42 lines
1.3 KiB
Diff
42 lines
1.3 KiB
Diff
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diff --git a/Lib/py_compile.py b/Lib/py_compile.py
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index 978da73..3559eb9 100644
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--- a/Lib/py_compile.py
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+++ b/Lib/py_compile.py
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@@ -120,16 +120,27 @@ def compile(file, cfile=None, dfile=None, doraise=False):
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return
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if cfile is None:
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cfile = file + (__debug__ and 'c' or 'o')
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- with open(cfile, 'wb') as fc:
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- fc.write('\0\0\0\0')
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- if "DETERMINISTIC_BUILD" in os.environ:
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+ # Atomically write the pyc/pyo file. Issue #13146.
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+ # id() is used to generate a pseudo-random filename.
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+ path_tmp = '{}.{}'.format(cfile, id(cfile))
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+ try:
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+ with open(path_tmp, 'wb') as fc:
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fc.write('\0\0\0\0')
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- else:
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- wr_long(fc, timestamp)
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- marshal.dump(codeobject, fc)
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- fc.flush()
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- fc.seek(0, 0)
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- fc.write(MAGIC)
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+ if "DETERMINISTIC_BUILD" in os.environ:
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+ fc.write('\0\0\0\0')
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+ else:
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+ wr_long(fc, timestamp)
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+ marshal.dump(codeobject, fc)
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+ fc.flush()
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+ fc.seek(0, 0)
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+ fc.write(MAGIC)
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+ os.rename(path_tmp, cfile)
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+ except OSError:
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+ try:
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+ os.unlink(path_tmp)
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+ except OSError:
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+ pass
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+ raise
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def main(args=None):
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"""Compile several source files.
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