From 20fa012b570635d81e8cd52f6f8e47cedb8ecc03 Mon Sep 17 00:00:00 2001
From: John Alanbrook <john@pockle.world>
Date: Thu, 4 Dec 2025 14:19:02 -0600
Subject: [PATCH] add symlink capabilities to fd.c

---
 scripts/fd.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 59 insertions(+), 5 deletions(-)

diff --git a/scripts/fd.c b/scripts/fd.c
index 6f38c583..7e068fe2 100644
--- a/scripts/fd.c
+++ b/scripts/fd.c
@@ -205,11 +205,6 @@ JSC_SCALL(fd_mkdir,
         ret = JS_ThrowInternalError(js, "could not make directory %s: %s", str, strerror(errno));
 )
 
-JSC_SCALL(fd_unlink,
-    if (unlink(str) != 0)
-        ret = JS_ThrowInternalError(js, "could not remove file %s: %s", str, strerror(errno));
-)
-
 JSC_SCALL(fd_mv,
     if (argc < 2)
         ret = JS_ThrowTypeError(js, "fd.mv requires 2 arguments: old path and new path");
@@ -245,6 +240,29 @@ JSC_SCALL(fd_symlink,
     }
 )
 
+JSC_SCALL(fd_unlink,
+#ifdef _WIN32
+    // On Windows, try to remove read-only attribute first
+    DWORD attrs = GetFileAttributesA(str);
+    if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_READONLY)) {
+        SetFileAttributesA(str, attrs & ~FILE_ATTRIBUTE_READONLY);
+    }
+    if (!DeleteFileA(str)) {
+        DWORD err = GetLastError();
+        if (err == ERROR_ACCESS_DENIED) {
+            // Might be a directory, try RemoveDirectory
+            if (!RemoveDirectoryA(str))
+                ret = JS_ThrowInternalError(js, "could not remove %s: error %lu", str, GetLastError());
+        } else {
+            ret = JS_ThrowInternalError(js, "could not remove file %s: error %lu", str, err);
+        }
+    }
+#else
+    if (unlink(str) != 0)
+        ret = JS_ThrowInternalError(js, "could not remove file %s: %s", str, strerror(errno));
+#endif
+)
+
 // Helper function for recursive removal
 static int remove_recursive(const char *path) {
     struct stat st;
@@ -570,6 +588,40 @@ JSC_SCALL(fd_enumerate,
     ret = results;
 )
 
+JSC_CCALL(fd_realpath,
+    const char *path = JS_ToCString(js, argv[0]);
+    if (!path) return JS_EXCEPTION;
+    
+#ifdef _WIN32
+    char resolved[PATH_MAX];
+    DWORD len = GetFullPathNameA(path, PATH_MAX, resolved, NULL);
+    JS_FreeCString(js, path);
+    if (len == 0 || len >= PATH_MAX) {
+        return JS_ThrowInternalError(js, "realpath failed: %s", strerror(errno));
+    }
+    return JS_NewString(js, resolved);
+#else
+    char *resolved = realpath(path, NULL);
+    JS_FreeCString(js, path);
+    if (!resolved) {
+        return JS_ThrowInternalError(js, "realpath failed: %s", strerror(errno));
+    }
+    JSValue result = JS_NewString(js, resolved);
+    free(resolved);
+    return result;
+#endif
+)
+
+JSC_CCALL(fd_is_link,
+    const char *path = JS_ToCString(js, argv[0]);
+    if (!path) return JS_EXCEPTION;
+    
+    struct stat st;
+    if (lstat(path, &st) == 0 && S_ISLNK(st.st_mode))
+        return JS_NewBool(js, 1);
+    return JS_NewBool(js, 0);
+)
+
 static const JSCFunctionListEntry js_fd_funcs[] = {
     MIST_FUNC_DEF(fd, open, 2),
     MIST_FUNC_DEF(fd, write, 2),
@@ -590,8 +642,10 @@ static const JSCFunctionListEntry js_fd_funcs[] = {
     MIST_FUNC_DEF(fd, readdir, 1),
     MIST_FUNC_DEF(fd, is_file, 1),
     MIST_FUNC_DEF(fd, is_dir, 1),
+    MIST_FUNC_DEF(fd, is_link, 1),
     MIST_FUNC_DEF(fd, enumerate, 2),
     MIST_FUNC_DEF(fd, symlink, 2),
+    MIST_FUNC_DEF(fd, realpath, 1),
 };
 
 JSValue js_fd_use(JSContext *js) {