build: make all build steps optional

build.rs

@@ -39,21 +39,17 @@ fn copy<U: AsRef<Path>, V: AsRef<Path>>(from: U, to: V) -> std::io::Result<()> {
 
 #[allow(unused_must_use)]
 fn main() -> std::io::Result<()> {
-    if env::var_os("NO_RESOURCES").is_some() {
-        return Ok(());
-    }
-
     let install_path = dirs::config_dir()
         .expect("Couldn't find a configuration directory to install to.")
         .join("ttyper");
     fs::remove_dir_all(&install_path);
-    fs::create_dir_all(&install_path)?;
+    fs::create_dir_all(&install_path);
 
     let resources_path = env::current_dir()
         .expect("Couldn't find the source directory.")
         .join("resources")
         .join("runtime");
-    copy(&resources_path, &install_path)?;
+    copy(&resources_path, &install_path);
 
     Ok(())
 }

src/main.rs

@@ -56,7 +56,7 @@ impl Opt {
                             .join("language")
                             .join(&self.language)
                     });
-                    let file = fs::File::open(path).expect("Error reading language file.");
+                    let file = fs::File::open(path).expect("Error reading language file. Make sure Luthien's config dir isn't missing.");
                     io::BufReader::new(file)
                         .lines()
                         .filter_map(Result::ok)