lib: attempt to speed-up builds by removing unneeded files in extraSc…

…ript

sdk/lib/lilka/library.json

@@ -1,6 +1,6 @@
 {
     "name": "Lilka",
-    "version": "1.1.4",
+    "version": "1.1.5",
     "license": "MIT",
     "repository": {
         "type": "git",
@@ -24,6 +24,10 @@
     "include": [
         "src",
         "examples",
-        "README.md"
-    ]
+        "README.md",
+        "prepare.py"
+    ],
+    "build": {
+        "extraScript": "prepare.py"
+    }
 }

sdk/lib/lilka/prepare.py

@@ -0,0 +1,83 @@
+"""
+This script removes some files from the libraries that Lilka uses, specifically:
+  - GFX library code that is not used by the ST7789 display and ESP32 SPI interface
+  - U8g2 display code (we only use the U8g2lib library for the font data)
+
+This really speeds up the build process, but I'm not sure if it won't break in the future.
+Але, як то кажуть - "це працює на моїй машині" ;)
+"""
+import os
+import re
+import shutil
+import sys
+from pathlib import Path
+from itertools import chain
+
+Import("env")
+
+keep = ["Arduino_ESP32SPI", "Arduino_ST7789"]
+
+try:
+    lib_dir = Path(os.path.join(env.get("PROJECT_LIBDEPS_DIR"), env.get("PIOENV")))
+    for lib in lib_dir.glob("*"):
+        modified_count = 0
+        deleted_count = 0
+        if lib.name == "GFX Library for Arduino":
+            # Remote all files in the GFX library that are not used by the ST7789 display and ESP32 SPI interface
+
+            # Delete all files in the databus folder that don't match the pattern "Arduino_ESP32SPI.(c|h)"
+            databus_dir = lib / "src" / "databus"
+            for f in chain(databus_dir.glob("*.cpp"), databus_dir.glob("*.h")):
+                if f.stem not in keep:
+                    # print("Deleting {}".format(f.name))
+                    f.unlink()
+                    deleted_count += 1
+            display_dir = lib / "src" / "display"
+            for f in chain(display_dir.glob("*.cpp"), display_dir.glob("*.h")):
+                if f.stem not in keep:
+                    # print("Deleting {}".format(f.name))
+                    f.unlink()
+                    deleted_count += 1
+
+            # Remove Arduino_GFX_Library.cpp because it includes some of the files we just deleted
+            main_cpp = lib / "src" / "Arduino_GFX_Library.cpp"
+            if main_cpp.exists():
+                main_cpp.unlink()
+                deleted_count += 1
+
+            # Cleanup includes
+            main_h = lib / "src" / "Arduino_GFX_Library.h"
+            text = main_h.read_text()
+            lines = text.splitlines()
+            lines = [
+                line
+                for line in lines
+                if not (
+                    line.startswith("#include")
+                    and ("databus/" in line or "display/" in line)
+                    and not any([k + ".h" in line for k in keep])
+                )
+            ]
+            new_text = "\n".join(lines)
+            if text != new_text:
+                main_h.write_text(new_text)
+                modified_count += 1
+        if lib.name == "U8g2":
+            # Remove all display code
+            clib_dir = lib / "src" / "clib"
+            for f in clib_dir.glob("u8x8*.c"):
+                # print("Deleting {}".format(f.name))
+                f.unlink()
+                deleted_count += 1
+        if modified_count + deleted_count > 0:
+            print(
+                '  * Cleanup "{}": deleted {}, modified {}'.format(
+                    lib.name, deleted_count, modified_count
+                )
+            )
+
+except Exception as e:
+    # Get exception line number
+    tb = sys.exc_info()[2]
+    print("  * Error in Lilka prepare.py script, line {}: {}".format(tb.tb_lineno, e))
+    print("  * This is just a warning about failed cleanup. The build will continue.")