Merge pull request #2164 from boneskull/boneskull/issue2151

fix(fs): glob will traverse node_modules if asked to

Author: Gerrit0

src/lib/utils/fs.ts

@@ -149,7 +149,11 @@ export function glob(
     // cache of fs.realpathSync results to avoid extra I/O
     const realpathCache: Map<string, string> = new Map();
     const { includeDirectories = false, followSymlinks = false } = options;
-
+    // if we _specifically asked_ for something in node_modules, fine, otherwise ignore it
+    // to avoid globs like '**/*.ts' finding all the .d.ts files in node_modules.
+    // however, if the pattern is something like `!**/node_modules/**`, this will also
+    // cause node_modules to be considered, though it will be discarded by minimatch.
+    const shouldIncludeNodeModules = pattern.includes("node_modules");
     let dir = dirs.shift();
 
     const handleFile = (path: string) => {
@@ -216,8 +220,10 @@ export function glob(
         })) {
             if (child.isFile()) {
                 handleFile(child.name);
-            } else if (child.isDirectory() && child.name !== "node_modules") {
-                handleDirectory(child.name);
+            } else if (child.isDirectory()) {
+                if (shouldIncludeNodeModules || child.name !== "node_modules") {
+                    handleDirectory(child.name);
+                }
             } else if (followSymlinks && child.isSymbolicLink()) {
                 handleSymlink(child.name);
             }

src/test/utils/fs.test.ts

@@ -97,6 +97,32 @@ describe("fs.ts", () => {
             });
         });
 
+        describe("when node_modules is present in the pattern", function () {
+            it("should traverse node_modules", function () {
+                fix.dir("node_modules").addFile("test.ts").path;
+                fix.write();
+                equal(
+                    glob(`${fix.cwd}/node_modules/test.ts`, fix.cwd).map((f) =>
+                        basename(f)
+                    ),
+                    ["test.ts"]
+                );
+            });
+        });
+
+        describe("when node_modules is not present in the pattern", function () {
+            it("should not traverse node_modules", function () {
+                fix.dir("node_modules").addFile("test.ts").path;
+                fix.write();
+                equal(
+                    glob(`${fix.cwd}/**/test.ts`, fix.cwd).map((f) =>
+                        basename(f)
+                    ),
+                    []
+                );
+            });
+        });
+
         it("should ignore anything that is not a file, symbolic link, or directory", function (done) {
             // Use unix socket for example, because that's easiest to create.
             // Skip on Windows because it doesn't support unix sockets