slack notifier for AWS EC2 deployment

notify.sh

#!/usr/bin/env bash

ID=`curl http://169.254.169.254/latest/meta-data/instance-id`
EC2_NAME=`aws ec2 describe-instances --instance-ids  $ID | jq .Reservations[0].Instances[0].Tags[].Value | paste -sd ' ' - | sed -e 's/\"/ /g'`
HASH=`git rev-parse HEAD`
SHORT_HASH=`echo $HASH | head -c 6`
COMMENT=`git log --format=%B -n 1 HEAD`
BB_URL_PREFIX="https://bitbucket.org/team/project/commits"
HOST=`hostname`
REPO=$(basename `git rev-parse --show-toplevel`)

STR=`echo "commit $SHORT_HASH has been depoyed to $HOST"`
INFO=`echo "$SHORT_HASH : $COMMENT"`
URL=`echo "detail: $BB_URL_PREFIX"`

read -d '' JSON << EOD
{   
    "attachments": [
        {   
            "color": "good",
            "title_link": "$BB_URL_PREFIX/$HASH",
            "title": "$SHORT_HASH   has beeen deploy to   $EC2_NAME",
            "text": "commit message: \`$COMMENT\`
detail: $BB_URL_PREFIX/$HASH"
        }
    ]
}
EOD

curl -X POST -H 'Content-type: application/json' --data "$JSON" \
https://hooks.slack.com/services/xxxx/xxxxx/xxxxxxxxxx

https://gist.github.com/johnroyer/67dff49c4d584096c0406c172e34fd67#file-notify-sh-L22

How about
"text": "$SHORT_HASH has been deploy to $EC2_NAME"

or

"text": "$(echo $SHORT_HASH) has been deploy to $(echo $EC2_NAME)"

Seems better.
Thanks !!!

script updated. Thanks to @yen3

FYI: https://github.com/rockymadden/slack-cli

jq 有幾個 options 可以幫忙處理 JSON escape 的問題

• --arg
• --argjson
• --argfile
• --slurpfile

https://stedolan.github.io/jq/manual/#Invokingjq

For example:

$ jq --null-input \
    --arg title 'deploy to "master"' \
    '{"title": "\($title)"}'

{
  "title": "deploy to \"master\""
}