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switch-ruby
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#!/bin/bash | |
# | |
# switch-ruby - Simple Ruby switcher | |
# | |
# The MIT License (MIT) | |
# | |
# Copyright (c) 2014 Jun SAITO <jun.saito@u-cast.com> | |
# | |
# Permission is hereby granted, free of charge, to any person obtaining a copy | |
# of this software and associated documentation files (the "Software"), to deal | |
# in the Software without restriction, including without limitation the rights | |
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
# copies of the Software, and to permit persons to whom the Software is | |
# furnished to do so, subject to the following conditions: | |
# | |
# The above copyright notice and this permission notice shall be included in | |
# all copies or substantial portions of the Software. | |
# | |
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
# THE SOFTWARE. | |
# | |
RUBIES_HOME=$HOME/.rubies | |
CURRENT=$RUBIES_HOME/current | |
AVAILABLE_RUBIES=($(find $RUBIES_HOME -maxdepth 1 -type d | grep -v "^$RUBIES_HOME$")) | |
function show_rubies() { | |
current=$(readlink -f $CURRENT) | |
i=0 | |
for ruby in ${AVAILABLE_RUBIES[@]}; do | |
if [ $ruby == $current ]; then | |
echo "--> " \($i\) $ruby | |
else | |
echo " " \($i\) $ruby | |
fi | |
i=$((i+1)) | |
done | |
} | |
function switch_ruby() | |
{ | |
if [ -z $1 ]; then | |
usage | |
exit 1 | |
fi | |
len=${#AVAILABLE_RUBIES[*]} | |
if [ $1 -lt 0 -o $(expr $len - 1) -lt $1 ]; then | |
echo "Error: Invalid number." | |
exit 1 | |
fi | |
if [ -e $CURRENT ]; then | |
unlink $CURRENT | |
fi | |
ln -sv ${AVAILABLE_RUBIES[$1]} $CURRENT | |
} | |
function usage() | |
{ | |
cat <<EOF | |
Usage: $(basename $0) <command> | |
Available commands: | |
list List installed rubies. | |
switch <number> Switch ruby. | |
EOF | |
} | |
case $1 in | |
ls | list) show_rubies ;; | |
sw | switch) switch_ruby $2 ;; | |
*) usage ;; | |
esac |
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