Allow nested namespaces in git URLs

internal/upstream/routes.go

@@ -30,14 +30,12 @@ type routeEntry struct {
 	matchers []matcherFunc
 }
 
-const projectPattern = `^/[^/]+/[^/]+/`
-const gitProjectPattern = `^/[^/]+/[^/]+\.git/`
-
-const apiPattern = `^/api/`
-
-// A project ID in an API request is either a number or two strings 'namespace/project'
-const projectsAPIPattern = `^/api/v3/projects/((\d+)|([^/]+/[^/]+))/`
-const ciAPIPattern = `^/ci/api/`
+const (
+	apiPattern        = `^/api/`
+	ciAPIPattern      = `^/ci/api/`
+	gitProjectPattern = `^/([^/]+/){1,}[^/]+\.git/`
+	projectPattern    = `^/([^/]+/){1,}[^/]+/`
+)
 
 func compileRegexp(regexpStr string) *regexp.Regexp {
 	if len(regexpStr) == 0 {

main_test.go

@@ -178,6 +178,8 @@ func TestRegularProjectsAPI(t *testing.T) {
 		"/api/v3/projects/foo%2Fbar/repository/not/special",
 		"/api/v3/projects/123/not/special",
 		"/api/v3/projects/foo%2Fbar/not/special",
+		"/api/v3/projects/foo%2Fbar%2Fbaz/repository/not/special",
+		"/api/v3/projects/foo%2Fbar%2Fbaz%2Fqux/repository/not/special",
 	} {
 		resp, err := http.Get(ws.URL + resource)
 		if err != nil {