feat: minify CSS in lektor server if NODE_ENV=production (#5)

lektor_tailwind.py

@@ -39,17 +39,19 @@ def init_tailwindcss(self):
     def _run_watcher(self, output_path: str):
         if not self.input_exists():
             return
-        self.tailwind = subprocess.Popen(
-            [
-                self.tailwind_bin,
-                "-i",
-                self.input_css,
-                "-o",
-                os.path.join(output_path, self.css_path),
-                "-w",
-            ],
-            cwd=self.env.root_path,
-        )
+
+        cmd = [
+            self.tailwind_bin,
+            "--input",
+            self.input_css,
+            "--output",
+            os.path.join(output_path, self.css_path),
+            "--watch",
+        ]
+        if os.environ.get("NODE_ENV") == "production":
+            cmd.append("--minify")
+
+        self.tailwind = subprocess.Popen(cmd, cwd=self.env.root_path)
 
     def input_exists(self) -> bool:
         return os.path.exists(self.input_css)

tests/test_plugin.py

@@ -163,7 +163,13 @@ def _communicate1(self, timeout):
 
 
 @pytest.fixture
-def lektor_server(tmp_project_path):
+def node_env():
+    return "development"
+
+
+@pytest.fixture
+def lektor_server(tmp_project_path, node_env, monkeypatch):
+    monkeypatch.setenv("NODE_ENV", node_env)
     with LektorServerFixture() as fixture:
         yield fixture
 
@@ -202,3 +208,11 @@ def test_server_rebuilds_css_when_input_css_updated(
     lektor_server.wait_for_build()
     assert ".SENTINEL" in output_css_path.read_text()
     assert ".flex" in output_css_path.read_text()
+
+
+@pytest.mark.parametrize("node_env", ["production"])
+def test_server_build_minified(lektor_server, output_css_path, node_env):
+    lektor_server.wait_for_build()
+    assert ".flex" in output_css_path.read_text()
+    lines_of_css = len(output_css_path.read_text().splitlines())
+    assert lines_of_css == 1