ci: multichip build support for examples

tools/ci/get_supported_examples.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+set -o errexit
+set -o pipefail
+set -o nounset
+
+DEBUG_SHELL=${DEBUG_SHELL:-"0"}
+[ "${DEBUG_SHELL}" = "1" ] && set -x
+
+if [[ $# < 1 ]]; then
+    echo "no target specified!" >&2
+    exit -1
+fi
+
+cd $IDF_PATH/examples
+ALL_EXAMPLES=$( find . -type f -name CMakeLists.txt | grep -v "/components/" | grep -v "/common_components/" | grep -v "/main/" | grep -v "/idf_as_lib/stubs/" | sed "s/\/CMakeLists.txt//g" | sort )
+EXAMPLE_LIST=$( realpath --relative-to=. $ALL_EXAMPLES )
+
+for EXAMPLE in $EXAMPLE_LIST
+do
+    SEARCHED=$( grep -E "SUPPORTED_TARGETS" $EXAMPLE/CMakeLists.txt | sed  "s/set\s*(\s*SUPPORTED_TARGETS//g" | sed "s/)//g" ) || true
+    if [[ $SEARCHED == "" ]]; then
+        #when SUPPORTED_TARGETS not set, allow all targets implicitly
+        echo "$EXAMPLE"
+    else
+        for TARGET in $SEARCHED
+        do
+            if [[ $TARGET == $1 ]]; then
+                echo "$EXAMPLE"
+                break
+            fi
+        done
+    fi
+done