1 files changed, 39 insertions, 0 deletions
diff --git a/js/run_node.py b/js/run_node.py
new file mode 100755
index 000000000..506f2be4c
--- /dev/null
+++ b/js/run_node.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+"""
+gn can only run python scripts. This launches a subprocess Node process.
+The working dir of this program is out/Debug/ (AKA root_build_dir)
+Before running node, we symlink js/node_modules to out/Debug/node_modules.
+"""
+import subprocess
+import sys
+import os
+
+
+def symlink(target, name, target_is_dir=False):
+    if os.name == "nt":
+        import ctypes
+        CreateSymbolicLinkW = ctypes.windll.kernel32.CreateSymbolicLinkW
+        CreateSymbolicLinkW.restype = ctypes.c_ubyte
+        CreateSymbolicLinkW.argtypes = (ctypes.c_wchar_p, ctypes.c_wchar_p,
+                                        ctypes.c_uint32)
+
+        flags = 0x02  # SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE
+        if (target_is_dir):
+            flags |= 0x01  # SYMBOLIC_LINK_FLAG_DIRECTORY
+        if not CreateSymbolicLinkW(name, target, flags):
+            raise ctypes.WinError()
+    else:
+        os.symlink(target, name)
+
+
+js_path = os.path.dirname(os.path.realpath(__file__))
+target_abs = os.path.join(js_path, "node_modules")
+target_rel = os.path.relpath(target_abs)
+
+if not os.path.exists("node_modules"):
+    if os.path.lexists("node_modules"):
+        os.unlink("node_modules")
+    symlink(target_rel, "node_modules", True)
+
+args = ["node"] + sys.argv[1:]
+sys.exit(subprocess.call(args))