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Install chruby and ruby-build with git. I keep their repo at ~/.chrb, their installation inside ~/local and my rubies at ~/.chrb/rubies.
Copy this in your ~/.mkshrc file
# chruby + ruby-build
chrb() {
source ~/local/share/chruby/chruby.sh
unset RUBIES
RUBIES=$(ls -d ~/.chrb/rubies/* 2> /dev/null)
CHRUBY_SOURCE_DIR=~/.chrb/chruby/
RUBY_BUILD_SOURCE_DIR=~/.chrb/ruby-build
case "$1" in
-h|--help)
chruby -h
echo
ruby-build -h
;;
-v|--version)
chruby -v
echo
ruby-build 2>&1 | head -1
;;
-l|--list-definitions)
# Get the current names of rubies to get a more usefull output
# Installed ruby will be prefixed with "[*]", no installed ruby with "[ ]"
_INSTALLED_RUBIES="$(ls ~/.chrb/rubies | sed 's:$:\$:' | xargs | sed 's: :\\|:g')"
if [ -n "$_INSTALLED_RUBIES" ]; then
ruby-build --definitions | \
sed "s:\($_INSTALLED_RUBIES\):[*] \1:" | \
sed '/\[/!s/^/[ ] /g' | COLUMNS=100 column
else
ruby-build --definitions | sed 's/^/[ ] /' | COLUMNS=100 column
fi
;;
-i|--install-definition)
(
# Temporary directory to build ruby
export TMPDIR=/tmp/rubies
# Use the same directory to keep the source code
export RUBY_BUILD_CACHE_PATH=$TMPDIR
# For a CPU with 4 cores
export MAKE_OPTS="-j 5"
# Rubies will be installed inside ~/.chrb/rubies/
ruby-build -v $2 ~/.chrb/rubies/$2
)
;;
-u|--update-definitions)
(
# Updates ruby-build and chruby from git because ... YOLO
cd $RUBY_BUILD_SOURCE_DIR
echo "Updating " $(pwd)
git pull
# Delete all ruby-build definitions
rm -rf ~/local/share/ruby-build/*
PREFIX=~/local ./install.sh
cd $CHRUBY_SOURCE_DIR
echo "Updating " $(pwd)
git pull
PREFIX=~/local make install
)
;;
-d|--delete-definition)
(
# Actually i just move it to other place... not so YOLO
mkdir -p /tmp/rubies
mv ~/.rubies/$2 /tmp/rubies/$2
)
;;
-c|--changelog-definitions)
(
# To see what i've just updated
_NUMBER_OF_COMMITS=10
cd $RUBY_BUILD_SOURCE_DIR
echo "ruby-build: last $_NUMBER_OF_COMMITS commits:"
git log --oneline -$_NUMBER_OF_COMMITS --parents
echo
cd $CHRUBY_SOURCE_DIR
echo "chruby last $_NUMBER_OF_COMMITS commits:"
git log --oneline -$_NUMBER_OF_COMMITS --parents
)
;;
*)
if [ -z $@ ]; then
# If there is a .ruby-version file in the current working
# directory check if there is a ruby installed with *exactly* the
# same name. This will disable the "Fuzzy matching of Rubies by name."
# feature in chruby... that's the way, aha, i like it.
_CWD=$(pwd)
_RUBY_VERSION_FILE="$_CWD/.ruby-version"
_SELECTED_RUBY=""
if [ -f "$_RUBY_VERSION_FILE" ]; then
echo "Detected $_RUBY_VERSION_FILE"
_RUBY_VERSION=$(head -1 "$_RUBY_VERSION_FILE" | cut -d ' ' -f 1)
for ruby in $(ls ~/.chrb/rubies); do
if [ "$_RUBY_VERSION" == "$ruby" ]; then
echo "Recognized $ruby"
_SELECTED_RUBY="$ruby";
break
fi
done
if [ -z "$_SELECTED_RUBY" ]; then
echo "$_RUBY_VERSION is not installed at ~/.chrb/rubies"
echo "Installed rubies:"
fi
fi
chruby $_SELECTED_RUBY
else
chruby $@
fi
;;
esac
}
