Read settings.toml from CWD cf. model dir

Closes #513.

Author: alexdewar

examples/simple/settings.toml settings.tomlexamples/simple/settings.toml renamed to settings.toml

@@ -80,7 +80,7 @@ pub fn handle_run_command(
     debug_model: bool,
 ) -> Result<()> {
     // Load program settings
-    let mut settings = Settings::from_path(model_path).context("Failed to load settings.")?;
+    let mut settings = Settings::load().context("Failed to load settings.")?;
 
     // This setting can be overridden by command-line argument
     if debug_model {

src/commands.rs

@@ -28,41 +28,45 @@ impl Settings {
     /// # Returns
     ///
     /// The program settings as a `Settings` struct or an error if the file is invalid
-    pub fn from_path<P: AsRef<Path>>(model_dir: P) -> Result<Settings> {
-        let file_path = model_dir.as_ref().join(SETTINGS_FILE_NAME);
+    pub fn load() -> Result<Settings> {
+        let file_path = Path::new(SETTINGS_FILE_NAME);
         if !file_path.is_file() {
             return Ok(Settings::default());
         }
 
-        read_toml(&file_path)
+        read_toml(file_path)
     }
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
+    use current_dir::Cwd;
     use std::fs::File;
     use std::io::Write;
     use tempfile::tempdir;
 
     #[test]
     fn test_settings_from_path_no_file() {
         let dir = tempdir().unwrap();
-        assert_eq!(
-            Settings::from_path(dir.path()).unwrap(),
-            Settings::default()
-        );
+        let mut cwd = Cwd::mutex().lock().unwrap();
+        cwd.set(dir.path()).unwrap();
+        assert_eq!(Settings::load().unwrap(), Settings::default());
     }
 
     #[test]
     fn test_settings_from_path() {
         let dir = tempdir().unwrap();
+        let mut cwd = Cwd::mutex().lock().unwrap();
+        cwd.set(dir.path()).unwrap();
+
         {
-            let mut file = File::create(dir.path().join(SETTINGS_FILE_NAME)).unwrap();
+            let mut file = File::create(Path::new(SETTINGS_FILE_NAME)).unwrap();
             writeln!(file, "log_level = \"warn\"").unwrap();
         }
+
         assert_eq!(
-            Settings::from_path(dir.path()).unwrap(),
+            Settings::load().unwrap(),
             Settings {
                 log_level: Some("warn".to_string()),
                 debug_model: false