LornaJane

grep: unknown directories method

Friday, August 3. 2007

The title of the post is the error message I got when attempting to grep a directory containing a file whose name started with a hyphen ( – ).

What has happened is that grep interprets hypens as switches, as if the idea was to convey options to use. This gave me a problem as I realised the file shouldn’t have been placed there in the first place and subversion was unable to remove it.

The Double-Hyphen Trick



The resolution is to pass two hyphens to the command, I didn’t know this before but this means “enough of the options, here’s the list to operate on”, or words to that effect. I used them to remove the file in question


svn rm -- \-*

Hopefully I’ll remember to look here next time I see this error message … but maybe not. So long as I don’t find myself on Google again

Posted by LornaJane in tech at 15:50 | Comments (5) | Trackbacks (0)

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I think you’ll find this is a feature of the getopt library, and so is part of all your favourite Gnu tools.

#1 Geoff (Homepage) on 2007-08-04 11:43 (Reply)

Geoff: Pleased to see you are enhancing my blog posts to the level of encyclopaedia entries as usual :) Thanks for your comment.

#2 LornaJane (Homepage) on 2007-08-06 13:36 (Reply)

No doubt you’re regretting choosing to have a blog instead of a Wiki!

#3 Geoff (Homepage) on 2007-08-07 08:38 (Reply)

Geoff: Actually no. This is my blog and I’ll post what I like, I consider the code snippet to be an entirely useful and appropriate form of recording information and it suits me to use it.

#4 LornaJane (Homepage) on 2007-08-09 08:22 (Reply)

Thanks! I put in a trackback here: http://www.westwideweb.com/wp/2008/11/14/grep-unknown-directories-method/

This helped me out of a jam today, thanks again,
MXWest

#5 MXWest (Homepage) on 2008-11-14 17:51 (Reply)

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