From 43e129e899bb5e4e87bbead730b849e125bb7513 Mon Sep 17 00:00:00 2001
From: Rich Trott <rtrott@gmail.com>
Date: Tue, 21 Aug 2018 19:15:14 -0700
Subject: [PATCH] tools: apply linting to first commit in PRs

Use Travis-CI to check the formatting of the first commit in a pull
request. This will hopefully reduce formatting errors and nits about
them in pull requests.
---
 .travis.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 3dc3a73c333b35..3acc2827975d63 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,8 @@ matrix:
         - NODE=$(which node)
       script:
         - make lint
+        # Lint the first commit in the PR.
+        - git log HEAD ^$TRAVIS_BRANCH --pretty=format:'%h' --no-merges | tail -1 | xargs npx core-validate-commit --no-validate-metadata
     - name: "Test Suite"
       install:
         - ./configure