feat(sourceNamespace): Regex Support

Signed-off-by: Arthur <[email protected]>

go.mod

@@ -185,6 +185,7 @@ require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/desertbit/timer v0.0.0-20180107155436-c41aec40b27f // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
+	github.com/dlclark/regexp2 v1.11.2
 	github.com/emicklei/go-restful/v3 v3.11.0 // indirect
 	github.com/emirpasic/gods v1.18.1 // indirect
 	github.com/evanphx/json-patch/v5 v5.8.0 // indirect

go.sum

@@ -844,6 +844,8 @@ github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/r
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
 github.com/distribution/reference v0.5.0 h1:/FUIFXtfc/x2gpa5/VGfiGLuOIdYa1t65IKK2OFGvA0=
 github.com/distribution/reference v0.5.0/go.mod h1:BbU0aIcezP1/5jX/8MP0YiH4SdvB5Y4f/wlDRiLyi3E=
+github.com/dlclark/regexp2 v1.11.2 h1:/u628IuisSTwri5/UKloiIsH8+qF2Pu7xEQX+yIKg68=
+github.com/dlclark/regexp2 v1.11.2/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
 github.com/dnaeon/go-vcr v1.1.0 h1:ReYa/UBrRyQdant9B4fNHGoCNKw6qh6P0fsdGmZpR7c=
 github.com/dnaeon/go-vcr v1.1.0/go.mod h1:M7tiix8f0r6mKKJ3Yq/kqU1OYf3MnfmBWVbPx/yU9ko=
 github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=

util/glob/list.go

@@ -1,10 +1,21 @@
 package glob
 
+import (
+	"strings"
+
+	"github.com/argoproj/argo-cd/v2/util/regex"
+)
+
 // MatchStringInList will return true if item is contained in list. If
 // exactMatch is set to false, list may contain globs to be matched.
 func MatchStringInList(list []string, item string, exactMatch bool) bool {
 	for _, ll := range list {
-		if item == ll || (!exactMatch && Match(ll, item)) {
+		// If string is wrapped in "/", assume it is a regular expression.
+		if !exactMatch && strings.HasPrefix(ll, "/") && strings.HasSuffix(ll, "/") {
+			if regex.Match(ll[1:len(ll)-1], item) {
+				return true
+			}
+		} else if item == ll || (!exactMatch && Match(ll, item)) {
 			return true
 		}
 	}

util/regex/regex.go

@@ -0,0 +1,20 @@
+package regex
+
+import (
+	"github.com/dlclark/regexp2"
+	log "github.com/sirupsen/logrus"
+)
+
+func Match(pattern, text string) bool {
+	compiledRegex, err := regexp2.Compile(pattern, 0)
+	if err != nil {
+		log.Warnf("failed to compile pattern %s due to error %v", pattern, err)
+		return false
+	}
+	regexMatch, err := compiledRegex.MatchString(text)
+	if err != nil {
+		log.Warnf("failed to match pattern %s due to error %v", pattern, err)
+		return false
+	}
+	return regexMatch
+}

util/security/application_namespaces_test.go

@@ -49,6 +49,20 @@ func Test_IsNamespaceEnabled(t *testing.T) {
 			[]string{"allowed"},
 			false,
 		},
+		{
+			"match everything but specified word: fail",
+			"disallowed",
+			"argocd",
+			[]string{"/^((?!disallowed).)*$/"},
+			false,
+		},
+		{
+			"match everything but specified word: pass",
+			"allowed",
+			"argocd",
+			[]string{"/^((?!disallowed).)*$/"},
+			true,
+		},
 	}
 
 	for _, tc := range testCases {