feat: Initial support for cargo profiles

This isn't the complete "trunk profile" implementation, but maybe a
short term solution in the right direction.

This allows setting a cargo profile on multiple levels. The idea is to
allow influencing the cargo profile only. The trunk release flag still
works as before. However you can now choose a `--cargo-profile` from
the command line, from the Trunk.toml, from the `index.html` data
attributes. In that order of preference.

Trunk.toml

@@ -8,6 +8,8 @@ trunk-version = "*"
 target = "index.html"
 # Build in release mode.
 release = false
+# Use a custom cargo profile
+# cargo_profile = ""
 # The output dir for all final assets.
 dist = "dist"
 # The public URL from which assets are to be served.
@@ -26,6 +28,8 @@ locked = false
 minify = "never" # can be one of: never, on_release, always
 # Allow disabling sub-resource integrity (SRI)
 no_sri = false
+# An optional cargo profile to use
+# cargo_profile = "release.trunk"
 
 [watch]
 # Paths to watch. The `build.target`'s parent folder is watched by default.

guide/src/assets/index.md

@@ -38,6 +38,9 @@ This will typically look like: `<link data-trunk rel="{type}" href="{path}" ..ot
 - `data-wasm-import-name`: (optional) the name of the global variable where the functions imported from WASM will be available (under the `window` object). Defaults to `wasmBindings` (which makes them available via `window.wasmBindings.<functionName>`).
 - `data-target-path`: (optional) Path where the output is placed inside the dist dir. If not present, the directory is placed in the dist root. The path must be a relative path without `..`.
 - `data-initializer`: (optional) Path to the (module) JavaScript file of the [initializer](../advanced/initializer.md).
+- `data-cargo-profile`: (optional) A cargo profile to use, instead of the default, for both release or dev mode.
+- `data-cargo-profile-release`: (optional) A cargo profile to use, instead of the default, for the release mode. Overrides the `data-cargo-profile` setting.
+- `data-cargo-profile-dev`: (optional) A cargo profile to use, instead of the default, for the dev mode. Overrides the `data-cargo-profile` setting.
 
 ### sass/scss
 

schemas/config.json

@@ -9,6 +9,7 @@
         "accept_invalid_certs": false,
         "all_features": false,
         "allow_self_closing_script": false,
+        "cargo_profile": null,
         "dist": "dist",
         "filehash": true,
         "frozen": false,
@@ -106,6 +107,14 @@
           "default": false,
           "type": "boolean"
         },
+        "cargo_profile": {
+          "description": "Cargo profile to use. Conflicts with `release`.",
+          "default": null,
+          "type": [
+            "string",
+            "null"
+          ]
+        },
         "dist": {
           "description": "The output dir for all final assets",
           "default": "dist",

src/cmd/build.rs

@@ -24,6 +24,10 @@ pub struct Build {
     #[arg(default_missing_value="true", num_args=0..=1)]
     pub release: Option<bool>,
 
+    /// Cargo profile to use for building.
+    #[arg(long, env = "TRUNK_BUILD_CARGO_PROFILE")]
+    pub cargo_profile: Option<String>,
+
     /// The output dir for all final assets
     #[arg(short, long, env = "TRUNK_BUILD_DIST")]
     pub dist: Option<PathBuf>,
@@ -122,6 +126,7 @@ impl Build {
             core,
             target,
             release,
+            cargo_profile,
             dist,
             offline,
             frozen,
@@ -142,6 +147,7 @@ impl Build {
 
         config.build.target = target.unwrap_or(config.build.target);
         config.build.release = release.unwrap_or(config.build.release);
+        config.build.cargo_profile = cargo_profile.or(config.build.cargo_profile);
         config.build.dist = dist.unwrap_or(config.build.dist);
         config.build.offline = offline.unwrap_or(config.build.offline);
         config.build.frozen = frozen.unwrap_or(config.build.frozen);

src/config/models/build.rs

@@ -23,6 +23,10 @@ pub struct Build {
     #[serde(default)]
     pub release: bool,
 
+    /// Cargo profile to use. Conflicts with `release`.
+    #[serde(default)]
+    pub cargo_profile: Option<String>,
+
     /// The output dir for all final assets
     #[serde(default = "default::dist")]
     pub dist: PathBuf,
@@ -184,6 +188,7 @@ impl Default for Build {
         Self {
             target: default::target(),
             release: false,
+            cargo_profile: None,
             dist: default::dist(),
             offline: false,
             frozen: false,

src/config/rt/build.rs

@@ -32,6 +32,8 @@ pub struct RtcBuild {
     pub target_parent: PathBuf,
     /// Build in release mode.
     pub release: bool,
+    /// Cargo profile to use instead of the default selection.
+    pub cargo_profile: Option<String>,
     /// Build without network access
     pub offline: bool,
     /// Require Cargo.lock and cache are up to date
@@ -173,6 +175,7 @@ impl RtcBuild {
             target,
             target_parent,
             release: build.release,
+            cargo_profile: build.cargo_profile,
             public_url,
             filehash: build.filehash,
             staging_dist,
@@ -211,6 +214,7 @@ impl RtcBuild {
             target,
             target_parent,
             release: false,
+            cargo_profile: None,
             public_url: Default::default(),
             filehash: true,
             final_dist,

src/pipelines/rust/mod.rs

@@ -47,6 +47,8 @@ pub struct RustApp {
     cfg: Arc<RtcBuild>,
     /// Skip building
     skip_build: bool,
+    /// Cargo profile to use
+    cargo_profile: Option<String>,
     /// The configuration of the features passed to cargo.
     cargo_features: Features,
     /// Is this module main or a worker?
@@ -186,10 +188,6 @@ impl RustApp {
         let id = Some(id);
         let name = bin.clone().unwrap_or_else(|| manifest.package.name.clone());
 
-        let data_features = attrs.get("data-cargo-features").map(|val| val.to_string());
-        let data_all_features = attrs.contains_key("data-cargo-all-features");
-        let data_no_default_features = attrs.contains_key("data-cargo-no-default-features");
-
         let loader_shim = attrs.contains_key("data-loader-shim");
         if loader_shim {
             ensure!(
@@ -198,14 +196,28 @@ impl RustApp {
             );
         }
 
+        // cargo profile
+
+        let cargo_profile = match cfg.release {
+            true => attrs.get("data-cargo-profile-dev"),
+            false => attrs.get("data-cargo-profile-release"),
+        }
+        .or_else(|| attrs.get("data-cargo-profile"))
+        .or_else(|| cfg.cargo_profile.as_ref())
+        .cloned();
+
+        // cargo features
+
+        let data_features = attrs.get("data-cargo-features").map(|val| val.to_string());
+        let data_all_features = attrs.contains_key("data-cargo-all-features");
+        let data_no_default_features = attrs.contains_key("data-cargo-no-default-features");
+
         // Highlander-rule: There can be only one (prohibits contradicting arguments):
         ensure!(
             !(data_all_features && (data_no_default_features || data_features.is_some())),
             "Cannot combine --all-features with --no-default-features and/or --features"
         );
 
-        let skip_build = attrs.contains_key("data-trunk-skip");
-
         let cargo_features = if data_all_features {
             Features::All
         } else if data_no_default_features || data_features.is_some() {
@@ -219,6 +231,10 @@ impl RustApp {
             cfg.cargo_features.clone()
         };
 
+        // skip
+
+        let skip_build = attrs.contains_key("data-trunk-skip");
+
         // bindings
 
         let import_bindings = !attrs.contains_key("data-wasm-no-import");
@@ -246,6 +262,7 @@ impl RustApp {
             id,
             cfg,
             skip_build,
+            cargo_profile,
             cargo_features,
             manifest,
             ignore_chan,
@@ -294,6 +311,7 @@ impl RustApp {
             id: None,
             skip_build: false,
             cargo_features: cfg.cargo_features.clone(),
+            cargo_profile: None,
             cfg,
             manifest,
             ignore_chan,
@@ -365,7 +383,10 @@ impl RustApp {
             "--manifest-path",
             &self.manifest.manifest_path,
         ];
-        if self.cfg.release {
+        if let Some(profile) = &self.cargo_profile {
+            args.push("--profile");
+            args.push(profile);
+        } else if self.cfg.release {
             args.push("--release");
         }
         if self.cfg.offline {