add timestamp to error log #316

jcubic · Feb 20, 2024 · 1819c3b · 1819c3b
1 parent 9786e1a
commit 1819c3b
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -18,6 +18,8 @@
 * update `log` to accept two arguments [#301](https://github.com/jcubic/lips/issues/301)
 * allow to use `data-bootstrap` attribute on script tags
 * make `atan` work for complex numbers
+* save error logs in home dir
+* add timestamp to error logs
 ### Bugfix
 * fix `let-values` to allow binding to list [#281](https://github.com/jcubic/lips/issues/281)
 * fix wrong strings in `string-fill!`

diff --git a/bin/lips.js b/bin/lips.js
@@ -61,6 +61,10 @@ process.on('uncaughtException', function (err) {
 
 // -----------------------------------------------------------------------------
 function log_error(message) {
+    const date = (new Date()).toISOString();
+    message = message.split('\n').map(line => {
+        return `${date}: ${line}`;
+    }).join('\n');
     fs.appendFileSync(path.join(os.homedir(), 'lips.error.log'), message + '\n');
 }
 // -----------------------------------------------------------------------------