Travis: Work around 4MB log limit when building all examples

.travis.yml

@@ -8,6 +8,8 @@ env:
   ESPTOOL2_COMMIT=ec0e2c7
   ESPTOOL2_DIR="${HOME}/esptool2-${ESPTOOL2_COMMIT}"
   PATH=${PATH}:${CROSS_BINDIR}:${ESPTOOL2_DIR}
+  CROSS="ccache xtensa-lx106-elf-"
+  MAKE_CMD="make WARNINGS_AS_ERRORS=1 -C examples/ build-examples"
 cache:
   directories:
     - ${CROSS_ROOT}
@@ -35,27 +37,12 @@ addons:
     - git
 
 before_install:
-  # Install a toolchain using esp-open-sdk (parts we need for this are the GNU toolchain and libhal)
-  #
-  # Adds hack of "{$HAS_TC} || -Buildstep-" to avoid rebuilding toolchain if it's already
-  # installed from the cache. If this gets any more complex it should be spun out to a standalone shell script.
-  - export HAS_TC="test -d ${CROSS_BINDIR}"
-  - unset CC # Travis sets this due to "language: c", but it confuses autotools configure when cross-building
-  - ${HAS_TC} || git clone --recursive https://github.com/pfalcon/esp-open-sdk.git
-  - ${HAS_TC} || cd esp-open-sdk
-  - ${HAS_TC} || git reset --hard ${OPENSDK_COMMIT}
-  - ${HAS_TC} || git submodule update
-  - ${HAS_TC} || sed -i "s/2.69/2.68/" lx106-hal/configure.ac # this is a nasty hack as Ubuntu Precise only has autoconf 2.68 not 2.69...
-  - ${HAS_TC} || sed -r -i 's%TOOLCHAIN ?=.*%TOOLCHAIN=${CROSS_ROOT}%' Makefile
-  - ${HAS_TC} || make toolchain esptool libhal STANDALONE=n
-  - export HAS_ET2="test -f ${ESPTOOL2_DIR}/esptool2"
-  - ${HAS_ET2} || git clone https://github.com/raburton/esptool2 ${ESPTOOL2_DIR}
-  - ${HAS_ET2} || cd ${ESPTOOL2_DIR}
-  - ${HAS_ET2} || git reset --hard ${ESPTOOL2_COMMIT}
-  - ${HAS_ET2} || make
+  - utils/travis_build/install_esptool2.sh
+  - travis_wait 30 utils/travis_build/install_toolchain.sh
 
 script:
   - cd ${TRAVIS_BUILD_DIR}
   # Remove ssid_config requirement for examples
   - sed -i "s%#error%//#error%" include/ssid_config.h
-  - make WARNINGS_AS_ERRORS=1 -C examples/ build-examples CROSS="ccache xtensa-lx106-elf-" V=1
+  # Don't verbose-build all examples (too much output), only verbose-build errors
+  - ( ${MAKE_CMD} ) || ( ${MAKE_CMD} V=1 )