From 432116f76a7ffc0234bcde615566d4fc24671b4e Mon Sep 17 00:00:00 2001
From: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>
Date: Wed, 24 Jan 2024 21:50:59 -0800
Subject: [PATCH] [windows] Use fewer system calls to get the file type in the
 module resolver

---
 src/fs.zig      |  5 +----
 src/windows.zig | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/src/fs.zig b/src/fs.zig
index dab45f0df6..f0d99b31e5 100644
--- a/src/fs.zig
+++ b/src/fs.zig
@@ -1272,10 +1272,7 @@ pub const FileSystem = struct {
             const absolute_path_c: [:0]const u8 = outpath[0..entry_path.len :0];
 
             if (comptime bun.Environment.isWindows) {
-                var file = try std.fs.openFileAbsoluteZ(absolute_path_c, .{ .mode = .read_only });
-                defer file.close();
-                const metadata = try file.metadata();
-                cache.kind = switch (metadata.kind()) {
+                cache.kind = switch (bun.windows.getFileKindFastA(absolute_path_c)) {
                     .directory => .dir,
                     .sym_link => .file,
                     else => .file,
diff --git a/src/windows.zig b/src/windows.zig
index 38d5801c17..bab2f862b1 100644
--- a/src/windows.zig
+++ b/src/windows.zig
@@ -3016,3 +3016,29 @@ pub extern "kernel32" fn GetTempPath2W(
     nBufferLength: DWORD, // [in]
     lpBuffer: LPCWSTR, // [out]
 ) DWORD;
+
+pub fn getFileKindFastA(
+    utf8_path: []const u8,
+) ?std.fs.File.Kind {
+    var wbuf: bun.WPathBuffer = undefined;
+    const path = bun.strings.toWPath(&wbuf, utf8_path);
+    const attrs = kernel32.GetFileAttributesW(path.ptr);
+
+    if (attrs == INVALID_FILE_ATTRIBUTES) {
+        return null;
+    }
+
+    if ((attrs & FILE_ATTRIBUTE_DIRECTORY) != 0) {
+        return .dir;
+    }
+
+    if ((attrs & FILE_ATTRIBUTE_REPARSE_POINT) != 0) {
+        return .sym_link;
+    }
+
+    if ((attrs & FILE_ATTRIBUTE_DEVICE) != 0) {
+        return .char_device;
+    }
+
+    return .file;
+}