custom configuration for ~/.bashrc file

.bashrc

# CUSTOM MIRRORS

export HOST_IP=$(grep -oP '(?<=nameserver\ ).*' /etc/resolv.conf)
export PORXY_ADDR="http://$HOST_IP:1080"

# PROXY FOR APT
function proxy_apt() {
    # make sure apt.conf existed
    sudo touch /etc/apt/apt.conf
    sudo sed -i '/^Acquire::https\?::Proxy/d' /etc/apt/apt.conf
    # add proxy
    echo -e "Acquire::http::Proxy \"$PORXY_ADDR\";\nAcquire::https::Proxy \"$PORXY_ADDR\";" | sudo tee -a /etc/apt/apt.conf >/dev/null
    echo "current apt proxy status: using $PORXY_ADDR, proxying"
}

function unproxy_apt() {
    sudo sed -i '/^Acquire::https\?::Proxy/d' /etc/apt/apt.conf
    echo "current apt proxy status: direct connect, not proxying"
}

# PROXY FOR NPM
function proxy_yarn() {
    yarn config set proxy $PORXY_ADDR
    yarn config set https-proxy $PORXY_ADDR
    npm config set proxy $PORXY_ADDR
    npm config set https-proxy $PORXY_ADDR
}

function unproxy_yarn() {
    yarn config delete proxy
    yarn config delete https-proxy
    npm config delete proxy
    npm config delete https-proxy
}

function proxy_npm() {
    proxy_yarn
}

function unproxy_npm() {
    unproxy_yarn
}

# if docker is not running, then start docker service
# if docker running, then `:`, else `sudo service docker start`
# The `:` Do nothing beyond expanding arguments and performing redirections. The return status is zero.
# https://www.gnu.org/software/bash/manual/html_node/Bourne-Shell-Builtins.html#Bourne-Shell-Builtins
ps -C dockerd 1>/dev/null && : || sudo service docker start 1>/dev/null

# PROXY FOR DOCKER
function proxy_docker() {
    # make sure /etc/default/docker existed
    sudo touch /etc/default/docker
    sudo sed -i '/^export https\?_proxy/Id' /etc/default/docker
    # add proxy
    echo -e "export http_proxy=\"$PORXY_ADDR\";
export https_proxy=\"$PORXY_ADDR\";
export HTTP_PROXY=\"$PORXY_ADDR\";
export HTTPS_PROXY=\"$PORXY_ADDR\";" | sudo tee -a /etc/default/docker >/dev/null &&
        sudo service docker restart &&
        echo "current docker proxy status: using $PORXY_ADDR, proxying"
}

function unproxy_docker() {
    # sudo sed -i '/^Acquire::https\?::Proxy/d' /etc/apt/apt.conf
    # 删除代理设置
    sudo sed -i '/^export https\?_proxy/Id' /etc/default/docker &&
        sudo service docker restart &&
        echo "current docker proxy status: direct connect, not proxying"
}

# GLOBAL PROXY FOR BASH

# if ~/.bash_proxy not exist , then create it.
if [ ! -f ~/.bash_proxy ]; then
    touch ~/.bash_proxy
fi
# execute ~/.bash_proxy
. ~/.bash_proxy

function proxy() {
    echo -e "export {all_proxy,http_proxy,https_proxy,ALL_PROXY,HTTP_PROXY,HTTPS_PROXY}=\"$PORXY_ADDR\";" | tee ~/.bash_proxy >/dev/null
    # apply
    . ~/.bash_proxy
    # declare
    echo "current proxy status: using $PORXY_ADDR, proxying"
}

function unproxy() {
    # unset all_proxy http_proxy https_proxy ALL_PROXY HTTP_PROXY HTTPS_PROXY
    echo -e "unset all_proxy http_proxy https_proxy ALL_PROXY HTTP_PROXY HTTPS_PROXY" | tee ~/.bash_proxy >/dev/null
    # apply
    . ~/.bash_proxy
    # declare
    echo "current proxy status:  direct connect, not proxying"
}