feat: 添加一些实用的扩展方法

src-tauri/Cargo.lock

@@ -267,6 +267,7 @@ checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 name = "bilibili-video-downloader"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "serde",
  "serde_json",
  "specta",

src-tauri/Cargo.toml

@@ -27,6 +27,8 @@ specta = { version = "=2.0.0-rc.20", features = ["serde_json"] }
 tauri-specta = { version = "=2.0.0-rc.20", features = ["derive", "typescript"] }
 specta-typescript = { version = "=0.0.7" }
 
+anyhow = { version = "1.0.98" }
+
 [profile.release]
 strip = true
 lto = true

src-tauri/src/extensions.rs

@@ -0,0 +1,20 @@
+pub trait AnyhowErrorToStringChain {
+    /// 将 `anyhow::Error` 转换为chain格式  
+    /// # Example  
+    /// 0: error message\
+    /// 1: error message\
+    /// 2: error message
+    fn to_string_chain(&self) -> String;
+}
+
+impl AnyhowErrorToStringChain for anyhow::Error {
+    fn to_string_chain(&self) -> String {
+        use std::fmt::Write;
+        self.chain()
+            .enumerate()
+            .fold(String::new(), |mut output, (i, e)| {
+                let _ = writeln!(output, "{i}: {e}");
+                output
+            })
+    }
+}

src-tauri/src/lib.rs

@@ -1,4 +1,5 @@
 mod commands;
+mod extensions;
 mod utils;
 
 use tauri::Wry;