gh-146197: Run -m test.pythoninfo on the Emscripten CI (#146332)

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

.github/workflows/reusable-emscripten.yml

@@ -68,5 +68,7 @@ jobs:
       run: python3 Platforms/emscripten configure-host --host-runner node -- --config-cache
     - name: "Make host Python"
       run: python3 Platforms/emscripten make-host
+    - name: "Display build info"
+      run: python3 Platforms/emscripten run --pythoninfo
     - name: "Test"
       run: python3 Platforms/emscripten run --test

Platforms/emscripten/__main__.py

@@ -591,6 +591,8 @@ def run_emscripten_python(context):
 
     if context.test:
         args = load_config_toml()["test-args"] + args
+    elif context.pythoninfo:
+        args = load_config_toml()["pythoninfo-args"] + args
 
     os.execv(str(exec_script), [str(exec_script), *args])
 
@@ -722,10 +724,16 @@ def main():
         action="store_true",
         default=False,
         help=(
-            "If passed, will add the default test arguments to the beginning of the command. "
+            "Add the default test arguments to the beginning of the command. "
             "Default arguments loaded from Platforms/emscripten/config.toml"
         ),
     )
+    run.add_argument(
+        "--pythoninfo",
+        action="store_true",
+        default=False,
+        help="Run -m test.pythoninfo",
+    )
     run.add_argument(
         "args",
         nargs=argparse.REMAINDER,

Platforms/emscripten/config.toml

@@ -11,6 +11,9 @@ test-args = [
     "--single-process",
     "-W",
 ]
+pythoninfo-args = [
+    "-m", "test.pythoninfo",
+]
 
 [dependencies.libffi]
 url = "https://github.com/libffi/libffi/releases/download/v{version}/libffi-{version}.tar.gz"