[grep] bug if `pwd` != `bzr root`

[Bernhard Voelker]

Hi,

`bzr grep` only works if the working directory is `bzr root `.

The names of all versioned files are passed to `| xargs -0 grep ...` 
using the relative path to
the current checkouts' root directory, but the working directory is not 
being changed.

Here is an example:

bzr init A
cd A
mkdir B
echo hello > a_file
echo hello > B/b_file
bzr ci -m 'initial creation'
Committing to: /tmp/A/
added B
added a_file
added B/b_file
Committed revision 1.
bzr grep ll            # works because PWD=`bzr root`
B/b_file:hello
a_file:hello
cd B
bzr grep ll           # oops!!!
grep: B: No such file or directory
grep: B/b_file: No such file or directory
grep: a_file: No such file or directory

Note for Win32 users:
the grep plugin also works on Win32 if xargs and grep from 
unxutils.sf.net are in %PATH%.
;-)

Have a nice day,
Berny