Add webapp autocompile

.gitignore

@@ -7,4 +7,5 @@
 platformio-device-monitor*.log
 logs/device-monitor*.log
 platformio_override.ini
+webapp_dist/
 .DS_Store

pio-scripts/compile_webapp.py

@@ -0,0 +1,65 @@
+import os
+import hashlib
+import pickle
+import subprocess
+
+def check_files(directories, filepaths, hash_file):
+    old_file_hashes = {}
+    file_hashes = {}
+
+    for directory in directories:
+        for root, dirs, filenames in os.walk(directory):
+            for file in filenames:
+                filepaths.append(os.path.join(root, file))
+
+    for file_path in filepaths:
+        with open(file_path, 'rb') as f:
+            file_data = f.read()
+        file_hashes[file_path] = hashlib.md5(file_data).hexdigest()
+
+    if os.path.exists(hash_file):
+        with open(hash_file, 'rb') as f:
+            old_file_hashes = pickle.load(f)
+
+    update = False
+    for file_path, file_hash in file_hashes.items():
+        if file_path not in old_file_hashes or old_file_hashes[file_path] != file_hash:
+            update = True
+            break
+
+    if not update:
+        print("webapp artifacts should be up-to-date")
+        return
+
+    print("compiling webapp (hang on, this can take a while and there might be little output)...")
+
+    try:
+        # if these commands fail, an exception will prevent us from
+        # persisting the current hashes => commands will be executed again
+        subprocess.run(["yarn", "--cwd", "webapp", "install", "--frozen-lockfile"],
+                       check=True)
+
+        subprocess.run(["yarn", "--cwd", "webapp", "build"], check=True)
+
+    except FileNotFoundError:
+        raise Exception("it seems 'yarn' is not installed/available on your system")
+
+    with open(hash_file, 'wb') as f:
+        pickle.dump(file_hashes, f)
+
+def main():
+    if os.getenv('GITHUB_ACTIONS') == 'true':
+        print("INFO: not testing for up-to-date webapp artifacts when running as Github action")
+        return 0
+
+    print("INFO: testing for up-to-date webapp artifacts")
+
+    directories = ["webapp/src/", "webapp/public/"]
+    files = ["webapp/index.html", "webapp/tsconfig.config.json",
+             "webapp/tsconfig.json", "webapp/vite.config.ts",
+             "webapp/yarn.lock"]
+    hash_file = "webapp_dist/.hashes.pkl"
+
+    check_files(directories, files, hash_file)
+
+main()

platformio.ini

@@ -50,6 +50,7 @@ lib_deps =
     plerup/EspSoftwareSerial @ ^8.2.0
 
 extra_scripts =
+    pre:pio-scripts/compile_webapp.py
     pre:pio-scripts/auto_firmware_version.py
     pre:pio-scripts/patch_apply.py
     post:pio-scripts/create_factory_bin.py