emsdk.py.patch

gistfile1.txt

diff --git a/emsdk.py b/emsdk.py
index 6d30c56..e2010bc 100644
--- a/emsdk.py
+++ b/emsdk.py
@@ -1241,12 +1241,12 @@ def find_latest_installed_tool(name):
 
 # npm install in Emscripten root directory
 def emscripten_npm_install(tool, directory):
-  node_tool = find_latest_installed_tool('node')
-  if not node_tool:
-    print('Failed to run "npm ci" in installed Emscripten root directory ' + tool.installation_path() + '! Please install node.js first!')
-    return False
+  #node_tool = find_latest_installed_tool('node')
+  #if not node_tool:
+  #  print('Failed to run "npm ci" in installed Emscripten root directory ' + tool.installation_path() + '! Please install node.js first!')
+  #  return False
 
-  node_path = os.path.join(node_tool.installation_path(), 'bin')
+  node_path = "" #os.path.join(node_tool.installation_path(), 'bin')
   npm = os.path.join(node_path, 'npm' + ('.cmd' if WINDOWS else ''))
   env = os.environ.copy()
   env["PATH"] = node_path + os.pathsep + env["PATH"]
@@ -1705,6 +1705,8 @@ class Tool(object):
     # installed for this tool to count as being installed.
     if hasattr(self, 'uses'):
       for tool_name in self.uses:
+        if tool_name == "node-12.18.1-64bit":
+          continue
         tool = find_tool(tool_name)
         if tool is None:
           print("Manifest error: No tool by name '" + tool_name + "' found! This may indicate an internal SDK error!")
@@ -1845,6 +1847,10 @@ class Tool(object):
     print("Installing SDK '" + str(self) + "'..")
 
     for tool_name in self.uses:
+      if tool_name == "node-12.18.1-64bit":
+        continue
+      if tool_name == "python-3.7.4-2-64bit":
+        continue
       tool = find_tool(tool_name)
       if tool is None:
         print("Manifest error: No tool by name '" + tool_name + "' found! This may indicate an internal SDK error!")

This is for running emsdk on an arm64 Mac. It just skips the install requirement of the node/python tools and the check for the node tool when running npm.

The assumption is that you've installed the arm64 version of both python3 and node via brew so Emscripten can just use the system installed versions.

./emsdk install sdk-upstream-master-64bit
./emsdk activate sdk-upstream-master-64bit