Add a ci check for building w/ component

Author: noahp

.github/workflows/ci.yml

@@ -11,12 +11,12 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     container:
-      image: espressif/idf:release-v5.0
+      image: espressif/idf:release-v5.3
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: recursive
 
@@ -28,7 +28,32 @@ jobs:
           idf.py build
 
       - name: Archive release
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: elf
           path: build/*.elf.memfault_log_fmt
+
+  build-with-component:
+    runs-on: ubuntu-latest
+    container:
+      image: espressif/idf:release-v5.3
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build
+        run: |
+          # set a phony project key
+          echo "CONFIG_MEMFAULT_PROJECT_KEY=\"1234\"" >> sdkconfig.defaults
+          . ${IDF_PATH}/export.sh
+
+          # add the Memfaut component
+          idf.py add-dependency "memfault/memfault-firmware-sdk^1.15.0"
+
+          MEMFAULT_SDK_COMPONENT=1 idf.py build
+
+      - name: Archive release
+        uses: actions/upload-artifact@v4
+        with:
+          name: elf.component
+          path: build/*.elf.memfault_log_fmt

CMakeLists.txt

@@ -15,13 +15,17 @@ if(DEFINED IDF_VERSION_MAJOR)
   endif()
 endif()
 
-# Look for the Memfault SDK in a subdirectory first, when this app is used
-# standalone (not from within the Memfault SDK)
-get_filename_component(memfault_firmware_sdk_dir third-party/memfault-firmware-sdk ABSOLUTE)
-if(NOT EXISTS ${memfault_firmware_sdk_dir})
-get_filename_component(memfault_firmware_sdk_dir ../../../../ ABSOLUTE)
+# Pull in the Memfault SDK if we're not building as a component, indicated by
+# the absence of the MEMFAULT_SDK_COMPONENT env var.
+if(NOT DEFINED ENV{MEMFAULT_SDK_COMPONENT})
+  # Look for the Memfault SDK in a subdirectory first, when this app is used
+  # standalone (not from within the Memfault SDK)
+  get_filename_component(memfault_firmware_sdk_dir third-party/memfault-firmware-sdk ABSOLUTE)
+  if(NOT EXISTS ${memfault_firmware_sdk_dir})
+    get_filename_component(memfault_firmware_sdk_dir ../../../../ ABSOLUTE)
+  endif()
+  include(${memfault_firmware_sdk_dir}/ports/esp_idf/memfault.cmake)
 endif()
-include(${memfault_firmware_sdk_dir}/ports/esp_idf/memfault.cmake)
 
 # NOTE: This include also applies global compiler options, make sure
 # this happens first before defining other targets!