feat: bin flag for serve and build

packages/cli/src/config.rs

@@ -176,14 +176,19 @@ pub enum ExecutableType {
 }
 
 impl CrateConfig {
-    pub fn new() -> Result<Self> {
+    pub fn new(bin: Option<PathBuf>) -> Result<Self> {
         let dioxus_config = DioxusConfig::load()?.unwrap_or_default();
 
+        let crate_root = crate::cargo::crate_root()?;
+
         let crate_dir = if let Some(package) = &dioxus_config.application.sub_package {
-            crate::cargo::crate_root()?.join(package)
+            crate_root.join(package)
+        } else if let Some(bin) = bin {
+            crate_root.join(bin)
         } else {
-            crate::cargo::crate_root()?
+            crate_root
         };
+
         let meta = crate::cargo::Metadata::get()?;
         let workspace_dir = meta.workspace_root;
         let target_dir = meta.target_directory;
@@ -202,8 +207,9 @@ impl CrateConfig {
 
         let manifest = cargo_toml::Manifest::from_path(cargo_def).unwrap();
 
-        let output_filename = {
-            match &manifest.package.as_ref().unwrap().default_run {
+        let mut output_filename = String::from("dioxus_app");
+        if let Some(package) = &manifest.package.as_ref() {
+            output_filename = match &package.default_run {
                 Some(default_run_target) => default_run_target.to_owned(),
                 None => manifest
                     .bin
@@ -216,9 +222,10 @@ impl CrateConfig {
                     .or(manifest.bin.first())
                     .or(manifest.lib.as_ref())
                     .and_then(|prod| prod.name.clone())
-                    .expect("No executable or library found from cargo metadata."),
-            }
-        };
+                    .unwrap_or(String::from("dioxus_app")),
+            };
+        }
+
         let executable = ExecutableType::Binary(output_filename);
 
         let release = false;