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on windows, rename is not atomic, so utilize exclusive access to the file

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Benjamin Peterson 2011-07-08 13:17:42 -05:00
parent 8c683acad1
commit 639f35bbc4
1 changed files with 10 additions and 5 deletions
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15
_pytest/assertion/rewrite.py
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@ -153,11 +153,16 @@ def _make_rewritten_pyc(state, fn, pyc):
# assertion rewriting, but I don't know of a fast way to tell. # assertion rewriting, but I don't know of a fast way to tell.
state.trace("failed to compile: %r" % (fn,)) state.trace("failed to compile: %r" % (fn,))
return None return None
# Dump the code object into a file specific to this process. if sys.platform.startswith("win"):
proc_pyc = pyc + "." + str(os.getpid()) # Windows grants exclusive access to open files and doesn't have atomic
_write_pyc(co, fn, proc_pyc) # rename, so just write into the final file.
# Atomically replace the pyc. _write_pyc(co, fn, pyc)
os.rename(proc_pyc, pyc) else:
# When not on windows, assume rename is atomic. Dump the code object
# into a file specific to this process and atomically replace it.
proc_pyc = pyc + "." + str(os.getpid())
_write_pyc(co, fn, proc_pyc)
os.rename(proc_pyc, pyc)
return co return co
def _read_pyc(source, pyc): def _read_pyc(source, pyc):