msys2 on windows

.bashrc

export PYTHONIOENCODING=utf8
# PROMPT_COMMAND="prompt-command"

# cache init
source activate base
if [[ -z "$my_pragma_once" ]]; then
    source ~/.bashfiles/color.sh  # available at https://gist.github.com/thautwarm/d43e17a6c2e48ac7d420281779e9399b
    source "$(scoop prefix git)\etc\profile.d\git-prompt.sh"
    source /usr/share/bash-completion/bash_completion
    export PATH=$HOME/scoop/shims:$PATH
    export my_pragma_once=1
fi

HISTSIZE=100000
HISTFILESIZE=200000
HOME=~
HISTFILE=~/.bashistory

bind 'set show-all-if-ambiguous on'
bind 'TAB:menu-complete'
bind '"\e[A": history-search-backward'
bind '"\e[B": history-search-forward'
bind '"\eOA": history-search-backward'
bind '"\eOB": history-search-forward'

function setup-bash-git(){
    git config --global core.autocrlf false
    git config --global core.eol lf
    git config --global core.editor "emacs"
    git clone https://github.com/powerline/fonts.git --depth=1
    pacman -S make
    # install
    cd fonts
    ./install.sh
    # git config --global core.editor "code --wait"
    echo "Manually install Caskaydia Nerd fonts!"
}


STATUS_THEME_PROMPT_BAD="${bold_red}💢${reset_color}${normal} "
STATUS_THEME_PROMPT_OK="${bold_green}✅${reset_color}${normal} "

function mode-simple(){
    SIMPLE_PROMPT=1
}

function mode-pretty(){
    SIMPLE_PROMPT=
}

function j(){
    cd "$(ajmp complete $@)"
}

function chpwd(){
    ajmp update "$PWD"
}

function prompt-command(){
    # record history
    history -a
    
    # apply chpwd
    if [[ "$LASTWD" !=  "$PWD" ]]; then
        chpwd
    fi
    LASTWD=$PWD

    # set prompt status
    if [ $? -eq 0 ]
    then
        my_status=" $STATUS_THEME_PROMPT_OK"
    else
        my_status=" $STATUS_THEME_PROMPT_BAD"
    fi

    # compute PS1
    local git_ps branch untracked dirty py
    if [[ -z "$SIMPLE_PROMPT" ]]; then
        if command -v python &> /dev/null
        then
            py=" ${blue} $(python --version | sed 's/[[:alpha:]|(|[:space:]]//g')${reset_color}"
        fi
        git rev-parse 2> /dev/null
        if [[ $? -eq 0 ]]; then
            branch=$(git branch 2>/dev/null | grep '*' | sed 's/* \(.*\)/\1/')
            if [[ -n $(git status -s) ]]; then
                untracked="${yellow}●${reset_color}"
            fi
            git diff --quiet || dirty="${red}✘${reset_color}"
            git_ps=" ${cyan} (${branch}${reset_color}${dirty}${untracked}${cyan})${reset_color}"
            
        fi
    fi
    PS1="\n${blue} \u ${reset_color}${yellow} \D{}${reset_color}${git_ps}${py}${my_status}${blue} \w\n ${normal}"
    PS2=" "
}
export CLASSPATH=".:/usr/local/lib/antlr-4.9.2-complete.jar:$CLASSPATH"
alias antlr4='java -jar /usr/local/lib/antlr-4.9.2-complete.jar'
alias grun='java org.antlr.v4.gui.TestRig'
bind '"\C-H":backward-kill-word'