Improve error reports somewhat

src/error.rs

@@ -16,6 +16,7 @@ pub type Result<T> = std::result::Result<T, Error>;
 
 #[derive(Debug, Error, Diagnostic)]
 pub enum Error {
+    #[diagnostic(code(nenv::web))]
     #[error("Failed to call nodejs.com api.")]
     Web(
         #[from]
@@ -24,6 +25,7 @@ pub enum Error {
         ApiError,
     ),
 
+    #[diagnostic(code(nenv::extract))]
     #[error("The node archive could not be extracted")]
     Extract(
         #[from]
@@ -32,14 +34,15 @@ pub enum Error {
         ExtractError,
     ),
 
+    #[diagnostic(code(nenv::config))]
     #[error("The config file could not be loaded")]
     Config(
         #[from]
-        #[source]
         #[diagnostic_source]
         ConfigError,
     ),
 
+    #[diagnostic(code(nenv::mapper))]
     #[error("Mapping failed")]
     Mapper(
         #[from]
@@ -48,6 +51,7 @@ pub enum Error {
         MapperError,
     ),
 
+    #[diagnostic(code(nenv::version))]
     #[error("The passed version is invalid")]
     Version(
         #[from]
@@ -55,9 +59,11 @@ pub enum Error {
         VersionError,
     ),
 
+    #[diagnostic(code(nenv::json))]
     #[error("Failed to work with json")]
     Json(#[from] serde_json::Error),
 
+    #[diagnostic(code(nenv::io))]
     #[error("Error during IO operation")]
     Io(#[from] io::Error),
 }

src/main.rs

@@ -7,6 +7,7 @@ mod args;
 
 #[tokio::main(flavor = "current_thread")]
 async fn main() -> miette::Result<()> {
+    miette::set_panic_hook();
     let args: Args = Args::parse();
 
     match args.commmand {

src/repository/config.rs

@@ -1,6 +1,6 @@
 use std::io;
 
-use miette::Diagnostic;
+use miette::{Diagnostic, NamedSource, SourceSpan};
 use serde::{Deserialize, Serialize};
 use thiserror::Error;
 use tokio::fs;
@@ -20,18 +20,27 @@ pub type ConfigResult<T> = Result<T, ConfigError>;
 
 #[derive(Error, Diagnostic, Debug)]
 pub enum ConfigError {
+    #[diagnostic(code(nenv::config::io))]
     #[error("IO Error: {0}")]
     Io(
         #[from]
         #[source]
         io::Error,
     ),
-    #[error("Failed to parse config file: {0}")]
+    #[diagnostic(code(nenv::config::parse))]
-    Parse(
+    #[error("Failed to parse config file")]
-        #[from]
+    #[diagnostic_source]
+    Parse {
+        #[source_code]
+        src: NamedSource,
+
+        #[label]
+        pos: Option<(usize, usize)>,
+
         #[source]
-        toml::de::Error,
+        e: toml::de::Error,
-    ),
+    },
+    #[diagnostic(code(nenv::config::write))]
     #[error("Failed to serialize config file: {0}")]
     Serialize(
         #[from]
@@ -62,7 +71,11 @@ impl Config {
             Ok(cfg)
         } else {
             let cfg_string = fs::read_to_string(&*CFG_FILE_PATH).await?;
-            let cfg = toml::from_str(&cfg_string)?;
+            let cfg = toml::from_str(&cfg_string).map_err(|e| ConfigError::Parse {
+                src: NamedSource::new("config.toml", cfg_string),
+                pos: e.line_col(),
+                e,
+            })?;
 
             Ok(cfg)
         }