Glob integration for the FS walker (denoland/deno_std#219)

Original: https://github.com/denoland/deno_std/commit/0c3ba838fa7e74a859d2a6dbfec3941a521c7988

1 files changed, 13 insertions, 2 deletions

diff --git a/fs/walk.ts b/fs/walk.ts
index 10393ae0b..f2a9b6c57 100644
--- a/fs/walk.ts
+++ b/fs/walk.ts
@@ -95,15 +95,26 @@ function include(f: FileInfo, options: WalkOptions): Boolean {
   if (options.exts && !options.exts.some(ext => f.path.endsWith(ext))) {
     return false;
   }
-  if (options.match && !options.match.some(pattern => pattern.test(f.path))) {
+  if (options.match && !patternTest(options.match, f.path)) {
     return false;
   }
-  if (options.skip && options.skip.some(pattern => pattern.test(f.path))) {
+  if (options.skip && patternTest(options.skip, f.path)) {
     return false;
   }
   return true;
 }
 
+function patternTest(patterns: RegExp[], path: string) {
+  // Forced to reset last index on regex while iterating for have
+  // consistent results.
+  // See: https://stackoverflow.com/a/1520853
+  return patterns.some(pattern => {
+    let r = pattern.test(path);
+    pattern.lastIndex = 0;
+    return r;
+  });
+}
+
 async function resolve(f: FileInfo): Promise<FileInfo> {
   // This is the full path, unfortunately if we were to make it relative
   // it could resolve to a symlink and cause an infinite loop.