More fullstack fixes (#4737)

* allow `--server` only builds!

* rollback example

* capture `/:route` routes

* fix: properly implement file uploads in forms

* implement desktop form uploads

* Performant serialization of form bytes

* finish up file stuff

* cleanups

* add request headers to streaming context

* remove some unwraps

packages/cli/src/build/builder.rs

@@ -154,19 +154,20 @@ impl AppBuilder {
     }
 
     /// Create a new `AppBuilder` and immediately start a build process.
-    pub fn started(request: &BuildRequest, mode: BuildMode) -> Result<Self> {
+    pub fn started(request: &BuildRequest, mode: BuildMode, build_id: BuildId) -> Result<Self> {
         let mut builder = Self::new(request)?;
-        builder.start(mode);
+        builder.start(mode, build_id);
         Ok(builder)
     }
 
-    pub(crate) fn start(&mut self, mode: BuildMode) {
+    pub(crate) fn start(&mut self, mode: BuildMode, build_id: BuildId) {
         self.build_task = tokio::spawn({
             let request = self.build.clone();
             let tx = self.tx.clone();
             async move {
                 let ctx = BuildContext {
                     mode,
+                    build_id,
                     tx: tx.clone(),
                 };
                 request.verify_tooling(&ctx).await?;
@@ -290,10 +291,12 @@ impl AppBuilder {
         update
     }
 
-    pub(crate) fn patch_rebuild(&mut self, changed_files: Vec<PathBuf>) {
+    pub(crate) fn patch_rebuild(&mut self, changed_files: Vec<PathBuf>, build_id: BuildId) {
         // We need the rustc args from the original build to pass to the new build
         let Some(artifacts) = self.artifacts.as_ref().cloned() else {
-            tracing::warn!("Ignoring patch rebuild since there is no existing build.");
+            tracing::warn!(
+                "Ignoring patch rebuild for {build_id:?} since there is no existing build."
+            );
             return;
         };
 
@@ -327,6 +330,7 @@ impl AppBuilder {
         self.build_task = tokio::spawn({
             let request = self.build.clone();
             let ctx = BuildContext {
+                build_id,
                 tx: self.tx.clone(),
                 mode: BuildMode::Thin {
                     changed_files,
@@ -340,7 +344,7 @@ impl AppBuilder {
     }
 
     /// Restart this builder with new build arguments.
-    pub(crate) fn start_rebuild(&mut self, mode: BuildMode) {
+    pub(crate) fn start_rebuild(&mut self, mode: BuildMode, build_id: BuildId) {
         // Abort all the ongoing builds, cleaning up any loose artifacts and waiting to cleanly exit
         // And then start a new build, resetting our progress/stage to the beginning and replacing the old tokio task
         self.abort_all(BuildStage::Restarting);
@@ -351,6 +355,7 @@ impl AppBuilder {
             let ctx = BuildContext {
                 tx: self.tx.clone(),
                 mode,
+                build_id,
             };
             async move { request.build(&ctx).await }
         });

packages/cli/src/build/context.rs

@@ -16,6 +16,7 @@ use std::{path::PathBuf, process::ExitStatus};
 pub struct BuildContext {
     pub tx: ProgressTx,
     pub mode: BuildMode,
+    pub build_id: BuildId,
 }
 
 pub type ProgressTx = UnboundedSender<BuilderUpdate>;
@@ -24,8 +25,8 @@ pub type ProgressRx = UnboundedReceiver<BuilderUpdate>;
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize)]
 pub struct BuildId(pub(crate) usize);
 impl BuildId {
-    pub const CLIENT: Self = Self(0);
-    pub const SERVER: Self = Self(1);
+    pub const PRIMARY: Self = Self(0);
+    pub const SECONDARY: Self = Self(1);
 }
 
 #[allow(clippy::large_enum_variant)]
@@ -78,6 +79,12 @@ pub enum BuilderUpdate {
 }
 
 impl BuildContext {
+    /// Returns true if this is a client build - basically, is this the primary build?
+    /// We try not to duplicate work between client and server builds, like asset copying.
+    pub(crate) fn is_primary_build(&self) -> bool {
+        self.build_id == BuildId::PRIMARY
+    }
+
     pub(crate) fn status_wasm_bindgen_start(&self) {
         _ = self.tx.unbounded_send(BuilderUpdate::Progress {
             stage: BuildStage::RunningBindgen,

packages/cli/src/build/pre_render.rs

@@ -45,7 +45,7 @@ pub(crate) async fn pre_render_static_routes(
         devserver_ip,
         Some(fullstack_address),
         false,
-        BuildId::SERVER,
+        BuildId::SECONDARY,
     );
     // Run the server executable
     let _child = Command::new(&server_exe)

packages/cli/src/build/request.rs

@@ -320,9 +320,9 @@
 //! - xbuild: <https://github.com/rust-mobile/xbuild/blob/master/xbuild/src/command/build.rs>
 
 use crate::{
-    AndroidTools, BuildContext, BundleFormat, DioxusConfig, Error, LinkAction, LinkerFlavor,
-    Platform, Renderer, Result, RustcArgs, TargetArgs, TraceSrc, WasmBindgen, WasmOptConfig,
-    Workspace, DX_RUSTC_WRAPPER_ENV_VAR,
+    AndroidTools, BuildContext, BuildId, BundleFormat, DioxusConfig, Error, LinkAction,
+    LinkerFlavor, Platform, Renderer, Result, RustcArgs, TargetArgs, TraceSrc, WasmBindgen,
+    WasmOptConfig, Workspace, DX_RUSTC_WRAPPER_ENV_VAR,
 };
 use anyhow::{bail, Context};
 use cargo_metadata::diagnostic::Diagnostic;
@@ -445,7 +445,6 @@ pub enum BuildMode {
 #[derive(Clone, Debug)]
 pub struct BuildArtifacts {
     pub(crate) root_dir: PathBuf,
-    pub(crate) bundle: BundleFormat,
     pub(crate) exe: PathBuf,
     pub(crate) direct_rustc: RustcArgs,
     pub(crate) time_start: SystemTime,
@@ -454,6 +453,7 @@ pub struct BuildArtifacts {
     pub(crate) mode: BuildMode,
     pub(crate) patch_cache: Option<Arc<HotpatchModuleCache>>,
     pub(crate) depinfo: RustcDepInfo,
+    pub(crate) build_id: BuildId,
 }
 
 impl BuildRequest {
@@ -989,10 +989,10 @@ impl BuildRequest {
         _ = std::fs::File::create_new(self.windows_command_file());
 
         if !matches!(ctx.mode, BuildMode::Thin { .. }) {
-            self.prepare_build_dir()?;
+            self.prepare_build_dir(ctx)?;
         }
 
-        if self.bundle == BundleFormat::Server {
+        if !ctx.is_primary_build() {
             return Ok(());
         }
 
@@ -1250,7 +1250,6 @@ impl BuildRequest {
         let assets = self.collect_assets(&exe, ctx).await?;
         let time_end = SystemTime::now();
         let mode = ctx.mode.clone();
-        let bundle = self.bundle;
         let depinfo = RustcDepInfo::from_file(&exe.with_extension("d")).unwrap_or_default();
 
         tracing::debug!(
@@ -1261,7 +1260,6 @@ impl BuildRequest {
 
         Ok(BuildArtifacts {
             time_end,
-            bundle,
             exe,
             direct_rustc,
             time_start,
@@ -1270,6 +1268,7 @@ impl BuildRequest {
             depinfo,
             root_dir: self.root_dir(),
             patch_cache: None,
+            build_id: ctx.build_id,
         })
     }
 
@@ -1460,7 +1459,7 @@ impl BuildRequest {
     /// Should be the same on all platforms - just copy over the assets from the manifest into the output directory
     async fn write_assets(&self, ctx: &BuildContext, assets: &AssetManifest) -> Result<()> {
         // Server doesn't need assets - web will provide them
-        if self.bundle == BundleFormat::Server {
+        if !ctx.is_primary_build() {
             return Ok(());
         }
 
@@ -4320,14 +4319,14 @@ __wbg_init({{module_or_path: "/{}/{wasm_path}"}}).then((wasm) => {{
     /// - extra scaffolding
     ///
     /// It's not guaranteed that they're different from any other folder
-    pub(crate) fn prepare_build_dir(&self) -> Result<()> {
+    pub(crate) fn prepare_build_dir(&self, ctx: &BuildContext) -> Result<()> {
         use std::fs::{create_dir_all, remove_dir_all};
         use std::sync::OnceLock;
 
         static INITIALIZED: OnceLock<Result<()>> = OnceLock::new();
 
         let success = INITIALIZED.get_or_init(|| {
-            if self.bundle != BundleFormat::Server {
+            if ctx.is_primary_build() {
                 _ = remove_dir_all(self.exe_dir());
             }