Revert "Move version into global variable"

This reverts commit f1a5336.

Author: hoodmane

Tools/wasm/emscripten/__main__.py

@@ -22,7 +22,7 @@
 
 EMSCRIPTEN_DIR = Path(__file__).parent
 CHECKOUT = EMSCRIPTEN_DIR.parent.parent.parent
-EMSCRIPTEN_VERSION = "4.0.12"
+EMSCRIPTEN_VERSION_FILE = EMSCRIPTEN_DIR / "emscripten_version.txt"
 
 CROSS_BUILD_DIR = CHECKOUT / "cross-build"
 NATIVE_BUILD_DIR = CROSS_BUILD_DIR / "build"
@@ -37,21 +37,29 @@
 LOCAL_SETUP_MARKER = b"# Generated by Tools/wasm/emscripten.py\n"
 
 
+@functools.cache
+def get_required_emscripten_version():
+    """Read the required emscripten version from emscripten_version.txt."""
+    return EMSCRIPTEN_VERSION_FILE.read_text().strip()
+
+
 @functools.cache
 def get_emsdk_activate_path(emsdk_cache):
-    return Path(emsdk_cache) / EMSCRIPTEN_VERSION / "emsdk_env.sh"
+    required_version = get_required_emscripten_version()
+    return Path(emsdk_cache) / required_version / "emsdk_env.sh"
 
 
 def validate_emsdk_version(emsdk_cache):
     """Validate that the emsdk cache contains the required emscripten version."""
+    required_version = get_required_emscripten_version()
     emsdk_env = get_emsdk_activate_path(emsdk_cache)
     if not emsdk_env.is_file():
         print(
-            f"Required emscripten version {EMSCRIPTEN_VERSION} not found in {emsdk_cache}",
+            f"Required emscripten version {required_version} not found in {emsdk_cache}",
             file=sys.stderr,
         )
         sys.exit(1)
-    print(f"✅ Emscripten version {EMSCRIPTEN_VERSION} found in {emsdk_cache}")
+    print(f"✅ Emscripten version {required_version} found in {emsdk_cache}")
 
 
 def updated_env(updates, emsdk_cache):
@@ -420,11 +428,6 @@ def clean_contents(context):
                 print(f"🧹 Deleting generated {LOCAL_SETUP} ...")
 
 
-def print_emscripten_version(context):
-    """Print the required emscripten version."""
-    print(EMSCRIPTEN_VERSION)
-
-
 def main():
     default_host_runner = "node"
 
@@ -455,9 +458,6 @@ def main():
     clean = subcommands.add_parser(
         "clean", help="Delete files and directories created by this script"
     )
-    emscripten_version_cmd = subcommands.add_parser(
-        "emscripten-version", help="Print the required emscripten version"
-    )
     for subcommand in (
         build,
         configure_build,
@@ -467,7 +467,6 @@ def main():
         configure_host,
         make_host,
         clean,
-        emscripten_version_cmd,
     ):
         subcommand.add_argument(
             "--quiet",
@@ -521,7 +520,6 @@ def main():
         "make-host": make_emscripten_python,
         "build": build_all,
         "clean": clean_contents,
-        "emscripten-version": print_emscripten_version,
     }
 
     if not context.subcommand: