parse: fix parsing for label values with commas (#1395)

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

pkg/parse/parse.go

@@ -40,13 +40,31 @@ func Matchers(s string) ([]*labels.Matcher, error) {
 		s = s[:len(s)-1]
 	}
 
-	for _, toParse := range strings.Split(s, ",") {
-		m, err := Matcher(toParse)
+	var insideQuotes bool
+	var token string
+	var tokens []string
+	for _, r := range s {
+		if !insideQuotes && r == ',' {
+			tokens = append(tokens, token)
+			token = ""
+			continue
+		}
+		token += string(r)
+		if r == '"' {
+			insideQuotes = !insideQuotes
+		}
+	}
+	if token != "" {
+		tokens = append(tokens, token)
+	}
+	for _, token := range tokens {
+		m, err := Matcher(token)
 		if err != nil {
 			return nil, err
 		}
 		matchers = append(matchers, m)
 	}
+
 	return matchers, nil
 }
 

pkg/parse/parse_test.go

@@ -24,6 +24,7 @@ func TestMatchers(t *testing.T) {
 	testCases := []struct {
 		input string
 		want  []*labels.Matcher
+		err   error
 	}{
 		{
 			input: `{foo="bar"}`,
@@ -122,15 +123,24 @@ func TestMatchers(t *testing.T) {
 				return append(ms, m)
 			}(),
 		},
+		{
+			input: `{foo="bar,quux", job="job1"}`,
+			want: func() []*labels.Matcher {
+				ms := []*labels.Matcher{}
+				m, _ := labels.NewMatcher(labels.MatchEqual, "foo", "bar,quux")
+				m2, _ := labels.NewMatcher(labels.MatchEqual, "job", "job1")
+				return append(ms, m, m2)
+			}(),
+		},
 	}
 
 	for i, tc := range testCases {
 		got, err := Matchers(tc.input)
-		if err != nil {
-			t.Fatalf("error (i=%d): %v", i, err)
+		if tc.err != err {
+			t.Fatalf("error not equal (i=%d):\ngot  %v\nwant %v", i, err, tc.err)
 		}
 		if !reflect.DeepEqual(got, tc.want) {
-			t.Fatalf("error not equal (i=%d):\ngot  %v\nwant %v", i, got, tc.want)
+			t.Fatalf("labels not equal (i=%d):\ngot  %v\nwant %v", i, got, tc.want)
 		}
 	}