split up modules into subfiles

crates/app/src/error_reporting.rs

@@ -0,0 +1,37 @@
+use std::process;
+
+use ron::error::Position;
+
+pub fn report_serde_json_err(src: &str, err: serde_json::Error) -> ! {
+    report_serde_err(src, err.line(), err.column(), err.to_string())
+}
+
+pub fn report_serde_ron_err(src: &str, err: ron::error::SpannedError) -> ! {
+    let Position { line, col } = err.position;
+    report_serde_err(src, line, col, err.to_string())
+}
+
+pub fn report_serde_err(src: &str, line: usize, col: usize, msg: String) -> ! {
+    use ariadne::{Label, Report, Source};
+    let offset = try_reconstruct_loc(src, line, col);
+
+    Report::build(ariadne::ReportKind::Error, "test", offset)
+        .with_label(Label::new(("test", offset..offset)).with_message("Something went wrong here!"))
+        .with_message(msg)
+        .with_note("We'd like to give better errors, but serde errors are horrible to work with...")
+        .finish()
+        .print(("test", Source::from(src)))
+        .unwrap();
+    process::exit(1);
+}
+fn try_reconstruct_loc(src: &str, line_nr: usize, col_nr: usize) -> usize {
+    let (line_nr, col_nr) = (line_nr - 1, col_nr - 1);
+
+    src.lines()
+        .enumerate()
+        .fold(0, |acc, (i, line)| match i.cmp(&line_nr) {
+            std::cmp::Ordering::Less => acc + line.len() + 1,
+            std::cmp::Ordering::Equal => acc + col_nr,
+            std::cmp::Ordering::Greater => acc,
+        })
+}