golangci-lint: set go version to prevent fallback to go1.17, and fix copyloopvar linting issues

.golangci.yml

@@ -41,6 +41,9 @@ linters:
     - errcheck
 
 run:
+  # prevent golangci-lint from deducting the go version to lint for through go.mod,
+  # which causes it to fallback to go1.17 semantics.
+  go: "1.23.2"
   timeout: 5m
 
 linters-settings:

cli-plugins/manager/cobra.go

@@ -52,7 +52,6 @@ func AddPluginCommandStubs(dockerCli command.Cli, rootCmd *cobra.Command) (err e
 			return
 		}
 		for _, p := range plugins {
-			p := p
 			vendor := p.Vendor
 			if vendor == "" {
 				vendor = "unknown"

cli/command/cli_test.go

@@ -187,19 +187,18 @@ func TestInitializeFromClient(t *testing.T) {
 		},
 	}
 
-	for _, testcase := range testcases {
-		testcase := testcase
-		t.Run(testcase.doc, func(t *testing.T) {
+	for _, tc := range testcases {
+		t.Run(tc.doc, func(t *testing.T) {
 			apiclient := &fakeClient{
-				pingFunc: testcase.pingFunc,
+				pingFunc: tc.pingFunc,
 				version:  defaultVersion,
 			}
 
 			cli := &DockerCli{client: apiclient}
 			err := cli.Initialize(flags.NewClientOptions())
 			assert.NilError(t, err)
-			assert.DeepEqual(t, cli.ServerInfo(), testcase.expectedServer)
-			assert.Equal(t, apiclient.negotiated, testcase.negotiated)
+			assert.DeepEqual(t, cli.ServerInfo(), tc.expectedServer)
+			assert.Equal(t, apiclient.negotiated, tc.negotiated)
 		})
 	}
 }
@@ -277,10 +276,9 @@ func TestExperimentalCLI(t *testing.T) {
 		},
 	}
 
-	for _, testcase := range testcases {
-		testcase := testcase
-		t.Run(testcase.doc, func(t *testing.T) {
-			dir := fs.NewDir(t, testcase.doc, fs.WithFile("config.json", testcase.configfile))
+	for _, tc := range testcases {
+		t.Run(tc.doc, func(t *testing.T) {
+			dir := fs.NewDir(t, tc.doc, fs.WithFile("config.json", tc.configfile))
 			defer dir.Remove()
 			apiclient := &fakeClient{
 				version: defaultVersion,

cli/command/completion/functions_test.go

@@ -150,7 +150,6 @@ func TestCompleteContainerNames(t *testing.T) {
 	}
 
 	for _, tc := range tests {
-		tc := tc
 		t.Run(tc.doc, func(t *testing.T) {
 			if tc.showIDs {
 				t.Setenv("DOCKER_COMPLETION_SHOW_CONTAINER_IDS", "yes")
@@ -227,7 +226,6 @@ func TestCompleteImageNames(t *testing.T) {
 	}
 
 	for _, tc := range tests {
-		tc := tc
 		t.Run(tc.doc, func(t *testing.T) {
 			comp := ImageNames(fakeCLI{&fakeClient{
 				imageListFunc: func(options image.ListOptions) ([]image.Summary, error) {
@@ -273,7 +271,6 @@ func TestCompleteNetworkNames(t *testing.T) {
 	}
 
 	for _, tc := range tests {
-		tc := tc
 		t.Run(tc.doc, func(t *testing.T) {
 			comp := NetworkNames(fakeCLI{&fakeClient{
 				networkListFunc: func(ctx context.Context, options network.ListOptions) ([]network.Summary, error) {
@@ -331,7 +328,6 @@ func TestCompleteVolumeNames(t *testing.T) {
 	}
 
 	for _, tc := range tests {
-		tc := tc
 		t.Run(tc.doc, func(t *testing.T) {
 			comp := VolumeNames(fakeCLI{&fakeClient{
 				volumeListFunc: func(filter filters.Args) (volume.ListResponse, error) {

cli/command/config/create_test.go

@@ -43,7 +43,6 @@ func TestConfigCreateErrors(t *testing.T) {
 		},
 	}
 	for _, tc := range testCases {
-		tc := tc
 		t.Run(tc.expectedError, func(t *testing.T) {
 			cmd := newConfigCreateCommand(
 				test.NewFakeCli(&fakeClient{

cli/command/config/formatter_test.go

@@ -61,7 +61,6 @@ id_rsa
 		},
 	}
 	for _, tc := range cases {
-		tc := tc
 		t.Run(string(tc.context.Format), func(t *testing.T) {
 			var out bytes.Buffer
 			tc.context.Output = &out

cli/command/container/attach_test.go

@@ -73,7 +73,6 @@ func TestNewAttachCommandErrors(t *testing.T) {
 		},
 	}
 	for _, tc := range testCases {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			cmd := NewAttachCommand(test.NewFakeCli(&fakeClient{inspectFunc: tc.containerInspectFunc}))
 			cmd.SetOut(io.Discard)

cli/command/container/cp_test.go

@@ -178,7 +178,6 @@ func TestSplitCpArg(t *testing.T) {
 		},
 	}
 	for _, tc := range testcases {
-		tc := tc
 		t.Run(tc.doc, func(t *testing.T) {
 			if tc.os == "windows" && runtime.GOOS != "windows" {
 				t.Skip("skipping windows test on non-windows platform")

cli/command/container/create_test.go

@@ -113,7 +113,6 @@ func TestCreateContainerImagePullPolicy(t *testing.T) {
 		},
 	}
 	for _, tc := range cases {
-		tc := tc
 		t.Run(tc.PullPolicy, func(t *testing.T) {
 			pullCounter := 0
 
@@ -176,7 +175,6 @@ func TestCreateContainerImagePullPolicyInvalid(t *testing.T) {
 		},
 	}
 	for _, tc := range cases {
-		tc := tc
 		t.Run(tc.PullPolicy, func(t *testing.T) {
 			dockerCli := test.NewFakeCli(&fakeClient{})
 			err := runCreate(
@@ -207,7 +205,6 @@ func TestCreateContainerValidateFlags(t *testing.T) {
 			expectedErr: `invalid argument "STDINFO" for "-a, --attach" flag: valid streams are STDIN, STDOUT and STDERR`,
 		},
 	} {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			cmd := NewCreateCommand(test.NewFakeCli(&fakeClient{}))
 			cmd.SetOut(io.Discard)
@@ -251,7 +248,6 @@ func TestNewCreateCommandWithContentTrustErrors(t *testing.T) {
 		},
 	}
 	for _, tc := range testCases {
-		tc := tc
 		fakeCLI := test.NewFakeCli(&fakeClient{
 			createContainerFunc: func(config *container.Config,
 				hostConfig *container.HostConfig,
@@ -312,7 +308,6 @@ func TestNewCreateCommandWithWarnings(t *testing.T) {
 		},
 	}
 	for _, tc := range testCases {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			fakeCLI := test.NewFakeCli(&fakeClient{
 				createContainerFunc: func(config *container.Config,

cli/command/container/formatter_diff_test.go

@@ -47,7 +47,6 @@ D: /usr/app/old_app.js
 	}
 
 	for _, tc := range cases {
-		tc := tc
 		t.Run(string(tc.context.Format), func(t *testing.T) {
 			out := bytes.NewBufferString("")
 			tc.context.Output = out

cli/command/container/formatter_stats_test.go

@@ -178,7 +178,6 @@ container2  --  --
 	}
 
 	for _, tc := range cases {
-		tc := tc
 		t.Run(string(tc.context.Format), func(t *testing.T) {
 			var out bytes.Buffer
 			tc.context.Output = &out
@@ -223,7 +222,6 @@ func TestContainerStatsContextWriteWithNoStats(t *testing.T) {
 	}
 
 	for _, tc := range cases {
-		tc := tc
 		t.Run(string(tc.context.Format), func(t *testing.T) {
 			err := statsFormatWrite(tc.context, []StatsEntry{}, "linux", false)
 			assert.NilError(t, err)
@@ -265,7 +263,6 @@ func TestContainerStatsContextWriteWithNoStatsWindows(t *testing.T) {
 	}
 
 	for _, tc := range cases {
-		tc := tc
 		t.Run(string(tc.context.Format), func(t *testing.T) {
 			err := statsFormatWrite(tc.context, []StatsEntry{}, "windows", false)
 			assert.NilError(t, err)

cli/command/container/list_test.go

@@ -277,7 +277,6 @@ func TestContainerListFormatSizeSetsOption(t *testing.T) {
 	}
 
 	for _, tc := range tests {
-		tc := tc
 		t.Run(tc.doc, func(t *testing.T) {
 			cli := test.NewFakeCli(&fakeClient{
 				containerListFunc: func(options container.ListOptions) ([]container.Summary, error) {

cli/command/container/opts.go

@@ -762,7 +762,6 @@ func parseNetworkOpts(copts *containerOptions) (map[string]*networktypes.Endpoin
 	}
 
 	for i, n := range copts.netMode.Value() {
-		n := n
 		if container.NetworkMode(n.Target).IsUserDefined() {
 			hasUserDefined = true
 		} else {

cli/command/container/opts_test.go

@@ -126,7 +126,6 @@ func TestParseRunAttach(t *testing.T) {
 		},
 	}
 	for _, tc := range tests {
-		tc := tc
 		t.Run(tc.input, func(t *testing.T) {
 			config, _, _ := mustParse(t, tc.input)
 			assert.Equal(t, config.AttachStdin, tc.expected.AttachStdin)
@@ -802,7 +801,6 @@ func TestParseRestartPolicy(t *testing.T) {
 		},
 	}
 	for _, tc := range tests {
-		tc := tc
 		t.Run(tc.input, func(t *testing.T) {
 			_, hostConfig, _, err := parseRun([]string{"--restart=" + tc.input, "img", "cmd"})
 			if tc.expectedErr != "" {

cli/command/container/port_test.go

@@ -43,7 +43,6 @@ func TestNewPortCommandOutput(t *testing.T) {
 		},
 	}
 	for _, tc := range testCases {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			cli := test.NewFakeCli(&fakeClient{
 				inspectFunc: func(string) (container.InspectResponse, error) {

cli/command/container/restart_test.go

@@ -58,7 +58,6 @@ func TestRestart(t *testing.T) {
 			expectedErr: "conflicting options: cannot specify both --timeout and --time",
 		},
 	} {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			var restarted []string
 			mutex := new(sync.Mutex)

cli/command/container/rm_test.go

@@ -23,7 +23,6 @@ func TestRemoveForce(t *testing.T) {
 		{name: "without force", args: []string{"nosuchcontainer", "mycontainer"}, expectedErr: "no such container"},
 		{name: "with force", args: []string{"--force", "nosuchcontainer", "mycontainer"}, expectedErr: ""},
 	} {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			var removed []string
 			mutex := new(sync.Mutex)

cli/command/container/run_test.go

@@ -35,7 +35,6 @@ func TestRunValidateFlags(t *testing.T) {
 			expectedErr: "conflicting options: cannot specify both --attach and --detach",
 		},
 	} {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			cmd := NewRunCommand(test.NewFakeCli(&fakeClient{}))
 			cmd.SetOut(io.Discard)
@@ -245,7 +244,6 @@ func TestRunCommandWithContentTrustErrors(t *testing.T) {
 		},
 	}
 	for _, tc := range testCases {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			fakeCLI := test.NewFakeCli(&fakeClient{
 				createContainerFunc: func(config *container.Config,
@@ -286,7 +284,6 @@ func TestRunContainerImagePullPolicyInvalid(t *testing.T) {
 		},
 	}
 	for _, tc := range cases {
-		tc := tc
 		t.Run(tc.PullPolicy, func(t *testing.T) {
 			dockerCli := test.NewFakeCli(&fakeClient{})
 			err := runRun(

cli/command/container/stop_test.go

@@ -58,7 +58,6 @@ func TestStop(t *testing.T) {
 			expectedErr: "conflicting options: cannot specify both --timeout and --time",
 		},
 	} {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			var stopped []string
 			mutex := new(sync.Mutex)

cli/command/context/create_test.go

@@ -94,7 +94,6 @@ func TestCreate(t *testing.T) {
 		},
 	}
 	for _, tc := range tests {
-		tc := tc
 		t.Run(tc.options.Name, func(t *testing.T) {
 			err := RunCreate(cli, &tc.options)
 			if tc.expecterErr == "" {
@@ -164,25 +163,24 @@ func TestCreateFromContext(t *testing.T) {
 
 	cli.SetCurrentContext("dummy")
 
-	for _, c := range cases {
-		c := c
-		t.Run(c.name, func(t *testing.T) {
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
 			cli.ResetOutputBuffers()
 			err := RunCreate(cli, &CreateOptions{
 				From:        "original",
-				Name:        c.name,
-				Description: c.description,
-				Docker:      c.docker,
+				Name:        tc.name,
+				Description: tc.description,
+				Docker:      tc.docker,
 			})
 			assert.NilError(t, err)
-			assertContextCreateLogging(t, cli, c.name)
-			newContext, err := cli.ContextStore().GetMetadata(c.name)
+			assertContextCreateLogging(t, cli, tc.name)
+			newContext, err := cli.ContextStore().GetMetadata(tc.name)
 			assert.NilError(t, err)
 			newContextTyped, err := command.GetDockerContext(newContext)
 			assert.NilError(t, err)
 			dockerEndpoint, err := docker.EndpointFromContext(newContext)
 			assert.NilError(t, err)
-			assert.Equal(t, newContextTyped.Description, c.expectedDescription)
+			assert.Equal(t, newContextTyped.Description, tc.expectedDescription)
 			assert.Equal(t, dockerEndpoint.Host, "tcp://42.42.42.42:2375")
 		})
 	}
@@ -219,23 +217,22 @@ func TestCreateFromCurrent(t *testing.T) {
 
 	cli.SetCurrentContext("original")
 
-	for _, c := range cases {
-		c := c
-		t.Run(c.name, func(t *testing.T) {
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
 			cli.ResetOutputBuffers()
 			err := RunCreate(cli, &CreateOptions{
-				Name:        c.name,
-				Description: c.description,
+				Name:        tc.name,
+				Description: tc.description,
 			})
 			assert.NilError(t, err)
-			assertContextCreateLogging(t, cli, c.name)
-			newContext, err := cli.ContextStore().GetMetadata(c.name)
+			assertContextCreateLogging(t, cli, tc.name)
+			newContext, err := cli.ContextStore().GetMetadata(tc.name)
 			assert.NilError(t, err)
 			newContextTyped, err := command.GetDockerContext(newContext)
 			assert.NilError(t, err)
 			dockerEndpoint, err := docker.EndpointFromContext(newContext)
 			assert.NilError(t, err)
-			assert.Equal(t, newContextTyped.Description, c.expectedDescription)
+			assert.Equal(t, newContextTyped.Description, tc.expectedDescription)
 			assert.Equal(t, dockerEndpoint.Host, "tcp://42.42.42.42:2375")
 		})
 	}

cli/command/formatter/container_test.go

@@ -346,7 +346,6 @@ size: 0B
 	}
 
 	for _, tc := range cases {
-		tc := tc
 		t.Run(string(tc.context.Format), func(t *testing.T) {
 			var out bytes.Buffer
 			tc.context.Output = &out
@@ -411,7 +410,6 @@ func TestContainerContextWriteWithNoContainers(t *testing.T) {
 	}
 
 	for _, tc := range cases {
-		tc := tc
 		t.Run(string(tc.context.Format), func(t *testing.T) {
 			err := ContainerWrite(tc.context, containers)
 			assert.NilError(t, err)

cli/command/formatter/disk_usage_test.go

@@ -106,7 +106,6 @@ Build Cache     0         0         0B        0B
 	}
 
 	for _, tc := range cases {
-		tc := tc
 		t.Run(string(tc.context.Format), func(t *testing.T) {
 			var out bytes.Buffer
 			tc.context.Output = &out

cli/command/formatter/image_test.go

@@ -304,7 +304,6 @@ image_id: imageID3
 	}
 
 	for _, tc := range cases {
-		tc := tc
 		t.Run(string(tc.context.Format), func(t *testing.T) {
 			var out bytes.Buffer
 			tc.context.Output = &out
@@ -365,7 +364,6 @@ func TestImageContextWriteWithNoImage(t *testing.T) {
 	}
 
 	for _, tc := range cases {
-		tc := tc
 		t.Run(string(tc.context.Format), func(t *testing.T) {
 			err := ImageWrite(tc.context, images)
 			assert.NilError(t, err)