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CHRUBY_VERSION="0.3.9"
RUBIES=()
for dir in "$PREFIX/opt/rubies" "$HOME/.rubies"; do
[[ -d "$dir" && -n "$(ls -A "$dir")" ]] && RUBIES+=("$dir"/*)
done
unset dir
function chruby_reset()
{
[[ -z "$RUBY_ROOT" ]] && return
PATH=":$PATH:"; PATH="${PATH//:$RUBY_ROOT\/bin:/:}"
[[ -n "$GEM_ROOT" ]] && PATH="${PATH//:$GEM_ROOT\/bin:/:}"
if (( UID != 0 )); then
[[ -n "$GEM_HOME" ]] && PATH="${PATH//:$GEM_HOME\/bin:/:}"
GEM_PATH=":$GEM_PATH:"
[[ -n "$GEM_HOME" ]] && GEM_PATH="${GEM_PATH//:$GEM_HOME:/:}"
[[ -n "$GEM_ROOT" ]] && GEM_PATH="${GEM_PATH//:$GEM_ROOT:/:}"
GEM_PATH="${GEM_PATH#:}"; GEM_PATH="${GEM_PATH%:}"
unset GEM_HOME
[[ -z "$GEM_PATH" ]] && unset GEM_PATH
fi
PATH="${PATH#:}"; PATH="${PATH%:}"
unset RUBY_ROOT RUBY_ENGINE RUBY_VERSION RUBYOPT GEM_ROOT
hash -r
}
function chruby_use()
{
if [[ ! -x "$1/bin/ruby" ]]; then
echo "chruby: $1/bin/ruby not executable" >&2
return 1
fi
[[ -n "$RUBY_ROOT" ]] && chruby_reset
export RUBY_ROOT="$1"
export RUBYOPT="$2"
export PATH="$RUBY_ROOT/bin:$PATH"
eval "$(RUBYGEMS_GEMDEPS="" "$RUBY_ROOT/bin/ruby" - <<EOF
puts "export RUBY_ENGINE=#{Object.const_defined?(:RUBY_ENGINE) ? RUBY_ENGINE : 'ruby'};"
puts "export RUBY_VERSION=#{RUBY_VERSION};"
begin; require 'rubygems'; puts "export GEM_ROOT=#{Gem.default_dir.inspect};"; rescue LoadError; end
EOF
)"
export PATH="${GEM_ROOT:+$GEM_ROOT/bin:}$PATH"
if (( UID != 0 )); then
export GEM_HOME="$HOME/.gem/$RUBY_ENGINE/$RUBY_VERSION"
export GEM_PATH="$GEM_HOME${GEM_ROOT:+:$GEM_ROOT}${GEM_PATH:+:$GEM_PATH}"
export PATH="$GEM_HOME/bin:$PATH"
fi
hash -r
}
function chruby()
{
case "$1" in
-h|--help)
echo "usage: chruby [RUBY|VERSION|system] [RUBYOPT...]"
;;
-V|--version)
echo "chruby: $CHRUBY_VERSION"
;;
"")
local dir ruby
for dir in "${RUBIES[@]}"; do
dir="${dir%%/}"; ruby="${dir##*/}"
if [[ "$dir" == "$RUBY_ROOT" ]]; then
echo " * ${ruby} ${RUBYOPT}"
else
echo " ${ruby}"
fi
done
;;
system) chruby_reset ;;
*)
local dir ruby match
for dir in "${RUBIES[@]}"; do
dir="${dir%%/}"; ruby="${dir##*/}"
case "$ruby" in
"$1") match="$dir" && break ;;
*"$1"*) match="$dir" ;;
esac
done
if [[ -z "$match" ]]; then
echo "chruby: unknown Ruby: $1" >&2
return 1
fi
shift
chruby_use "$match" "$*"
;;
esac
}