Implement build command, shuffle around some internals to make it easier

server/src/commands/build.rs

@@ -1,5 +1,15 @@
 use std::{
     path::PathBuf,
+    fs::File,
+    process,
+};
+
+use rbxmx;
+
+use crate::{
+    rbx_session::construct_oneoff_tree,
+    project::Project,
+    imfs::Imfs,
 };
 
 #[derive(Debug)]
@@ -9,5 +19,27 @@ pub struct BuildOptions {
 }
 
 pub fn build(options: &BuildOptions) {
-    println!("build {:#?}", options);
+    info!("Looking for project at {}", options.fuzzy_project_path.display());
+
+    let project = match Project::load_fuzzy(&options.fuzzy_project_path) {
+        Ok(project) => project,
+        Err(error) => {
+            error!("{}", error);
+            process::exit(1);
+        },
+    };
+
+    info!("Found project at {}", project.file_location.display());
+    info!("Using project {:#?}", project);
+
+    let imfs = Imfs::new(&project)
+        .expect("Could not create in-memory filesystem");
+
+    let tree = construct_oneoff_tree(&project, &imfs);
+    let root_id = tree.get_root_id();
+
+    let mut file = File::create(&options.output_file)
+        .expect("Could not open output file for write");
+
+    rbxmx::encode(&tree, &[root_id], &mut file);
 }