[英]Avoid escaping dollar sign in a subcommand?
我需要處理一個文件並立即將其上傳到某處。 考慮這個例子,想象我們正在做aws s3 cp - s3://some-path/$FILE
而不是dd
調用:
from plumbum.cmd import split, seq, rev, dd
my_filter = (rev | dd['of=$FILE'])
cmd = seq['1', '10'] | split['--filter', str(my_filter)]
鑒於 $FILE 不是直接傳遞而是轉義的,因此split
中的子命令會創建一個名為$FILE
的文件。 我怎樣才能讓它不逃避美元表達式,而是逐字逐句?
作為一個臨時解決方案,我決定對plumbum
的shquote
進行猴子補丁:
from plumbum.cmd import split, seq, rev, dd
import plumbum
import unittest.mock as mock
# HACK: disable quoting of every argument in shquote
# otherwise we'd get --filter="dd 'of=$FILE'"
# which would create a file named $FILE anyway
with mock.patch('plumbum.commands.base.shquote', lambda x: x):
my_filter = str(rev | dd['of=$FILE'])
funnychars_new = plumbum.commands.base._funnychars.replace('$', '')
# HACK: don't treat dollar sign as an escapeable character
with mock.patch('plumbum.commands.base._funnychars', funnychars_new):
cmd = seq['1', '10'] | split['--filter', my_filter]
print(cmd)
cmd & plumbum.FG
把它放在命令執行之前為我解決了這個問題,但我歡迎另一個解決方案。
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