bundler-exec/bundler-exec.sh

#!/bin/bash

BUNDLED_COMMANDS="${BUNDLED_COMMANDS:-
cap
capify
cucumber
foreman
haml
heroku
html2haml
guard
rackup
rails
rake
rake2thor
rspec
ruby
sass
sass-convert
serve
shotgun
spec
spork
thin
thor
tilt
turn
tt
unicorn
unicorn_rails
}"

## Functions

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

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

for CMD in $BUNDLED_COMMANDS; do
    alias $CMD="run-with-bundler $CMD"
done