Add label selector flag to get cmd

Signed-off-by: Somtochi Onyekwere <somtochionyekwere@gmail.com>

cmd/flux/get.go

@@ -66,6 +66,7 @@ type GetFlags struct {
 	allNamespaces  bool
 	noHeader       bool
 	statusSelector string
+	labelSelector  string
 	watch          bool
 }
 
@@ -78,6 +79,8 @@ func init() {
 	getCmd.PersistentFlags().BoolVarP(&getArgs.watch, "watch", "w", false, "After listing/getting the requested object, watch for changes.")
 	getCmd.PersistentFlags().StringVar(&getArgs.statusSelector, "status-selector", "",
 		"specify the status condition name and the desired state to filter the get result, e.g. ready=false")
+	getCmd.PersistentFlags().StringVarP(&getArgs.labelSelector, "label-selector", "l", "",
+		"filter objects by label selector")
 	rootCmd.AddCommand(getCmd)
 }
 
@@ -150,6 +153,21 @@ func (get getCommand) run(cmd *cobra.Command, args []string) error {
 		listOpts = append(listOpts, client.MatchingFields{"metadata.name": args[0]})
 	}
 
+	if getArgs.labelSelector != "" {
+		label, err := metav1.ParseToLabelSelector(getArgs.labelSelector)
+		if err != nil {
+			return fmt.Errorf("unable to parse label selector: %w", err)
+		}
+
+		sel, err := metav1.LabelSelectorAsSelector(label)
+		if err != nil {
+			return err
+		}
+		listOpts = append(listOpts, client.MatchingLabelsSelector{
+			Selector: sel,
+		})
+	}
+
 	getAll := cmd.Use == "all"
 
 	if getArgs.watch {

cmd/flux/get_test.go

@@ -0,0 +1,61 @@
+//go:build unit
+// +build unit
+
+/*
+Copyright 2023 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import "testing"
+
+func Test_GetCmd(t *testing.T) {
+	tmpl := map[string]string{
+		"fluxns": allocateNamespace("flux-system"),
+	}
+	testEnv.CreateObjectFile("./testdata/get/objects.yaml", tmpl, t)
+
+	tests := []struct {
+		name     string
+		args     string
+		expected string
+	}{
+		{
+			name:     "no label selector",
+			expected: "testdata/get/get.golden",
+		},
+		{
+			name:     "equal label selector",
+			args:     "-l sharding.fluxcd.io/key=shard1",
+			expected: "testdata/get/get_label_one.golden",
+		},
+		{
+			name:     "notin label selector",
+			args:     `-l "sharding.fluxcd.io/key notin (shard1, shard2)"`,
+			expected: "testdata/get/get_label_two.golden",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cmd := cmdTestCase{
+				args:   "get sources git " + tt.args + " -n " + tmpl["fluxns"],
+				assert: assertGoldenTemplateFile(tt.expected, nil),
+			}
+
+			cmd.runTestCmd(t)
+		})
+	}
+}

cmd/flux/testdata/get/get.golden

@@ -0,0 +1,4 @@
+NAME          	REVISION          	SUSPENDED	READY	MESSAGE                              
+podinfo       	main@sha1:696f056d	False    	True 	Fetched revision: main@sha1:696f056d	
+podinfo-shard1	main@sha1:696f056d	False    	True 	Fetched revision: main@sha1:696f056d	
+podinfo-shard2	main@sha1:696f056d	False    	True 	Fetched revision: main@sha1:696f056d	

cmd/flux/testdata/get/get_label_one.golden

@@ -0,0 +1,2 @@
+NAME          	REVISION          	SUSPENDED	READY	MESSAGE                              
+podinfo-shard1	main@sha1:696f056d	False    	True 	Fetched revision: main@sha1:696f056d	

cmd/flux/testdata/get/get_label_two.golden

@@ -0,0 +1,2 @@
+NAME   	REVISION          	SUSPENDED	READY	MESSAGE                              
+podinfo	main@sha1:696f056d	False    	True 	Fetched revision: main@sha1:696f056d	

cmd/flux/testdata/get/objects.yaml

@@ -0,0 +1,91 @@
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: {{ .fluxns }}
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: GitRepository
+metadata:
+  labels:
+    kustomize.toolkit.fluxcd.io/name: flux-system
+    kustomize.toolkit.fluxcd.io/namespace: {{ .fluxns }}
+  name: podinfo
+  namespace: {{ .fluxns }}
+spec:
+  ref:
+    branch: main
+  secretRef:
+    name: flux-system
+  url: ssh://git@github.com/example/repo
+  interval: 5m
+status:
+  artifact:
+    lastUpdateTime: "2021-08-01T04:28:42Z"
+    revision: main@sha1:696f056df216eea4f9401adbee0ff744d4df390f
+    path: "example"
+    url: "example"
+  conditions:
+    - lastTransitionTime: "2021-07-20T00:48:16Z"
+      message: 'Fetched revision: main@sha1:696f056df216eea4f9401adbee0ff744d4df390f'
+      reason: GitOperationSucceed
+      status: "True"
+      type: Ready
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: GitRepository
+metadata:
+  labels:
+    kustomize.toolkit.fluxcd.io/name: flux-system
+    kustomize.toolkit.fluxcd.io/namespace: {{ .fluxns }}
+    sharding.fluxcd.io/key: shard1
+  name: podinfo-shard1
+  namespace: {{ .fluxns }}
+spec:
+  ref:
+    branch: main
+  secretRef:
+    name: flux-system
+  url: ssh://git@github.com/example/repo
+  interval: 5m
+status:
+  artifact:
+    lastUpdateTime: "2021-08-01T04:28:42Z"
+    revision: main@sha1:696f056df216eea4f9401adbee0ff744d4df390f
+    path: "example"
+    url: "example"
+  conditions:
+    - lastTransitionTime: "2021-07-20T00:48:16Z"
+      message: 'Fetched revision: main@sha1:696f056df216eea4f9401adbee0ff744d4df390f'
+      reason: GitOperationSucceed
+      status: "True"
+      type: Ready
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: GitRepository
+metadata:
+  labels:
+    kustomize.toolkit.fluxcd.io/name: flux-system
+    kustomize.toolkit.fluxcd.io/namespace: {{ .fluxns }}
+    sharding.fluxcd.io/key: shard2
+  name: podinfo-shard2
+  namespace: {{ .fluxns }}
+spec:
+  ref:
+    branch: main
+  secretRef:
+    name: flux-system
+  url: ssh://git@github.com/example/repo
+  interval: 5m
+status:
+  artifact:
+    lastUpdateTime: "2021-08-01T04:28:42Z"
+    revision: main@sha1:696f056df216eea4f9401adbee0ff744d4df390f
+    path: "example"
+    url: "example"
+  conditions:
+    - lastTransitionTime: "2021-07-20T00:48:16Z"
+      message: 'Fetched revision: main@sha1:696f056df216eea4f9401adbee0ff744d4df390f'
+      reason: GitOperationSucceed
+      status: "True"
+      type: Ready