Merge pull request #181 from Notenlish/main

add warning for pep 723

Author: pmp-p

src/pygbag/app.py

@@ -31,6 +31,7 @@
 from . import pack
 from . import web
 from .config_types import Config
+from .support.cross.aio.pep0723 import read_dependency_block_723
 
 
 from .config_to_object import load_config
@@ -87,6 +88,9 @@
 DEFAULT_WIDTH = 1280
 DEFAULT_HEIGHT = 720
 
+def warn(msg):
+    print(f"WARNING! {msg}")
+
 
 def set_args(program):
     global DEFAULT_SCRIPT
@@ -195,7 +199,25 @@ def make_cache_dirs():
 
 async def main_run(app_folder, mainscript, cdn=DEFAULT_CDN):
     global DEFAULT_PORT, DEFAULT_SCRIPT, APP_CACHE, required
-
+    
+    # Checks for existance of PEP 723 header on main.py https://peps.python.org/pep-0723/
+    main_file = Path(app_folder, mainscript)
+    with open(main_file, "r") as f:
+        src_code = f.read()
+        
+    has_pep723 = False
+    deps = {"pygame-ce"}
+    for dep in read_dependency_block_723(src_code):
+        has_pep723 = True
+        if dep == "pygame-ce":
+            pass
+        elif dep == "pygame":
+            warn("Pygbag uses pygame-ce for running on web. If you're using pygame, you should probably upgrade to pygame-ce, it is backwards compatible so your code will still work. If you're using pygame-ce already, specify 'pygame-ce' instead of 'pygame'.")
+        else:
+            deps.add(dep)
+    if not has_pep723:
+        warn("Couldn't find PEP 723 Header. See this: https://pygame-web.github.io/wiki/pygbag/#complex-packages")
+    
     DEFAULT_SCRIPT = mainscript or DEFAULT_SCRIPT
 
     build_dir, cache_dir = cache_check(app_folder, devmode)