give xargs batch file execution additional headroom
@@ -145,7 +145,9 @@ def xargs(
# 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 ')
+ # 1024 is additionally subtracted to give headroom for further
+ # expansion inside the batch file
+ _max_length = 8192 - len(cmd_exe) - len(' /c ') - 1024
partitions = partition(cmd, varargs, target_concurrency, _max_length)
