Disable Appveyor builds on branches.

Our account for Appveyor allows only 1 concurrent build. Our current Appveyor config builds every commit to a PR twice -- once as the PR and once as the branch. This CL updates our Appveyor config to disable builds on branches, so we get only one build per PR commit. PiperOrigin-RevId: 320734870
google · Jul 11, 2020 · 1715884 · 1715884
1 parent 02a072f
commit 1715884
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/appveyor.yml b/appveyor.yml
@@ -1,4 +1,10 @@
+# Don't build branches that are not PRs, to avoid double builds.
+branches:
+  only:
+    - master
+
 os: Visual Studio 2015
+
 install:
   - ps: |
       Add-Type -AssemblyName System.IO.Compression.FileSystem