Publish firmware artifacts after build

README.md

@@ -106,7 +106,8 @@ Prereqs: Pico SDK + CMake toolchain set up.
 ### Using `build.py`
 
 `build.py` configures CMake, builds the firmware, checks that both output formats
-were created, and flashes the ELF with `picotool`.
+were created, copies the release artifacts into `firmware/`, and flashes the ELF
+with `picotool`.
 
 Before running it:
 
@@ -122,6 +123,8 @@ The generated files are:
 
 - `build/switch-pico.elf`, which `build.py` passes to `picotool`.
 - `build/switch-pico.uf2`, which can also be copied to the Pico manually.
+- `firmware/switch-pico.elf` and `firmware/switch-pico.uf2`, refreshed from the
+  corresponding `build/` artifacts after every successful build.
 
 To customize the controller grip color while building, pass one of these mutually
 exclusive options:

build.py

@@ -12,6 +12,9 @@ from pathlib import Path
 SCRIPT_DIR = Path(__file__).resolve().parent
 CONFIG_FILE = SCRIPT_DIR / "controller_color_config.h"
 BUILD_DIR = SCRIPT_DIR / "build"
+FIRMWARE_DIR = SCRIPT_DIR / "firmware"
+FIRMWARE_ELF_PATH = FIRMWARE_DIR / "switch-pico.elf"
+FIRMWARE_UF2_PATH = FIRMWARE_DIR / "switch-pico.uf2"
 
 ELF_PATH = Path(os.environ.get("ELF_PATH", BUILD_DIR / "switch-pico.elf")).expanduser()
 UF2_PATH = Path(os.environ.get("UF2_PATH", BUILD_DIR / "switch-pico.uf2")).expanduser()
@@ -126,9 +129,14 @@ def build():
         missing = ", ".join(str(path) for path in missing_artifacts)
         sys.stderr.write(f"Error: Build did not produce required artifact(s): {missing}\n")
         sys.exit(1)
+    FIRMWARE_DIR.mkdir(parents=True, exist_ok=True)
+    shutil.copy2(ELF_PATH, FIRMWARE_ELF_PATH)
+    shutil.copy2(UF2_PATH, FIRMWARE_UF2_PATH)
 
     print(f"Built ELF: {ELF_PATH}")
     print(f"Built UF2: {UF2_PATH}")
+    print(f"Copied ELF: {FIRMWARE_ELF_PATH}")
+    print(f"Copied UF2: {FIRMWARE_UF2_PATH}")
 
 def flash():
     picotool = resolve_picotool()