cache homebrew data

See https://stackoverflow.com/questions/39930171/cache-brew-builds-with-travis-ci

cache homebrew data
See https://stackoverflow.com/questions/39930171/cache-brew-builds-with-travis-ci
1b4d2598 · Wieland Morgenstern · 8b3ba479 · 1b4d2598
Commit 1b4d2598 authored May 04, 2019 by Wieland Morgenstern
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.travis.yml .travis.yml +5 -0

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--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,11 @@ matrix:
  include:
    - name: OpenCL macOS
      os: osx
+      cache:
+        directories:
+          - $HOME/Library/Caches/Homebrew
+      before_cache:
+        - brew cleanup
      addons:
        homebrew:
          update: true