Add an even simple example

examples/cat.rs

@@ -0,0 +1,34 @@
+/// A very simple colorized `cat` clone, using `bat` as a library.
+/// See `src/bin/bat` for the full `bat` application.
+
+use bat::{
+    config::{Config, InputFile, StyleComponent, StyleComponents},
+    Controller, HighlightingAssets,
+};
+use console::Term;
+use std::process;
+
+fn main() {
+    let files = std::env::args_os().skip(1).collect::<Vec<_>>();
+
+    if files.is_empty() {
+        eprintln!("No input files specified");
+        process::exit(1);
+    }
+
+    let config = Config {
+        term_width: Term::stdout().size().1 as usize,
+        colored_output: true,
+        true_color: true,
+        style_components: StyleComponents::new(&[
+            StyleComponent::Header,
+            StyleComponent::Grid,
+            StyleComponent::Numbers,
+        ]),
+        files: files.iter().map(|file| InputFile::Ordinary(file)).collect(),
+        ..Default::default()
+    };
+    let assets = HighlightingAssets::from_binary();
+
+    Controller::new(&config, &assets).run().expect("no errors");
+}

examples/simple.rs

@@ -1,29 +1,18 @@
+/// A simple program that prints its own source code using the bat library
+
 use bat::{
-    config::{Config, InputFile, StyleComponent, StyleComponents},
+    config::{Config, InputFile},
     Controller, HighlightingAssets,
 };
-use console::Term;
-use std::process;
+use std::ffi::OsStr;
 
 fn main() {
-    let files = std::env::args_os().skip(1).collect::<Vec<_>>();
-
-    if files.is_empty() {
-        eprintln!("No input files specified");
-        process::exit(1);
-    }
+    let path_to_this_file = OsStr::new(file!());
 
     let config = Config {
-        term_width: Term::stdout().size().1 as usize,
+        files: vec![InputFile::Ordinary(path_to_this_file)],
         colored_output: true,
         true_color: true,
-        style_components: StyleComponents::new(&[
-            StyleComponent::Header,
-            StyleComponent::Grid,
-            StyleComponent::Numbers,
-        ]),
-        files: files.iter().map(|file| InputFile::Ordinary(file)).collect(),
-        theme: "1337".into(),
         ..Default::default()
     };
     let assets = HighlightingAssets::from_binary();

src/assets.rs

@@ -160,12 +160,14 @@ impl HighlightingAssets {
         match self.theme_set.themes.get(theme) {
             Some(theme) => theme,
             None => {
-                use ansi_term::Colour::Yellow;
-                eprintln!(
-                    "{}: Unknown theme '{}', using default.",
-                    Yellow.paint("[bat warning]"),
-                    theme
-                );
+                if theme != "" {
+                    use ansi_term::Colour::Yellow;
+                    eprintln!(
+                        "{}: Unknown theme '{}', using default.",
+                        Yellow.paint("[bat warning]"),
+                        theme
+                    );
+                }
                 &self.theme_set.themes[self.fallback_theme.unwrap_or(Self::default_theme())]
             }
         }