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diff --git a/.oh-my-zsh/plugins/bundler/bundler.plugin.zsh b/.oh-my-zsh/plugins/bundler/bundler.plugin.zsh
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+alias be="bundle exec"
+alias bl="bundle list"
+alias bp="bundle package"
+alias bo="bundle open"
+alias bout="bundle outdated"
+alias bu="bundle update"
+alias bi="bundle_install"
+alias bcn="bundle clean"
+
+bundled_commands=(
+  annotate
+  cap
+  capify
+  cucumber
+  foodcritic
+  guard
+  hanami
+  irb
+  jekyll
+  kitchen
+  knife
+  middleman
+  nanoc
+  pry
+  puma
+  rackup
+  rainbows
+  rake
+  rspec
+  shotgun
+  sidekiq
+  spec
+  spork
+  spring
+  strainer
+  tailor
+  taps
+  thin
+  thor
+  unicorn
+  unicorn_rails
+)
+
+# Remove $UNBUNDLED_COMMANDS from the bundled_commands list
+for cmd in $UNBUNDLED_COMMANDS; do
+  bundled_commands=(${bundled_commands#$cmd});
+done
+
+# Add $BUNDLED_COMMANDS to the bundled_commands list
+for cmd in $BUNDLED_COMMANDS; do
+  bundled_commands+=($cmd);
+done
+
+## Functions
+
+bundle_install() {
+  if ! _bundler-installed; then
+    echo "Bundler is not installed"
+  elif ! _within-bundled-project; then
+    echo "Can't 'bundle install' outside a bundled project"
+  else
+    local bundler_version=`bundle version | cut -d' ' -f3`
+    if [[ $bundler_version > '1.4.0' || $bundler_version = '1.4.0' ]]; then
+      if [[ "$OSTYPE" = (darwin|freebsd)* ]]
+      then
+        local cores_num="$(sysctl -n hw.ncpu)"
+      else
+        local cores_num="$(nproc)"
+      fi
+      bundle install --jobs=$cores_num $@
+    else
+      bundle install $@
+    fi
+  fi
+}
+
+_bundler-installed() {
+  which bundle > /dev/null 2>&1
+}
+
+_within-bundled-project() {
+  local check_dir="$PWD"
+  while [ "$check_dir" != "/" ]; do
+    [ -f "$check_dir/Gemfile" ] && return
+    check_dir="$(dirname $check_dir)"
+  done
+  false
+}
+
+_binstubbed() {
+  [ -f "./bin/${1}" ]
+}
+
+_run-with-bundler() {
+  if _bundler-installed && _within-bundled-project; then
+    if _binstubbed $1; then
+      ./bin/$@
+    else
+      bundle exec $@
+    fi
+  else
+    $@
+  fi
+}
+
+## Main program
+for cmd in $bundled_commands; do
+  eval "function unbundled_$cmd () { $cmd \$@ }"
+  eval "function bundled_$cmd () { _run-with-bundler $cmd \$@}"
+  alias $cmd=bundled_$cmd
+
+  if which _$cmd > /dev/null 2>&1; then
+    compdef _$cmd bundled_$cmd=$cmd
+  fi
+done