-#!/usr/bin/env python
+#!/usr/bin/env python3
+# Some systems don't have `python3` in their PATH. This isn't supported by x.py directly;
+# they should use `x` or `x.ps1` instead.
# This file is only a "symlink" to bootstrap.py, all logic should go there.
import sys
# If this is python2, check if python3 is available and re-execute with that
-# interpreter.
+# interpreter. Only python3 allows downloading CI LLVM.
+#
+# This matters if someone's system `python` is python2.
if sys.version_info.major < 3:
try:
- # On Windows, `py -3` sometimes works.
- # Try this first, because 'python3' sometimes tries to launch the app
- # store on Windows
os.execvp("py", ["py", "-3"] + sys.argv)
except OSError:
try: