prenv

#!/bin/zsh
#
# prenv: Print env information nicely.
#
# 2006-12: Ported from shell function in .utilities, Steven J. DeRose.
# 2007-11-06 sjd: Smarter alignment, and move a bit further over. [variable].
#
# To do:
#

if [[ "$1" = "-h" ]]; then
    echo "Usage: prenv [variable]"
    echo "   Display the 'printenv' information much more readably."
    echo "   Like printenv, if no [variable] is given it prints them all."
    echo "   2006-12-15 sjd."
    exit;
fi

# "Break env to multiple lines, lengthen short variable names, insert
# tabs so the values line up, and break lines at colons (for PATH, etc.)

# (insert tab as '%' then translate, so tabs don't get lost in editing)
IND="                                  "

printenv $* | \
sed -r -e 's/^([^=]{16,23})=/\1%=/' \
       -e 's/^([^=]{8,15})=/\1%%=/' \
       -e 's/^([^=]{1,7})=/\1%%%=/' \
       -e 's/=/   %= /' | \
tr '%' '\011' | \
sort | \
sed "-e s/:/:$IND/g" | \
tr ':' '\012' | \
more

exit