slackcat

slackcat is a command line tool that posts messages to Slack.

$ echo "hello" | slackcat

Installation

If you have a working Go installation run go get github.com/skattyadz/slackcat.

There's also a debian package in the MxM APT Repo

Configuration

You need to create an Incoming Webhook integration.

You can then configure slackcat through a config file and/or environment variables.

JSON File

{
    "webhook_url":"https://hooks.slack.com/services/super/secret/token"
}

In /etc/slackcat.conf, ~/.slackcat.conf or ./slackcat.conf

Optional keys: channel, username, icon_emoji, proxy. See slackcat-example.conf for a full example.

Environment Variable

$ export SLACKCAT_WEBHOOK_URL=https://hooks.slack.com/services/super/secret/token

Will override file config.

Optional vars: SLACKCAT_CHANNEL, SLACKCAT_USERNAME, SLACKCAT_ICON, https_proxy

Usage

slackcat will take each line from stdin and post it as a message to Slack:

tail -F logfile | slackcat

Be aware that if a file outputs blank lines, this will result in a 500 error from slack. You can remedy this using grep to filter out blank lines:

tail -F logfile | grep --line-buffered -v '^\s*$' | slackcat

If you'd prefer to provide a message on the command line, you can:

sleep 300; slackcat "done"

Name

Default: user@hostname

echo ":coffee:" | slackcat --name "coffeebot"

Channel

Default: Slack Webhook default

echo "don't forget the # sign" | slackcat --channel #test
echo "message from slackbot" | slackcat --channel @skattyadz

Icon (emoji)

echo "we're watching you" | slackcat --icon=:family:

Proxy

Default: None

echo "I am not able to connect directly" | slackcat --proxy=http://proxy.example.com:3128