More CI tweaks, macOS caching homebrew

.travis.yml

@@ -4,6 +4,8 @@ cache:
   directories:
     - ${HOME}/PawPawBuilds/debs
     - ${HOME}/PawPawBuilds/downloads
+    - ${HOME}/Library/Caches/Homebrew
+    - /usr/local/Homebrew
 
 env:
   global:
@@ -61,11 +63,10 @@ jobs:
           packages:
             - cmake
             - jq
-            - meson
           update: true
       env:
         - TARGET="macos"
-        - PLUGINS="${PLUGINS_BASE} ${PLUGINS_CROSS} ${PLUGINS_DISTRHO}"
+        - PLUGINS="${PLUGINS_BASE} ${PLUGINS_CROSS}"
       osx_image: xcode9.4
 
 before_install:
@@ -78,6 +79,9 @@ script:
   - bash ${TRAVIS_BUILD_DIR}/bootstrap-plugins.sh ${TARGET}
   - bash ${TRAVIS_BUILD_DIR}/build-plugins.sh ${TARGET} ${PLUGINS}
 
+before_cache:
+  - bash ${TRAVIS_BUILD_DIR}/.travis/before_cache.sh
+
 before_deploy:
   - bash ${TRAVIS_BUILD_DIR}/pack-plugins.sh ${TARGET} ${PLUGINS}
 

.travis/before_cache.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+set -e
+
+# nothing to do except for macOS native
+if [ "${TARGET}" != "macos" ]; then
+    exit 0
+fi
+
+brew cleanup
+find /usr/local/Homebrew \! -regex ".+\.git.+" -delete