display which theme is the default one in basic output

CHANGELOG.md

@@ -34,6 +34,7 @@
 - Relax syntax mapping rule restrictions to allow brace expansion #2865 (@cyqsimon)
 - Apply clippy fixes #2864 (@cyqsimon)
 - Faster startup by offloading glob matcher building to a worker thread #2868 (@cyqsimon)
+- Display which theme is the default one in basic output (no colors), see #2937 (@sblondon)
 - Display which theme is the default one in colored output, see #2838 (@sblondon)
 
 ## Syntaxes

src/bin/bat/main.rs

@@ -200,8 +200,8 @@ pub fn list_themes(cfg: &Config, config_dir: &Path, cache_dir: &Path) -> Result<
     let stdout = io::stdout();
     let mut stdout = stdout.lock();
 
+    let default_theme = HighlightingAssets::default_theme();
     if config.colored_output {
-        let default_theme = HighlightingAssets::default_theme();
         for theme in assets.themes() {
             let default_theme_info = if default_theme == theme {
                 " (default)"
@@ -230,7 +230,12 @@ pub fn list_themes(cfg: &Config, config_dir: &Path, cache_dir: &Path) -> Result<
         )?;
     } else {
         for theme in assets.themes() {
-            writeln!(stdout, "{theme}")?;
+            let default_theme_info = if default_theme == theme {
+                " (default)"
+            } else {
+                ""
+            };
+            writeln!(stdout, "{theme}{default_theme_info}")?;
         }
     }
 

tests/integration_tests.rs

@@ -273,7 +273,7 @@ fn squeeze_limit_line_numbers() {
 }
 
 #[test]
-fn list_themes() {
+fn list_themes_with_colors() {
     #[cfg(target_os = "macos")]
     let default_theme_chunk = "Monokai Extended Light\x1B[0m (default)";
 
@@ -290,6 +290,23 @@ fn list_themes() {
         .stdout(predicate::str::contains("Output the square of a number.").normalize());
 }
 
+#[test]
+fn list_themes_without_colors() {
+    #[cfg(target_os = "macos")]
+    let default_theme_chunk = "Monokai Extended Light (default)";
+
+    #[cfg(not(target_os = "macos"))]
+    let default_theme_chunk = "Monokai Extended (default)";
+
+    bat()
+        .arg("--color=never")
+        .arg("--list-themes")
+        .assert()
+        .success()
+        .stdout(predicate::str::contains("DarkNeon").normalize())
+        .stdout(predicate::str::contains(default_theme_chunk).normalize());
+}
+
 #[test]
 #[cfg_attr(any(not(feature = "git"), target_os = "windows"), ignore)]
 fn short_help() {