Requires Ruby language.

Original PD nawk version by Greg Ercolano. Ruby port by Gonzalo Garramuno.

These aliases show how to make epath.rb easy to use in tcsh:

alias addpath 'setenv PATH `echo $PATH | epath.rb add !*`'
alias inspath 'setenv PATH `echo $PATH | epath.rb ins !*`'
alias delpath 'setenv PATH `echo $PATH | epath.rb rm !*`'

Example:

> addpath /usr/bin /bin

For modifying other environment variables, use:

alias addvar 'setenv !:1 `echo $!:1 | epath.rb add !:2*`'
alias insvar 'setenv !:1 `echo $!:1 | epath.rb ins !:2*`'
alias delvar 'setenv !:1 `echo $!:1 | epath.rb rm !:2*`'

Example:

> addvar LD_LIBRARY_PATH $MAYA_LOCATION/plugins

Duplicate paths are removed for optimization.

rm - removes all occurances of path
add - removes all prev occurances, append to end of PATH
ins - removes all prev occurances, insert at head of PATH
opt - just optimize (remove duplicate occurances)