Build examples out-of-tree as part of CI process

.gitlab-ci.yml

@@ -69,6 +69,23 @@ build_ssc:
     - chmod +x gen_misc_ng.sh
     - ./gen_misc_ng.sh
 
+build_examples:
+  <<: *build_template
+  artifacts:
+    paths:
+      - build_examples/*/*/build/*.bin
+      - build_examples/*/*/build/*.elf
+      - build_examples/*/*/build/*.map
+      - build_examples/*/*/build/bootloader/*.bin
+    expire_in: 6 mos
+
+  script:
+    # it's not possible to build 100% out-of-tree and have the "artifacts"
+    # mechanism work, but this is the next best thing
+    - mkdir build_examples
+    - cd build_examples
+    - ${IDF_PATH}/make/build_examples.sh
+
 test_nvs_on_host:
   stage: test
   image: espressif/esp32-ci-env

examples/04_ble_adv/Makefile

@@ -13,3 +13,4 @@ sdkconfig: sdkconfig.defaults
 	$(Q) cp $< $@
 
 menuconfig: sdkconfig
+defconfig: sdkconfig

make/build_examples.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+#
+# Build all examples from the examples directory, out of tree to
+# ensure they can run when copied to a new directory.
+#
+# Runs as part of CI process.
+#
+# Assumes CWD is an out-of-tree build directory, and will copy examples to individual subdirectories, one by one.
+#
+[ -z ${IDF_PATH} ] && echo "IDF_PATH is not set" && exit 1
+
+EXAMPLE_NUM=1
+RESULT=0
+
+set -e
+
+for example in ${IDF_PATH}/examples/*; do
+	[ -f ${example}/Makefile ] || continue
+	echo "Building ${example} as ${EXAMPLE_NUM}..."
+	mkdir ${EXAMPLE_NUM}
+	cp -r ${example} ${EXAMPLE_NUM}
+	pushd ${EXAMPLE_NUM}/`basename ${example}`
+	# can't do "make defconfig all" as this will trip menuconfig
+	# sometimes
+	make defconfig && make || RESULT=$?
+	popd
+	EXAMPLE_NUM=$(( $EXAMPLE_NUM + 1 ))
+done
+
+exit $RESULT
+