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improve xargs when running windows batch files

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Anthony Sottile 2020-11-06 13:09:01 -08:00
parent c972205214
commit 14f984fbcf
2 changed files with 19 additions and 0 deletions
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10
pre_commit/xargs.py
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@ -137,6 +137,16 @@ def xargs(
except parse_shebang.ExecutableNotFoundError as e:
return e.to_output()[:2]
# on windows, batch files have a separate length limit than windows itself
if (
sys.platform == 'win32' and
cmd[0].lower().endswith(('.bat', '.cmd'))
): # pragma: win32 cover
# this is implementation details but the command gets translated into
# full/path/to/cmd.exe /c *cmd
cmd_exe = parse_shebang.find_executable('cmd.exe')
_max_length = 8192 - len(cmd_exe) - len(' /c ')
partitions = partition(cmd, varargs, target_concurrency, _max_length)
def run_cmd_partition(