Alerting: Fix matching labels with spaces in their values (#68909)

Fix matching labels with spaces in their values

public/app/features/alerting/unified/utils/alertmanager.test.ts

@@ -85,6 +85,17 @@ describe('Alertmanager utils', () => {
       ]);
     });
 
+    it('should parse with spaces in the value', () => {
+      expect(parseMatchers('foo=bar bazz')).toEqual<Matcher[]>([
+        {
+          name: 'foo',
+          value: 'bar bazz',
+          isRegex: false,
+          isEqual: true,
+        },
+      ]);
+    });
+
     it('should return nothing for invalid operator', () => {
       expect(parseMatchers('foo=!bar')).toEqual([]);
     });

public/app/features/alerting/unified/utils/alertmanager.ts

@@ -132,7 +132,7 @@ export function matcherToObjectMatcher(matcher: Matcher): ObjectMatcher {
 }
 
 export function parseMatchers(matcherQueryString: string): Matcher[] {
-  const matcherRegExp = /\b([\w.-]+)(=~|!=|!~|=(?="?\w))"?([^"\n,} ]*)"?/g;
+  const matcherRegExp = /\b([\w.-]+)(=~|!=|!~|=(?="?\w))"?([^"\n,}]*)"?/g;
   const matchers: Matcher[] = [];
 
   matcherQueryString.replace(matcherRegExp, (_, key, operator, value) => {