Sheetal Nandi (sheetalkamat) · Mar 7, 2019 · Mar 6, 2019 · Mar 6, 2019 · Wesley Wigham (weswigham) · Mar 7, 2019
diff --git a/src/compiler/resolutionCache.ts b/src/compiler/resolutionCache.ts
@@ -71,8 +71,8 @@ namespace ts {
         nonRecursive?: boolean;
     }
 
-    export function isPathInNodeModulesStartingWithDot(path: Path) {
-        return stringContains(path, "/node_modules/.");
+    export function isPathIgnored(path: Path) {
+        return some(ignoredPaths, searchPath => stringContains(path, searchPath));
     }
 
     export const maxNumberOfFilesToIterateForInvalidation = 256;
@@ -696,7 +696,7 @@ namespace ts {
             }
             else {
                 // If something to do with folder/file starting with "." in node_modules folder, skip it
-                if (isPathInNodeModulesStartingWithDot(fileOrDirectoryPath)) return false;
+                if (isPathIgnored(fileOrDirectoryPath)) return false;
 
                 // Some file or directory in the watching directory is created
                 // Return early if it does not have any of the watching extension or not the custom failed lookup path

diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
@@ -326,6 +326,9 @@ namespace ts {
                 : FileWatcherEventKind.Changed;
     }
 
+    /*@internal*/
+    export const ignoredPaths = ["/node_modules/.", "/.git"];
+
     /*@internal*/
     export interface RecursiveDirectoryWatcherHost {
         watchDirectory: HostWatchDirectory;
@@ -371,6 +374,8 @@ namespace ts {
             else {
                 directoryWatcher = {
                     watcher: host.watchDirectory(dirName, fileName => {
+                        if (isIgnoredPath(fileName)) return;
+
                         // Call the actual callback
                         callbackCache.forEach((callbacks, rootDirName) => {
                             if (rootDirName === dirPath || (startsWith(dirPath, rootDirName) && dirPath[rootDirName.length] === directorySeparator)) {
@@ -426,7 +431,7 @@ namespace ts {
                     const childFullName = getNormalizedAbsolutePath(child, parentDir);
                     // Filter our the symbolic link directories since those arent included in recursive watch
                     // which is same behaviour when recursive: true is passed to fs.watch
-                    return filePathComparer(childFullName, normalizePath(host.realpath(childFullName))) === Comparison.EqualTo ? childFullName : undefined;
+                    return !isIgnoredPath(childFullName) && filePathComparer(childFullName, normalizePath(host.realpath(childFullName))) === Comparison.EqualTo ? childFullName : undefined;
                 }) : emptyArray,
                 existingChildWatches,
                 (child, childWatcher) => filePathComparer(child, childWatcher.dirName),
@@ -452,6 +457,16 @@ namespace ts {
                 (newChildWatches || (newChildWatches = [])).push(childWatcher);
             }
         }
+
+        function isIgnoredPath(path: string) {
+            return some(ignoredPaths, searchPath => isInPath(path, searchPath));
+        }
+
+        function isInPath(path: string, searchPath: string) {
+            if (stringContains(path, searchPath)) return true;
+            if (host.useCaseSensitiveFileNames) return false;
+            return stringContains(toCanonicalFilePath(path), searchPath);
+        }
     }
 
     // TODO: GH#18217 Methods on System are often used as if they are certainly defined

diff --git a/src/compiler/watch.ts b/src/compiler/watch.ts
@@ -987,7 +987,7 @@ namespace ts {
                     }
                     nextSourceFileVersion(fileOrDirectoryPath);
 
-                    if (isPathInNodeModulesStartingWithDot(fileOrDirectoryPath)) return;
+                    if (isPathIgnored(fileOrDirectoryPath)) return;
 
                     // If the the added or created file or directory is not supported file name, ignore the file
                     // But when watched directory is added/removed, we need to reload the file list

diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
@@ -1002,7 +1002,7 @@ namespace ts.server {
                 fileOrDirectory => {
                     const fileOrDirectoryPath = this.toPath(fileOrDirectory);
                     project.getCachedDirectoryStructureHost().addOrDeleteFileOrDirectory(fileOrDirectory, fileOrDirectoryPath);
-                    if (isPathInNodeModulesStartingWithDot(fileOrDirectoryPath)) return;
+                    if (isPathIgnored(fileOrDirectoryPath)) return;
                     const configFilename = project.getConfigFilePath();
 
                     // If the the added or created file or directory is not supported file name, ignore the file
@@ -2071,7 +2071,7 @@ namespace ts.server {
                 watchDir,
                 (fileOrDirectory) => {
                     const fileOrDirectoryPath = this.toPath(fileOrDirectory);
-                    if (isPathInNodeModulesStartingWithDot(fileOrDirectoryPath)) return;
+                    if (isPathIgnored(fileOrDirectoryPath)) return;
 
                     // Has extension
                     Debug.assert(result.refCount > 0);

diff --git a/src/testRunner/unittests/tsserver/watchEnvironment.ts b/src/testRunner/unittests/tsserver/watchEnvironment.ts
@@ -132,4 +132,79 @@ namespace ts.projectSystem {
             verifyRootedDirectoryWatch("c:/users/username/");
         });
     });
+
+    it(`unittests:: tsserver:: watchEnvironment:: tsserverProjectSystem recursive watch directory implementation does not watch files/directories in node_modules starting with "."`, () => {
+        const projectFolder = "/a/username/project";
+        const projectSrcFolder = `${projectFolder}/src`;
+        const configFile: File = {
+            path: `${projectFolder}/tsconfig.json`,
+            content: "{}"
+        };
+        const index: File = {
+            path: `${projectSrcFolder}/index.ts`,
+            content: `import {} from "file"`
+        };
+        const file1: File = {
+            path: `${projectSrcFolder}/file1.ts`,
+            content: ""
+        };
+        const nodeModulesExistingUnusedFile: File = {
+            path: `${projectFolder}/node_modules/someFile.d.ts`,
+            content: ""
+        };
+
+        const fileNames = [index, file1, configFile, libFile].map(file => file.path);
+        // All closed files(files other than index), project folder, project/src folder and project/node_modules/@types folder
+        const expectedWatchedFiles = arrayToMap(fileNames.slice(1), identity, () => 1);
+        const expectedWatchedDirectories = arrayToMap([projectFolder, projectSrcFolder, `${projectFolder}/${nodeModules}`, `${projectFolder}/${nodeModulesAtTypes}`], identity, () => 1);
+
+        const environmentVariables = createMap<string>();
+        environmentVariables.set("TSC_WATCHDIRECTORY", Tsc_WatchDirectory.NonRecursiveWatchDirectory);
+        const host = createServerHost([index, file1, configFile, libFile, nodeModulesExistingUnusedFile], { environmentVariables });
+        const projectService = createProjectService(host);
+        projectService.openClientFile(index.path);
+
+        const project = Debug.assertDefined(projectService.configuredProjects.get(configFile.path));
+        verifyProject();
+
+        const nodeModulesIgnoredFileFromIgnoreDirectory: File = {
+            path: `${projectFolder}/node_modules/.cache/someFile.d.ts`,
+            content: ""
+        };
+        host.ensureFileOrFolder(nodeModulesIgnoredFileFromIgnoreDirectory);
+        host.checkTimeoutQueueLength(0);
+        verifyProject();
+
+        const nodeModulesIgnoredFile: File = {
+            path: `${projectFolder}/node_modules/.cacheFile.ts`,
+            content: ""
+        };
+        host.ensureFileOrFolder(nodeModulesIgnoredFile);
+        host.checkTimeoutQueueLength(0);
+        verifyProject();
+
+        const gitIgnoredFileFromIgnoreDirectory: File = {
+            path: `${projectFolder}/.git/someFile.d.ts`,
+            content: ""
+        };
+        host.ensureFileOrFolder(gitIgnoredFileFromIgnoreDirectory);
+        host.checkTimeoutQueueLength(0);
+        verifyProject();
+
+        const gitIgnoredFile: File = {
+            path: `${projectFolder}/.gitCache.d.ts`,
+            content: ""
+        };
+        host.ensureFileOrFolder(gitIgnoredFile);
+        host.checkTimeoutQueueLength(0);
+        verifyProject();
+
+        function verifyProject() {
+            checkWatchedDirectories(host, emptyArray, /*recursive*/ true);
+            checkWatchedFilesDetailed(host, expectedWatchedFiles);
+            checkWatchedDirectoriesDetailed(host, expectedWatchedDirectories, /*recursive*/ false);
+            checkProjectActualFiles(project, fileNames);
+        }
+    });
+
 }