My Bash Profile file, for Mac Terminal

.bash_profile

# If not running interactively, don't do anything
case $- in
    *i*) ;;
    *) return;;
esac

print_greeting()
{
    if [[ -f ~/.shell.greeting ]]; then
        # Credits to:
        # http://patorjk.com/software/taag/#p=display&h=0&v=0&f=Fraktur&t=Developer
        cat ~/.shell.greeting
    fi
    return
}

print_greeting


backup_terminal_configuration()
{
    if [[ -d ~/.yandex.disk ]]; then
        if [[ ! -d ~/yandexDir ]]; then
            echo "Error: Create link to your yandex shared folder as ~/yandexDir" && return
        elif [[ ! -d ~/yandexDir/Downloads/mac_bash_scripts ]]; then
            echo "Error: Create a folder to yandex disk as ~/yandexDir/Downloads/mac_bash_scripts" && return
        fi
        cp ~/.bash_profile ~/yandexDir/Downloads/mac_bash_scripts/.bash_profile
        cp ~/.bash_history ~/yandexDir/Downloads/mac_bash_scripts/.bash_history
        cp ~/.bash_aliases ~/yandexDir/Downloads/mac_bash_scripts/.bash_aliases
        cp ~/.shell.greeting ~/yandexDir/Downloads/mac_bash_scripts/.shell.greeting
        cp ~/.short.pwd.py ~/yandexDir/Downloads/mac_bash_scripts/.short.pwd.py
    else
        echo "Yandex Disk is not supported on this mac."
    fi
    return
}

backup_terminal_configuration

# this was meeant to be an alias but since it has to run depending;
# on the current directory, it has to be a function.
commitsOnGitHub(){
    if [[ ! -d '.git' ]]; then
        echo Not a git repository.
    elif type xdg-open &> /dev/null; then
        # ubuntu
        xdg-open $(git config -l | grep url | cut -d= -f2 | cut -d. -f1,2)/commits/$(git branch | grep \* | cut -d' ' -f2)
    elif type open &> /dev/null; then
        # mac
        open $(git config -l | grep url | cut -d= -f2 | cut -d. -f1,2)/commits/$(git branch | grep \* | cut -d' ' -f2)
    fi
}

stash(){
    stash_cut(){
        git stash list | cut -d: -f2,3
    }
    if [[ ! -d '.git' ]]; then
        echo Not a git repository.
    elif [[ $1 = "+=" && ! -z $2 && ! -z $3 ]]; then
        git stash push -m $2 $3
    elif [[ $1 = "+=" && ! -z $2 ]]; then
        git stash push -m "$2"
    elif [[ $1 = "-=" && ! -z $2 ]]; then
        git stash pop $(stash_cut | grep $2 | head -1 | cut -d: -f1 | tr -d ' ')
    elif [[ $1 = "list" && ! -z $2 ]]; then
        stash_index=$(stash_cut | grep "$2" | head -1 | cut -d: -f1 | tr -d ' ')
        if [[ -z $stash_index ]]; then
            return 0
        fi
        stash_cut | grep "$2" --color=auto
        stash_cut | grep "$2" --color=auto | tr -C "*" "-"
        echo
        git stash show $stash_index
    elif [[ $1 = "list" ]]; then
        stash_cut
    else
        echo "
        Git Stash with Keywords
        Description: Using git-stash with keywords instead of indexes.

        Usage: $0 [+= <keyword> [-p <path/to/file>]] [-= <keyword>] [list [<part-of-the-keyword>]]

        $0 += <keyword>
        To stash your all of your changes.

        $0 += <keyword> [-p <path/to/file>]
        To stash spesific file(s) with stash.

        $0 -= <keyword>
        Extract a stash and remove it from the list.

        $0 list
        List the stash.

        $0 list <part-of-the-keyword>
        List what changes extracting a stash will make.
        "
    fi
    unset -f stash_cut
}

# set histfile for mac, and disable session histories
SHELL_SESSION_HISTORY=0
HISTFILE="$HOME/.bash_history"
HISTSIZE=1000000
HISTFILESIZE=1000000000

# set a fancy prompt (non-color, unless we know we "want" color)
case "$TERM" in
    xterm-color|*-256color) color_prompt=yes;;
esac

# uncomment for a colored prompt, if the terminal has the capability; turned
# off by default to not distract the user: the focus in a terminal window
# should be on the output of commands, not on the prompt
force_color_prompt=yes

if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
        # We have color support; assume it's compliant with Ecma-48
        # (ISO/IEC-6429). (Lack of such support is extremely rare, and such
        # a case would tend to support setf rather than setaf.)
        color_prompt=yes
    else
        color_prompt=
    fi
fi

if [ "$color_prompt" = yes ]; then
    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
else
    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
fi
unset color_prompt force_color_prompt

# enable color support of ls and also add handy aliases
#  Run the following installations on MAC:
#   brew install coreutils
#   mkdir ~/.dircolors
#   git clone https://github.com/gibbling666/dircolors.git ~/.dircolors
#   mkdir ~/.dircolorsSolarized
#   git clone https://github.com/seebi/dircolors-solarized.git ~/.dircolorsSolarized
if [ -x /usr/local/Cellar/coreutils/8.29/libexec/gnubin/dircolors ] || [ -x /usr/local/bin/gdircolors ]; then
    test -r ~/.dircolors && eval "$(gdircolors -b ~/.dircolorsSolarized/dircolors.256dark)" ||
    eval "$(gdircolors -b ~/.dircolors/dircolors.256dark)" || eval "$(gdircolors -b)"
    alias ls='gls --color=auto'
    alias dls='command ls'

    alias grep='grep --color=auto'
    alias fgrep='fgrep --color=auto'
    alias egrep='egrep --color=auto'
fi

# colored GCC warnings and errors
#export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01'

if [ -f ~/.bash_aliases ]; then
    . ~/.bash_aliases
fi

# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
#
# Install completions on MAC:
# brew install bash-completion
if ! shopt -oq posix; then
    if [ -f /usr/share/bash-completion/bash_completion ]; then
        . /usr/share/bash-completion/bash_completion
    elif [ -f /etc/bash_completion ]; then
        . /etc/bash_completion
    elif [ -f /usr/local/etc/bash_completion ]; then
        . /usr/local/etc/bash_completion
    fi
fi

# brew install git
if [ -f `brew --prefix`/etc/bash_completion.d/git-completion.bash ]; then
    . `brew --prefix`/etc/bash_completion.d/git-completion.bash
fi



export PROMPT_COMMAND='PS1="$(python ~/.short.pwd.py)"'
# to use simple arithmatic operations in bash install rbenv
# $ brew install rbenv
# $ = 5*6
# 30
# uncommet following lines
export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"

=() {
    echo "$(($@))"
}

# add mysql to path
export PATH="/usr/local/mysql/bin:$PATH"