#!/usr/bin/python2.7
#
# Trigger to post changelist info on submission to a Slack channel
# Add this trigger to your Perforce server:
#
#    slack change-content //... "/path/to/slack_trigger.py %change% %serverport%"
#
import requests
import sys
import json
import subprocess

# Required
p4user = "your p4 user"
slackbot_user = "your slack bot user"
webhook_url = 'https://hooks.slack.com/services/your_unique_key'
# Optional: set swarm_url if you want to use Swarm links
swarm_url = ""

def linkify(desc, num):
    if len(swarm_url) > 0:
        result = desc.replace("Change " + num, ">>><" + swarm_url + "/changes/" + num + "|Change " + num + ">", 1) 
        return result
    else:
        return desc

if len(sys.argv) > 1:
    change = str(sys.argv[1])
    port = str(sys.argv[2])
    output = subprocess.check_output("p4 -p " + port  + " -u " + p4user + " describe -s -m5 " + change, shell=True)
    print(output)
    description = linkify(output, change)
    data = payload={"text":description, "username":slackbot_user}
    requests.post(webhook_url, data=json.dumps(data))
else:
    print("No argument given.")