Created
October 10, 2012 14:32
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pathmunge
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| # Pathmunge -- add a new path to a path variable | |
| # arg1 - name of path variable | |
| # arg2 - new path to add | |
| # arg3 - if present APPEND rather than PREPEND | |
| pathmunge () { | |
| local pathVar=$1 | |
| local pathVal=$(eval echo \$$pathVar) | |
| local newVal=$2 | |
| local after=$3 | |
| if [ -z "$pathVal" ]; then | |
| pathVal=$newVal | |
| elif ! echo $pathVal | /usr/bin/egrep -q "(^|:)$newVal($|:)" >/dev/null 2>&1 ; then | |
| if [ ! -z "$after" ] ; then | |
| pathVal=$pathVal:$newVal | |
| else | |
| pathVal=$newVal:$pathVal | |
| fi | |
| fi | |
| eval $pathVar=$pathVal | |
| } |
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