feat: Add option to generate default permissions for inlined plugins (#10559)

* feat: Add option to allow all commands by default

* option to use a list of permissions, move logic to tauri-build

* fix plugin

* add utils change file

---------

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

.changes/allow-commands-by-default.md

@@ -0,0 +1,5 @@
+---
+"tauri-build": patch:feat
+---
+
+Added `InlinedPlugin::default_permission` to autogenerate the default permission of an inlined plugin.

.changes/utils-autogenerated-command-return-list.md

@@ -0,0 +1,5 @@
+---
+"tauri-utils": patch:enhance
+---
+
+Return autogenerated permissions from `autogenerate_command_permissions`.

core/tauri-build/src/acl.rs

@@ -42,6 +42,19 @@ const ACL_MANIFESTS_FILE_NAME: &str = "acl-manifests.json";
 pub struct InlinedPlugin {
   commands: &'static [&'static str],
   permissions_path_pattern: Option<&'static str>,
+  default: Option<DefaultPermissionRule>,
+}
+
+/// Variants of a generated default permission that can be used on an [`InlinedPlugin`].
+#[derive(Debug)]
+pub enum DefaultPermissionRule {
+  /// Allow all commands from [`InlinedPlugin::commands`].
+  AllowAllCommands,
+  /// Allow the given list of permissions.
+  ///
+  /// Note that the list refers to permissions instead of command names,
+  /// so for example a command called `execute` would need to be allowed as `allow-execute`.
+  Allow(Vec<String>),
 }
 
 impl InlinedPlugin {
@@ -65,6 +78,14 @@ impl InlinedPlugin {
     self.permissions_path_pattern.replace(pattern);
     self
   }
+
+  /// Creates a default permission for the plugin using the given rule.
+  ///
+  /// Alternatively you can pull a permission in the filesystem in the permissions directory, see [`Self::permissions_path_pattern`].
+  pub fn default_permission(mut self, default: DefaultPermissionRule) -> Self {
+    self.default.replace(default);
+    self
+  }
 }
 
 /// Tauri application permission manifest.
@@ -337,12 +358,35 @@ pub fn inline_plugins(
     let mut permission_files = if plugin.commands.is_empty() {
       Vec::new()
     } else {
-      tauri_utils::acl::build::autogenerate_command_permissions(
+      let autogenerated = tauri_utils::acl::build::autogenerate_command_permissions(
         &plugin_out_dir,
         plugin.commands,
         "",
         false,
       );
+
+      let default_permissions = plugin.default.map(|default| match default {
+        DefaultPermissionRule::AllowAllCommands => autogenerated.allowed,
+        DefaultPermissionRule::Allow(permissions) => permissions,
+      });
+      if let Some(default_permissions) = default_permissions {
+        let default_permission_toml = format!(
+          r###"# Automatically generated - DO NOT EDIT!
+[default]
+permissions = [{default_permissions}]
+"###,
+          default_permissions = default_permissions
+            .iter()
+            .map(|p| format!("\"{p}\""))
+            .collect::<Vec<String>>()
+            .join(",")
+        );
+
+        let default_permission_toml_path = plugin_out_dir.join("default.toml");
+
+        write_if_changed(&default_permission_toml, &default_permission_toml_path);
+      }
+
       tauri_utils::acl::build::define_permissions(
         &plugin_out_dir.join("*").to_string_lossy(),
         name,
@@ -384,6 +428,12 @@ pub fn inline_plugins(
   Ok(acl_manifests)
 }
 
+fn write_if_changed(content: &str, path: &Path) {
+  if content != read_to_string(path).unwrap_or_default() {
+    std::fs::write(path, content).unwrap_or_else(|_| panic!("unable to autogenerate {path:?}"));
+  }
+}
+
 pub fn app_manifest_permissions(
   out_dir: &Path,
   manifest: AppManifest,

core/tauri-build/src/lib.rs

@@ -373,6 +373,17 @@ impl Attributes {
     self
   }
 
+  /// Adds the given list of plugins to the list of inlined plugins (a plugin that is part of your application).
+  ///
+  /// See [`InlinedPlugin`] for more information.
+  pub fn plugins<I>(mut self, plugins: I) -> Self
+  where
+    I: IntoIterator<Item = (&'static str, InlinedPlugin)>,
+  {
+    self.inlined_plugins.extend(plugins);
+    self
+  }
+
   /// Sets the application manifest for the Access Control List.
   ///
   /// See [`AppManifest`] for more information.

core/tauri-utils/src/acl/build.rs

@@ -388,13 +388,21 @@ fn parse_permissions(paths: Vec<PathBuf>) -> Result<Vec<PermissionFile>, Error>
   Ok(permissions)
 }
 
+/// Permissions that are generated from commands using [`autogenerate_command_permissions`].
+pub struct AutogeneratedPermissions {
+  /// The allow permissions generated from commands.
+  pub allowed: Vec<String>,
+  /// The deny permissions generated from commands.
+  pub denied: Vec<String>,
+}
+
 /// Autogenerate permission files for a list of commands.
 pub fn autogenerate_command_permissions(
   path: &Path,
   commands: &[&str],
   license_header: &str,
   schema_ref: bool,
-) {
+) -> AutogeneratedPermissions {
   if !path.exists() {
     create_dir_all(path).expect("unable to create autogenerated commands dir");
   }
@@ -418,8 +426,14 @@ pub fn autogenerate_command_permissions(
     "".to_string()
   };
 
+  let mut autogenerated = AutogeneratedPermissions {
+    allowed: Vec::new(),
+    denied: Vec::new(),
+  };
+
   for command in commands {
     let slugified_command = command.replace('_', "-");
+
     let toml = format!(
       r###"{license_header}# Automatically generated - DO NOT EDIT!
 {schema_entry}
@@ -436,9 +450,21 @@ commands.deny = ["{command}"]
     );
 
     let out_path = path.join(format!("{command}.toml"));
-    if toml != read_to_string(&out_path).unwrap_or_default() {
+    write_if_changed(&toml, &out_path);
-      std::fs::write(out_path, toml)
+
-        .unwrap_or_else(|_| panic!("unable to autogenerate ${command}.toml"));
+    autogenerated
+      .allowed
+      .push(format!("allow-{slugified_command}"));
+    autogenerated
+      .denied
+      .push(format!("deny-{slugified_command}"));
   }
+
+  autogenerated
+}
+
+fn write_if_changed(content: &str, path: &Path) {
+  if content != read_to_string(path).unwrap_or_default() {
+    std::fs::write(path, content).unwrap_or_else(|_| panic!("unable to autogenerate {path:?}"));
   }
 }