[build] Refactor and simplify build system

* Main gyp files are now standardized as platform/<platform>/platform.gyp.
* Each platform gyp file defines appropriate loop_lib and headless_lib variables.
* Each platform gyp file includes mbgl.gypi, which defines base targets which may be useful to all platforms.
* CI targets are consistent across platforms: `make $(PLATFORM) && make test-$(PLATFORM)`.
* Renamed the "linux" test app to "glfw". It's now built in OS X CI.
* Android build flakiness is fixed.
* iOS CI builds the bench and iosapp targets.
* Mesa version is now in one place.
* CI scripts use bash "strict mode" and correct error handling.
* All build output goes to the build directory.
* Removed vestigial iOS/OS X/Android Travis scripts.

1 files changed, 56 insertions, 0 deletions

diff --git a/scripts/travis_setup.sh b/scripts/travis_setup.sh
new file mode 100755
index 0000000000..e9fa87811f
--- /dev/null
+++ b/scripts/travis_setup.sh
@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+# This script is sourced; do not set -e or -o pipefail here.
+
+if [ ! -z "${_CXX}" ]; then export CXX="${_CXX}" ; fi
+if [ ! -z "${_CC}" ]; then export CC="${_CC}" ; fi
+
+if [ "${CCACHE:-0}" -ge 1 ]; then
+    export CXX="ccache ${CXX}"
+    export CC="ccache ${CC}"
+
+    # ccache splits up the compile steps, so we end up with unused arguments in some steps.
+    # Clang also thinks that ccache isn't interactive, so we explicitly need to enable color.
+    if [ $(echo | ${CXX} -dM -E - | grep -c "#define __clang__ 1") -ge 1 ]; then
+        export CXX="${CXX} -Qunused-arguments -fcolor-diagnostics"
+        export CC="${CC} -Qunused-arguments -fcolor-diagnostics"
+    else
+        # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60304
+        # GCC normally throws this error which is in GTest, but *only* when compilation and
+        # preprocessing aren't combined in one step. However, when using ccache with GCC, we are
+        # running them in separate steps, so this warning/error is shown.
+        export CXX="${CXX} -Wno-conversion-null"
+        export CC="${CC} -Wno-conversion-null"
+    fi
+fi
+
+echo "export CXX=\"${CXX}\""
+echo "export CC=\"${CC}\""
+${CXX} --version
+
+# Ensure mason is on the PATH
+export PATH="`pwd`/.mason:${PATH}" MASON_DIR="`pwd`/.mason"
+
+# Start the mock X server
+if [ -f /etc/init.d/xvfb ] ; then
+    mapbox_time "start_xvfb" \
+    sh -e /etc/init.d/xvfb start
+    sleep 2 # sometimes, xvfb takes some time to start up
+fi
+
+# Make sure we're connecting to xvfb
+export DISPLAY=:99.0
+
+mapbox_time "checkout_mason" \
+git submodule update --init .mason
+
+# Install and set up to load a more recent version of mesa
+mapbox_time "install_mesa" \
+mason install mesa 10.4.3
+export LD_LIBRARY_PATH="`mason prefix mesa 10.4.3`/lib:${LD_LIBRARY_PATH:-}"
+
+# Install and set up to load awscli
+pip install --user awscli
+export PATH="`python -m site --user-base`/bin:${PATH}"
+
+# Install coveralls gem
+gem install coveralls-lcov --no-rdoc --no-ri