fix: parsing of regex in rules:if clause (#1712)

Author: ANGkeith

src/utils.ts

@@ -238,7 +238,7 @@ export class Utils {
 
         // Scenario when RHS is a <regex>
         // https://regexr.com/85sjo
-        const pattern1 = /\s*(?<operator>(?:=~)|(?:!~))\s*\/(?<rhs>.*?)\/(?<flags>[igmsuy]*)(\s|$|\))/g;
+        const pattern1 = /\s*(?<operator>(?:=~)|(?:!~))\s*\/(?<rhs>.*?[^\\])\/(?<flags>[igmsuy]*)(\s|$|\))/g;
         evalStr = evalStr.replace(pattern1, (_, operator, rhs, flags, remainingTokens) => {
             let _operator;
             switch (operator) {

tests/rules-regex.test.ts

@@ -114,6 +114,11 @@ const tests = [
         jsExpression: '("qwerty".matchRE2JS(RE2JS.compile("^perf_.*$", 0)) != null)',
         evalResult: false,
     },
+    {
+        rule: `"product-name/v0.0.0+build.0" =~ /^(?:product-name\\/)?v\\d+\\.\\d+\\.\\d+.*/`,
+        jsExpression: "\"product-name/v0.0.0+build.0\".matchRE2JS(RE2JS.compile(\"^(?:product-name\\\\/)?v\\\\d+\\\\.\\\\d+\\\\.\\\\d+.*\", 0)) != null",
+        evalResult: true,
+    },
 ];
 /* eslint-enable @stylistic/ts/quotes */