hev-socks5-tunnel installer

hev-socks5-tunnel-installer.sh

#!/bin/bash
RELEASE_API="https://api.github.com/repos/heiher/hev-socks5-tunnel/releases/latest"
BIN_DST_DIR=/usr/local/bin
RESOURCE_DST_DIR=/usr/local/etc/hev-socks5-tunnel

function getReleaseInfo() {
    response=$(curl ${RELEASE_API})
    if [ $? == 0 ]; then
        echo $response
        return 0
    else
        return 1
    fi      
}

function check_error() {
    if [ $? == 1 ]; then
        echo $1
        exit 1
    fi
}

function install() {
    assetDownloadUrl=$(curl $RELEASE_API  | jq -r ".assets[] | select(.name == \"hev-socks5-tunnel-linux-x86_64\") | .browser_download_url")
    echo $assetDownloadUrl
    wget -O ${BIN_DST_DIR}/hev-socks5-tunnel $assetDownloadUrl
    check_error "download binary error!"
    chmod +x ${BIN_DST_DIR}/hev-socks5-tunnel
    mkdir $RESOURCE_DST_DIR
    cat << EOT > ${RESOURCE_DST_DIR}/config.yml
tunnel:
  # Interface name
  name: tun0
  # Interface MTU
  mtu: 8500
  # Multi-queue
  multi-queue: false
  # IPv4 address
  ipv4: 198.18.0.1
  # IPv6 address
  ipv6: 'fc00::1'

socks5:
  # Socks5 server port
  port: 1080
  # Socks5 server address (ipv4/ipv6)
  address: 127.0.0.1
  # Socks5 UDP relay mode (tcp|udp)
  udp: 'udp'
  # Socks5 server username
# username: 'username'
  # Socks5 server password
# password: 'password'

#misc:
   # task stack size (bytes)
#  task-stack-size: 20480
   # connect timeout (ms)
#  connect-timeout: 5000
   # read-write timeout (ms)
#  read-write-timeout: 60000
   # stdout, stderr or file-path
#  log-file: stderr
   # debug, info, warn or error
#  log-level: warn
   # If present, run as a daemon with this pid file
#  pid-file: /run/hev-socks5-tunnel.pid
   # If present, set rlimit nofile; else use default value
#  limit-nofile: 65535
EOT
    cat << EOT > /etc/systemd/system/hev-socks5-tunnel.service
[unit]
Description=hev-socks5-tunnel

Wants=network.target
After=syslog.target network-online.target

[Service]
Type=simple
Environment=GOGC=20
ExecStart=${BIN_DST_DIR}/hev-socks5-tunnel ${RESOURCE_DST_DIR}/config.yml
Restart=on-failure
RestartSec=10
KillMode=process
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target
EOT
    systemctl enable --now hev-socks5-tunnel
    clear
    echo "finished"
}

function remove() {
    systemctl stop hev-socks5-tunnel
    systemctl disable hev-socks5-tunnel
    rm -rf /etc/systemd/system/hev-socks5-tunnel.service
    rm -rf ${BIN_DST_DIR}/hev-socks5-tunnel
    rm -rf $RESOURCE_DST_DIR
    clear
    echo "remove finished!"
}

function help() {
    cat << EOF
    hev-socks5-server install helper!!!
    usage: 
    ./hev-socks5-tunnel.sh menu
    install: install hev-socks5-tunnel
    remove: remove hev-socks5-tunnel
EOF
}

function main() {
    if [ $# -lt 1 ]; then
        help
    else
        case $1 in
            install)
                install
            ;;
            remove)
                remove
            ;;
            *)
                echo 'command not found!'
                help
            ;;
        esac
    fi
    exit 0
}

main $@