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gn build: Use "git rev-parse --git-dir" to discover the path to the .git directory.

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This makes it compatible with worktrees.

Differential Revision: https://reviews.llvm.org/D56422

llvm-svn: 350897
This commit is contained in:
Peter Collingbourne 2019-01-10 21:57:07 +00:00
parent 0bf824134a
commit a112e209cc
1 changed files with 8 additions and 7 deletions
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15
utils/gn/build/write_vcsrevision.py
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@ -12,7 +12,6 @@ import sys
THIS_DIR = os.path.abspath(os.path.dirname(__file__))
LLVM_DIR = os.path.dirname(os.path.dirname(os.path.dirname(THIS_DIR)))
MONO_DIR = os.path.dirname(LLVM_DIR)
def which(program):
@ -36,21 +35,23 @@ def main():
if os.path.isdir(os.path.join(LLVM_DIR, '.svn')):
print('SVN support not implemented', file=sys.stderr)
return 1
if os.path.isdir(os.path.join(LLVM_DIR, '.git')):
if os.path.exists(os.path.join(LLVM_DIR, '.git')):
print('non-mono-repo git support not implemented', file=sys.stderr)
return 1
git_dir = os.path.join(MONO_DIR, '.git')
if not os.path.isdir(git_dir):
print('.git dir not found at "%s"' % git_dir, file=sys.stderr)
return 1
git, use_shell = which('git'), False
if not git:
git = which('git.exe')
if not git:
git = which('git.bat')
use_shell = True
git_dir = subprocess.check_output([git, 'rev-parse', '--git-dir'],
cwd=LLVM_DIR, shell=use_shell).strip()
if not os.path.isdir(git_dir):
print('.git dir not found at "%s"' % git_dir, file=sys.stderr)
return 1
rev = subprocess.check_output([git, 'rev-parse', '--short', 'HEAD'],
cwd=git_dir, shell=use_shell).decode().strip()
# FIXME: add pizzas such as the svn revision read off a git note?