Speed up the Travis build.

This does two major things:

1. It stores the arm gcc in the repo. The download from the PPA was taking between 2 and 7 minutes.
2. It splits each board into a separate job so they are built in parallel.

.gitattributes

@@ -11,6 +11,7 @@
 *.jpg binary
 *.dxf binary
 *.mpy binary
+*.deb binary
 
 # These should also not be modified by git.
 tests/basics/string_cr_conversion.py -text

.travis.yml

@@ -3,9 +3,18 @@ dist: trusty
 language: c
 compiler:
   - gcc
-cache:
-  directories:
-    - "${HOME}/persist"
+env:
+  - TRAVIS_BOARD=arduino_zero
+  - TRAVIS_BOARD=circuitplayground_express
+  - TRAVIS_BOARD=feather_m0_basic
+  - TRAVIS_BOARD=feather_m0_adalogger
+  - TRAVIS_BOARD=feather_m0_express
+  - TRAVIS_BOARD=metro_m0_express
+  - TRAVIS_BOARD=metro_m4_express
+  - TRAVIS_BOARD=trinket_m0
+  - TRAVIS_BOARD=gemma_m0
+  - TRAVIS_TEST=qemu
+  - TRAVIS_TEST=unix
 
 addons:
   artifacts:
@@ -30,17 +39,18 @@ notifications:
     on_error: always
 
 before_script:
-  - sudo add-apt-repository -y ppa:team-gcc-arm-embedded/ppa
   - sudo dpkg --add-architecture i386
-  - sudo apt-get update -qq || true
-  - sudo apt-get install -y python3 gcc-multilib pkg-config libffi-dev libffi-dev:i386 qemu-system gcc-mingw-w64
-  - sudo apt-get install -y --force-yes gcc-arm-embedded
+  - sudo apt-get install -y python3 gcc-multilib pkg-config libffi-dev libffi-dev:i386 qemu-system
+  - ([[ -z "$TRAVIS_TEST" ]] || sudo apt-get install -y qemu-system)
+  - ([[ -z "$TRAVIS_BOARD" ]] || (wget https://s3.amazonaws.com/adafruit-circuit-python/gcc-arm-embedded_6-2017q2-2~trusty1_amd64.deb && sudo dpkg -i gcc-arm-embedded*_amd64.deb))
+  - ([[ $TRAVIS_TEST != "qemu" ]] || (wget https://s3.amazonaws.com/adafruit-circuit-python/gcc-arm-embedded_6-2017q2-2~trusty1_amd64.deb && sudo dpkg -i gcc-arm-embedded*_amd64.deb))
+
   # For teensy build
   - sudo apt-get install realpath
   # For coverage testing (upgrade is used to get latest urllib3 version)
   - sudo pip install --upgrade cpp-coveralls
   - gcc --version
-  - arm-none-eabi-gcc --version
+  - ([[ -z "$TRAVIS_BOARD" ]] || arm-none-eabi-gcc --version)
   - python3 --version
 
 script:
@@ -48,21 +58,19 @@ script:
   - echo 'Building mpy-cross' && echo -en 'travis_fold:start:mpy-cross\\r'
   - make -C mpy-cross
   - echo -en 'travis_fold:end:mpy-cross\\r'
+
   - echo 'Building Adafruit binaries' && echo -en 'travis_fold:start:adafruit-bins\\r'
-  - tools/build_adafruit_bins.sh
+  - ([[ -z "$TRAVIS_BOARD" ]] || tools/build_adafruit_bins.sh)
   - echo -en 'travis_fold:end:adafruit-bins\\r'
-  - make -C ports/minimal CROSS=1 build/firmware.bin
-  - ls -l ports/minimal/build/firmware.bin
-  #- mkdir -p ${HOME}/persist
-  # Save new firmware for reference, but only if building a main branch, not a pull request
-  #- 'if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then cp ports/minimal/build/firmware.bin ${HOME}/persist/; fi'
+
   - echo 'Building unix' && echo -en 'travis_fold:start:unix\\r'
-  - make -C ports/unix deplibs
-  - make -C ports/unix
-  - make -C ports/unix coverage
+  - ([[ $TRAVIS_TEST != "unix" ]] || make -C ports/unix deplibs)
+  - ([[ $TRAVIS_TEST != "unix" ]] || make -C ports/unix)
+  - ([[ $TRAVIS_TEST != "unix" ]] || make -C ports/unix coverage)
   - echo -en 'travis_fold:end:unix\\r'
+
   - echo 'Building qemu' && echo -en 'travis_fold:start:qemu\\r'
-  - make -C ports/qemu-arm test
+  - ([[ $TRAVIS_TEST != "qemu" ]] || make -C ports/qemu-arm test)
   - echo -en 'travis_fold:end:qemu\\r'
 
   # run tests without coverage info
@@ -71,16 +79,19 @@ script:
 
   # run tests with coverage info
   - echo 'Test all' && echo -en 'travis_fold:start:test_all\\r'
-  - (cd tests && MICROPY_CPYTHON3=python3.4 MICROPY_MICROPYTHON=../ports/unix/micropython_coverage ./run-tests)
+  - ([[ $TRAVIS_TEST != "unix" ]] || (cd tests && MICROPY_CPYTHON3=python3.4 MICROPY_MICROPYTHON=../ports/unix/micropython_coverage ./run-tests))
   - echo -en 'travis_fold:end:test_all\\r'
+
   - echo 'Test threads' && echo -en 'travis_fold:start:test_threads\\r'
-  - (cd tests && MICROPY_CPYTHON3=python3.4 MICROPY_MICROPYTHON=../ports/unix/micropython_coverage ./run-tests -d thread)
+  - ([[ $TRAVIS_TEST != "unix" ]] || (cd tests && MICROPY_CPYTHON3=python3.4 MICROPY_MICROPYTHON=../ports/unix/micropython_coverage ./run-tests -d thread))
   - echo -en 'travis_fold:end:test_threads\\r'
+
   - echo 'Testing with native' && echo -en 'travis_fold:start:test_native\\r'
-  - (cd tests && MICROPY_CPYTHON3=python3.4 MICROPY_MICROPYTHON=../ports/unix/micropython_coverage ./run-tests --emit native)
+  - ([[ $TRAVIS_TEST != "unix" ]] || (cd tests && MICROPY_CPYTHON3=python3.4 MICROPY_MICROPYTHON=../ports/unix/micropython_coverage ./run-tests --emit native))
   - echo -en 'travis_fold:end:test_native\\r'
-  - echo 'Testing with mpy' && echo -en 'travis_fold:start:test_mpy\\r'
-  - (cd tests && MICROPY_CPYTHON3=python3.4 MICROPY_MICROPYTHON=../ports/unix/micropython_coverage ./run-tests --via-mpy -d basics float)
+
+  - (echo 'Testing with mpy' && echo -en 'travis_fold:start:test_mpy\\r')
+  - ([[ $TRAVIS_TEST != "unix" ]] || (cd tests && MICROPY_CPYTHON3=python3.4 MICROPY_MICROPYTHON=../ports/unix/micropython_coverage ./run-tests --via-mpy -d basics float))
   - echo -en 'travis_fold:end:test_mpy\\r'
 
   # run coveralls coverage analysis (try to, even if some builds/tests failed)

tools/build_adafruit_bins.sh

@@ -9,7 +9,13 @@ if [ "$TRAVIS" == "true" ]; then
     PARALLEL="-j 2"
 fi
 
-for board in $ATMEL_BOARDS; do
+if [ -z "$TRAVIS_BOARD" ]; then
+    boards=$ATMEL_BOARDS
+else
+    boards=$TRAVIS_BOARD
+fi
+
+for board in $boards; do
     make $PARALLEL -C ports/atmel-samd BOARD=$board
     (( exit_status = exit_status || $? ))
 done
@@ -32,7 +38,7 @@ if [ "$TRAVIS" == "true" ]; then
     fi
 fi
 
-for board in $ATMEL_BOARDS; do
+for board in $boards; do
     mkdir -p bin/$board/
     cp ports/atmel-samd/build-$board/firmware.bin bin/$board/adafruit-circuitpython-$board-$version.bin
     (( exit_status = exit_status || $? ))