| #!/usr/bin/env python3 |
| """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/get.py to download a binary and try again, or") |
| print("follow https://gn.googlesource.com/gn/#getting-started") |
| return 1 |
| |
| |
| def main(): |
| # Find real gn executable. |
| gn = "gn" |
| if ( |
| subprocess.call( |
| "gn --version", |
| stdout=open(os.devnull, "w"), |
| stderr=subprocess.STDOUT, |
| shell=True, |
| ) |
| != 0 |
| ): |
| # Not on path. See if get.py downloaded a prebuilt binary and run that |
| # if it's there, or suggest to run get.py 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:] |
| sys.exit(subprocess.call(cmd)) |
| |
| |
| if __name__ == "__main__": |
| main() |