.bash_aliases with git shortcuts

.bash_aliases

HISTSIZE=10000
export HISTSIZE

bind '"\e[A": history-search-backward'
bind '"\e[B": history-search-forward'

source /etc/bash_completion.d/git
export PS1='[\u@\h:\w $(__git_ps1 "(%s)")]\$ '

__define_git_completion () {
eval "
    _git_$2_shortcut () {
        COMP_LINE=\"git $2\${COMP_LINE#$1}\"
        let COMP_POINT+=$((4+${#2}-${#1}))
        COMP_WORDS=(git $2 \"\${COMP_WORDS[@]:1}\")
        let COMP_CWORD+=1

        local cur words cword prev
        _get_comp_words_by_ref -n =: cur words cword prev
        _git_$2
    }
"
}

__git_shortcut () {
    type _git_$2_shortcut &>/dev/null || __define_git_completion $1 $2
    alias $1="git $2 $3"
    complete -o default -o nospace -F _git_$2_shortcut $1
}

__git_shortcut  ga    add
__git_shortcut  gb    branch
__git_shortcut  gba   branch -a
__git_shortcut  gc    commit '-v -m'
__git_shortcut  gca   commit '-a -v -m'
__git_shortcut  gco   checkout
__git_shortcut  gd    diff
__git_shortcut  gdc   diff --cached
__git_shortcut  gds   diff --stat
__git_shortcut  gf    flow
__git_shortcut  gl    log
__git_shortcut  glp   log -p
__git_shortcut  gls   log --stat
__git_shortcut  gs    status
__git_shortcut  gull  pull
__git_shortcut  gsub  submodule
__git_shortcut  gush  push