feat(deep-links): sprig support (#14660) (#14676)

Signed-off-by: daftping <21245083+daftping@users.noreply.github.com>
Co-authored-by: daftping <21245083+daftping@users.noreply.github.com>

server/deeplinks/deeplinks.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"text/template"
 
+	"github.com/Masterminds/sprig/v3"
 	"github.com/antonmedv/expr"
 	"github.com/argoproj/argo-cd/v2/pkg/apiclient/application"
 	"github.com/argoproj/argo-cd/v2/pkg/apis/application/v1alpha1"
@@ -14,6 +15,15 @@ import (
 	"k8s.io/utils/pointer"
 )
 
+var sprigFuncMap = sprig.GenericFuncMap() // a singleton for better performance
+
+func init() {
+	// Avoid allowing the user to learn things about the environment.
+	delete(sprigFuncMap, "env")
+	delete(sprigFuncMap, "expandenv")
+	delete(sprigFuncMap, "getHostByName")
+}
+
 const (
 	ResourceDeepLinkKey = "resource"
 	AppDeepLinkKey      = "application"
@@ -71,7 +81,7 @@ func EvaluateDeepLinksResponse(obj map[string]interface{}, name string, links []
 	finalLinks := []*application.LinkInfo{}
 	errors := []string{}
 	for _, link := range links {
-		t, err := template.New("deep-link").Parse(link.URL)
+		t, err := template.New("deep-link").Funcs(sprigFuncMap).Parse(link.URL)
 		if err != nil {
 			errors = append(errors, fmt.Sprintf("failed to parse link template '%v', error=%v", link.URL, err.Error()))
 			continue

server/deeplinks/deeplinks_test.go

@@ -130,6 +130,22 @@ func TestDeepLinks(t *testing.T) {
 			}},
 			error: []string{"link condition '1 + 1' evaluated to non-boolean value for resource test"},
 		},
+		{
+			appObj:      appObj,
+			resourceObj: resourceObj,
+			projectObj:  projectObj,
+			clusterObj:  clusterObj,
+			inputLinks: []settings.DeepLink{{
+				Title:     "link",
+				URL:       "http://example.com/{{ .cluster.name | replace \"-\" \"_\" }}&{{ first .project.spec.sourceRepos }}",
+				Condition: pointer.String(`application.metadata.name == "test" && project.metadata.name == "test-project"`),
+			}},
+			outputLinks: []*application.LinkInfo{{
+				Title: pointer.String("link"),
+				Url:   pointer.String("http://example.com/test_cluster&test-repo.git"),
+			}},
+			error: []string{},
+		},
 	}
 
 	for _, tc := range testTable {