feat: scaffold plain .html pages that need no server config

tests/test_quickstart.py

@@ -35,9 +35,15 @@ def test_the_settings_are_valid_python(tmp_path):
     )
     assert settings["SITENAME"] == "Signal Bars"
     assert settings["PLUGINS"] == ["pelican.plugins.mews"]
-    # The plugin only touches this suffix, so everything has to be saved under it.
-    assert settings["ARTICLE_SAVE_AS"].endswith(".xhtml")
-    assert settings["INDEX_SAVE_AS"].endswith(".xhtml")
+    # A site that is Mews throughout writes plain .html: servers send that as
+    # text/html (section 7.1) and index.html is the directory index everywhere.
+    # The suffix the plugin acts on has to agree with where pages are saved.
+    assert settings["MEWS_SUFFIX"] == ".html"
+    assert settings["ARTICLE_SAVE_AS"].endswith(".html")
+    assert settings["PAGE_SAVE_AS"].endswith(".html")
+    # Pelican falls back to its own HTML for any direct template the theme
+    # lacks, and with .html the plugin would choke on it.
+    assert settings["DIRECT_TEMPLATES"] == ["index"]
     assert settings["MARKDOWN"]["output_format"] == "xhtml"
 
 
@@ -62,11 +68,11 @@ def test_the_scaffolded_site_builds_conforming_pages(tmp_path):
         check=False,
     )
     assert built.returncode == 0, built.stderr
-    pages = sorted((site / "output").glob("*.xhtml"))
-    assert [p.name for p in pages] == ["first-post.xhtml", "index.xhtml"]
+    pages = sorted((site / "output").glob("*.html"))
+    assert [p.name for p in pages] == ["first-post.html", "index.html"]
     for page in pages:
         report = validate_file(str(page))
         assert report.conforms, "\n".join(str(f) for f in report.failures)
     # Section 6.1: the index has to be subscribable.
-    index = (site / "output" / "index.xhtml").read_text()
-    assert '<li><a href="first-post.xhtml">' in index
+    index = (site / "output" / "index.html").read_text()
+    assert '<li><a href="first-post.html">' in index