Convert PCRE \A and \Z

Author: Nixinova

changelog.md

@@ -1,6 +1,7 @@
 # Changelog
 
-## Next
+## 1.5.1
+*2021-08-14*
 - Fixed PCRE regular expressions causing a crash.
 - Fixed shebang lines not being fully checked.
 - Fixed heuristics with two fallback languages not choosing just one of them.

package-lock.json

@@ -1,6 +1,6 @@
 {
 	"name": "linguist-js",
-	"version": "1.5.0",
+	"version": "1.5.1",
 	"description": "Analyse languages used in a folder. Powered by GitHub Linguist, although it doesn't need to be installed.",
 	"main": "dist/index.js",
 	"bin": {

package.json

@@ -22,7 +22,9 @@ function pcre(regex: string): RegExp {
 		finalRegex = finalRegex.replace(match, '');
 		[...flags].forEach(flag => finalFlags.add(flag));
 	}
-	finalRegex = finalRegex.replace(/([*+]){2}/g, '$1');
+	finalRegex = finalRegex
+		.replace(/([*+]){2}/g, '$1') // ++ and *+ modifiers
+		.replace(/\\A/g, '^').replace(/\\Z/g, '$') // start- and end-of-file markers
 	return RegExp(finalRegex, [...finalFlags].join(''));
 }