slackpost.sh

#!/bin/bash

# Usage: slackpost <username> <channel> <message>

# Enter the name of your slack host here - the thing that appears in your URL:
# https://slackhost.slack.com/
slackhost=HOST_HERE

token=TOKEN_HERE
userName=$1

if [[ $userName == "" ]]
then
        echo "No username specified"
        exit 1
fi

shift

channel=$1
if [[ $channel == "" ]]
then
        echo "No channel specified"
        exit 1
fi

shift

text=$*

if [[ $text == "" ]]
then
        echo "No text specified"
        exit 1
fi

escapedText=$(echo $text | sed 's/"/\"/g' | sed "s/'/\'/g" )
json="{\"channel\": \"#$channel\", \"text\": \"$escapedText\", \"username\": \"$userName\"}"

curl -s -d "payload=$json" "https://$slackhost.slack.com/services/hooks/incoming-webhook?token=$token"