mirror of
https://github.com/tstack/lnav
synced 2024-11-01 21:40:34 +00:00
47 lines
1.4 KiB
Markdown
47 lines
1.4 KiB
Markdown
|
---
|
||
|
|
layout: post
|
||
|
|
title: Pretty error messages
|
||
|
|
excerpt: Error message improvements
|
||
|
|
---
|
||
|
|
|
||
|
|
*(This change will be in the upcoming v0.11.0 release)*
|
||
|
|
|
||
|
|
Taking a page from compilers like rustc, I've spent some time
|
||
|
|
improving error messages to make them look nicer and be more
|
||
|
|
helpful. Fortunately, SQLite has improved their error reporting
|
||
|
|
as well by adding
|
||
|
|
[sqlite3_error_offset()](http://sqlite.com/c3ref/errcode.html).
|
||
|
|
This function can point to the part of the SQL statement that
|
||
|
|
was in error. As an example of the improvement, a SQL file
|
||
|
|
that contained the following content:
|
||
|
|
|
||
|
|
```sql
|
||
|
|
|
||
|
|
-- This is a test
|
||
|
|
SELECT abc),
|
||
|
|
rtrim(def)
|
||
|
|
FROM mytable;
|
||
|
|
```
|
||
|
|
|
||
|
|
Would report an error like the following on startup in v0.10.1:
|
||
|
|
|
||
|
|
```text
|
||
|
|
error:/Users/tstack/.config/lnav/formats/installed/test.sql:2:near ")": syntax error
|
||
|
|
```
|
||
|
|
|
||
|
|
Now, you will get a clearer error message with a syntax-highlighted
|
||
|
|
code snippet and a pointer to the part of the code that has the
|
||
|
|
problem:
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
Inside the TUI, a panel has been added at the bottom to display these
|
||
|
|
long-form error messages. The panel will disappear after a short
|
||
|
|
time or when input is received. Here is an example showing an error
|
||
|
|
for an invalid regular expression:
|
||
|
|
|
||
|
|
<script id="asciicast-lmYMLZsB02WbSO8VEz4aVLXa1"
|
||
|
|
src="https://asciinema.org/a/lmYMLZsB02WbSO8VEz4aVLXa1.js"
|
||
|
|
async>
|
||
|
|
</script>
|