'
 import * as fs from 'node:fs/promises'
 import glob from 'fast-glob'
 import picomatch from 'picomatch'
-import normalizePath from 'normalize-path'
 import type { Settings } from '@tailwindcss/language-service/src/util/state'
 import { CONFIG_GLOB, CSS_GLOB } from './lib/constants'
 import { readCssFile } from './util/css'
@@ -14,9 +13,8 @@ import { CacheMap } from './cache-map'
 import { getPackageRoot } from './util/get-package-root'
 import resolveFrom from './util/resolveFrom'
 import { type Feature, supportedFeatures } from '@tailwindcss/language-service/src/features'
-import { pathToFileURL } from 'node:url'
 import { resolveCssImports } from './resolve-css-imports'
-import { normalizeDriveLetter } from './utils'
+import { normalizeDriveLetter, normalizePath, pathToFileURL } from './utils'
 
 export interface ProjectConfig {
   /** The folder that contains the project */
@@ -244,8 +242,20 @@ export class ProjectLocator {
       concurrency: Math.max(os.cpus().length, 1),
     })
 
-    // Resolve symlinks for all found files
-    files = await Promise.all(files.map(async (file) => normalizePath(await fs.realpath(file))))
+    files = await Promise.all(
+      files.map(async (file) => {
+        // Resolve symlinks for all found files
+        let actualPath = await fs.realpath(file)
+
+        // Ignore network paths on Windows. Resolving relative paths on a
+        // netshare throws in `enhanced-resolve` :/
+        if (actualPath.startsWith('\\') && process.platform === 'win32') {
+          return normalizePath(file)
+        }
+
+        return normalizePath(actualPath)
+      }),
+    )
 
     // Deduplicate the list of files and sort them for deterministic results
     // across environments

packages/tailwindcss-language-server/src/projects.ts

@@ -20,7 +20,6 @@ import { FileChangeType } from 'vscode-languageserver/node'
 import type { TextDocument } from 'vscode-languageserver-textdocument'
 import { URI } from 'vscode-uri'
 import { showError, SilentError } from './util/error'
-import normalizePath from 'normalize-path'
 import * as path from 'path'
 import * as fs from 'fs'
 import findUp from 'find-up'
@@ -70,14 +69,15 @@ import {
   clearRequireCache,
   withFallback,
   isObject,
+  pathToFileURL,
   changeAffectsFile,
+  normalizePath,
 } from './utils'
 import type { DocumentService } from './documents'
 import type { ProjectConfig } from './project-locator'
 import { supportedFeatures } from '@tailwindcss/language-service/src/features'
 import { loadDesignSystem } from './util/v4'
 import { readCssFile } from './util/css'
-import { pathToFileURL } from 'url'
 
 const colorNames = Object.keys(namedColors)
 

packages/tailwindcss-language-server/src/util/getModuleDependencies.ts

@@ -1,7 +1,7 @@
 // https://github.com/tailwindlabs/tailwindcss/blob/bac5ecf0040aa9a788d1b22d706506146ee831ff/src/lib/getModuleDependencies.js
 import fs from 'fs'
 import path from 'path'
-import normalizePath from 'normalize-path'
+import { normalizePath } from '../utils'
 
 let jsExtensions = ['.js', '.cjs', '.mjs']
 

packages/tailwindcss-language-server/src/util/resolveFrom.ts

@@ -1,4 +1,5 @@
 import { equal } from '@tailwindcss/language-service/src/util/array'
+import * as path from 'node:path'
 import { createResolver } from './resolve'
 
 let pnpApi: any
@@ -16,8 +17,17 @@ export function setPnpApi(newPnpApi: any): void {
 }
 
 export default function resolveFrom(from?: string, id?: string): string {
+  // Network share path on Windows
   if (id.startsWith('\\\\')) return id
 
+  // Normalized network share path on Windows
+  if (id.startsWith('//') && path.sep === '\\') return id
+
+  // Normalized network share path on Windows
+  if (from.startsWith('//') && path.sep === '\\') {
+    from = '\\\\' + from.slice(2)
+  }
+
   let newExtensions = Object.keys(require.extensions)
   if (!equal(newExtensions, extensions)) {
     extensions = newExtensions

packages/tailwindcss-language-server/src/utils.ts

@@ -1,5 +1,8 @@
 import Module from 'node:module'
 import path from 'node:path'
+import { URI } from 'vscode-uri'
+import normalizePathBase from 'normalize-path'
+import { pathToFileURL as pathToFileURLBase } from 'node:url'
 
 export function withoutLogs<T>(getter: () => T): T {
   let fns = {
@@ -89,3 +92,34 @@ export function changeAffectsFile(change: string, files: string[]): boolean {
   }
   return false
 }
+
+export function normalizePath(originalPath: string) {
+  let normalized = normalizePathBase(originalPath)
+
+  // This is Windows network share but the normalize path had one of the leading
+  // slashes stripped so we need to add it back
+  if (
+    originalPath.startsWith('\\\\') &&
+    normalized.startsWith('/') &&
+    !normalized.startsWith('//')
+  ) {
+    return `/${normalized}`
+  }
+
+  return normalized
+}
+
+export function pathToFileURL(filepath: string) {
+  try {
+    return pathToFileURLBase(filepath)
+  } catch (err) {
+    if (process.platform !== 'win32') throw err
+
+    // If `pathToFileURL` failsed on windows it's probably because the path was
+    // a windows network share path and there were mixed slashes.
+    // Fix the path and try again.
+    filepath = URI.file(filepath).fsPath
+
+    return pathToFileURLBase(filepath)
+  }
+}

packages/vscode-tailwindcss/CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## Prerelease
 
-- Nothing yet!
+- Fix loading projects on Windows network drives ([#996](https://github.com/tailwindlabs/tailwindcss-intellisense/pull/996))
 
 ## 0.12.1