crates/app/src/config/config_file.rs

@@ -5,7 +5,9 @@ use std::{
 
 use serde::{Deserialize, Serialize};
 
-use super::error::Config;
+use crate::error_reporting::{report_serde_json_err, report_serde_ron_err};
+
+use super::error::{self, Config};
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Configs {
@@ -40,14 +42,20 @@ pub(super) fn find_config_file() -> Result<PathBuf, Config> {
 }
 
 impl Configs {
-    pub fn read(p: PathBuf) -> Result<Self, Config> {
+    pub fn read(p: PathBuf) -> Result<Self, error::Config> {
         match p
             .extension()
             .map(|v| v.to_str().expect("config path to be UTF-8"))
         {
-            Some("ron") => Ok(serde_json::from_str(&fs::read_to_string(p)?)?),
-            Some("json") => Ok(ron::from_str(&fs::read_to_string(p)?)?),
-            e => Err(Config::UnknownExtension(e.map(str::to_owned))),
+            Some("ron") => {
+                let f = fs::read_to_string(p)?;
+                ron::from_str(&f).or_else(|e| report_serde_ron_err(&f, &e))
+            }
+            Some("json") => {
+                let f = fs::read_to_string(p)?;
+                serde_json::from_str(&f).or_else(|e| report_serde_json_err(&f, &e))
+            }
+            e => Err(error::Config::UnknownExtension(e.map(str::to_owned))),
         }
     }
 }

crates/app/src/error_reporting.rs

@@ -25,7 +25,7 @@ fn report_serde_err(src: &str, line: usize, col: usize, msg: String) -> ! {
         .finish()
         .eprint(("test", Source::from(src)))
         .expect("writing error to stderr failed");
-    process::exit(1);
+    process::exit(1)
 }
 
 /// Reconstruct a byte offset from the line + column numbers typical from serde crates

testfiles/config.json

@@ -0,0 +1,4 @@
+{
+  "example_value": "42",
+  "no_startup_message": true
+}

testfiles/config.ron

@@ -0,0 +1,4 @@
+(
+	example_value: 42
+	no_startup_message: false,
+)

testfiles/test.owo

@@ -1 +1,4 @@
-42
+generator | {
+	foo,
+	bar
+} |