[Python-Dev] subprocess shell=True on Windows doesn't escape ^ character (original) (raw)
Ryan Gonzalez rymg19 at gmail.com
Fri Jun 13 01:55:08 CEST 2014
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SHELLS ARE NOT CROSS-PLATFORM!!!! Seriously, there are going to be differences. If you really must:
escape = lambda s: s.replace('^', '^^') if os.name == 'nt' else s
Viola.
On Wed, Jun 11, 2014 at 5:53 PM, anatoly techtonik <techtonik at gmail.com> wrote:
On Thu, Jun 12, 2014 at 1:30 AM, Chris Angelico <rosuav at gmail.com> wrote:
On Thu, Jun 12, 2014 at 7:58 AM, Ryan <rymg19 at gmail.com> wrote: > In all seriousness, to me this is obvious. When you pass a command to the > shell, naturally, certain details are shell-specific.
On Windows cmd.exe is used by default: http://hg.python.org/cpython/file/38a325c84564/Lib/subprocess.py#l1108 so it makes sense to make default behavior cross-platform. > -10000. Bad idea. Very bad idea. If you want the ^ to be escaped, do it > yourself. Or better yet, don't pass shell=True. Definitely the latter. Why pass shell=True when executing a single command? I don't get it. This is a complete use case using Rietveld upload script: http://techtonik.rainforce.org/2013/07/code-review-with-rietveld-and-mercurial.html I am interested to know how to modify upload script without kludges: https://code.google.com/p/rietveld/source/browse/upload.py#1056 I expect many people are facing with the same problem trying to wrap Git and HG with Python scripts. -- anatoly t.
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