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Full Discussion: SED: Can't Repeat Search Character in SED Output
Top Forums UNIX for Dummies Questions & Answers SED: Can't Repeat Search Character in SED Output Post 302353552 by rhetoric101 on Tuesday 15th of September 2009 03:10:42 PM
Old 09-15-2009
The code you suggested worked very well! It replaces only the underscores betwen the tags, which is want I wanted.

Code:
sed '
s/\(<[^>]*>\)\([^>]*\)\(<[^>]*>\)/\1\n\2\3/g 
:loop
s/\n\([^<_]*\)_/\1_Q\n/g 
/\n[^<_]*_/b loop
s/\n//g' a

What I'd like to know is what are the key differences in your script that enables sed to reuse the underscore, whereas in mine, sed completely hangs if I try to use the "\1_Q" (but works if I just use "\1Q").

Any ideas?
Last edited by rhetoric101; 09-15-2009 at 04:12 PM.. Reason: Forgot closing parenthesis
 

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LEARN ABOUT LINUX

svnpath

SVNPATH(1)                                                                                                                              SVNPATH(1)

NAME

       svnpath - output svn url with support for tags and branches

SYNOPSIS

       svnpath

       svnpath tags

       svnpath branches

       svnpath trunk

DESCRIPTION

       svnpath is intended to be run in a Subversion working copy.

       In its simplest usage, svnpath with no parameters outputs the svn url for the repository associated with the working copy.

       If a parameter is given, svnpath attempts to instead output the url that would be used for the tags, branches, or trunk. This will only
       work if it's run in the top-level directory that is subject to tagging or branching.

       For example, if you want to tag what's checked into Subversion as version 1.0, you could use a command like this:

         svn cp $(svnpath) $(svnpath tags)/1.0

       That's much easier than using svn info to look up the repository url and manually modifying it to derive the url to use for the tag, and
       typing in something like this:

         svn cp svn+ssh://my.server.example/svn/project/trunk svn+ssh://my.server.example/svn/project/tags/1.0

       svnpath uses a simple heuristic to convert between the trunk, tags, and branches paths. It replaces the first occurrence of trunk, tags, or
       branches with the name of what you're looking for. This will work ok for most typical Subversion repository layouts.

       If you have an atypical layout and it does not work, you can add a ~/.svnpath file. This file is perl code, which can modify the path in
       $url.  For example, the author uses this file:

        #!/usr/bin/perl
        # svnpath personal override file

        # For d-i I sometimes work from a full d-i tree branch. Remove that from
        # the path to get regular tags or branches directories.
        $url=~s!d-i/(rc|beta)[0-9]+/!!;
        $url=~s!d-i/sarge/!!;
        1

LICENSE

       GPL version 2 or later

AUTHOR

       Joey Hess <joey@kitenet.net>

Debian Utilities                                                    2013-12-23                                                          SVNPATH(1)
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