feat(cmd/influx): easy switch config

CHANGELOG.md

@@ -11,6 +11,7 @@
 1. [17448](https://github.com/influxdata/influxdb/pull/17448): Add foundation for pkger stacks, stateful package management
 1. [17462](https://github.com/influxdata/influxdb/pull/17462): Flag to disable scheduling of tasks
 1. [17470](https://github.com/influxdata/influxdb/pull/17470): Add ability to output cli output as json and hide table headers
+1. [17472](https://github.com/influxdata/influxdb/pull/17472): Add an easy way to switch config via cli
 
 ### Bug Fixes
 

cmd/influx/config.go

@@ -42,9 +42,10 @@ type cmdConfigBuilder struct {
 }
 
 func (b *cmdConfigBuilder) cmd() *cobra.Command {
-	cmd := b.newCmd("config", nil, false)
+	cmd := b.newCmd("config", b.cmdSwitchActiveRunEFn, false)
 	cmd.Short = "Config management commands"
-	cmd.Run = seeHelp
+	cmd.Args = cobra.ExactArgs(1)
+
 	cmd.AddCommand(
 		b.cmdCreate(),
 		b.cmdDelete(),
@@ -54,6 +55,37 @@ func (b *cmdConfigBuilder) cmd() *cobra.Command {
 	return cmd
 }
 
+func (b *cmdConfigBuilder) cmdSwitchActiveRunEFn(cmd *cobra.Command, args []string) error {
+	pp, err := b.svc.ParseConfigs()
+	if err != nil {
+		return err
+	}
+	b.name = args[0]
+	p0, ok := pp[b.name]
+	if !ok {
+		return &influxdb.Error{
+			Code: influxdb.ENotFound,
+			Msg:  fmt.Sprintf("name %q is not found", b.name),
+		}
+	}
+	pp[b.name] = p0
+
+	if err := pp.Switch(b.name); err != nil {
+		return err
+	}
+
+	if err = b.svc.WriteConfigs(pp); err != nil {
+		return err
+	}
+
+	return b.printConfigs(configPrintOpts{
+		config: cfg{
+			name:   b.name,
+			Config: pp[b.name],
+		},
+	})
+}
+
 func (b *cmdConfigBuilder) cmdCreate() *cobra.Command {
 	cmd := b.newCmd("create", b.cmdCreateRunEFn, false)
 	cmd.Short = "Create config"
@@ -201,7 +233,7 @@ func (b *cmdConfigBuilder) cmdUpdateRunEFn(*cobra.Command, []string) error {
 	return b.printConfigs(configPrintOpts{
 		config: cfg{
 			name:   b.name,
-			Config: p0,
+			Config: pp[b.name],
 		},
 	})
 }

cmd/influx/config_test.go

@@ -99,6 +99,84 @@ func TestCmdConfig(t *testing.T) {
 		}
 	})
 
+	t.Run("switch", func(t *testing.T) {
+		tests := []struct {
+			name     string
+			original config.Configs
+			expected config.Configs
+			arg      string
+		}{
+			{
+				name: "basic",
+				arg:  "default",
+				original: config.Configs{
+					"config1": {
+						Org:    "org2",
+						Active: true,
+						Token:  "tok2",
+						Host:   "http://localhost:8888",
+					},
+					"default": {
+						Org:    "org1",
+						Active: false,
+						Token:  "tok1",
+						Host:   "http://localhost:9999",
+					},
+				},
+				expected: config.Configs{
+					"config1": {
+						Org:    "org2",
+						Active: false,
+						Token:  "tok2",
+						Host:   "http://localhost:8888",
+					},
+					"default": {
+						Org:    "org1",
+						Active: true,
+						Token:  "tok1",
+						Host:   "http://localhost:9999",
+					},
+				},
+			},
+		}
+		cmdFn := func(orginal, expected config.Configs) func(*globalFlags, genericCLIOpts) *cobra.Command {
+			svc := &config.MockConfigService{
+				ParseConfigsFn: func() (config.Configs, error) {
+					return orginal, nil
+				},
+				WriteConfigsFn: func(pp config.Configs) error {
+					if diff := cmp.Diff(expected, pp); diff != "" {
+						return &influxdb.Error{
+							Msg: fmt.Sprintf("write configs failed, diff %s", diff),
+						}
+					}
+					return nil
+				},
+			}
+
+			return func(g *globalFlags, opt genericCLIOpts) *cobra.Command {
+				builder := cmdConfigBuilder{
+					genericCLIOpts: opt,
+					globalFlags:    g,
+					svc:            svc,
+				}
+				return builder.cmd()
+			}
+		}
+		for _, tt := range tests {
+			fn := func(t *testing.T) {
+				builder := newInfluxCmdBuilder(
+					in(new(bytes.Buffer)),
+					out(ioutil.Discard),
+				)
+				cmd := builder.cmd(cmdFn(tt.original, tt.expected))
+				cmd.SetArgs([]string{"config", tt.arg})
+				require.NoError(t, cmd.Execute())
+			}
+			t.Run(tt.name, fn)
+		}
+	})
+
 	t.Run("set", func(t *testing.T) {
 		tests := []struct {
 			name     string