esp_http_client: remove dependency of esp_stubs from esp_http_client. Add esp_event stubs in `linux` component

components/esp_http_client/CMakeLists.txt

@@ -1,7 +1,7 @@
 if(NOT ${IDF_TARGET} STREQUAL "linux")
     set(req lwip esp_event)
 else()
-    set(req esp_stubs)
+    set(req linux)
 endif()
 
 idf_component_register(SRCS "esp_http_client.c"

components/linux/CMakeLists.txt

@@ -3,5 +3,6 @@ if(NOT "${target}" STREQUAL "linux")
     return()
 endif()
 
-idf_component_register(INCLUDE_DIRS include
+idf_component_register(SRCS esp_event_stubs.c
+                       INCLUDE_DIRS include ${IDF_PATH}/components/esp_event/include
                        REQUIRED_IDF_TARGETS linux)

components/linux/esp_event_stubs.c

@@ -0,0 +1,18 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include "esp_err.h"
+#include "esp_event.h"
+
+esp_err_t esp_event_loop_create_default(void)
+{
+    return ESP_OK;
+}
+
+esp_err_t esp_event_post(esp_event_base_t event_base, int32_t event_id,
+        const void* event_data, size_t event_data_size, TickType_t ticks_to_wait)
+{
+    return ESP_OK;
+}

examples/protocols/linux_stubs/esp_stubs/esp_stubs.c

@@ -10,17 +10,6 @@
 
 extern void app_main(void);
 
-esp_err_t esp_event_loop_create_default(void)
-{
-    return ESP_OK;
-}
-
-esp_err_t esp_event_post(esp_event_base_t event_base, int32_t event_id,
-        const void* event_data, size_t event_data_size, TickType_t ticks_to_wait)
-{
-    return ESP_OK;
-}
-
 esp_err_t esp_netif_init(void)
 {
     return ESP_OK;

examples/protocols/linux_stubs/esp_stubs/include/esp_event.h

@@ -5,13 +5,4 @@
  */
 #include "esp_err.h"
 
-typedef const char*  esp_event_base_t; /**< unique pointer to a subsystem that exposes events */
-typedef unsigned long TickType_t;
-
-#define ESP_EVENT_DECLARE_BASE(id) extern esp_event_base_t id
-#define ESP_EVENT_DEFINE_BASE(id) esp_event_base_t id = #id
-
 esp_err_t esp_event_loop_create_default(void);
-
-esp_err_t esp_event_post(esp_event_base_t event_base, int32_t event_id,
-        const void* event_data, size_t event_data_size, TickType_t ticks_to_wait);