bundler-exec/bundler-exec.sh

#!/bin/bash

# Automatically run Ruby scripts with "bundle exec" (but only when appropriate).
# http://effectif.com/ruby/automating-bundle-exec
# Github: https://github.com/gma/bundler-exec

## Functions

rbenv-installed()
{
    which rbenv > /dev/null 2>&1
}

bundler-installed()
{
    if rbenv-installed; then
        rbenv which bundle > /dev/null 2>&1
    else
        which bundle > /dev/null 2>&1
    fi
}

within-bundled-project()
{
    local dir="$(pwd)"
    while [ "$(dirname $dir)" != "/" ]; do
        [ -f "$dir/Gemfile" ] && return
        dir="$(dirname $dir)"
    done
    false
}

run-with-bundler()
{
    if bundler-installed && within-bundled-project; then
        bundle exec "$@"
    else
        "$@"
    fi
}

## Main program

if rbenv-installed; then
    BUNDLED_COMMANDS=$(/bin/ls ~/.rbenv/shims)
else
    BUNDLED_COMMANDS="${BUNDLED_COMMANDS:-
cap
capify
cucumber
foreman
guard
haml
heroku
html2haml
rackup
rails
rake
rake2thor
rspec
ruby
sass
sass-convert
serve
shotgun
spec
spork
thin
thor
tilt
tt
turn
unicorn
unicorn_rails
}"
fi

for CMD in $BUNDLED_COMMANDS; do
    if [[ $CMD != "bundle" && $CMD != "gem" ]]; then
        alias $CMD="run-with-bundler $CMD"
    fi
done