Publishing to slack #channel as jenkins

publish.py

"""
to set up auth token first authorize jenkins as an slack app and install 
https://wiki.jenkins.io/display/JENKINS/Slack+Plugin
Afterwards, use https://plugins.jenkins.io/credentials-binding, which is most likely available in your jenkins install
and use the instructions from there to share credentials with job. Accessing credentials in python requires: os.environ['xxx']
"""
import os
import requests
import json

requests.post(' https://domain.slack.com/services/hooks/jenkins-ci/'+os.environ["slack-auth-token"], data =json.dumps({"channel": "portal","text":"my message"}))

publish.sh

#!/bin/bash -ex

# send notification about commits pushed to $1 branch

#!/bin/bash -ex
message="Following commits were just pushed to $1 branch:"
changelog=$(git log ${GIT_PREVIOUS_SUCCESSFUL_COMMIT}..HEAD)
fullmessage="$message $changelog"
curl -X POST -H "Content-type: application/json"  \
https://fraudnet.slack.com/services/hooks/jenkins-ci/${SLACK_AUTH_TOKEN} \
--data-binary @- << EOF

{
	"channel": "portal",
    "text": " ${fullmessage//\"/$q_mid}"
   
}

EOF

If other ways of sending messages to slack are required, check their documentation for incoming webhooks. This allows to send basically any info to slack as "webhook".