#!/usr/bin/env ruby

require 'sm'

URL = ENV['SLACK_WEBHOOK_URL']

channel = ARGV.shift
content = ARGV.empty? ? ARGF.read : StringIO.new(ARGV.join("\n")).read
exit 0 if content.empty?

username   = ENV['SLACKBOT_USERNAME'] || 'slackbot'
icon_emoji = ENV['SLACK_MSG_ICON_EMOJI'] || ':ghost:'

begin
  Sm.psm(channel, content, username, icon_emoji, URL)
rescue Sm::Error => e
  puts "Error posting to slack #{e.message}:\n#{e.backtrace.join("\n")}"
end