mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-26 18:06:05 +00:00
c49770c60f
There is no need to support Python 2.7 anymore, Python 3.3+ has `subprocess.DEVNULL`. This is good practice and also prevents file handles from staying open unnecessarily. Also remove a couple unused or unneeded `__future__` imports.
76 lines
2.4 KiB
Python
Executable File
76 lines
2.4 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Calls `gn` with the right --dotfile= and --root= arguments for LLVM."""
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# GN normally expects a file called '.gn' at the root of the repository.
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# Since LLVM's GN build isn't supported, putting that file at the root
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# is deemed inappropriate, which requires passing --dotfile= and -root= to GN.
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# Since that gets old fast, this script automatically passes these arguments.
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import os
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import subprocess
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import sys
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THIS_DIR = os.path.dirname(__file__)
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ROOT_DIR = os.path.join(THIS_DIR, "..", "..", "..")
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def get_platform():
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import platform
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if sys.platform == "darwin":
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return "mac-amd64" if platform.machine() != "arm64" else "mac-arm64"
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if platform.machine() not in ("AMD64", "x86_64"):
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return None
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if sys.platform.startswith("linux"):
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return "linux-amd64"
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if sys.platform == "win32":
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return "windows-amd64"
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def print_no_gn(mention_get):
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print("gn binary not found in PATH")
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if mention_get:
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print("run llvm/utils/gn/get.py to download a binary and try again, or")
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print("follow https://gn.googlesource.com/gn/#getting-started")
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return 1
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def main():
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# Find real gn executable.
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gn = "gn"
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if (
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subprocess.call(
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"gn --version",
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stdout=subprocess.DEVNULL,
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stderr=subprocess.STDOUT,
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shell=True,
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)
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!= 0
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):
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# Not on path. See if get.py downloaded a prebuilt binary and run that
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# if it's there, or suggest to run get.py if it isn't.
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platform = get_platform()
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if not platform:
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return print_no_gn(mention_get=False)
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gn = os.path.join(os.path.dirname(__file__), "bin", platform, "gn")
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if not os.path.exists(gn + (".exe" if sys.platform == "win32" else "")):
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return print_no_gn(mention_get=True)
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# Compute --dotfile= and --root= args to add.
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extra_args = []
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gn_main_arg = next((x for x in sys.argv[1:] if not x.startswith("-")), None)
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if gn_main_arg != "help": # `gn help` gets confused by the switches.
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cwd = os.getcwd()
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dotfile = os.path.relpath(os.path.join(THIS_DIR, ".gn"), cwd)
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root = os.path.relpath(ROOT_DIR, cwd)
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extra_args = ["--dotfile=" + dotfile, "--root=" + root]
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# Run GN command with --dotfile= and --root= added.
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cmd = [gn] + extra_args + sys.argv[1:]
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sys.exit(subprocess.call(cmd))
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if __name__ == "__main__":
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main()
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