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Re: Pending release of 1.5
From: |
Schleicher Ralph (LLI) |
Subject: |
Re: Pending release of 1.5 |
Date: |
Thu, 13 Feb 2003 15:06:17 +0100 |
Tim Van Holder wrote:
> I suppose doing something like
> shared_ext_sed=$(echo ${shared_ext} |sed -e 's/\([.\\^$]\)/\\\1/g')
> would be too naive? (Note: this seems to work only with $() and not
> with backticks - then I get literal '\1's in shared_ext_sed... Is
> extra escaping needed within '' when inside ``?)
> I'm also not sure if ^ and $ need escaping, as I think they only take
> on meaning if at the very start or end of a regex, and neither position
> is possible here.
>
> So if shared_ext is '.my.lib$' (with literal '$'), we'd probably want it
> transformed to '\.my\.lib\$' before feeding it to sed.
> Granted, in 99% of cases only a leading '.' will need the added '\', and
> a very limited number of projects will have library names that happen
> to have the shared extension as final part of the library name, so
> just doing what's in the original patch isn't _that_ bad. But then
> the docs should probably mention this as a pretty big caveat.
See my other message <address@hidden> for how I did
it.
I used the following small script for testing the quoting:
#! /bin/sh -x
SED=/bin/sed
shared_ext='.so'
lib='libalso.so.5'
cmds='tempext=`echo $shared_ext | $SED -e
'\''s,\([^()0-9A-Za-z{}]\),\\\\\1,g'\''`; templib=`echo $lib | $SED -e
"s/\${tempext}\..*/\${tempext}/"`; echo $templib'
eval "$cmds"
The command "sed -e 's,\([^()0-9A-Za-z{}]\),\\\1,g'" performs rock
solid regexp quoting for basic regular expressions. In libtool.m4
you must double the "[" and "]" due to M4 quoting. I'm also quite
confident that "\\\\\1" (5 times "\") in the replacement text is
correct but it also works with 6 "\".
--
Ralph
- Re: Pending release of 1.5, Robert Boehne, 2003/02/04
- Re: Pending release of 1.5, Robert Boehne, 2003/02/12
- Re: Pending release of 1.5, Robert Boehne, 2003/02/12
- Re: Pending release of 1.5, Schleicher Ralph (LLI), 2003/02/12
- RE: Pending release of 1.5, Boehne, Robert, 2003/02/12
- Re: Pending release of 1.5, Schleicher Ralph (LLI), 2003/02/13
- Re: Pending release of 1.5,
Schleicher Ralph (LLI) <=
- Re: Pending release of 1.5, Schleicher Ralph (LLI), 2003/02/13