handle relative paths without leading ./

src/main.rs

@@ -1,5 +1,7 @@
+use std::ffi::OsStr;
 use std::io::{self, IsTerminal};
-use std::path::Path;
+use std::iter;
+use std::path::{Path, PathBuf};
 use std::process::ExitCode;
 use std::{error::Error as StdError, sync::Arc};
 
@@ -20,11 +22,17 @@ fn main_wrapped() -> Result<(), Box<dyn StdError + Send + Sync + 'static>> {
         success.expect("logic error in CLI_ENABLE_COLOR");
     }
 
-    // FIXME: handle relative paths without leading ./
     let filepath = Path::new(&args.file);
+    let filepath: PathBuf = if filepath.is_relative() && !filepath.starts_with("./") {
+        iter::once(OsStr::new("./"))
+            .chain(filepath.iter())
+            .collect()
+    } else {
+        filepath.to_path_buf()
+    };
 
     // Get what file that thing is defined in.
-    let def_path = append_override::get_where(&args.name, filepath)?;
+    let def_path = append_override::get_where(&args.name, &filepath)?;
     let def_path = Arc::from(def_path);
     let mut opts = File::options();
     opts.read(true)