feat(cli): hotreload support for frontend static files, closes #2173 (#5256)

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

Author: amrbashir

.changes/cli-static-files-hot-reload.md

@@ -0,0 +1,5 @@
+---
+"cli.rs": "minor"
+---
+
+Hot-reload the frontend when `tauri.conf.json > build > devPath` points to a directory.

.changes/utils-mimetype.md

@@ -0,0 +1,5 @@
+---
+"tauri-utils": "patch"
+---
+
+Add `mime_type` module.

core/tauri-runtime/Cargo.toml

@@ -30,7 +30,6 @@ tauri-utils = { version = "1.1.1", path = "../tauri-utils" }
 uuid = { version = "1", features = [ "v4" ] }
 http = "0.2.4"
 http-range = "0.1.4"
-infer = "0.7"
 raw-window-handle = "0.5"
 rand = "0.8"
 

core/tauri-runtime/src/http/mod.rs

@@ -3,16 +3,16 @@
 // SPDX-License-Identifier: MIT
 
 // custom wry types
-mod mime_type;
 mod request;
 mod response;
 
 pub use self::{
-  mime_type::MimeType,
   request::{Request, RequestParts},
   response::{Builder as ResponseBuilder, Response, ResponseParts},
 };
 
+pub use tauri_utils::mime_type::MimeType;
+
 // re-expose default http types
 pub use http::{header, method, status, uri::InvalidUri, version, Uri};
 

core/tauri-utils/Cargo.toml

@@ -35,6 +35,7 @@ glob = { version = "0.3.0", optional = true }
 walkdir = { version = "2", optional = true }
 memchr = "2.4"
 semver = "1"
+infer = "0.7"
 
 [target."cfg(target_os = \"linux\")".dependencies]
 heck = "0.4"

core/tauri-utils/src/lib.rs

@@ -14,6 +14,7 @@ pub mod assets;
 pub mod config;
 pub mod html;
 pub mod io;
+pub mod mime_type;
 pub mod platform;
 /// Prepare application resources and sidecars.
 #[cfg(feature = "resources")]

core/tauri-runtime/src/http/mime_type.rs core/tauri-utils/src/mime_type.rscore/tauri-runtime/src/http/mime_type.rs renamed to core/tauri-utils/src/mime_type.rs

@@ -2,11 +2,14 @@
 // SPDX-License-Identifier: Apache-2.0
 // SPDX-License-Identifier: MIT
 
+//! Determine a mime type from a URI or file contents.
+
 use std::fmt;
 
 const MIMETYPE_PLAIN: &str = "text/plain";
 
 /// [Web Compatible MimeTypes](https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types#important_mime_types_for_web_developers)
+#[allow(missing_docs)]
 pub enum MimeType {
   Css,
   Csv,