Add installation of certifi to Python. On old macOS versions (macOS Monterey 12.7.6, macOS Ventura 13.7.8), needed Python certificates aren't available otherwise, and emsdk.py will be unable to perform any HTTP downloads via python.
diff --git a/scripts/update_python.py b/scripts/update_python.py
index 98273f1..5ba0ee4 100755
--- a/scripts/update_python.py
+++ b/scripts/update_python.py
@@ -39,6 +39,7 @@
# when a version of Python needs to be redownloaded.
revision = '0'
+CERTIFI = 'certifi==2025.10.5'
PSUTIL = 'psutil==7.0.0'
upload_base = 'gs://webassembly/emscripten-releases-builds/deps/'
@@ -75,6 +76,7 @@
python_exe = os.path.join(src_dir, 'python.exe')
check_call([python_exe, '-m', 'ensurepip', '--upgrade'])
check_call([python_exe, '-m', 'pip', 'install', 'pywin32==310', '--no-warn-script-location'])
+ check_call([python_exe, '-m', 'pip', 'install', CERTIFI])
check_call([python_exe, '-m', 'pip', 'install', PSUTIL])
check_call(zip_cmd() + [os.path.join('..', '..', out_filename), '.'], cwd=src_dir)
