tree 0af01a366fceb1819a968ce53ac87c86b099b2ab
parent ad1b719e57ec5b8e11ae22a20b901ee0e306346e
author Andrew Bonventre <andybons@golang.org> 1529521427 -0400
committer Andrew Bonventre <andybons@golang.org> 1529593668 +0000

cmd/gopherbot: check maintner and GitHub before adding/removing labels

This change introduces a tiered model for making changes to labels:
+ If a label exists (or does not exist in the case of removal) on an
  issue according to maintner, then no action is taken to add (or
  remove) that label.
+ Before making any requests to remove a set of labels, the GitHub
  API is checked to see which ones are already not present on the issue.
  Then it only removes the labels that exist on the issue.

Change-Id: If6693db71ad9dfc3537c462bcdbc5af8f33e5b16
Reviewed-on: https://go-review.googlesource.com/120043
Reviewed-by: Bryan C. Mills <bcmills@google.com>