move NDK setup to travis_before_install.sh

.travis.yml

@@ -26,7 +26,6 @@ env:
 
 before_install:
 - source ./scripts/local_mason.sh
-#- if [ "${MASON_PLATFORM}" = "android" ]; then MASON_PLATFORM= ./.mason/mason install 7z 9.20; export PATH=$(MASON_PLATFORM= ./.mason/mason prefix 7z 9.20)/bin:${PATH}; wget http://dl.google.com/android/ndk/android-ndk-r10c-linux-x86_64.bin; chmod a+x ./android-ndk-r10c-linux-x86_64.bin; 7za x ./android-ndk-r10c-linux-x86_64.bin > /dev/null; export ANDROID_NDK_PATH=$(pwd)/android-ndk-r10c; ls -l;ls -l $ANDROID_NDK_PATH; fi;
 - source ./scripts/travis_helper.sh
 - source ./scripts/flags.sh
 - ./scripts/travis_before_install.sh

scripts/travis_before_install.sh

@@ -3,6 +3,17 @@
 set -e
 set -o pipefail
 
+if [[ "${MASON_PLATFORM}" == "android" ]]; then
+    MASON_PLATFORM= ./.mason/mason install 7z 9.20
+    7Z_PATH=$(MASON_PLATFORM= ./.mason/mason prefix 7z 9.20)/bin/7za
+    mapbox_time "fetching NDK" \
+      wget http://dl.google.com/android/ndk/android-ndk-r10c-linux-x86_64.bin
+    chmod a+x ./android-ndk-r10c-linux-x86_64.bin
+    mapbox_time "unpacking NDK" \
+      7Z_PATH x ./android-ndk-r10c-linux-x86_64.bin > /dev/null;
+    export ANDROID_NDK_PATH=$(pwd)/android-ndk-r10c;
+fi
+
 if [[ ${TRAVIS_OS_NAME} == "linux" ]]; then
     #
     # install Linux dependencies
@@ -32,9 +43,9 @@ if [[ ${TRAVIS_OS_NAME} == "linux" ]]; then
                             llvm-3.4 # required for mesa
 
 
-    unset MASON_PLATFORM
-    mapbox_time "install_mesa" \
-    mason install mesa 10.3.1
+    # TODO - figure out how to unset MASON_PLATFORM for just this command
+    #mapbox_time "install_mesa" \
+    MASON_PLATFORM= mason install mesa 10.3.1
 
     mapbox_time "install_awscli" \
     sudo pip install awscli