Rework our travis config to be a bit more efficient, moving the work dir to a ramdisk, checking less stuff out of git, etc.

.travis.yml

@@ -1,4 +1,5 @@
 dist: focal
+arch: amd64
 language: c
 os:
   - linux
@@ -7,17 +8,22 @@ addons:
     packages:
       - shellcheck
       - cmake
+      - astyle
 env:
   global:
   - LC_ALL: C
-
+  - CCACHE_WRAPPER_PATH: /tmp/kaleidoscope-ccache
+  - ARDUINO_DOWNLOAD_URL: https://downloads.arduino.cc/arduino-1.8.13-linux64.tar.xz
 git:
   quiet: true
+  depth: false
 before_install: 
+  - sh .travis/setup-ramdisk.sh
   - ccache --set-config=compiler_check=content -M 1G -F 0
 
 install:
-  - git clone --depth 1 --recurse-submodules --shallow-submodules git://github.com/keyboardio/Kaleidoscope-Bundle-Keyboardio ../hardware/keyboardio
+  - cd $TRAVIS_BUILD_DIR
+  - git clone --depth 1 --recurse-submodules=build-tools --recurse-submodules=toolchain --recurse-submodules=avr/libraries/ --jobs 16 --shallow-submodules git://github.com/keyboardio/Kaleidoscope-Bundle-Keyboardio ../hardware/keyboardio
 ## We delete the Bundle's version of Kaleidoscope, and symlink ourselves in.
 ## This makes sure we're using the current version of the library.
   - rm -rf ../hardware/keyboardio/avr/libraries/Kaleidoscope
@@ -26,19 +32,19 @@ install:
   - export BOARD_HARDWARE_PATH=$TRAVIS_BUILD_DIR/../hardware
   - export ARDUINO_PATH=$TRAVIS_BUILD_DIR/arduino-1.8.13
   - make adjust-git-timestamps
-  - make travis-install-arduino 
+  - wget --quiet $ARDUINO_DOWNLOAD_URL -O - | tar xJf -
   - make prepare-ccache
 jobs:
   include:
-    - env: TEST_TARGET=smoke-sketches
-    - env: TEST_TARGET=travis-simulator-tests
-    - env: TEST_TARGET=cpplint
-    - env: TEST_TARGET=find-filename-conflicts 
-    - env: TEST_TARGET=shellcheck 
-    - env: TEST_TARGET=travis-check-astyle
+    - env: TEST_CMD="make -j 2 smoke-sketches"
+    - env: TEST_CMD="CCACHE_NOT_SUPPORTED=1 make travis-simulator-tests"
+    - env: TEST_CMD="make cpplint"
+    - env: TEST_CMD="make find-filename-conflicts"
+    - env: TEST_CMD="make shellcheck"
+    - env: TEST_CMD="make travis-check-astyle"
 script:
   - unset CC
-  - make -j 2 $TEST_TARGET 
+  - eval $TEST_CMD
 notifications:
   email:
     on_success: change

.travis/setup-ramdisk.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+
+export BLDDIR=/home/travis/build
+
+df -h
+du -sh $HOME
+du -sh $BLDDIR
+sudo mv $BLDDIR $BLDDIR.ori
+sudo mkdir -p $BLDDIR
+sudo mount -t tmpfs -o size=8192m tmps $BLDDIR
+time sudo cp -R $BLDDIR.ori/. $BLDDIR
+sudo chown -R travis:travis $BLDDIR
+df -h
+du -sh "$HOME"
+du -sh "$BLDDIR"