This is a short article on how we integrate stash and slack in openmind
First of all i assume you have:
- a working stash installation
 - a repository you to notify slack on pushes
 - stash user with administration priviledges
 - full access to the server (linux) where stash is installed on
 - a team configured on slack
 - slack user with administration priviledges
 
Access your stash server and create a script
vim /home/appuser/stash_slack.sh
Paste the following:
#!/bin/bash
echo "Notify commits to slack"
channel=$2
icon=$4
payload="payload={\"channel\":\"$channel\",\"username\":\"webhookbot\",\"text\":\"Push on ${STASH_REPO_NAME} by ${STASH_USER_NAME} <$STASH_USER_EMAIL>\",\"icon_emoji\":\"$icon\",\"attachments\":["
while read from_ref to_ref ref_name; do
  message=`git log --format=%B -n 1 ${to_ref}`
  title="[$STASH_REPO_NAME:$ref_name] <$3/commits/$to_ref|$to_ref>: $message"
  payload="$payload{\"fallback\":\"$title\",\"pretext\":\"$title\"},"
done
payload="${payload%?}]}"
curl -X POST --data-urlencode "$payload" $1
and save.
Make it executable
chmod +x /home/appuser/stash_slack.sh
- Access to slack: https://YOUR_TEAM.slack.com/services/new (replace YOUR_TEAM with your team name)
 - Select "Incoming WebHooks"
 - Choose a channel from drop-down and click "Add incoming WebHook"
 - You have a new webhook configured! Copy the URL under "Your Unique Webhook URL"
 
- Access to stash web interface
 - Go to your repository
 - Click on Settings
 - Click on Hooks
 - Click on "Add Hook" button and then on "Search"
 - Search for "External Hooks" and click "Install"
 - Once installed, go back to Hooks page in your repository
 - Click on "Enable" on the "External Post Receive Hook" row (not pre-receive)
 - Put the full path to the stash_slack.sh executable script in "Executable" field: 
/home/appuser/stash_slack.sh - Fill "Positional Parameters" with:
- 1st line: Web hook url you copied at last point in previous paragraph
 - 2nd line: Channel name (#general)
 - 3rd line: full path to your web interface repository page (without trailing slash)
 - 4th line: emoji for your notification (:rocket:)
 
 
https://openmindonline.slack.com/services/hooks/incoming-webhook?token=6PPy9nEngOuRhl79XbSPrRCK
#general
https://your_stash_server/projects/ACME/repos/foo
:rocket:
Everything should work! Try to push something!
HTH