chore: pass defineEnv from next.js to rust directly (#56216)

### What?

Deduplicates our env var injection between the JS and rust side

Closes WEB-937

---------

Co-authored-by: Tim Neutkens <tim@timneutkens.nl>
Co-authored-by: Zack Tanner <zacktanner@gmail.com>

packages/next-swc/crates/napi/src/next_api/project.rs

@@ -7,7 +7,7 @@ use napi::{
     JsFunction, Status,
 };
 use next_api::{
-    project::{Middleware, ProjectContainer, ProjectOptions},
+    project::{DefineEnv, Middleware, PartialProjectOptions, ProjectContainer, ProjectOptions},
     route::{Endpoint, Route},
 };
 use next_core::tracing_presets::{
@@ -44,6 +44,7 @@ use super::{
 use crate::register;
 
 #[napi(object)]
+#[derive(Clone, Debug)]
 pub struct NapiEnvVar {
     pub name: String,
     pub value: String,
@@ -74,10 +75,56 @@ pub struct NapiProjectOptions {
     /// A map of environment variables to use when compiling code.
     pub env: Vec<NapiEnvVar>,
 
+    /// A map of environment variables which should get injected at compile
+    /// time.
+    pub define_env: NapiDefineEnv,
+
     /// The address of the dev server.
     pub server_addr: String,
 }
 
+/// [NapiProjectOptions] with all fields optional.
+#[napi(object)]
+pub struct NapiPartialProjectOptions {
+    /// A root path from which all files must be nested under. Trying to access
+    /// a file outside this root will fail. Think of this as a chroot.
+    pub root_path: Option<String>,
+
+    /// A path inside the root_path which contains the app/pages directories.
+    pub project_path: Option<String>,
+
+    /// next.config's distDir. Project initialization occurs eariler than
+    /// deserializing next.config, so passing it as separate option.
+    pub dist_dir: Option<Option<String>>,
+
+    /// Whether to watch he filesystem for file changes.
+    pub watch: Option<bool>,
+
+    /// The contents of next.config.js, serialized to JSON.
+    pub next_config: Option<String>,
+
+    /// The contents of ts/config read by load-jsconfig, serialized to JSON.
+    pub js_config: Option<String>,
+
+    /// A map of environment variables to use when compiling code.
+    pub env: Option<Vec<NapiEnvVar>>,
+
+    /// A map of environment variables which should get injected at compile
+    /// time.
+    pub define_env: Option<NapiDefineEnv>,
+
+    /// The address of the dev server.
+    pub server_addr: Option<String>,
+}
+
+#[napi(object)]
+#[derive(Clone, Debug)]
+pub struct NapiDefineEnv {
+    pub client: Vec<NapiEnvVar>,
+    pub edge: Vec<NapiEnvVar>,
+    pub nodejs: Vec<NapiEnvVar>,
+}
+
 #[napi(object)]
 pub struct NapiTurboEngineOptions {
     /// An upper bound of memory that turbopack will attempt to stay under.
@@ -95,13 +142,53 @@ impl From<NapiProjectOptions> for ProjectOptions {
             env: val
                 .env
                 .into_iter()
-                .map(|NapiEnvVar { name, value }| (name, value))
+                .map(|var| (var.name, var.value))
                 .collect(),
+            define_env: val.define_env.into(),
+            server_addr: val.server_addr,
+        }
+    }
+}
+
+impl From<NapiPartialProjectOptions> for PartialProjectOptions {
+    fn from(val: NapiPartialProjectOptions) -> Self {
+        PartialProjectOptions {
+            root_path: val.root_path,
+            project_path: val.project_path,
+            watch: val.watch,
+            next_config: val.next_config,
+            js_config: val.js_config,
+            env: val
+                .env
+                .map(|env| env.into_iter().map(|var| (var.name, var.value)).collect()),
+            define_env: val.define_env.map(|env| env.into()),
             server_addr: val.server_addr,
         }
     }
 }
 
+impl From<NapiDefineEnv> for DefineEnv {
+    fn from(val: NapiDefineEnv) -> Self {
+        DefineEnv {
+            client: val
+                .client
+                .into_iter()
+                .map(|var| (var.name, var.value))
+                .collect(),
+            edge: val
+                .edge
+                .into_iter()
+                .map(|var| (var.name, var.value))
+                .collect(),
+            nodejs: val
+                .nodejs
+                .into_iter()
+                .map(|var| (var.name, var.value))
+                .collect(),
+        }
+    }
+}
+
 pub struct ProjectInstance {
     turbo_tasks: Arc<TurboTasks<MemoryBackend>>,
     container: Vc<ProjectContainer>,
@@ -190,7 +277,7 @@ pub async fn project_new(
 #[napi(ts_return_type = "{ __napiType: \"Project\" }")]
 pub async fn project_update(
     #[napi(ts_arg_type = "{ __napiType: \"Project\" }")] project: External<ProjectInstance>,
-    options: NapiProjectOptions,
+    options: NapiPartialProjectOptions,
 ) -> napi::Result<()> {
     let turbo_tasks = project.turbo_tasks.clone();
     let options = options.into();

packages/next-swc/crates/napi/src/turbopack.rs

@@ -6,11 +6,13 @@ use std::{
 use anyhow::Context;
 use napi::bindgen_prelude::*;
 use next_build::{
-    build as turbo_next_build, build_options::BuildContext, BuildOptions as NextBuildOptions,
+    build as turbo_next_build,
+    build_options::{BuildContext, DefineEnv},
+    BuildOptions as NextBuildOptions,
 };
 use next_core::next_config::{Rewrite, Rewrites, RouteHas};
 
-use crate::util::MapErr;
+use crate::{next_api::project::NapiDefineEnv, util::MapErr};
 
 #[napi(object, object_to_js = false)]
 #[derive(Debug)]
@@ -38,6 +40,7 @@ pub struct NextBuildContext {
     // TODO(alexkirsz) These are used to generate route types.
     // pub original_rewrites: Option<Rewrites>,
     // pub original_redirects: Option<Vec<Redirect>>,
+    pub define_env: NapiDefineEnv,
 }
 
 impl TryFrom<NextBuildContext> for NextBuildOptions {
@@ -62,10 +65,33 @@ impl TryFrom<NextBuildContext> for NextBuildOptions {
                     .context("NextBuildContext must provide rewrites")?
                     .into(),
             }),
+            define_env: value.define_env.into(),
         })
     }
 }
 
+impl From<NapiDefineEnv> for DefineEnv {
+    fn from(val: NapiDefineEnv) -> Self {
+        DefineEnv {
+            client: val
+                .client
+                .into_iter()
+                .map(|var| (var.name, var.value))
+                .collect(),
+            edge: val
+                .edge
+                .into_iter()
+                .map(|var| (var.name, var.value))
+                .collect(),
+            nodejs: val
+                .nodejs
+                .into_iter()
+                .map(|var| (var.name, var.value))
+                .collect(),
+        }
+    }
+}
+
 /// Keep in sync with [`next_core::next_config::Rewrites`]
 #[napi(object, object_to_js = false)]
 #[derive(Debug)]

packages/next-swc/crates/next-api/src/app.rs

@@ -295,13 +295,8 @@ impl AppProject {
     async fn runtime_entries(self: Vc<Self>) -> Result<Vc<RuntimeEntries>> {
         let this = self.await?;
         Ok(get_server_runtime_entries(
-            self.project().project_path(),
-            // TODO(alexkirsz) Should we pass env here or EnvMap::empty, as is done in
-            // app_source?
-            self.project().env(),
             Value::new(self.rsc_ty()),
             this.mode,
-            self.project().next_config(),
         ))
     }
 
@@ -330,7 +325,6 @@ impl AppProject {
         let this = self.await?;
         Ok(get_client_runtime_entries(
             self.project().project_path(),
-            self.client_env(),
             Value::new(self.client_ty()),
             this.mode,
             self.project().next_config(),

packages/next-swc/crates/next-api/src/middleware.rs

@@ -68,11 +68,8 @@ impl MiddlewareEndpoint {
         );
 
         let mut evaluatable_assets = get_server_runtime_entries(
-            self.project.project_path(),
-            self.project.env(),
             Value::new(ServerContextType::Middleware),
             NextMode::Development,
-            self.project.next_config(),
         )
         .resolve_entries(self.context)
         .await?

packages/next-swc/crates/next-api/src/pages.rs

@@ -406,7 +406,6 @@ impl PagesProject {
         let this = self.await?;
         let client_runtime_entries = get_client_runtime_entries(
             self.project().project_path(),
-            self.project().env(),
             Value::new(ClientContextType::Pages {
                 pages_dir: self.pages_dir(),
             }),
@@ -421,27 +420,21 @@ impl PagesProject {
     async fn runtime_entries(self: Vc<Self>) -> Result<Vc<RuntimeEntries>> {
         let this = self.await?;
         Ok(get_server_runtime_entries(
-            self.project().project_path(),
-            self.project().env(),
             Value::new(ServerContextType::Pages {
                 pages_dir: self.pages_dir(),
             }),
             this.mode,
-            self.project().next_config(),
         ))
     }
 
     #[turbo_tasks::function]
     async fn data_runtime_entries(self: Vc<Self>) -> Result<Vc<RuntimeEntries>> {
         let this = self.await?;
         Ok(get_server_runtime_entries(
-            self.project().project_path(),
-            self.project().env(),
             Value::new(ServerContextType::PagesData {
                 pages_dir: self.pages_dir(),
             }),
             this.mode,
-            self.project().next_config(),
         ))
     }