Port commands to use common setup code

Initialization logic needed for serve, build, and upload is now
much more clear than it was when these functions were written.

This commit refactors all of them to use a new common_setup
module for all of their initialization that's the same.

src/commands/serve.rs

@@ -9,7 +9,7 @@ use termcolor::{BufferWriter, Color, ColorChoice, ColorSpec, WriteColor};
 
 use crate::{
     imfs::{Imfs, RealFetcher, WatchMode},
-    project::{Project, ProjectLoadError},
+    project::ProjectLoadError,
     serve_session::ServeSession,
     web::LiveServer,
 };
@@ -33,33 +33,18 @@ impl_from!(ServeError {
 });
 
 pub fn serve(options: &ServeOptions) -> Result<(), ServeError> {
-    let maybe_project = match Project::load_fuzzy(&options.fuzzy_project_path) {
-        Ok(project) => Some(project),
-        Err(ProjectLoadError::NotFound) => None,
-        Err(other) => return Err(other.into()),
-    };
+    let imfs = Imfs::new(RealFetcher::new(WatchMode::Enabled));
+
+    let session = Arc::new(ServeSession::new(imfs, &options.fuzzy_project_path));
 
     let port = options
         .port
-        .or_else(|| {
-            maybe_project
-                .as_ref()
-                .and_then(|project| project.serve_port)
-        })
+        .or_else(|| session.project_port())
         .unwrap_or(DEFAULT_PORT);
 
-    let _ = show_start_message(port);
-
-    let imfs = Imfs::new(RealFetcher::new(WatchMode::Enabled));
-
-    let session = Arc::new(ServeSession::new(
-        imfs,
-        &options.fuzzy_project_path,
-        maybe_project,
-    ));
-
     let server = LiveServer::new(session);
 
+    let _ = show_start_message(port);
     server.start(port);
 
     Ok(())