feat: add mainBinaryName option (#10977)

* feat: add `mainBinaryName` option

* remove unused imports [skip ci]

* enhance error message [skip ci]

* migrate `mainBinaryName`

* change file

* revert bin src_path

* add link

---------

Co-authored-by: Lucas Nogueira <lucas@tauri.app>

.changes/changelog-path-deb.md

@@ -0,0 +1,5 @@
+---
+'tauri-bundler': 'major:breaking'
+---
+
+Changed changelog file location in `deb` to `usr/share/doc/<product_name>/changelog.gz` instead of `usr/share/doc/<main_binary_name>/changelog.gz`. For tauri v1 users, the path is unchanged as `product_name` and `main_binary_name` used the same value.

.changes/main_binary_name.md

@@ -0,0 +1,8 @@
+---
+"tauri": "patch:feat"
+"tauri-utils": "patch:feat"
+"tauri-cli": "patch:feat"
+"tauri-bundler": "patch:feat"
+---
+
+Add `mainBinaryName` config option to set the file name for the main binary.

.changes/resources-path-deb-rpm.md

@@ -0,0 +1,5 @@
+---
+'tauri-bundler': 'major:breaking'
+---
+
+Changed resources directory location in `deb` and `rpm` to `/usr/lib/<product_name>` instead of `/usr/lib/<main_binary_name>`. For tauri v1 users, the path is unchanged as `product_name` and `main_binary_name` used the same value.

crates/tauri-bundler/src/bundle/linux/appimage.rs

@@ -56,7 +56,7 @@ pub fn bundle_project(settings: &Settings) -> crate::Result<Vec<PathBuf>> {
   // setup data to insert into shell script
   let mut sh_map = BTreeMap::new();
   sh_map.insert("arch", settings.target().split('-').next().unwrap());
-  sh_map.insert("crate_name", settings.main_binary_name());
+  sh_map.insert("product_name", settings.product_name());
   sh_map.insert("appimage_filename", &appimage_filename);
 
   let tauri_tools_path = settings

crates/tauri-bundler/src/bundle/linux/debian.rs

@@ -133,8 +133,8 @@ pub fn generate_data(
 fn generate_changelog_file(settings: &Settings, data_dir: &Path) -> crate::Result<()> {
   if let Some(changelog_src_path) = &settings.deb().changelog {
     let mut src_file = File::open(changelog_src_path)?;
-    let bin_name = settings.main_binary_name();
-    let dest_path = data_dir.join(format!("usr/share/doc/{}/changelog.gz", bin_name));
+    let product_name = settings.product_name();
+    let dest_path = data_dir.join(format!("usr/share/doc/{product_name}/changelog.gz"));
 
     let changelog_file = common::create_file(&dest_path)?;
     let mut gzip_encoder = GzEncoder::new(changelog_file, Compression::new(9));
@@ -306,7 +306,7 @@ fn generate_md5sums(control_dir: &Path, data_dir: &Path) -> crate::Result<()> {
 /// Copy the bundle's resource files into an appropriate directory under the
 /// `data_dir`.
 fn copy_resource_files(settings: &Settings, data_dir: &Path) -> crate::Result<()> {
-  let resource_dir = data_dir.join("usr/lib").join(settings.main_binary_name());
+  let resource_dir = data_dir.join("usr/lib").join(settings.product_name());
   settings.copy_resources(&resource_dir)
 }
 

crates/tauri-bundler/src/bundle/linux/freedesktop.rs

@@ -44,13 +44,14 @@ pub fn list_icon_files(
   data_dir: &Path,
 ) -> crate::Result<BTreeMap<Icon, PathBuf>> {
   let base_dir = data_dir.join("usr/share/icons/hicolor");
+  let main_binary_name = settings.main_binary_name()?;
   let get_dest_path = |width: u32, height: u32, is_high_density: bool| {
     base_dir.join(format!(
       "{}x{}{}/apps/{}.png",
       width,
       height,
       if is_high_density { "@2" } else { "" },
-      settings.main_binary_name()
+      main_binary_name
     ))
   };
   let mut icons = BTreeMap::new();
@@ -97,8 +98,9 @@ pub fn generate_desktop_file(
   custom_template_path: &Option<PathBuf>,
   data_dir: &Path,
 ) -> crate::Result<(PathBuf, PathBuf)> {
-  let bin_name = settings.main_binary_name();
-  let desktop_file_name = format!("{bin_name}.desktop");
+  let bin_name = settings.main_binary_name()?;
+  let product_name = settings.product_name();
+  let desktop_file_name = format!("{product_name}.desktop");
   let path = PathBuf::from("usr/share/applications").join(desktop_file_name);
   let dest_path = PathBuf::from("/").join(&path);
   let file_path = data_dir.join(&path);

crates/tauri-bundler/src/bundle/linux/rpm.rs

@@ -141,12 +141,12 @@ pub fn bundle_project(settings: &Settings) -> crate::Result<Vec<PathBuf>> {
 
   // Add resources
   if settings.resource_files().count() > 0 {
-    let resource_dir = Path::new("/usr/lib").join(settings.main_binary_name());
+    let resource_dir = Path::new("/usr/lib").join(settings.product_name());
     // Create an empty file, needed to add a directory to the RPM package
     // (cf https://github.com/rpm-rs/rpm/issues/177)
     let empty_file_path = &package_dir.join("empty");
     File::create(empty_file_path)?;
-    // Then add the resource directory `/usr/lib/<binary_name>` to the package.
+    // Then add the resource directory `/usr/lib/<product_name>` to the package.
     builder = builder.with_file(
       empty_file_path,
       FileOptions::new(resource_dir.to_string_lossy()).mode(FileMode::Dir { permissions: 0o755 }),

crates/tauri-bundler/src/bundle/linux/templates/appimage

@@ -17,10 +17,10 @@ else
     linuxdeploy_arch="$ARCH"
 fi
 
-mkdir -p "{{crate_name}}.AppDir"
-cp -r ../appimage_deb/data/usr "{{crate_name}}.AppDir"
+mkdir -p "{{product_name}}.AppDir"
+cp -r ../appimage_deb/data/usr "{{product_name}}.AppDir"
 
-cd "{{crate_name}}.AppDir"
+cd "{{product_name}}.AppDir"
 mkdir -p "usr/bin"
 mkdir -p "usr/lib"
 
@@ -56,14 +56,14 @@ find -L /usr/lib* -name libwebkit2gtkinjectedbundle.so -exec mkdir -p "$(dirname
 ( cd "{{tauri_tools_path}}" && ( wget -q -4 -N https://github.com/AppImage/AppImageKit/releases/download/continuous/AppRun-${ARCH} || wget -q -4 -N https://github.com/AppImage/AppImageKit/releases/download/12/AppRun-${ARCH} ) )
 chmod +x "{{tauri_tools_path}}/AppRun-${ARCH}"
 
-# We need AppRun to be installed as {{crate_name}}.AppDir/AppRun.
+# We need AppRun to be installed as {{product_name}}.AppDir/AppRun.
 # Otherwise the linuxdeploy scripts will default to symlinking our main bin instead and will crash on trying to launch.
 cp "{{tauri_tools_path}}/AppRun-${ARCH}" AppRun
 
 cp "{{icon_path}}" .DirIcon
-ln -sf "{{icon_path}}" "{{crate_name}}.png"
+ln -sf "{{icon_path}}" "{{product_name}}.png"
 
-ln -sf "usr/share/applications/{{crate_name}}.desktop" "{{crate_name}}.desktop"
+ln -sf "usr/share/applications/{{product_name}}.desktop" "{{product_name}}.desktop"
 
 cd ..
 
@@ -83,4 +83,4 @@ chmod +x "{{tauri_tools_path}}/linuxdeploy-${linuxdeploy_arch}.AppImage"
 
 dd if=/dev/zero bs=1 count=3 seek=8 conv=notrunc of="{{tauri_tools_path}}/linuxdeploy-${linuxdeploy_arch}.AppImage"
 
-OUTPUT="{{appimage_filename}}" "{{tauri_tools_path}}/linuxdeploy-${linuxdeploy_arch}.AppImage" --appimage-extract-and-run --appdir "{{crate_name}}.AppDir" --plugin gtk ${gst_plugin} --output appimage
+OUTPUT="{{appimage_filename}}" "{{tauri_tools_path}}/linuxdeploy-${linuxdeploy_arch}.AppImage" --appimage-extract-and-run --appdir "{{product_name}}.AppDir" --plugin gtk ${gst_plugin} --output appimage

crates/tauri-bundler/src/bundle/macos/app.rs

@@ -200,7 +200,7 @@ fn create_info_plist(
   plist.insert("CFBundleDisplayName".into(), settings.product_name().into());
   plist.insert(
     "CFBundleExecutable".into(),
-    settings.main_binary_name().into(),
+    settings.main_binary_name()?.into(),
   );
   if let Some(path) = bundle_icon_file {
     plist.insert(

crates/tauri-bundler/src/bundle/macos/ios.rs

@@ -170,7 +170,7 @@ fn generate_info_plist(
   writeln!(
     file,
     "  <key>CFBundleExecutable</key>\n  <string>{}</string>",
-    settings.main_binary_name()
+    settings.main_binary_name()?
   )?;
   writeln!(
     file,

crates/tauri-bundler/src/bundle/settings.rs

@@ -5,6 +5,7 @@
 
 use super::category::AppCategory;
 use crate::bundle::{common, platform::target_triple};
+use anyhow::Context;
 pub use tauri_utils::config::WebviewInstallMode;
 use tauri_utils::{
   config::{BundleType, DeepLinkProtocol, FileAssociation, NSISInstallerMode, NsisCompression},
@@ -617,8 +618,8 @@ pub struct BundleSettings {
 #[derive(Clone, Debug)]
 pub struct BundleBinary {
   name: String,
-  src_path: Option<String>,
   main: bool,
+  src_path: Option<String>,
 }
 
 impl BundleBinary {
@@ -626,8 +627,8 @@ impl BundleBinary {
   pub fn new(name: String, main: bool) -> Self {
     Self {
       name,
-      src_path: None,
       main,
+      src_path: None,
     }
   }
 
@@ -640,13 +641,6 @@ impl BundleBinary {
     }
   }
 
-  /// Sets the src path of the binary.
-  #[must_use]
-  pub fn set_src_path(mut self, src_path: Option<String>) -> Self {
-    self.src_path = src_path;
-    self
-  }
-
   /// Mark the binary as the main executable.
   pub fn set_main(&mut self, main: bool) {
     self.main = main;
@@ -657,9 +651,11 @@ impl BundleBinary {
     self.name = name;
   }
 
-  /// Returns the binary name.
-  pub fn name(&self) -> &str {
-    &self.name
+  /// Sets the src path of the binary.
+  #[must_use]
+  pub fn set_src_path(mut self, src_path: Option<String>) -> Self {
+    self.src_path = src_path;
+    self
   }
 
   /// Returns the binary `main` flag.
@@ -667,6 +663,11 @@ impl BundleBinary {
     self.main
   }
 
+  /// Returns the binary name.
+  pub fn name(&self) -> &str {
+    &self.name
+  }
+
   /// Returns the binary source path.
   pub fn src_path(&self) -> Option<&String> {
     self.src_path.as_ref()
@@ -852,14 +853,24 @@ impl Settings {
   }
 
   /// Returns the file name of the binary being bundled.
-  pub fn main_binary_name(&self) -> &str {
+  pub fn main_binary(&self) -> crate::Result<&BundleBinary> {
     self
       .binaries
       .iter()
       .find(|bin| bin.main)
-      .expect("failed to find main binary")
-      .name
-      .as_str()
+      .context("failed to find main binary, make sure you have a `package > default-run` in the Cargo.toml file")
+      .map_err(Into::into)
+  }
+
+  /// Returns the file name of the binary being bundled.
+  pub fn main_binary_name(&self) -> crate::Result<&str> {
+    self
+      .binaries
+      .iter()
+      .find(|bin| bin.main)
+      .context("failed to find main binary, make sure you have a `package > default-run` in the Cargo.toml file")
+      .map(|b| b.name.as_str())
+      .map_err(Into::into)
   }
 
   /// Returns the path to the specified binary.

crates/tauri-bundler/src/bundle/windows/msi/wix.rs

@@ -304,11 +304,7 @@ fn run_candle(
     }
   };
 
-  let main_binary = settings
-    .binaries()
-    .iter()
-    .find(|bin| bin.main())
-    .ok_or_else(|| anyhow::anyhow!("Failed to get main binary"))?;
+  let main_binary = settings.main_binary()?;
 
   let mut args = vec![
     "-arch".to_string(),
@@ -404,13 +400,6 @@ pub fn build_wix_app_installer(
   // target only supports x64.
   log::info!("Target: {}", arch);
 
-  let main_binary = settings
-    .binaries()
-    .iter()
-    .find(|bin| bin.main())
-    .ok_or_else(|| anyhow::anyhow!("Failed to get main binary"))?;
-  let app_exe_source = settings.binary_path(main_binary);
-
   let output_path = settings.project_out_directory().join("wix").join(arch);
 
   if output_path.exists() {
@@ -546,10 +535,6 @@ pub fn build_wix_app_installer(
   let shortcut_guid = generate_package_guid(settings).to_string();
   data.insert("shortcut_guid", to_json(shortcut_guid.as_str()));
 
-  // Note: `main_binary_name` is not used in our template but we keep it as it is potentially useful for custom temples
-  let main_binary_name = settings.main_binary_name().to_string();
-  data.insert("main_binary_name", to_json(&main_binary_name));
-
   let binaries = generate_binaries_data(settings)?;
 
   let binaries_json = to_json(binaries);
@@ -572,7 +557,13 @@ pub fn build_wix_app_installer(
   let merge_modules = get_merge_modules(settings)?;
   data.insert("merge_modules", to_json(merge_modules));
 
-  data.insert("app_exe_source", to_json(app_exe_source));
+  // Note: `main_binary_name` is not used in our template but we keep it as it is potentially useful for custom temples
+  let main_binary_name = settings.main_binary_name()?;
+  data.insert("main_binary_name", to_json(main_binary_name));
+
+  let main_binary = settings.main_binary()?;
+  let main_binary_path = settings.binary_path(main_binary);
+  data.insert("main_binary_path", to_json(main_binary_path));
 
   // copy icon from `settings.windows().icon_path` folder to resource folder near msi
   let icon_path = copy_icon(settings, "icon.ico", &settings.windows().icon_path)?;

crates/tauri-bundler/src/bundle/windows/nsis.rs

@@ -336,21 +336,9 @@ fn build_nsis_app_installer(
   }
   data.insert("language_files", to_json(language_files_paths));
 
-  let main_binary = settings
-    .binaries()
-    .iter()
-    .find(|bin| bin.main())
-    .ok_or_else(|| anyhow::anyhow!("Failed to get main binary"))?;
+  let main_binary = settings.main_binary()?;
   let main_binary_path = settings.binary_path(main_binary).with_extension("exe");
-  data.insert(
-    "main_binary_name",
-    to_json(
-      main_binary_path
-        .file_stem()
-        .and_then(|file_name| file_name.to_str())
-        .unwrap_or_else(|| main_binary.name()),
-    ),
-  );
+  data.insert("main_binary_name", to_json(main_binary.name()));
   data.insert("main_binary_path", to_json(&main_binary_path));
 
   let out_file = "nsis-output.exe";

crates/tauri-bundler/src/bundle/windows/templates/main.wxs

@@ -139,7 +139,7 @@
                 {{/each~}}
             </Component>
             <Component Id="Path" Guid="{{path_component_guid}}" Win64="$(var.Win64)">
-                <File Id="Path" Source="{{app_exe_source}}" KeyPath="yes" Checksum="yes"/>
+                <File Id="Path" Source="{{main_binary_path}}" KeyPath="yes" Checksum="yes"/>
                 {{#each file_associations as |association| ~}}
                 {{#each association.ext as |ext| ~}}
                 <ProgId Id="{{../../product_name}}.{{ext}}" Advertise="yes" Description="{{association.description}}">

crates/tauri-cli/config.schema.json

@@ -22,6 +22,13 @@
       ],
       "pattern": "^[^/\\:*?\"<>|]+$"
     },
+    "mainBinaryName": {
+      "description": "App main binary filename. Defaults to the name of your cargo crate.",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
     "version": {
       "description": "App version. It is a semver version number or a path to a `package.json` file containing the `version` field. If removed the version number from `Cargo.toml` is used.\n\n By default version 1.0 is used on Android.",
       "type": [

crates/tauri-cli/src/build.rs

@@ -9,7 +9,7 @@ use crate::{
     app_paths::tauri_dir,
     config::{get as get_config, ConfigHandle, FrontendDist},
   },
-  interface::{AppInterface, AppSettings, Interface},
+  interface::{AppInterface, Interface},
   ConfigValue, Result,
 };
 use anyhow::Context;
@@ -83,10 +83,9 @@ pub fn command(mut options: Options, verbosity: u8) -> Result<()> {
   let app_settings = interface.app_settings();
   let interface_options = options.clone().into();
 
-  let bin_path = app_settings.app_binary_path(&interface_options)?;
-  let out_dir = bin_path.parent().unwrap();
+  let out_dir = app_settings.out_dir(&interface_options)?;
 
-  interface.build(interface_options)?;
+  let bin_path = interface.build(interface_options)?;
 
   log::info!(action ="Built"; "application at: {}", tauri_utils::display_path(&bin_path));
 
@@ -100,7 +99,7 @@ pub fn command(mut options: Options, verbosity: u8) -> Result<()> {
       &interface,
       &app_settings,
       config_,
-      out_dir,
+      &out_dir,
     )?;
   }
 

crates/tauri-cli/src/bundle.rs

@@ -121,8 +121,7 @@ pub fn command(options: Options, verbosity: u8) -> crate::Result<()> {
   let app_settings = interface.app_settings();
   let interface_options = options.clone().into();
 
-  let bin_path = app_settings.app_binary_path(&interface_options)?;
-  let out_dir = bin_path.parent().unwrap();
+  let out_dir = app_settings.out_dir(&interface_options)?;
 
   bundle(
     &options,
@@ -131,7 +130,7 @@ pub fn command(options: Options, verbosity: u8) -> crate::Result<()> {
     &interface,
     &app_settings,
     config_,
-    out_dir,
+    &out_dir,
   )
 }
 

crates/tauri-cli/src/interface/mod.rs

@@ -55,10 +55,16 @@ pub trait AppSettings {
       tauri_utils::platform::target_triple()?
     };
 
+    let mut bins = self.get_binaries(&target)?;
+    if let Some(main_binary_name) = &config.main_binary_name {
+      let main = bins.iter_mut().find(|b| b.main()).context("no main bin?")?;
+      main.set_name(main_binary_name.to_owned());
+    }
+
     let mut settings_builder = SettingsBuilder::new()
       .package_settings(self.get_package_settings())
       .bundle_settings(self.get_bundle_settings(config, &enabled_features)?)
-      .binaries(self.get_binaries(&target)?)
+      .binaries(bins)
       .project_out_directory(out_dir)
       .target(target)
       .package_types(package_types);
@@ -91,7 +97,7 @@ pub trait Interface: Sized {
   fn new(config: &Config, target: Option<String>) -> crate::Result<Self>;
   fn app_settings(&self) -> Arc<Self::AppSettings>;
   fn env(&self) -> HashMap<&str, String>;
-  fn build(&mut self, options: Options) -> crate::Result<()>;
+  fn build(&mut self, options: Options) -> crate::Result<PathBuf>;
   fn dev<F: Fn(Option<i32>, ExitReason) + Send + Sync + 'static>(
     &mut self,
     options: Options,

crates/tauri-cli/src/interface/rust.rs

@@ -115,6 +115,7 @@ pub struct Rust {
   app_settings: Arc<RustAppSettings>,
   config_features: Vec<String>,
   available_targets: Option<Vec<RustupTarget>>,
+  main_binary_name: Option<String>,
 }
 
 impl Interface for Rust {
@@ -160,6 +161,7 @@ impl Interface for Rust {
     Ok(Self {
       app_settings: Arc::new(app_settings),
       config_features: config.build.features.clone().unwrap_or_default(),
+      main_binary_name: config.main_binary_name.clone(),
       available_targets: None,
     })
   }
@@ -168,14 +170,14 @@ impl Interface for Rust {
     self.app_settings.clone()
   }
 
-  fn build(&mut self, options: Options) -> crate::Result<()> {
+  fn build(&mut self, options: Options) -> crate::Result<PathBuf> {
     desktop::build(
       options,
       &self.app_settings,
       &mut self.available_targets,
       self.config_features.clone(),
-    )?;
-    Ok(())
+      self.main_binary_name.as_deref(),
+    )
   }
 
   fn dev<F: Fn(Option<i32>, ExitReason) + Send + Sync + 'static>(
@@ -498,6 +500,7 @@ impl Rust {
       &mut self.available_targets,
       self.config_features.clone(),
       &self.app_settings,
+      self.main_binary_name.clone(),
       on_exit,
     )
     .map(|c| Box::new(c) as Box<dyn DevProcess + Send>)
@@ -865,32 +868,30 @@ impl AppSettings for RustAppSettings {
     let bin_name = binaries
       .iter()
       .find(|x| x.main())
-      .expect("failed to find main binary")
+      .context("failed to find main binary, make sure you have a `package > default-run` in the Cargo.toml file")?
       .name();
 
     let out_dir = self
       .out_dir(options)
-      .with_context(|| "failed to get project out directory")?;
+      .context("failed to get project out directory")?;
 
-    let binary_extension: String = if self.target_triple.contains("windows") {
+    let ext = if self.target_triple.contains("windows") {
       "exe"
     } else {
       ""
-    }
-    .into();
+    };
 
-    Ok(out_dir.join(bin_name).with_extension(binary_extension))
+    Ok(out_dir.join(bin_name).with_extension(ext))
   }
 
   fn get_binaries(&self, target: &str) -> crate::Result<Vec<BundleBinary>> {
     let mut binaries: Vec<BundleBinary> = vec![];
 
-    let binary_extension: String = if target.contains("windows") {
+    let ext = if target.contains("windows") {
       ".exe"
     } else {
       ""
-    }
-    .into();
+    };
 
     if let Some(bins) = &self.cargo_settings.bin {
       let default_run = self
@@ -899,9 +900,8 @@ impl AppSettings for RustAppSettings {
         .clone()
         .unwrap_or_default();
       for bin in bins {
-        let name = format!("{}{}", bin.name, binary_extension);
-        let is_main =
-          bin.name == self.cargo_package_settings.name || bin.name.as_str() == default_run;
+        let name = format!("{}{}", bin.name, ext);
+        let is_main = bin.name == self.cargo_package_settings.name || bin.name == default_run;
         binaries.push(BundleBinary::with_path(name, is_main, bin.path.clone()))
       }
     }
@@ -912,12 +912,13 @@ impl AppSettings for RustAppSettings {
       for entry in fs_bins {
         let path = entry?.path();
         if let Some(name) = path.file_stem() {
+          // see https://github.com/tauri-apps/tauri/pull/10977#discussion_r1759742414
           let bin_exists = binaries.iter().any(|bin| {
             bin.name() == name || path.ends_with(bin.src_path().unwrap_or(&"".to_string()))
           });
           if !bin_exists {
             binaries.push(BundleBinary::new(
-              format!("{}{}", name.to_string_lossy(), &binary_extension),
+              format!("{}{}", name.to_string_lossy(), ext),
               false,
             ))
           }
@@ -927,16 +928,13 @@ impl AppSettings for RustAppSettings {
 
     if let Some(default_run) = self.package_settings.default_run.as_ref() {
       if !binaries.iter_mut().any(|bin| bin.name() == default_run) {
-        binaries.push(BundleBinary::new(
-          format!("{}{}", default_run, binary_extension),
-          true,
-        ));
+        binaries.push(BundleBinary::new(format!("{}{}", default_run, ext), true));
       }
     }
 
     match binaries.len() {
       0 => binaries.push(BundleBinary::new(
-        format!("{}{}", self.cargo_package_settings.name, &binary_extension),
+        format!("{}{}", self.cargo_package_settings.name, ext),
         true,
       )),
       1 => binaries.get_mut(0).unwrap().set_main(true),

crates/tauri-cli/src/interface/rust/desktop.rs

@@ -8,7 +8,9 @@ use crate::CommandExt;
 use anyhow::Context;
 use shared_child::SharedChild;
 use std::{
+  fs,
   io::{BufReader, ErrorKind, Write},
+  path::PathBuf,
   process::{Command, ExitStatus, Stdio},
   sync::{
     atomic::{AtomicBool, Ordering},
@@ -64,6 +66,7 @@ pub fn run_dev<F: Fn(Option<i32>, ExitReason) + Send + Sync + 'static>(
   available_targets: &mut Option<Vec<RustupTarget>>,
   config_features: Vec<String>,
   app_settings: &RustAppSettings,
+  main_binary_name: Option<String>,
   on_exit: F,
 ) -> crate::Result<impl DevProcess> {
   let bin_path = app_settings.app_binary_path(&options)?;
@@ -79,6 +82,9 @@ pub fn run_dev<F: Fn(Option<i32>, ExitReason) + Send + Sync + 'static>(
     config_features,
     move |status, reason| {
       if status == Some(0) {
+        let main_binary_name = main_binary_name.as_deref();
+        let bin_path = rename_app(bin_path, main_binary_name).expect("failed to rename app");
+
         let mut app = Command::new(bin_path);
         app.stdout(os_pipe::dup_stdout().unwrap());
         app.stderr(os_pipe::dup_stderr().unwrap());
@@ -119,18 +125,19 @@ pub fn build(
   app_settings: &RustAppSettings,
   available_targets: &mut Option<Vec<RustupTarget>>,
   config_features: Vec<String>,
-) -> crate::Result<()> {
+  main_binary_name: Option<&str>,
+) -> crate::Result<PathBuf> {
+  let out_dir = app_settings.out_dir(&options)?;
   let bin_path = app_settings.app_binary_path(&options)?;
-  let out_dir = bin_path.parent().unwrap();
-
-  let bin_name = bin_path.file_stem().unwrap();
 
   if !std::env::var("STATIC_VCRUNTIME").map_or(false, |v| v == "false") {
     std::env::set_var("STATIC_VCRUNTIME", "true");
   }
 
   if options.target == Some("universal-apple-darwin".into()) {
-    std::fs::create_dir_all(out_dir).with_context(|| "failed to create project out directory")?;
+    std::fs::create_dir_all(&out_dir).with_context(|| "failed to create project out directory")?;
+
+    let bin_name = bin_path.file_stem().unwrap();
 
     let mut lipo_cmd = Command::new("lipo");
     lipo_cmd
@@ -162,7 +169,7 @@ pub fn build(
       .with_context(|| "failed to build app")?;
   }
 
-  Ok(())
+  rename_app(bin_path, main_binary_name)
 }
 
 fn build_dev_app<F: FnOnce(Option<i32>, ExitReason) + Send + 'static>(
@@ -363,6 +370,25 @@ fn validate_target(
   Ok(())
 }
 
+fn rename_app(bin_path: PathBuf, main_binary_name: Option<&str>) -> crate::Result<PathBuf> {
+  if let Some(main_binary_name) = main_binary_name {
+    let new_path = bin_path
+      .with_file_name(main_binary_name)
+      .with_extension(bin_path.extension().unwrap_or_default());
+
+    fs::rename(&bin_path, &new_path).with_context(|| {
+      format!(
+        "failed to rename `{}` to `{}`",
+        tauri_utils::display_path(bin_path),
+        tauri_utils::display_path(&new_path),
+      )
+    })?;
+    Ok(new_path)
+  } else {
+    Ok(bin_path)
+  }
+}
+
 // taken from https://github.com/rust-lang/cargo/blob/78b10d4e611ab0721fc3aeaf0edd5dd8f4fdc372/src/cargo/core/shell.rs#L514
 #[cfg(unix)]
 mod terminal {

crates/tauri-cli/src/migrate/migrations/v1/config.rs

@@ -158,7 +158,9 @@ fn process_package_metadata(config: &mut Map<String, Value>) {
             .map(|v| (v, "product-name"))
         })
       {
-        config.insert(key.into(), product_name);
+        config.insert(key.into(), product_name.clone());
+        // keep main binary name unchanged
+        config.insert("mainBinaryName".into(), product_name);
       }
 
       if let Some(version) = package_config.remove("version") {
@@ -872,6 +874,10 @@ mod test {
 
     // app information
     assert_eq!(migrated["productName"], original["package"]["productName"]);
+    assert_eq!(
+      migrated["mainBinaryName"],
+      original["package"]["productName"]
+    );
     assert_eq!(migrated["version"], original["package"]["version"]);
     assert_eq!(
       migrated["identifier"],

crates/tauri-cli/src/mobile/android/build.rs

@@ -13,7 +13,7 @@ use crate::{
     config::{get as get_tauri_config, ConfigHandle},
     flock,
   },
-  interface::{AppInterface, AppSettings, Interface, Options as InterfaceOptions},
+  interface::{AppInterface, Interface, Options as InterfaceOptions},
   mobile::{write_options, CliOptions},
   ConfigValue, Result,
 };
@@ -191,8 +191,7 @@ fn run_build(
   };
 
   let app_settings = interface.app_settings();
-  let bin_path = app_settings.app_binary_path(&interface_options)?;
-  let out_dir = bin_path.parent().unwrap();
+  let out_dir = app_settings.out_dir(&interface_options)?;
   let _lock = flock::open_rw(out_dir.join("lock").with_extension("android"), "Android")?;
 
   let cli_options = CliOptions {

crates/tauri-cli/src/mobile/android/dev.rs

@@ -13,7 +13,7 @@ use crate::{
     config::{get as get_tauri_config, ConfigHandle},
     flock,
   },
-  interface::{AppInterface, AppSettings, Interface, MobileOptions, Options as InterfaceOptions},
+  interface::{AppInterface, Interface, MobileOptions, Options as InterfaceOptions},
   mobile::{write_options, CliOptions, DevChild, DevProcess, TargetDevice},
   ConfigValue, Result,
 };
@@ -186,8 +186,7 @@ fn run_dev(
   };
 
   let app_settings = interface.app_settings();
-  let bin_path = app_settings.app_binary_path(&interface_options)?;
-  let out_dir = bin_path.parent().unwrap();
+  let out_dir = app_settings.out_dir(&interface_options)?;
   let _lock = flock::open_rw(out_dir.join("lock").with_extension("android"), "Android")?;
 
   configure_cargo(&mut env, config)?;

crates/tauri-cli/src/mobile/ios/build.rs

@@ -271,12 +271,11 @@ fn run_build(
   crate::build::setup(&interface, &mut build_options, tauri_config.clone(), true)?;
 
   let app_settings = interface.app_settings();
-  let bin_path = app_settings.app_binary_path(&InterfaceOptions {
+  let out_dir = app_settings.out_dir(&InterfaceOptions {
     debug: build_options.debug,
     target: build_options.target.clone(),
     ..Default::default()
   })?;
-  let out_dir = bin_path.parent().unwrap();
   let _lock = flock::open_rw(out_dir.join("lock").with_extension("ios"), "iOS")?;
 
   let cli_options = CliOptions {

crates/tauri-cli/src/mobile/ios/dev.rs

@@ -13,7 +13,7 @@ use crate::{
     config::{get as get_tauri_config, reload as reload_config, ConfigHandle},
     flock,
   },
-  interface::{AppInterface, AppSettings, Interface, MobileOptions, Options as InterfaceOptions},
+  interface::{AppInterface, Interface, MobileOptions, Options as InterfaceOptions},
   mobile::{write_options, CliOptions, DevChild, DevProcess},
   ConfigValue, Result,
 };
@@ -377,12 +377,11 @@ fn run_dev(
   crate::dev::setup(&interface, &mut dev_options, tauri_config.clone())?;
 
   let app_settings = interface.app_settings();
-  let bin_path = app_settings.app_binary_path(&InterfaceOptions {
+  let out_dir = app_settings.out_dir(&InterfaceOptions {
     debug: !dev_options.release_mode,
     target: dev_options.target.clone(),
     ..Default::default()
   })?;
-  let out_dir = bin_path.parent().unwrap();
   let _lock = flock::open_rw(out_dir.join("lock").with_extension("ios"), "iOS")?;
 
   let set_host = options.host.is_some();

crates/tauri-cli/src/mobile/ios/xcode_script.rs

@@ -5,7 +5,7 @@
 use super::{ensure_init, env, get_app, get_config, read_options, MobileTarget};
 use crate::{
   helpers::config::get as get_tauri_config,
-  interface::{AppInterface, AppSettings, Interface, Options as InterfaceOptions},
+  interface::{AppInterface, Interface, Options as InterfaceOptions},
   mobile::ios::LIB_OUTPUT_FILE_NAME,
   Result,
 };
@@ -215,14 +215,11 @@ pub fn command(options: Options) -> Result<()> {
       target_env,
     )?;
 
-    let bin_path = interface
-      .app_settings()
-      .app_binary_path(&InterfaceOptions {
+    let out_dir = interface.app_settings().out_dir(&InterfaceOptions {
       debug: matches!(profile, Profile::Debug),
       target: Some(rust_triple.into()),
       ..Default::default()
     })?;
-    let out_dir = bin_path.parent().unwrap();
 
     let lib_path = out_dir.join(format!("lib{}.a", config.app().lib_name()));
     if !lib_path.exists() {

crates/tauri-cli/src/mobile/mod.rs

@@ -282,14 +282,13 @@ pub fn get_app(target: Target, config: &TauriConfig, interface: &AppInterface) -
   App::from_raw(tauri_dir().to_path_buf(), raw)
     .unwrap()
     .with_target_dir_resolver(move |target, profile| {
-      let bin_path = app_settings
-        .app_binary_path(&InterfaceOptions {
+      app_settings
+        .out_dir(&InterfaceOptions {
           debug: matches!(profile, Profile::Debug),
           target: Some(target.into()),
           ..Default::default()
         })
-        .expect("failed to resolve target directory");
-      bin_path.parent().unwrap().to_path_buf()
+        .expect("failed to resolve target directory")
     })
 }
 

crates/tauri-schema-generator/schemas/config.schema.json

@@ -22,6 +22,13 @@
       ],
       "pattern": "^[^/\\:*?\"<>|]+$"
     },
+    "mainBinaryName": {
+      "description": "App main binary filename. Defaults to the name of your cargo crate.",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
     "version": {
       "description": "App version. It is a semver version number or a path to a `package.json` file containing the `version` field. If removed the version number from `Cargo.toml` is used.\n\n By default version 1.0 is used on Android.",
       "type": [

crates/tauri-utils/src/config.rs

@@ -2242,6 +2242,9 @@ pub struct Config {
   #[serde(alias = "product-name")]
   #[cfg_attr(feature = "schema", validate(regex(pattern = "^[^/\\:*?\"<>|]+$")))]
   pub product_name: Option<String>,
+  /// App main binary filename. Defaults to the name of your cargo crate.
+  #[serde(alias = "main-binary-name")]
+  pub main_binary_name: Option<String>,
   /// App version. It is a semver version number or a path to a `package.json` file containing the `version` field. If removed the version number from `Cargo.toml` is used.
   ///
   /// By default version 1.0 is used on Android.
@@ -2836,6 +2839,7 @@ mod build {
     fn to_tokens(&self, tokens: &mut TokenStream) {
       let schema = quote!(None);
       let product_name = opt_str_lit(self.product_name.as_ref());
+      let main_binary_name = opt_str_lit(self.main_binary_name.as_ref());
       let version = opt_str_lit(self.version.as_ref());
       let identifier = str_lit(&self.identifier);
       let app = &self.app;
@@ -2848,6 +2852,7 @@ mod build {
         ::tauri::utils::config::Config,
         schema,
         product_name,
+        main_binary_name,
         version,
         identifier,
         app,

crates/tauri-utils/src/platform.rs

@@ -312,7 +312,7 @@ fn resource_dir_from<P: AsRef<std::path::Path>>(
     res = if curr_dir.ends_with("/data/usr/bin") {
       // running from the deb bundle dir
       exe_dir
-        .join(format!("../lib/{}", package_info.crate_name))
+        .join(format!("../lib/{}", package_info.name))
         .canonicalize()
         .map_err(Into::into)
     } else if let Some(appdir) = &env.appdir {
@@ -320,14 +320,11 @@ fn resource_dir_from<P: AsRef<std::path::Path>>(
       Ok(PathBuf::from(format!(
         "{}/usr/lib/{}",
         appdir.display(),
-        package_info.crate_name
+        package_info.name
       )))
     } else {
       // running bundle
-      Ok(PathBuf::from(format!(
-        "/usr/lib/{}",
-        package_info.crate_name
-      )))
+      Ok(PathBuf::from(format!("/usr/lib/{}", package_info.name)))
     };
   }
 

crates/tauri/src/test/mod.rs

@@ -110,6 +110,7 @@ pub fn mock_context<R: Runtime, A: Assets<R>>(assets: A) -> crate::Context<R> {
     config: Config {
       schema: None,
       product_name: Default::default(),
+      main_binary_name: Default::default(),
       version: Default::default(),
       identifier: Default::default(),
       app: AppConfig {

crates/tauri/src/window/mod.rs

@@ -1980,7 +1980,7 @@ tauri::Builder::default()
       .set_progress_bar(crate::runtime::ProgressBarState {
         status: progress_state.status,
         progress: progress_state.progress,
-        desktop_filename: Some(format!("{}.desktop", self.package_info().crate_name)),
+        desktop_filename: Some(format!("{}.desktop", self.package_info().name)),
       })
       .map_err(Into::into)
   }