Fish config for Python and current git branch display on MacOS X with Homebrew

gistfile1.sh

#
# Environment variables
#

# set PATH and PYTHONPATH to use Homebrew 
set PATH /usr/local/Cellar /usr/local/bin /usr/local/sbin /usr/local/share/python $PATH
set PYTHONPATH /usr/local/lib/python $PYTHONPATH
set BROWSER 'open'

#
# Aliases
#

function ll -d "List directory content with more infos"
    ls -ali
end

function mongo-start -d "Start Mongo"
    mongod run --config /usr/local/etc/mongod.conf
end

function nginx-start -d "Start nginx"
    sudo /usr/local/sbin/nginx
end

function nginx-stop -d "Stop nginx"
    sudo kill (command cat /usr/local/var/run/nginx.pid);
end


function pg-start -d "Start Postgres"
    sudo -u _postgres pg_ctl -D /usr/local/var/postgres start
end

function pg-stop -d "Stop Postgres"
    sudo -u _postgres pg_ctl -m fast -D /usr/local/var/postgres stop
end

function rabbit-start -d "Start RabbitMQ"
    rabbitmq-server -detached
end

#
# Shell enhancements
#

# Display current git branch https://gist.github.com/2902198
set fish_git_dirty_color red
function parse_git_dirty
         git diff --quiet HEAD ^&-
         if test $status = 1
            echo (set_color $fish_git_dirty_color)"Δ"(set_color normal)
         end
end
function parse_git_branch
         # git branch outputs lines, the current branch is prefixed with a *                                                                 
         set -l branch (git rev-parse --abbrev-ref HEAD)
         echo $branch (parse_git_dirty)
end

function fish_prompt
         if test -z (git branch --quiet 2>| awk '/fatal:/ {print "no git"}')
            printf '%s@%s %s%s%s (%s) $ ' (whoami) (hostname|cut -d . -f 1) (set_color $fish_color_cwd) (prompt_pwd) (set_color normal) (parse_git_branch)
         else
            printf '%s@%s %s%s%s $ '  (whoami) (hostname|cut -d . -f 1) (set_color $fish_color_cwd) (prompt_pwd) (set_color normal)
         end
end