add disable rule feature for tag retention

Change-Id: I335f1fb3e1273c945dda85999a0218440092be12
Signed-off-by: Ziming Zhang <zziming@vmware.com>

src/pkg/retention/controller_test.go

@@ -65,6 +65,36 @@ func (s *ControllerTestSuite) TestPolicy() {
 					},
 				},
 			},
+			{
+				ID:       2,
+				Priority: 1,
+				Template: "recentXdays",
+				Disabled: true,
+				Parameters: rule.Parameters{
+					"num": 3,
+				},
+				TagSelectors: []*rule.Selector{
+					{
+						Kind:       "label",
+						Decoration: "with",
+						Pattern:    "latest",
+					},
+					{
+						Kind:       "regularExpression",
+						Decoration: "matches",
+						Pattern:    "release-[\\d\\.]+",
+					},
+				},
+				ScopeSelectors: map[string][]*rule.Selector{
+					"repository": {
+						{
+							Kind:       "regularExpression",
+							Decoration: "matches",
+							Pattern:    ".+",
+						},
+					},
+				},
+			},
 		},
 		Trigger: &policy.Trigger{
 			Kind: "Schedule",

src/pkg/retention/launcher.go

@@ -125,6 +125,10 @@ func (l *launcher) Launch(ply *policy.Metadata, executionID int64, isDryRun bool
 	}
 
 	for _, rule := range ply.Rules {
+		if rule.Disabled {
+			log.Infof("Policy %d rule %d %s is disabled", ply.ID, rule.ID, rule.Template)
+			continue
+		}
 		projectCandidates := allProjects
 		switch level {
 		case "system":

src/pkg/retention/launcher_test.go

@@ -243,6 +243,25 @@ func (l *launchTestSuite) TestLaunch() {
 					},
 				},
 			},
+			{
+				Disabled: true,
+				ScopeSelectors: map[string][]*rule.Selector{
+					"project": {
+						{
+							Kind:       "doublestar",
+							Decoration: "nsMatches",
+							Pattern:    "library1",
+						},
+					},
+					"repository": {
+						{
+							Kind:       "doublestar",
+							Decoration: "repoMatches",
+							Pattern:    "**",
+						},
+					},
+				},
+			},
 		},
 	}
 	n, err = launcher.Launch(ply, 1, false)

src/pkg/retention/policy/rule/models.go

@@ -22,6 +22,9 @@ type Metadata struct {
 	// Priority of rule when doing calculating
 	Priority int `json:"priority" valid:"Required"`
 
+	// Disabled rule
+	Disabled bool `json:"disabled"`
+
 	// Action of the rule performs
 	// "retain"
 	Action string `json:"action" valid:"Required"`