test new esp32-arduino-lib-builder packages

scripts/enable_ccache.py

@@ -0,0 +1,27 @@
+# Wrap the C/C++ compilers with ccache when it is on PATH.
+# No-op locally unless ccache is installed; CI installs it via ccache-action.
+Import("env")
+
+import shutil
+
+ccache = shutil.which("ccache")
+if ccache:
+
+    def wrap(tool):
+        cmd = env.get(tool)
+        if not cmd:
+            return
+        resolved = env.subst(cmd) if isinstance(cmd, str) else cmd
+        if isinstance(resolved, str):
+            if resolved.startswith("ccache"):
+                return
+            env[tool] = f"{ccache} {resolved}"
+            return
+        if isinstance(resolved, (list, tuple)):
+            if resolved and "ccache" in str(resolved[0]):
+                return
+            env[tool] = [ccache, *resolved]
+
+    wrap("CC")
+    wrap("CXX")
+    print("ccache enabled")