change(examples): switch examples to use a minimal build

Currently, several example dependencies rely on the fact that all
registered components are added to the build, along with components
specified in common requirements. This results in longer build times
because even unused components must be built. Switch all examples to use
idf_minimal_build to compile only the components actually required by
the example.

Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>

examples/protocols/mqtt/custom_outbox/CMakeLists.txt

@@ -3,6 +3,8 @@
 cmake_minimum_required(VERSION 3.16)
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+# "Trim" the build. Include the minimal set of components, main, and anything it depends on.
+idf_build_set_property(MINIMAL_BUILD ON)
 project(mqtt_tcp_custom_outbox)
 
 # Add custom outbox implementation to mqtt component

examples/protocols/mqtt/ssl/CMakeLists.txt

@@ -4,6 +4,8 @@ cmake_minimum_required(VERSION 3.16)
 
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+# "Trim" the build. Include the minimal set of components, main, and anything it depends on.
+idf_build_set_property(MINIMAL_BUILD ON)
 project(mqtt_ssl)
 
 target_add_binary_data(mqtt_ssl.elf "main/mqtt_eclipseprojects_io.pem" TEXT)

examples/protocols/mqtt/ssl_ds/CMakeLists.txt

@@ -4,6 +4,8 @@ cmake_minimum_required(VERSION 3.16)
 
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+# "Trim" the build. Include the minimal set of components, main, and anything it depends on.
+idf_build_set_property(MINIMAL_BUILD ON)
 project(mqtt_ssl_ds)
 
 # Flash the custom partition named `esp_secure_cert`.

examples/protocols/mqtt/ssl_mutual_auth/CMakeLists.txt

@@ -4,6 +4,8 @@ cmake_minimum_required(VERSION 3.16)
 
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+# "Trim" the build. Include the minimal set of components, main, and anything it depends on.
+idf_build_set_property(MINIMAL_BUILD ON)
 project(mqtt_ssl_mutual_auth)
 
 target_add_binary_data(${CMAKE_PROJECT_NAME}.elf "main/client.crt" TEXT)

examples/protocols/mqtt/ssl_psk/CMakeLists.txt

@@ -4,4 +4,6 @@ cmake_minimum_required(VERSION 3.16)
 
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+# "Trim" the build. Include the minimal set of components, main, and anything it depends on.
+idf_build_set_property(MINIMAL_BUILD ON)
 project(mqtt_ssl_psk)

examples/protocols/mqtt/tcp/CMakeLists.txt

@@ -4,4 +4,6 @@ cmake_minimum_required(VERSION 3.16)
 
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+# "Trim" the build. Include the minimal set of components, main, and anything it depends on.
+idf_build_set_property(MINIMAL_BUILD ON)
 project(mqtt_tcp)

examples/protocols/mqtt/ws/CMakeLists.txt

@@ -4,4 +4,6 @@ cmake_minimum_required(VERSION 3.16)
 
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+# "Trim" the build. Include the minimal set of components, main, and anything it depends on.
+idf_build_set_property(MINIMAL_BUILD ON)
 project(mqtt_websocket)

examples/protocols/mqtt/wss/CMakeLists.txt

@@ -4,6 +4,8 @@ cmake_minimum_required(VERSION 3.16)
 
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+# "Trim" the build. Include the minimal set of components, main, and anything it depends on.
+idf_build_set_property(MINIMAL_BUILD ON)
 project(mqtt_websocket_secure)
 
 target_add_binary_data(mqtt_websocket_secure.elf "main/mqtt_eclipseprojects_io.pem" TEXT)

examples/protocols/mqtt5/CMakeLists.txt

@@ -4,4 +4,6 @@ cmake_minimum_required(VERSION 3.16)
 
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+# "Trim" the build. Include the minimal set of components, main, and anything it depends on.
+idf_build_set_property(MINIMAL_BUILD ON)
 project(mqtt5)