Dangerfile: Fixed how changed files are determined #2757
Merged
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I'm sure some of you noticed that the bundle size messages our bot procured sometimes contained files that were not changed in the current PR. This PR fixed that issue.
The cause of this problem was the
git diff
command.git diff
simply returns a list of files that are different between two commits/branches. However, this is now what we want. The problem is that this did not account for commits added to master after the PR branch was branched off master. The solution is to find the proper merge base commit before diffing.(I also moved up the function definition so it's closer to other git functions.)