switched err-derive for snafu

Cargo.lock

@@ -371,20 +371,6 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
-[[package]]
-name = "err-derive"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c34a887c8df3ed90498c1c437ce21f211c8e27672921a8ffa293cb8d6d4caa9e"
-dependencies = [
- "proc-macro-error",
- "proc-macro2",
- "quote",
- "rustversion",
- "syn 1.0.109",
- "synstructure",
-]
-
 [[package]]
 name = "event-listener"
 version = "5.2.0"
@@ -1185,7 +1171,6 @@ version = "1.1.0"
 dependencies = [
  "async-channel",
  "config",
- "err-derive",
  "futures-core",
  "futures-util",
  "gilrs",
@@ -1690,12 +1675,6 @@ dependencies = [
  "semver",
 ]
 
-[[package]]
-name = "rustversion"
-version = "1.0.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "80af6f9131f277a45a3fba6ce8e2258037bb0477a67e610d3c1fe046ab31de47"
-
 [[package]]
 name = "ryu"
 version = "1.0.17"
@@ -1858,18 +1837,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "synstructure"
-version = "0.12.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f36bdaa60a83aca3921b5259d5400cbf5e90fc51931376a9bd4a0eb79aa7210f"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 1.0.109",
- "unicode-xid",
-]
-
 [[package]]
 name = "system-deps"
 version = "6.2.1"
@@ -2196,12 +2163,6 @@ version = "1.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d4c87d22b6e3f4a18d4d40ef354e97c90fcb14dd91d7dc0aa9d8a1172ebf7202"
 
-[[package]]
-name = "unicode-xid"
-version = "0.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f962df74c8c05a667b5ee8bcf162993134c104e96440b663c8daa176dc772d8c"
-
 [[package]]
 name = "url"
 version = "2.5.0"

Cargo.toml

@@ -11,7 +11,6 @@ tracker-state-debug = []
 [dependencies]
 async-channel = "2.2.0"
 config = "0.14.0"
-err-derive = "0.3.1"
 futures-core = "0.3.30"
 futures-util = { version = "0.3.30", features = ["tokio-io"] }
 gilrs = "0.10.6"

src/config.rs

@@ -1,5 +1,6 @@
 use config::{Config, FileFormat};
-use err_derive::Error;
+use gtk::cairo::IoError;
+use snafu::prelude::*;
 use log::{error, info};
 use serde::{Deserialize, Serialize};
 use std::fs::File;
@@ -29,27 +30,25 @@ impl Default for AppConfig {
 }
 
 pub fn load_config() -> AppConfig {
-    let settings = Config::builder()
+    Config::builder()
         .add_source(config::File::new("./settings.toml", FileFormat::Toml))
-        .build();
-
-    settings
+        .build()
         .and_then(|val| val.try_deserialize())
         .unwrap_or_default()
 }
 
-#[derive(Error, Debug)]
+#[derive(Debug, Snafu)]
 pub enum SaveConfigError {
-    #[error(display = "Could not serialize app state: {:?}", _0)]
-    SerdeError(#[cause] toml::ser::Error),
-    #[error(display = "Could not write app state to file: {:?}", _0)]
-    IoError(#[cause] std::io::Error),
+    #[snafu(display("Could not serialize app state: {source}"))]
+    SerdeError {source: toml::ser::Error },
+    #[snafu(display("Could not write app state to file: {path}"))]
+    IoError {source: std::io::Error, path: String },
 }
 
 pub fn save_config(config: &AppConfig) -> Result<(), SaveConfigError> {
-    let toml_str = toml::to_string(&config)?;
-    let mut file = File::create("./settings.toml")?;
-    file.write_all(toml_str.as_bytes())?;
+    let toml_str = toml::to_string(&config).context(SerdeSnafu)?;
+    let mut file = File::create("./settings.toml").context(IoSnafu {path: "./settings.toml" })?;
+    file.write_all(toml_str.as_bytes()).context(IoSnafu {path: "./settings.toml" })?;
     info!("Config file saved successfully");
     Ok(())
 }