Attempt to update ESP32 CI build process

Manually implement the GH scripts that are now used in the ESP32 repo,
overriding the shared method we used to use between the 8266 and 32.

tests/common.sh

@@ -42,7 +42,7 @@ function build_sketches()
     local build_arg=$3
     local build_dir=build.tmp
     mkdir -p $build_dir
-    local build_cmd="python $arduino/$BUILD_PY -p $PWD/$build_dir $build_arg "
+    local build_cmd="python3 $arduino/$BUILD_PY -p $PWD/$build_dir $build_arg "
     local sketches=$(find $srcpath -name *.ino)
     print_size_info >size.log
     export ARDUINO_IDE_PATH=$arduino
@@ -92,7 +92,6 @@ function install_libraries()
 function install_ide()
 {
     local ide_path=$1
-    local core_path=$2
     wget -O arduino.tar.xz https://www.arduino.cc/download.php?f=/arduino-nightly-linux64.tar.xz
     tar xf arduino.tar.xz
     mv arduino-nightly $ide_path
@@ -103,7 +102,7 @@ function install_ide()
     pushd esp8266/tools
     git submodule init
     git submodule update
-    python get.py
+    python3 get.py
     export PATH="$ide_path:$ide_path/hardware/esp8266com/esp8266/tools/xtensa-lx106-elf/bin:$PATH"
     popd
     cd ..
@@ -113,7 +112,7 @@ function install_ide()
     pushd esp32/tools
     git submodule init
     git submodule update
-    python get.py
+    python3 get.py
     export PATH="$ide_path:$ide_path/hardware/espressif/esp32/tools/xtensa-esp32-elf/bin:$PATH"
     popd
 }
@@ -160,9 +159,21 @@ if [ "$BUILD_TYPE" = "build" ]; then
     install_arduino
     build_sketches_with_arduino
 elif [ "$BUILD_TYPE" = "build_esp32" ]; then
-    export BUILD_PY="hardware/espressif/esp32/tools/build.py -b esp32 -v -k  "
+    #export BUILD_PY="hardware/espressif/esp32/tools/build.py -b esp32 -v -k  "
+    #install_arduino
+    #build_sketches_with_arduino
+    sudo apt-get update
+    sudo apt-get upgrade -y python
+    sudo pip install --upgrade pip
+    sudo pip install --upgrade 'urllib3[secure]'
+    export ide_path=$HOME/arduino_ide 
     install_arduino
-    build_sketches_with_arduino
+    export FQBN="espressif:esp32:esp32:PSRAM=enabled,PartitionScheme=huge_app"
+    export GITHUB_WORKSPACE="$TRAVIS_BUILD_DIR"
+    export GITHUB_REPOSITORY="$TRAVIS_REPO_SLUG"
+    source $ide_path/hardware/espressif/esp32/.github/scripts/install-arduino-ide.sh
+    source $ide_path/hardware/espressif/esp32/.github/scripts/install-arduino-core-esp32.sh
+    build_sketches "$FQBN" "$HOME/Arduino/libraries" 0 1
 elif [ "$BUILD_TYPE" = "host_tests" ]; then
     # Run host side tests
     cd $TRAVIS_BUILD_DIR/tests