fix(env): keep emoji / surrogate pairs intact during env value truncation

maweibin · claude · maweibin · commit cfd57aca6f68 · 2026-07-07T19:37:45.000+08:00
Use Array.from() to count full code points instead of UTF-16 code
units, preventing lone surrogates in env var display output.

Co-Authored-By: Claude Opus 4.8 &lt;noreply@anthropic.com&gt;
diff --git a/src/infra/env.ts b/src/infra/env.ts
@@ -36,7 +36,7 @@ function formatEnvValue(value: string, redact?: boolean): string {
   if (singleLine.length <= 160) {
     return singleLine;
   }
-  return `${singleLine.slice(0, 160)}…`;
+  return `${Array.from(singleLine).slice(0, 160).join("")}…`;
 }
 
 /** Logs an accepted env option once, with optional redaction for sensitive values. */

Original file line number	Diff line number	Diff line change
`@@ -36,7 +36,7 @@ function formatEnvValue(value: string, redact?: boolean): string {`
`36`	`36`	`if (singleLine.length <= 160) {`
`37`	`37`	`return singleLine;`
`38`	`38`	`}`
`39`		- return `${singleLine.slice(0, 160)}…`;
	`39`	+ return `${Array.from(singleLine).slice(0, 160).join("")}…`;
`40`	`40`	`}`
`41`	`41`
`42`	`42`	`/** Logs an accepted env option once, with optional redaction for sensitive values. */`