Small go project that can be run as a build step in TeamCity, to post changes for the current build to a slack channel.

You'll need to set the following parameters in the TC build:

env.SLACKWEBHOOKURL: Generate this on https://api.slack.com/incoming-webhooks
env.TCBUILDID: %teamcity.build.id%
env.TCPASS: %system.teamcity.auth.password%
env.TCUSER: %system.teamcity.auth.userId%
env.TCHOST: %teamcity.serverUrl%