[esphome][ota][core] Compress OTA uploads on ESP32, RP2040, LibreTiny and host (#19037)

script/build_helpers.py

@@ -46,6 +46,8 @@ EXIT_SKIPPED = 1
 EXIT_COMPILE_ERROR = 2
 EXIT_CONFIG_ERROR = 3
 EXIT_NO_EXECUTABLE = 4
+# A test folder with this name would be synced into src/esphome and swept away with the core tree
+CORE_TREE_DIR = "esphome"
 
 # Name of the per-component YAML config file in benchmark directories
 BENCHMARK_YAML_FILENAME = "benchmark.yaml"
@@ -465,8 +467,19 @@ def build_and_run(
 
     components = sorted(components)
 
-    # Build include list: main entry point + component folders + extra dirs
-    includes: list[str] = [main_entry] + components
+    # Build include list: main entry point + component folders + extra dirs. The core tree
+    # folder is listed file by file, nested files included, since a folder include would
+    # land in src/esphome (see CORE_TREE_DIR)
+    includes: list[str] = [main_entry]
+    for component in components:
+        if component != CORE_TREE_DIR:
+            includes.append(component)
+            continue
+        includes.extend(
+            str(path.relative_to(tests_dir))
+            for path in sorted((tests_dir / component).rglob("*"))
+            if path.suffix in (".cpp", ".h")
+        )
     if extra_include_dirs:
         for d in extra_include_dirs:
             if d.is_dir() and (any(d.glob("*.cpp")) or any(d.glob("*.h"))):