install

#!/bin/bash

reset="\e[0m"
red="\e[0;31m"
green="\e[0;32m"
yellow="\e[0;33m"
cyan="\e[0;36m"
white="\e[0;37m"

yarn="$(which yarn)";
if [ $? != 0 ] ; then
    yarn="$HOME/.yarn/bin/yarn"
fi

install_yarn=0

yarn_v="$($yarn -V 2>/dev/null)"

if [ $? != 0 ] ; then
    printf "$red> yarn is not installed\n$cyan> yarn install:$reset\n"
    install_yarn=1
else 
    printf "$green> current yarn version: $yarn_v$reset\n"
    if [ "$1" == '-c' ] ; then 
        printf "$yellow> check remote yarn version...$reset\n";
        last_v="$(curl -sL https://yarnpkg.com/latest-version)"
        printf "$cyan> remote yarn version: $last_v$reset\n"
        if [ $yarn_v \< $last_v ] ; then
            printf "$cyan> yarn upgrade:$reset\n"
            install_yarn=1
        fi
    fi
fi

if [ $install_yarn == 1 ] ; then
    curl -o- -L https://yarnpkg.com/install.sh | bash
    if [ $? != 0 ] ; then
        exit 1
    fi
fi

cd "$(dirname $0)"
printf "$green> install dependence: $reset\n"


$yarn