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