Loop over svn stat output deleting files

admin — Thu, 14 Jan 2010 14:43:17 +0000

I had the issue where my MacBook creates files prefixed with ._ while working on a Samba share. I’ve fixed this once before but it was so long ago, I’ve forgotten how!! Anyway, I had a stack of these files in a checked-out svn project and needed to delete them. Rather than do each one individually I put together this Bash command that loops over each line outputted by svn stat, cleans it up and then removes the file.

1	svn stat \| grep -F ._ \| sed 's/? //' \| while read line; do rm -f $line; done

The grep -F looks for a literal period (.) in each line. In this case it’s a period underscore (._) string but we still need the -F.
The sed ’s/? //’ looks for the “? ” prefix and strips it.
The while loop does the rm -f on each line.

Here’s another method using xargs instead of a while loop. Also, cut is trimming 9 chars (the file status flag and the whitespace) from the front of outputted line.

1	svn stat \| grep -F ._ \| cut -c9- \| xargs rm -f

Bash – Match exact string in directory listing

admin — Mon, 27 Apr 2009 16:38:44 +0000

Been doing some bash scripting of late, been meaning to for ages. Really enjoying it too!

Anyway, today I needed to match an exact string in a directory listing (ls). To check if a volume on my Mac Book was mounted, so I could backup to it. Or any other drive for that matter. I ended up using this code:

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#!/bin/bash

if [ "$1" ]; then

  # Look for an exact match of the first passed argument in /Volumes. 

  # The -x switch matches the string ($1) exactly. The -c switch counts the outputted lines.

  if [ $(ls /Volumes/ | grep -c -x "$1") == 1 ]; then

    # Do stuff...

  else

    echo 'Sorry, but no volume with that name not found.'

  fi

else

  echo 'Please pass a destination volume to this backup script as the first command line argument.'

fi

# Usage

bash$ backup.sh "Volume name"

Web Development & Stuff » Bash scripting

Loop over svn stat output deleting files

Bash – Match exact string in directory listing