Re: [gentoo-user] bash wizardry needed: PATH and MANPATH grow and grow and grow

["Kevin O'Gorman" <kogorman@gmail.com>]

[-- Attachment #1: Type: text/plain, Size: 1597 bytes --]

On 5/23/06, znx <znxster@gmail.com> wrote:
>
> On 21/05/06, Kevin O'Gorman <kogorman@gmail.com> wrote:
> >  Does anyone know a nice little idiom for de-duping a colon-list like
> PATH
> > or MANPATH?
>
> Yeah this is something that constantly annoyed me, I forget where I
> found this (although I moved it to a function), it is not of my
> creation.
>
> To ensure no confusion with the below paste, I have additionally
> placed this in a text file:
> http://kutzooi.co.uk/cleanpath.sh.txt
>
> function cleanpath {
>                 # Removes duplicates from PATH style variables
>         local variable='PATH'
>         if [ $# -eq 1 ]
>         then
>                 variable="$1"
>         fi
>         local var="${1:-${variable}}" oldpath newpath=: entry
>         oldpath="${!var}:"
>         while [ -n "$oldpath" ]; do
>                 entry="${oldpath%%:*}"
>                 oldpath="${oldpath#*:}"
>                 [ "${entry:0:1}" = / ] && [ -n "${newpath##*:$entry:*}" ]
> && \
>                         [ -d "$entry" ] && newpath="$newpath$entry:"
>         done
>         newpath="${newpath#:}"
>         eval "$var"'="${newpath%:}"'
> }
>
> cleanpath                                       # defaults to PATH
> cleanpath MANPATH
> cleanpath LD_LIBRARY_PATH
>
> Hope this helps.
> Mark
>
> --
> gentoo-user@gentoo.org mailing list
>
> This _does_ help.  It's mysterious enough that I tested it, and it seems
to work
except that it removes "." from any path.  This is not quite what I want.

++ kevin


-- 
Kevin O'Gorman, PhD

[-- Attachment #2: Type: text/html, Size: 3346 bytes --]