blob: 4708d4c3b60246eb3110f8de39407c90da026616 [file] [log] [blame]
#!/usr/bin/env python
"""Calls `gn` with the right --dotfile= and --root= arguments for LLVM."""
# GN normally expects a file called '.gn' at the root of the repository.
# Since LLVM's GN build isn't supported, putting that file at the root
# is deemed inappropriate, which requires passing --dotfile= and -root= to GN.
# Since that gets old fast, this script automatically passes these arguments.
import os
import subprocess
import sys
THIS_DIR = os.path.dirname(__file__)
ROOT_DIR = os.path.join(THIS_DIR, '..', '..', '..')
def get_platform():
import platform
if sys.platform == 'darwin':
return 'mac-amd64' if platform.machine() != 'arm64' else 'mac-arm64'
if platform.machine() not in ('AMD64', 'x86_64'):
return None
if sys.platform.startswith('linux'):
return 'linux-amd64'
if sys.platform == 'win32':
return 'windows-amd64'
def print_no_gn(mention_get):
print('gn binary not found in PATH')
if mention_get:
print('run llvm/utils/gn/ to download a binary and try again, or')
return 1
def main():
# Find real gn executable.
gn = 'gn'
if'gn --version', stdout=open(os.devnull, 'w'),
shell=True) != 0:
# Not on path. See if downloaded a prebuilt binary and run that
# if it's there, or suggest to run if it isn't.
platform = get_platform()
if not platform:
return print_no_gn(mention_get=False)
gn = os.path.join(os.path.dirname(__file__), 'bin', platform, 'gn')
if not os.path.exists(gn + ('.exe' if sys.platform == 'win32' else '')):
return print_no_gn(mention_get=True)
# Compute --dotfile= and --root= args to add.
extra_args = []
gn_main_arg = next((x for x in sys.argv[1:] if not x.startswith('-')), None)
if gn_main_arg != 'help': # `gn help` gets confused by the switches.
cwd = os.getcwd()
dotfile = os.path.relpath(os.path.join(THIS_DIR, '.gn'), cwd)
root = os.path.relpath(ROOT_DIR, cwd)
extra_args = [ '--dotfile=' + dotfile, '--root=' + root ]
# Run GN command with --dotfile= and --root= added.
cmd = [gn] + extra_args + sys.argv[1:]
if __name__ == '__main__':