Store model path in Model struct

Author: alexdewar

src/input.rs

@@ -196,7 +196,12 @@ pub fn load_model<P: AsRef<Path>>(model_dir: P) -> Result<(Model, AssetPool)> {
     let agent_ids = agents.keys().cloned().collect();
     let assets = read_assets(model_dir.as_ref(), &agent_ids, &processes, &region_ids)?;
 
+    let model_path = model_dir
+        .as_ref()
+        .canonicalize()
+        .context("Could not parse path to model")?;
     let model = Model {
+        model_path,
         milestone_years: model_file.milestone_years.years,
         agents,
         commodities,

src/model.rs

@@ -7,12 +7,14 @@ use crate::region::{RegionID, RegionMap};
 use crate::time_slice::TimeSliceInfo;
 use anyhow::{ensure, Context, Result};
 use serde::Deserialize;
-use std::path::Path;
+use std::path::{Path, PathBuf};
 
 const MODEL_FILE_NAME: &str = "model.toml";
 
 /// Model definition
 pub struct Model {
+    /// Path to model folder
+    pub model_path: PathBuf,
     /// Milestone years for the simulation. Sorted.
     pub milestone_years: Vec<u32>,
     /// Agents for the simulation