Use paths relative to opened folder when searching for projects (#1013)

* Allow testing project selectors

* Refactor

* Use paths relative to workspace rather than real paths

* Use realpaths in CSS import graph

* Ignore symlinks of already-present files when searching for configs

* Unique watch patterns before adding them

* Tweak log

* Update changelog

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

@@ -40,6 +40,14 @@ function testFixture(fixture: string, details: any[]) {
 
         expect(actual).toEqual(expected)
       }
+
+      if (detail?.selectors) {
+        let expected = detail?.selectors.map((path) => path.replace('{URL}', fixturePath)).sort()
+
+        let actual = project.documentSelector.map((selector) => selector.pattern).sort()
+
+        expect(actual).toEqual(expected)
+      }
     }
 
     expect(projects).toHaveLength(details.length)
@@ -90,10 +98,35 @@ testFixture('v4/multi-config', [
 ])
 
 testFixture('v4/workspaces', [
-  { config: 'packages/admin/app.css' },
-  // { config: 'packages/shared/ui.css' }, // Should this be included?
-  // { config: 'packages/style-export/lib.css' }, // Should this be included?
-  { config: 'packages/web/app.css' },
+  {
+    config: 'packages/admin/app.css',
+    selectors: [
+      '{URL}/node_modules/tailwindcss/**',
+      '{URL}/node_modules/tailwindcss/index.css',
+      '{URL}/node_modules/tailwindcss/theme.css',
+      '{URL}/node_modules/tailwindcss/utilities.css',
+      '{URL}/packages/admin/**',
+      '{URL}/packages/admin/app.css',
+      '{URL}/packages/admin/package.json',
+    ],
+  },
+  {
+    config: 'packages/web/app.css',
+    selectors: [
+      '{URL}/node_modules/tailwindcss/**',
+      '{URL}/node_modules/tailwindcss/index.css',
+      '{URL}/node_modules/tailwindcss/theme.css',
+      '{URL}/node_modules/tailwindcss/utilities.css',
+      '{URL}/packages/style-export/**',
+      '{URL}/packages/style-export/lib.css',
+      '{URL}/packages/style-export/theme.css',
+      '{URL}/packages/style-main-field/**',
+      '{URL}/packages/style-main-field/lib.css',
+      '{URL}/packages/web/**',
+      '{URL}/packages/web/app.css',
+      '{URL}/packages/web/package.json',
+    ],
+  },
 ])
 
 testFixture('v4/auto-content', [

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

@@ -242,20 +242,31 @@ export class ProjectLocator {
       concurrency: Math.max(os.cpus().length, 1),
     })
 
-    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)
-        }
+    let realpaths = await Promise.all(files.map((file) => fs.realpath(file)))
 
-        return normalizePath(actualPath)
-      }),
-    )
+    // Remove files that are symlinked yet have an existing file in the list
+    files = files.filter((normalPath, idx) => {
+      let realPath = realpaths[idx]
+
+      if (normalPath === realPath) {
+        return true
+      }
+
+      // If the file is a symlink, aliased path, network share, etc…; AND
+      // the realpath is not already in the list of files, then we can add
+      // the file to the list of files
+      //
+      // For example, node_modules in a monorepo setup would be symlinked
+      // and list both unless you opened one of the directories directly
+      else if (!files.includes(realPath)) {
+        return true
+      }
+
+      return false
+    })
+
+    // Make sure Windows-style paths are normalized
+    files = files.map((file) => normalizePath(file))
 
     // Deduplicate the list of files and sort them for deterministic results
     // across environments
@@ -327,6 +338,9 @@ export class ProjectLocator {
     // Resolve imports in all the CSS files
     await Promise.all(imports.map((file) => file.resolveImports()))
 
+    // Resolve real paths for all the files in the CSS import graph
+    await Promise.all(imports.map((file) => file.resolveRealpaths()))
+
     // Create a graph of all the CSS files that might (indirectly) use Tailwind
     let graph = new Graph<FileEntry>()
 
@@ -335,24 +349,21 @@ export class ProjectLocator {
     let utilitiesPath: string | null = null
 
     for (let file of imports) {
-      graph.add(file.path, file)
-
-      for (let msg of file.deps) {
-        let importedPath: string = normalizePath(msg.file)
-
-        // Record that `file.path` imports `msg.file`
-        graph.add(importedPath, new FileEntry('css', importedPath))
+      graph.add(file.realpath, file)
 
-        graph.connect(file.path, importedPath)
+      // Record that `file.path` imports `msg.file`
+      for (let entry of file.deps) {
+        graph.add(entry.realpath, entry)
+        graph.connect(file.realpath, entry.realpath)
       }
 
       // Collect the index, theme, and utilities files for manual connection
-      if (file.path.includes('node_modules/tailwindcss/index.css')) {
-        indexPath = file.path
-      } else if (file.path.includes('node_modules/tailwindcss/theme.css')) {
-        themePath = file.path
-      } else if (file.path.includes('node_modules/tailwindcss/utilities.css')) {
-        utilitiesPath = file.path
+      if (file.realpath.includes('node_modules/tailwindcss/index.css')) {
+        indexPath = file.realpath
+      } else if (file.realpath.includes('node_modules/tailwindcss/theme.css')) {
+        themePath = file.realpath
+      } else if (file.realpath.includes('node_modules/tailwindcss/utilities.css')) {
+        utilitiesPath = file.realpath
       }
     }
 
@@ -383,7 +394,7 @@ export class ProjectLocator {
 
       // And add the config to all their descendants as we need to track updates
       // that might affect the config / project
-      for (let child of graph.descendants(root.path)) {
+      for (let child of graph.descendants(root.realpath)) {
         child.configs.push(config)
       }
     }
@@ -540,7 +551,8 @@ type ConfigEntry = {
 
 class FileEntry {
   content: string | null
-  deps: Message[] = []
+  deps: FileEntry[] = []
+  realpath: string | null
 
   constructor(
     public type: 'js' | 'css',
@@ -559,7 +571,10 @@ class FileEntry {
   async resolveImports() {
     try {
       let result = await resolveCssImports().process(this.content, { from: this.path })
-      this.deps = result.messages.filter((msg) => msg.type === 'dependency')
+      let deps = result.messages.filter((msg) => msg.type === 'dependency')
+
+      // Record entries for each of the dependencies
+      this.deps = deps.map((msg) => new FileEntry('css', normalizePath(msg.file)))
 
       // Replace the file content with the processed CSS
       this.content = result.css
@@ -568,6 +583,12 @@ class FileEntry {
     }
   }
 
+  async resolveRealpaths() {
+    this.realpath = normalizePath(await fs.realpath(this.path))
+
+    await Promise.all(this.deps.map((entry) => entry.resolveRealpaths()))
+  }
+
   /**
    * Look for `@config` directives in a CSS file and return the path to the config
    * file that it points to. This path is (possibly) relative to the CSS file so

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

@@ -634,9 +634,15 @@ export class TW {
   }
 
   private filterNewWatchPatterns(patterns: string[]) {
-    let newWatchPatterns = patterns.filter((pattern) => !this.watched.includes(pattern))
-    this.watched.push(...newWatchPatterns)
-    return newWatchPatterns
+    // Make sure the list of patterns is unique
+    patterns = Array.from(new Set(patterns))
+
+    // Filter out any patterns that are already being watched
+    patterns = patterns.filter((pattern) => !this.watched.includes(pattern))
+
+    this.watched.push(...patterns)
+
+    return patterns
   }
 
   private async addProject(
@@ -792,11 +798,6 @@ export class TW {
     // to normalize it so that we can compare it properly.
     fsPath = normalizeDriveLetter(fsPath)
 
-    console.debug('[GLOBAL] Matching project to document', {
-      fsPath,
-      normalPath,
-    })
-
     for (let project of this.projects.values()) {
       if (!project.projectConfig.configPath) {
         fallbackProject = fallbackProject ?? project
@@ -846,7 +847,16 @@ export class TW {
       }
     }
 
-    return matchedProject ?? fallbackProject
+    let project = matchedProject ?? fallbackProject
+
+    if (!project) {
+      console.debug('[GLOBAL] No matching project for document', {
+        fsPath,
+        normalPath,
+      })
+    }
+
+    return project
   }
 
   async onDocumentColor(params: DocumentColorParams): Promise<ColorInformation[]> {

packages/vscode-tailwindcss/CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## Prerelease
 
-- Nothing yet!
+- Use paths relative to opened folder when searching for projects ([#1013](https://github.com/tailwindlabs/tailwindcss-intellisense/pull/1013))
 
 ## 0.12.4