WIP: report target recipe inputs better

tools/src/repo.rs

@@ -23,26 +23,31 @@ impl Repo {
 
     pub fn compile(self: &Self, target: &str) -> anyhow::Result<()> {
         let recipe = self.get_recipe(target);
+
+        // FIXME: Accumulate `inputs` from our callees, pass up to our
+        // caller via the Result?
+        //
+        // Or have a "compile context" argument with the "cost" in it,
+        // and update that as we go?
+        //
+        // Maybe in the context we should also construct a parallel
+        // build process?
+
+        // let inputs = std::collections::HashMap::<String, usize>::new();
+        // let price_per_unit = std::collections::HashMap::<String, f32>::new();
+
         match recipe {
             None => {
                 return Err(anyhow::Error::msg(format!("recipe for {target} not found")));
             }
             Some(recipe) => {
-                println!("{recipe:#?}");
+                println!("building {target:#?}");
                 println!("inputs:");
-                for (key, val) in recipe.inputs.iter() {
-                    println!("{key:?} {val:?}");
-                    if key == "capital" {
-                        println!("aquire capital: {:?}", val.amount.to_owned());
-                    } else {
-                        self.compile(key)?;
+                self.compile_inner(recipe, 4)
             }
         }
     }
 }
-        Ok(())
-    }
-}
 
 impl Repo {
     fn add_dir(self: &mut Self, path: &str) -> anyhow::Result<()> {
@@ -78,4 +83,59 @@ impl Repo {
         }
         Ok(())
     }
+
+    fn compile_inner(self: &Self, recipe: &Recipe, indent: usize) -> anyhow::Result<()> {
+        for (key, val) in recipe.inputs.iter() {
+            for _ in 0..indent {
+                print!(" ");
+            }
+
+            if key == "capital" {
+                // The build process begins in capitalism :-(
+
+                if let Some(amount) = &val.amount {
+                    // I'd like to divide the amount of capital by the
+                    // quantity of the thing purchased.
+                    //
+                    // We can probably assume the `recipe.outputs` Option
+                    // is Some, but inside the Some is a container with
+                    // potentially any number of output things, which
+                    // makes it hard to account.
+                    //
+                    // For now i'll just handle the common case specially.
+
+                    if let Some(a) = amount.split_whitespace().next() {
+                        let cost = a.parse::<f32>().unwrap();
+                        if let Some(outputs) = &recipe.outputs {
+                            if outputs.len() == 1 {
+                                for (_k, v) in outputs.iter() {
+                                    if let Some(quantity) = &v.quantity {
+                                        println!(
+                                            "capital: {cost}/{quantity} = {:.2} each :-(",
+                                            cost / *quantity as f32
+                                        );
+                                    } else if let Some(amount) = &v.amount {
+                                        println!("capital: {cost}/{amount:?} :-(",);
+                                    }
+                                }
+                            }
+                        }
+                    }
+                } else {
+                    panic!("no amount of capital?");
+                }
+                continue;
+            }
+            println!("{key:?} {val:?}");
+            match self.get_recipe(key) {
+                None => {
+                    return Err(anyhow::Error::msg(format!("recipe for {key} not found")));
+                }
+                Some(input_recipe) => {
+                    self.compile_inner(input_recipe, indent + 4)?;
+                }
+            }
+        }
+        Ok(())
+    }
 }