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slackbot-cogman.sh
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slackbot-cogman.sh
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#!/bin/bash
set -ue -o pipefail
export LC_ALL=C
###
# configuration/slackbot-cogman.sh
# https://github.com/furplag/cogman
# Copyright 2019+ furplag
# Licensed under MIT (https://github.com/furplag/cogman/blob/main/LICENSE)
#
# script that automate to install and activate Hubot .
###
# Prerequirement
###
# variable
if declare -p indent >/dev/null 2>&1; then :;
elif declare -p symbols >/dev/null 2>&1; then
declare indent="${symbols['cogman']}${symbols['initialize']}";
else
declare -Ar symbols=(
["cogman"]='\xF0\x9F\xA4\x96'
["initialize"]='\xF0\x9F\x91\xB6'
["slackbot"]='\xF0\x9F\x91\xBB'
["success"]='\xF0\x9F\x8D\xA3'
["error"]='\xF0\x9F\x91\xBA'
["fatal"]='\xF0\x9F\x91\xB9'
["ignore"]='\xF0\x9F\x8D\xA5'
["unspecified"]='\xF0\x9F\x99\x89'
["remark"]='\xF0\x9F\x91\xBE'
)
declare indent="${symbols['cogman']}${symbols['initialize']}";
fi
if ! declare -p platform >/dev/null 2>&1; then declare -r platform='unknown'; fi
if ! declare -p project >/dev/null 2>&1; then declare -r project='unknown'; fi
if ! declare -p instance >/dev/null 2>&1; then declare -r instance="$(hostname)"; fi
if ! declare -p slackbot_user >/dev/null 2>&1; then declare -r slackbot_user='cogman'; fi
if ! declare -p slackbot_group >/dev/null 2>&1; then declare -r slackbot_group='hubot'; fi
if ! declare -p slackbot_uid >/dev/null 2>&1; then declare -ir slackbot_uid=1101; fi
if ! declare -p slackbot_gid >/dev/null 2>&1; then declare -ir slackbot_gid=1111; fi
if ! declare -p hubot_slack_token >/dev/null 2>&1; then declare -r hubot_slack_token=; fi
if ! declare -p hubot_owner_domain >/dev/null 2>&1; then declare -r hubot_owner_domain='example.com'; fi
if ! declare -p hubot_home >/dev/null 2>&1; then declare -r hubot_home="/home/${slackbot_user}/hubot-${slackbot_user}"; fi
if ! declare -p hubot_name >/dev/null 2>&1; then declare -r hubot_name="slackbot-${slackbot_user}"; fi
if ! declare -p hubot_desc >/dev/null 2>&1; then declare -r hubot_desc='Slackbot generated by Cogman .'; fi
if ! declare -p hubot_owner >/dev/null 2>&1; then declare -r hubot_owner="${slackbot_user} ${slackbot_user}.$(hostname -s)@${hubot_owner_domain}"; fi
if ! declare -p hubot_heroku_keepalive >/dev/null 2>&1; then declare -ir hubot_heroku_keepalive=1; fi
###
# function
###
# validate required variables .
#
# @param name the name of variable
# @return returns the result tests whether the variable has no value, or not .
function _is_empty() {
if [[ -z ${1:-} ]]; then return 0;
elif [[ -z "$(eval echo \"\$${1:-}\")" ]]; then return 0; else return 1; fi
}
###
# validate required variables .
#
# @param indent
# @return returns the result tests whether the variable has no value, or not .
function _validate() {
local -r _indent="${1:-${indent}${symbols['slackbot']}}"
local -i _result=0
for _var in 'slackbot_group' 'slackbot_user' 'slackbot_uid' 'hubot_slack_token'; do
if _is_empty $_var; then
echo -e "${_indent}${symbols['unspecified']}: the value of \"\$${_var}\" not spacified ."
_result=1
break
fi
done
return $_result
}
function _create_slackbot_user() {
local -r _indent="${1:-${indent}${symbols['slackbot']}}"
local -i _result=0
# create slackbot group
if getent group "${slackbot_group}" >/dev/null 2>&1; then echo -e "${_indent}${symbols['ignore']}: the group \"${slackbot_group}\" already exists .";
elif [[ "${slackbot_group}" = "${slackbot_user}" ]]; then :;
elif groupadd -g ${slackbot_gid} "${slackbot_group}" >/dev/null 2>&1; then echo -e "${_indent}${symbols['success']}: create slackbot group \"${slackbot_group}\" ( $(getent group "${slackbot_group}" | awk -F '[::]' '{print $3}') ) .";
elif groupadd -g $((${slackbot_gid} + 1)) "${slackbot_group}" >/dev/null 2>&1; then echo -e "${_indent}${symbols['success']}: create slackbot group \"${slackbot_group}\" ( $(getent group "${slackbot_group}" | awk -F '[::]' '{print $3}') ) .";
elif groupadd "${slackbot_group}" 2>/dev/null; then echo -e "${_indent}${symbols['success']}: create slackbot group \"${slackbot_group}\" ( $(getent group "${slackbot_group}" | awk -F '[::]' '{print $3}') ) .";
else echo -e "${_indent}${symbols['error']}: could not create group \"${slackbot_group}\" ."; fi
if getent passwd "${slackbot_user}" >/dev/null 2>&1; then echo -e "${_indent}${symbols['ignore']}: user \"${slackbot_user}\" already exists .";
elif useradd -u ${slackbot_uid} "${slackbot_user}" -d /home/${slackbot_user} >/dev/null 2>&1; then echo -e "${_indent}${symbols['success']}: create slackbot user \"${slackbot_user}\" ( $(getent passwd "${slackbot_user}" | awk -F '[::]' '{print $3}') ) .";
elif useradd -u $((${slackbot_uid} + 1)) "${slackbot_user}" -d /home/${slackbot_user} >/dev/null 2>&1; then echo -e "${_indent}${symbols['success']}: create slackbot user \"${slackbot_user}\" ( $(getent passwd "${slackbot_user}" | awk -F '[::]' '{print $3}') ) .";
elif useradd "${slackbot_user}" -d /home/${slackbot_user} >/dev/null 2>&1; then echo -e "${_indent}${symbols['success']}: create slackbot user \"${slackbot_user}\" ( $(getent passwd "${slackbot_user}" | awk -F '[::]' '{print $3}') ) .";
else _result=1; echo -e "${_indent}${symbols['error']}: could not create user \"${slackbot_user}\" ."; fi
local -ir _uid=$(getent passwd "${slackbot_user}" | awk -F '[::]' '{print $3}')
if [[ $_uid -gt 0 ]]; then
if usermod -aG "${slackbot_group}" "${slackbot_user}"; then :;
else echo -e "${_indent}${symbols['error']}: could not associate user \"${slackbot_user}\" to group \"${slackbot_group}\" ."; fi
elif [[ "${slackbot_user}" = 'root' ]]; then :;
else _result=1; fi
return $_result
}
function _install_nodejs() {
local -r _indent="${1:-${indent}${symbols['slackbot']}}"
local -i _result=0
if node -v >/dev/null 2>&1 && npm -v >/dev/null 2>&1; then echo -e "${_indent}${symbols['ignore']}: Node.js installed, already .";
elif bash <(curl https://rpm.nodesource.com/setup_lts.x -LfsS) >/dev/null 2>&1 && sed -i -e 's/enabled \?=\?1/enabled=0/' /etc/yum.repos.d/nodesource*.repo; then
if dnf install nodejs -y --enablerepo=nodesource >/dev/null 2>&1; then echo -e "${_indent}${symbols['success']}: Node.js installed .";
elif yum install nodejs -y --enablerepo=nodesource >/dev/null 2>&1; then echo -e "${_indent}${symbols['success']}: Node.js installed .";
else _result=1; echo -e "${_indent}${symbols['error']}: failed install Node.js ."; fi
else _result=1; echo -e "${_indent}${symbols['error']}: failed install Node.js ."; fi
return $_result
}
function _install_node_modules() {
local -r _indent="${1:-${indent}${symbols['slackbot']}}"
local -i _result=0
for module in yo generator-hubot; do
if [[ $_result -ne 0 ]]; then :;
elif npm install -g $module >/dev/null 2>&1; then echo -e "${_indent}${symbols['success']}: Node modules ( ${module} ) installed .";
else echo -e "${_indent}${symbols['error']}: failed install Node modules ( ${module} ) ."; _result=1; fi
done
return $_result
}
function _install_redis() {
local -r _indent="${1:-${indent}${symbols['slackbot']}}"
local -i _result=0
if [[ "`redis-cli ping 2>/dev/null`" = 'PONG' ]]; then echo -e "${_indent}${symbols['ignore']}: Redis is running, already .";
elif systemctl start redis >/dev/null 2>&1; then echo -e "${_indent}${symbols['ignore']}: Redis is running, already .";
elif dnf install redis -y >/dev/null 2>&1 && systemctl start redis >/dev/null 2>&1 && systemctl enable redis >/dev/null 2>&1; then
echo -e "${_indent}${symbols['success']}: ready to use Redis server .";
elif yum install epel-release -y >/dev/null 2>&1 && yum install redis -y >/dev/null 2>&1 && systemctl start redis >/dev/null 2>&1 && systemctl enable redis >/dev/null 2>&1; then
echo -e "${_indent}${symbols['success']}: ready to use Redis server .";
else echo -e "${_indent}${symbols['error']}: failed start up Redis ."; _result=1; fi
return $_result
}
function _install_hubot() {
local -r _indent="${1:-${indent}${symbols['slackbot']}}"
local -i _result=0
if [[ -d "${hubot_home}" ]]; then echo -e "${_indent}${symbols['ignore']}: directory \"${hubot_home}\" already exists .";
elif sudo -i -u ${slackbot_user} bash -c "mkdir -p ${hubot_home}" >/dev/null 2>&1; then :;
else _result=1; echo -e "${_indent}${symbols['error']}: failed create directory \"${hubot_home}\" ."; fi
local _command="`which yo` hubot --no-insight --owner=\"${hubot_owner}\" --name=${hubot_name} --description=\"${hubot_desc}\" --adapter=slack"
if [[ $_result -ne 0 ]]; then :;
elif [[ -f ${hubot_home}/bin/hubot ]]; then echo -e "${_indent}${symbols['ignore']}: Hubot ( ${hubot_home}/bin/hubot ) already exists .";
elif sudo -i -u ${slackbot_user} bash -c "cd ${hubot_home} && ${_command} && cd -"; then
echo -e "${_indent}${symbols['success']}: Hubot activate .";
else _result=1; echo -e "${_indent}${symbols['error']}: failed construction Hubot ."; fi
if [[ $_result -eq 0 ]] && [[ -f "${hubot_home}/external-scripts.json" ]] && [[ ! "${hubot_heroku_keepalive:-1}" = "0" ]]; then
sed -i -e 's/^.*hubot-heroku-keepalive.*$//' ${hubot_home}/external-scripts.json
fi
return $_result
}
function _daemonize_slackbot() {
local -r _indent="${1:-${indent}${symbols['slackbot']}}"
local -i _result=0
if systemctl status slackbot-cogman.service >/dev/null 2>&1; then echo -e "${_indent}${symbols['ignore']}: slackbot-cogman.service is running, already .";
elif systemctl list-unit-files --type=service | grep -E '^slackbot-cogman\.service' >/dev/null 2>&1; then echo -e "${_indent}${symbols['ignore']}: slackbot-cogman.service already available .";
else cat <<_EOT_>/etc/systemd/system/slackbot-cogman.service
[Unit]
Description=Hubot - Slack, Cogman
Requires=redis.service
[Service]
User=${slackbot_user}
Group=${slackbot_group}
WorkingDirectory=${hubot_home}
Environment=HUBOT_SLACK_TOKEN=${hubot_slack_token}
ExecStart=/bin/sh -c "bin/hubot --adapter slack"
ExecStop=/bin/kill \$MAINPID
[Install]
WantedBy=multi-user.target
_EOT_
fi
if [[ -f /etc/systemd/system/slackbot-cogman.service ]]; then :;
else _result=1; echo -e "${_indent}${symbols['error']}: failed construction Hubot ."; fi
if [[ $_result -ne 0 ]]; then :;
elif systemctl daemon-reload && systemctl start slackbot-cogman.service 2>/dev/null 2>&1 &&
systemctl status slackbot-cogman.service >/dev/null 2>&1 &&
systemctl enable slackbot-cogman.service >/dev/null 2>&1; then
echo -e "${_indent}${symbols['success']}: Slackbot deamonized, running named as \"slackbot-cogman\" .";
else _result=1; fi
[[ $_result -ne 0 ]] && echo -e "${_indent}${symbols['error']}: failed construction Hubot .";
return $_result
}
_validate && _install_redis && _install_nodejs && _install_node_modules && _create_slackbot_user && _install_hubot && _daemonize_slackbot