Created
July 23, 2020 14:17
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Script to send messages or alerts to Slack from console/terminal
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#!/usr/bin/env bash | |
# Installation: | |
# | |
# $ curl -s https://gist.githubusercontent.com/martingaido/85d78a4460b366a2f529abf804e09997/raw/f7a6d220b30c4c236f619da915c959802d93db2a/slack.sh --output /usr/bin/slack | |
# $ chmod +x /usr/bin/slack | |
# | |
# Usage: | |
# | |
# Send message to slack channel/user | |
# | |
# Send a message to the channel #ch-01 | |
# $ bash slack.sh '#ch-01' 'Some message here.' | |
# | |
# Send a message to the channel #ch-01 and user @me. | |
# $ bash slack.sh '#ch-01,@me' MESSAGE | |
# | |
# Send a message to the default channel (it must be declared in APP_SLACK_CHANNEL). | |
# $ bash slack.sh MESSAGE | |
# | |
# Variables: | |
# | |
# Please declare environment variables: | |
# - APP_SLACK_WEBHOOK | |
# - APP_SLACK_CHANNEL (optional) | |
# - APP_SLACK_USERNAME (optional) | |
# - APP_SLACK_ICON_EMOJI (optional) | |
# | |
# You may also declare them in ~/.slackrc file. | |
set -o pipefail | |
set -o errexit | |
set -o nounset | |
#set -o xtrace | |
APP_SLACK_WEBHOOK=HOOK-ID-HERE | |
init_params() { | |
# you may declare ENV vars in /etc/profile.d/slack.sh | |
if [ -z "${APP_SLACK_WEBHOOK:-}" ]; then | |
echo 'error: Please configure Slack environment variable: ' > /dev/stderr | |
echo ' APP_SLACK_WEBHOOK' > /dev/stderr | |
exit 2 | |
fi | |
APP_SLACK_USERNAME=${APP_SLACK_USERNAME:-$(hostname | cut --delimiter=. --fields=1)} | |
APP_SLACK_ICON_EMOJI=${APP_SLACK_ICON_EMOJI:-:slack:} | |
if [ -z "${1:-}" ]; then | |
echo 'error: Missed required arguments.' > /dev/stderr | |
echo 'note: Please follow this example:' > /dev/stderr | |
echo ' $ slack.sh "#CHANNEL1,CHANNEL2" Some message here. ' > /dev/stderr | |
exit 3 | |
fi | |
slack_channels=(${APP_SLACK_CHANNEL:-}) | |
if [ "${1::1}" == '#' ] || [ "${1::1}" == '@' ]; then | |
# explode by comma | |
IFS=',' read -r -a slack_channels <<< "${1}" | |
shift | |
fi | |
slack_message=${@} | |
} | |
send_message() { | |
local channel=${1} | |
echo 'Sending to '${channel}'...' | |
curl --silent --data-urlencode \ | |
"$(printf 'payload={"text": "%s", "channel": "%s", "username": "%s", "as_user": "true", "link_names": "true", "icon_emoji": "%s" }' \ | |
"${slack_message}" \ | |
"${channel}" \ | |
"${APP_SLACK_USERNAME}" \ | |
"${APP_SLACK_ICON_EMOJI}" \ | |
)" \ | |
${APP_SLACK_WEBHOOK} || true | |
echo | |
} | |
send_message_to_channels() { | |
for channel in "${slack_channels[@]:-}"; do | |
send_message "${channel}" | |
done | |
} | |
slack() { | |
# Set magic variables for current file & dir | |
__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)" | |
__file="${__dir}/$(basename "${BASH_SOURCE[0]}")" | |
readonly __dir __file | |
cd ${__dir} | |
if [ -f $(cd; pwd)/.slackrc ]; then | |
. $(cd; pwd)/.slackrc | |
fi | |
declare -a slack_channels | |
init_params ${@} | |
send_message_to_channels | |
} | |
if [ "${BASH_SOURCE[0]:-}" != "${0}" ]; then | |
export -f slack | |
else | |
slack ${@} | |
exit $? | |
fi |
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