golangci-lint: govet: enable shadow check

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

.golangci.yml

@@ -42,7 +42,10 @@ linters-settings:
   gocyclo:
     min-complexity: 16
   govet:
-    check-shadowing: false
+    check-shadowing: true
+    settings:
+      shadow:
+        strict: true
   lll:
     line-length: 200
   nakedret:
@@ -128,6 +131,12 @@ issues:
         - errcheck
         - gosec
 
+    # Allow "err" and "ok" vars to shadow existing declarations, otherwise we get too many false positives.
+    - text: '^shadow: declaration of "(err|ok)" shadows declaration'
+      linters:
+        - govet
+
+
   # Maximum issues count per one linter. Set to 0 to disable. Default is 50.
   max-issues-per-linter: 0
 

cli/command/container/opts_test.go

@@ -198,7 +198,7 @@ func TestParseWithVolumes(t *testing.T) {
 		t.Fatalf("Error parsing volume flags, %q should not mount-bind anything. Received %v", tryit, hostConfig.Binds)
 	} else if _, exists := config.Volumes[arr[0]]; !exists {
 		t.Fatalf("Error parsing volume flags, %s is missing from volumes. Received %v", arr[0], config.Volumes)
-	} else if _, exists := config.Volumes[arr[1]]; !exists {
+	} else if _, exists := config.Volumes[arr[1]]; !exists { //nolint:govet // ignore shadow-check
 		t.Fatalf("Error parsing volume flags, %s is missing from volumes. Received %v", arr[1], config.Volumes)
 	}
 

cli/command/manifest/push.go

@@ -77,13 +77,13 @@ func runPush(dockerCli command.Cli, opts pushOpts) error {
 		return errors.Errorf("%s not found", targetRef)
 	}
 
-	pushRequest, err := buildPushRequest(manifests, targetRef, opts.insecure)
+	req, err := buildPushRequest(manifests, targetRef, opts.insecure)
 	if err != nil {
 		return err
 	}
 
 	ctx := context.Background()
-	if err := pushList(ctx, dockerCli, pushRequest); err != nil {
+	if err := pushList(ctx, dockerCli, req); err != nil {
 		return err
 	}
 	if opts.purge {

cli/command/manifest/push_test.go

@@ -49,17 +49,17 @@ func TestManifestPushErrors(t *testing.T) {
 }
 
 func TestManifestPush(t *testing.T) {
-	store := store.NewStore(t.TempDir())
+	manifestStore := store.NewStore(t.TempDir())
 
 	registry := newFakeRegistryClient()
 
 	cli := test.NewFakeCli(nil)
-	cli.SetManifestStore(store)
+	cli.SetManifestStore(manifestStore)
 	cli.SetRegistryClient(registry)
 
 	namedRef := ref(t, "alpine:3.0")
 	imageManifest := fullImageManifest(t, namedRef)
-	err := store.Save(ref(t, "list:v1"), namedRef, imageManifest)
+	err := manifestStore.Save(ref(t, "list:v1"), namedRef, imageManifest)
 	assert.NilError(t, err)
 
 	cmd := newPushListCommand(cli)

cli/command/service/progress/progress_test.go

@@ -70,7 +70,7 @@ func TestReplicatedProgressUpdaterOneReplica(t *testing.T) {
 	}
 
 	p := &mockProgress{}
-	updaterTester := updaterTester{
+	ut := updaterTester{
 		t: t,
 		updater: &replicatedProgressUpdater{
 			progressOut: p,
@@ -82,7 +82,7 @@ func TestReplicatedProgressUpdaterOneReplica(t *testing.T) {
 
 	tasks := []swarm.Task{}
 
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "overall progress", Action: "0 out of 1 tasks"},
 			{ID: "1/1", Action: " "},
@@ -97,14 +97,14 @@ func TestReplicatedProgressUpdaterOneReplica(t *testing.T) {
 			DesiredState: swarm.TaskStateShutdown,
 			Status:       swarm.TaskStatus{State: swarm.TaskStateNew},
 		})
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "overall progress", Action: "0 out of 1 tasks"},
 		})
 
 	// Task with valid DesiredState and State updates progress bar
 	tasks[0].DesiredState = swarm.TaskStateRunning
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "1/1", Action: "new      ", Current: 1, Total: 9, HideCounts: true},
 			{ID: "overall progress", Action: "0 out of 1 tasks"},
@@ -113,7 +113,7 @@ func TestReplicatedProgressUpdaterOneReplica(t *testing.T) {
 	// If the task exposes an error, we should show that instead of the
 	// progress bar.
 	tasks[0].Status.Err = "something is wrong"
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "1/1", Action: "something is wrong"},
 			{ID: "overall progress", Action: "0 out of 1 tasks"},
@@ -122,7 +122,7 @@ func TestReplicatedProgressUpdaterOneReplica(t *testing.T) {
 	// When the task reaches running, update should return true
 	tasks[0].Status.Err = ""
 	tasks[0].Status.State = swarm.TaskStateRunning
-	updaterTester.testUpdater(tasks, true,
+	ut.testUpdater(tasks, true,
 		[]progress.Progress{
 			{ID: "1/1", Action: "running  ", Current: 9, Total: 9, HideCounts: true},
 			{ID: "overall progress", Action: "1 out of 1 tasks"},
@@ -131,7 +131,7 @@ func TestReplicatedProgressUpdaterOneReplica(t *testing.T) {
 	// If the task fails, update should return false again
 	tasks[0].Status.Err = "task failed"
 	tasks[0].Status.State = swarm.TaskStateFailed
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "1/1", Action: "task failed"},
 			{ID: "overall progress", Action: "0 out of 1 tasks"},
@@ -147,7 +147,7 @@ func TestReplicatedProgressUpdaterOneReplica(t *testing.T) {
 			DesiredState: swarm.TaskStateRunning,
 			Status:       swarm.TaskStatus{State: swarm.TaskStateRunning},
 		})
-	updaterTester.testUpdater(tasks, true,
+	ut.testUpdater(tasks, true,
 		[]progress.Progress{
 			{ID: "1/1", Action: "running  ", Current: 9, Total: 9, HideCounts: true},
 			{ID: "overall progress", Action: "1 out of 1 tasks"},
@@ -162,7 +162,7 @@ func TestReplicatedProgressUpdaterOneReplica(t *testing.T) {
 			DesiredState: swarm.TaskStateRunning,
 			Status:       swarm.TaskStatus{State: swarm.TaskStatePreparing},
 		})
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "1/1", Action: "preparing", Current: 6, Total: 9, HideCounts: true},
 			{ID: "overall progress", Action: "0 out of 1 tasks"},
@@ -183,7 +183,7 @@ func TestReplicatedProgressUpdaterManyReplicas(t *testing.T) {
 	}
 
 	p := &mockProgress{}
-	updaterTester := updaterTester{
+	ut := updaterTester{
 		t: t,
 		updater: &replicatedProgressUpdater{
 			progressOut: p,
@@ -196,7 +196,7 @@ func TestReplicatedProgressUpdaterManyReplicas(t *testing.T) {
 	tasks := []swarm.Task{}
 
 	// No per-task progress bars because there are too many replicas
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "overall progress", Action: fmt.Sprintf("0 out of %d tasks", replicas)},
 			{ID: "overall progress", Action: fmt.Sprintf("0 out of %d tasks", replicas)},
@@ -215,13 +215,13 @@ func TestReplicatedProgressUpdaterManyReplicas(t *testing.T) {
 		if i%2 == 1 {
 			tasks[i].NodeID = "b"
 		}
-		updaterTester.testUpdater(tasks, false,
+		ut.testUpdater(tasks, false,
 			[]progress.Progress{
 				{ID: "overall progress", Action: fmt.Sprintf("%d out of %d tasks", i, replicas)},
 			})
 
 		tasks[i].Status.State = swarm.TaskStateRunning
-		updaterTester.testUpdater(tasks, uint64(i) == replicas-1,
+		ut.testUpdater(tasks, uint64(i) == replicas-1,
 			[]progress.Progress{
 				{ID: "overall progress", Action: fmt.Sprintf("%d out of %d tasks", i+1, replicas)},
 			})
@@ -238,7 +238,7 @@ func TestGlobalProgressUpdaterOneNode(t *testing.T) {
 	}
 
 	p := &mockProgress{}
-	updaterTester := updaterTester{
+	ut := updaterTester{
 		t: t,
 		updater: &globalProgressUpdater{
 			progressOut: p,
@@ -250,7 +250,7 @@ func TestGlobalProgressUpdaterOneNode(t *testing.T) {
 
 	tasks := []swarm.Task{}
 
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "overall progress", Action: "waiting for new tasks"},
 		})
@@ -263,7 +263,7 @@ func TestGlobalProgressUpdaterOneNode(t *testing.T) {
 			DesiredState: swarm.TaskStateShutdown,
 			Status:       swarm.TaskStatus{State: swarm.TaskStateNew},
 		})
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "overall progress", Action: "0 out of 1 tasks"},
 			{ID: "overall progress", Action: "0 out of 1 tasks"},
@@ -271,7 +271,7 @@ func TestGlobalProgressUpdaterOneNode(t *testing.T) {
 
 	// Task with valid DesiredState and State updates progress bar
 	tasks[0].DesiredState = swarm.TaskStateRunning
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "a", Action: "new      ", Current: 1, Total: 9, HideCounts: true},
 			{ID: "overall progress", Action: "0 out of 1 tasks"},
@@ -280,7 +280,7 @@ func TestGlobalProgressUpdaterOneNode(t *testing.T) {
 	// If the task exposes an error, we should show that instead of the
 	// progress bar.
 	tasks[0].Status.Err = "something is wrong"
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "a", Action: "something is wrong"},
 			{ID: "overall progress", Action: "0 out of 1 tasks"},
@@ -289,7 +289,7 @@ func TestGlobalProgressUpdaterOneNode(t *testing.T) {
 	// When the task reaches running, update should return true
 	tasks[0].Status.Err = ""
 	tasks[0].Status.State = swarm.TaskStateRunning
-	updaterTester.testUpdater(tasks, true,
+	ut.testUpdater(tasks, true,
 		[]progress.Progress{
 			{ID: "a", Action: "running  ", Current: 9, Total: 9, HideCounts: true},
 			{ID: "overall progress", Action: "1 out of 1 tasks"},
@@ -298,7 +298,7 @@ func TestGlobalProgressUpdaterOneNode(t *testing.T) {
 	// If the task fails, update should return false again
 	tasks[0].Status.Err = "task failed"
 	tasks[0].Status.State = swarm.TaskStateFailed
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "a", Action: "task failed"},
 			{ID: "overall progress", Action: "0 out of 1 tasks"},
@@ -314,7 +314,7 @@ func TestGlobalProgressUpdaterOneNode(t *testing.T) {
 			DesiredState: swarm.TaskStateRunning,
 			Status:       swarm.TaskStatus{State: swarm.TaskStateRunning},
 		})
-	updaterTester.testUpdater(tasks, true,
+	ut.testUpdater(tasks, true,
 		[]progress.Progress{
 			{ID: "a", Action: "running  ", Current: 9, Total: 9, HideCounts: true},
 			{ID: "overall progress", Action: "1 out of 1 tasks"},
@@ -329,7 +329,7 @@ func TestGlobalProgressUpdaterOneNode(t *testing.T) {
 			DesiredState: swarm.TaskStateRunning,
 			Status:       swarm.TaskStatus{State: swarm.TaskStatePreparing},
 		})
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "a", Action: "preparing", Current: 6, Total: 9, HideCounts: true},
 			{ID: "overall progress", Action: "0 out of 1 tasks"},
@@ -348,7 +348,7 @@ func TestGlobalProgressUpdaterManyNodes(t *testing.T) {
 	}
 
 	p := &mockProgress{}
-	updaterTester := updaterTester{
+	ut := updaterTester{
 		t: t,
 		updater: &globalProgressUpdater{
 			progressOut: p,
@@ -359,12 +359,12 @@ func TestGlobalProgressUpdaterManyNodes(t *testing.T) {
 	}
 
 	for i := 0; i != nodes; i++ {
-		updaterTester.activeNodes[strconv.Itoa(i)] = struct{}{}
+		ut.activeNodes[strconv.Itoa(i)] = struct{}{}
 	}
 
 	tasks := []swarm.Task{}
 
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "overall progress", Action: "waiting for new tasks"},
 		})
@@ -379,7 +379,7 @@ func TestGlobalProgressUpdaterManyNodes(t *testing.T) {
 			})
 	}
 
-	updaterTester.testUpdater(tasks, false,
+	ut.testUpdater(tasks, false,
 		[]progress.Progress{
 			{ID: "overall progress", Action: fmt.Sprintf("0 out of %d tasks", nodes)},
 			{ID: "overall progress", Action: fmt.Sprintf("0 out of %d tasks", nodes)},
@@ -387,7 +387,7 @@ func TestGlobalProgressUpdaterManyNodes(t *testing.T) {
 
 	for i := 0; i != nodes; i++ {
 		tasks[i].Status.State = swarm.TaskStateRunning
-		updaterTester.testUpdater(tasks, i == nodes-1,
+		ut.testUpdater(tasks, i == nodes-1,
 			[]progress.Progress{
 				{ID: "overall progress", Action: fmt.Sprintf("%d out of %d tasks", i+1, nodes)},
 			})

cli/command/system/info.go

@@ -35,7 +35,7 @@ type clientInfo struct {
 	Warnings []string
 }
 
-type info struct {
+type dockerInfo struct {
 	// This field should/could be ServerInfo but is anonymous to
 	// preserve backwards compatibility in the JSON rendering
 	// which has ServerInfo immediately within the top-level
@@ -48,7 +48,7 @@ type info struct {
 	ClientErrors []string    `json:",omitempty"`
 }
 
-func (i *info) clientPlatform() string {
+func (i *dockerInfo) clientPlatform() string {
 	if i.ClientInfo != nil && i.ClientInfo.Platform != nil {
 		return i.ClientInfo.Platform.Name
 	}
@@ -78,7 +78,7 @@ func NewInfoCommand(dockerCli command.Cli) *cobra.Command {
 }
 
 func runInfo(cmd *cobra.Command, dockerCli command.Cli, opts *infoOptions) error {
-	info := info{
+	info := dockerInfo{
 		ClientInfo: &clientInfo{
 			// Don't pass a dockerCLI to newClientVersion(), because we currently
 			// don't include negotiated API version, and want to avoid making an
@@ -129,7 +129,7 @@ var placeHolders = regexp.MustCompile(`\.[a-zA-Z]`)
 // If only client-side information is used in the template, we can skip
 // connecting to the daemon. This allows (e.g.) to only get cli-plugin
 // information, without also making a (potentially expensive) API call.
-func needsServerInfo(template string, info info) bool {
+func needsServerInfo(template string, info dockerInfo) bool {
 	if len(template) == 0 || placeHolders.FindString(template) == "" {
 		// The template is empty, or does not contain formatting fields
 		// (e.g. `table` or `raw` or `{{ json .}}`). Assume we need server-side
@@ -160,7 +160,7 @@ func needsServerInfo(template string, info info) bool {
 	return err != nil
 }
 
-func prettyPrintInfo(streams command.Streams, info info) error {
+func prettyPrintInfo(streams command.Streams, info dockerInfo) error {
 	// Only append the platform info if it's not empty, to prevent printing a trailing space.
 	if p := info.clientPlatform(); p != "" {
 		fprintln(streams.Out(), "Client:", p)
@@ -215,7 +215,7 @@ func prettyPrintClientInfo(streams command.Streams, info clientInfo) {
 }
 
 //nolint:gocyclo
-func prettyPrintServerInfo(streams command.Streams, info *info) []error {
+func prettyPrintServerInfo(streams command.Streams, info *dockerInfo) []error {
 	var errs []error
 	output := streams.Out()
 
@@ -452,7 +452,7 @@ func printSwarmInfo(output io.Writer, info system.Info) {
 	}
 }
 
-func printServerWarnings(stdErr io.Writer, info *info) {
+func printServerWarnings(stdErr io.Writer, info *dockerInfo) {
 	if versions.LessThan(info.ClientInfo.APIVersion, "1.42") {
 		printSecurityOptionsWarnings(stdErr, *info.Info)
 	}
@@ -530,7 +530,7 @@ func printServerWarningsLegacy(stdErr io.Writer, info system.Info) {
 	}
 }
 
-func formatInfo(output io.Writer, info info, format string) error {
+func formatInfo(output io.Writer, info dockerInfo, format string) error {
 	if format == formatter.JSONFormatKey {
 		format = formatter.JSONFormat
 	}

cli/command/system/info_test.go

@@ -267,7 +267,7 @@ func TestPrettyPrintInfo(t *testing.T) {
 
 	for _, tc := range []struct {
 		doc        string
-		dockerInfo info
+		dockerInfo dockerInfo
 
 		prettyGolden   string
 		warningsGolden string
@@ -276,7 +276,7 @@ func TestPrettyPrintInfo(t *testing.T) {
 	}{
 		{
 			doc: "info without swarm",
-			dockerInfo: info{
+			dockerInfo: dockerInfo{
 				Info: &sampleInfoNoSwarm,
 				ClientInfo: &clientInfo{
 					clientVersion: clientVersion{
@@ -292,7 +292,7 @@ func TestPrettyPrintInfo(t *testing.T) {
 		},
 		{
 			doc: "info with plugins",
-			dockerInfo: info{
+			dockerInfo: dockerInfo{
 				Info: &sampleInfoNoSwarm,
 				ClientInfo: &clientInfo{
 					clientVersion: clientVersion{Context: "default"},
@@ -305,7 +305,7 @@ func TestPrettyPrintInfo(t *testing.T) {
 		},
 		{
 			doc: "info with nil labels",
-			dockerInfo: info{
+			dockerInfo: dockerInfo{
 				Info:       &sampleInfoLabelsNil,
 				ClientInfo: &clientInfo{clientVersion: clientVersion{Context: "default"}},
 			},
@@ -313,7 +313,7 @@ func TestPrettyPrintInfo(t *testing.T) {
 		},
 		{
 			doc: "info with empty labels",
-			dockerInfo: info{
+			dockerInfo: dockerInfo{
 				Info:       &sampleInfoLabelsEmpty,
 				ClientInfo: &clientInfo{clientVersion: clientVersion{Context: "default"}},
 			},
@@ -321,7 +321,7 @@ func TestPrettyPrintInfo(t *testing.T) {
 		},
 		{
 			doc: "info with swarm",
-			dockerInfo: info{
+			dockerInfo: dockerInfo{
 				Info: &infoWithSwarm,
 				ClientInfo: &clientInfo{
 					clientVersion: clientVersion{Context: "default"},
@@ -333,7 +333,7 @@ func TestPrettyPrintInfo(t *testing.T) {
 		},
 		{
 			doc: "info with legacy warnings",
-			dockerInfo: info{
+			dockerInfo: dockerInfo{
 				Info: &infoWithWarningsLinux,
 				ClientInfo: &clientInfo{
 					clientVersion: clientVersion{
@@ -350,7 +350,7 @@ func TestPrettyPrintInfo(t *testing.T) {
 		},
 		{
 			doc: "info with daemon warnings",
-			dockerInfo: info{
+			dockerInfo: dockerInfo{
 				Info: &sampleInfoDaemonWarnings,
 				ClientInfo: &clientInfo{
 					clientVersion: clientVersion{
@@ -367,7 +367,7 @@ func TestPrettyPrintInfo(t *testing.T) {
 		},
 		{
 			doc: "errors for both",
-			dockerInfo: info{
+			dockerInfo: dockerInfo{
 				ServerErrors: []string{"a server error occurred"},
 				ClientErrors: []string{"a client error occurred"},
 			},
@@ -378,7 +378,7 @@ func TestPrettyPrintInfo(t *testing.T) {
 		},
 		{
 			doc: "bad security info",
-			dockerInfo: info{
+			dockerInfo: dockerInfo{
 				Info:         &sampleInfoBadSecurity,
 				ServerErrors: []string{"a server error occurred"},
 				ClientInfo:   &clientInfo{Debug: false},
@@ -424,7 +424,7 @@ func BenchmarkPrettyPrintInfo(b *testing.B) {
 	infoWithSwarm := sampleInfoNoSwarm
 	infoWithSwarm.Swarm = sampleSwarmInfo
 
-	dockerInfo := info{
+	info := dockerInfo{
 		Info: &infoWithSwarm,
 		ClientInfo: &clientInfo{
 			clientVersion: clientVersion{
@@ -439,7 +439,7 @@ func BenchmarkPrettyPrintInfo(b *testing.B) {
 
 	b.ReportAllocs()
 	for i := 0; i < b.N; i++ {
-		_ = prettyPrintInfo(cli, dockerInfo)
+		_ = prettyPrintInfo(cli, info)
 		cli.ResetOutputBuffers()
 	}
 }
@@ -470,7 +470,7 @@ func TestFormatInfo(t *testing.T) {
 		tc := tc
 		t.Run(tc.doc, func(t *testing.T) {
 			cli := test.NewFakeCli(&fakeClient{})
-			info := info{
+			info := dockerInfo{
 				Info:       &sampleInfoNoSwarm,
 				ClientInfo: &clientInfo{Debug: true},
 			}
@@ -531,7 +531,7 @@ func TestNeedsServerInfo(t *testing.T) {
 		},
 	}
 
-	inf := info{ClientInfo: &clientInfo{}}
+	inf := dockerInfo{ClientInfo: &clientInfo{}}
 	for _, tc := range tests {
 		tc := tc
 		t.Run(tc.doc, func(t *testing.T) {

cli/command/trust/key_load_test.go

@@ -114,10 +114,10 @@ var testKeys = map[string][]byte{
 func TestLoadKeyFromPath(t *testing.T) {
 	skip.If(t, runtime.GOOS == "windows")
 	for keyID, keyBytes := range testKeys {
-		privKeyID, privKeyFixture := keyID, keyBytes
+		keyID, keyBytes := keyID, keyBytes
 		t.Run(fmt.Sprintf("load-key-id-%s-from-path", keyID), func(t *testing.T) {
 			privKeyFilepath := filepath.Join(t.TempDir(), "privkey.pem")
-			assert.NilError(t, os.WriteFile(privKeyFilepath, privKeyFixture, notary.PrivNoExecPerms))
+			assert.NilError(t, os.WriteFile(privKeyFilepath, keyBytes, notary.PrivNoExecPerms))
 
 			keyStorageDir := t.TempDir()
 
@@ -135,7 +135,7 @@ func TestLoadKeyFromPath(t *testing.T) {
 			assert.Check(t, loadPrivKeyBytesToStore(privKeyBytes, privKeyImporters, privKeyFilepath, "signer-name", cannedPasswordRetriever))
 
 			// check that the appropriate ~/<trust_dir>/private/<key_id>.key file exists
-			expectedImportKeyPath := filepath.Join(keyStorageDir, notary.PrivDir, privKeyID+"."+notary.KeyExtension)
+			expectedImportKeyPath := filepath.Join(keyStorageDir, notary.PrivDir, keyID+"."+notary.KeyExtension)
 			_, err = os.Stat(expectedImportKeyPath)
 			assert.NilError(t, err)
 
@@ -152,7 +152,7 @@ func TestLoadKeyFromPath(t *testing.T) {
 
 			decryptedKey, err := tufutils.ParsePKCS8ToTufKey(keyPEM.Bytes, []byte(passwd))
 			assert.NilError(t, err)
-			fixturePEM, _ := pem.Decode(privKeyFixture)
+			fixturePEM, _ := pem.Decode(keyBytes)
 			assert.Check(t, is.DeepEqual(fixturePEM.Bytes, decryptedKey.Private()))
 		})
 	}
@@ -161,11 +161,11 @@ func TestLoadKeyFromPath(t *testing.T) {
 func TestLoadKeyTooPermissive(t *testing.T) {
 	skip.If(t, runtime.GOOS == "windows")
 	for keyID, keyBytes := range testKeys {
-		keyID, privKeyFixture := keyID, keyBytes
+		keyID, keyBytes := keyID, keyBytes
 		t.Run(fmt.Sprintf("load-key-id-%s-too-permissive", keyID), func(t *testing.T) {
 			privKeyDir := t.TempDir()
 			privKeyFilepath := filepath.Join(privKeyDir, "privkey477.pem")
-			assert.NilError(t, os.WriteFile(privKeyFilepath, privKeyFixture, 0o477))
+			assert.NilError(t, os.WriteFile(privKeyFilepath, keyBytes, 0o477))
 
 			// import the key to our keyStorageDir
 			_, err := getPrivKeyBytesFromPath(privKeyFilepath)
@@ -173,27 +173,27 @@ func TestLoadKeyTooPermissive(t *testing.T) {
 			assert.Error(t, err, expected)
 
 			privKeyFilepath = filepath.Join(privKeyDir, "privkey667.pem")
-			assert.NilError(t, os.WriteFile(privKeyFilepath, privKeyFixture, 0o677))
+			assert.NilError(t, os.WriteFile(privKeyFilepath, keyBytes, 0o677))
 
 			_, err = getPrivKeyBytesFromPath(privKeyFilepath)
 			expected = fmt.Sprintf("private key file %s must not be readable or writable by others", privKeyFilepath)
 			assert.Error(t, err, expected)
 
 			privKeyFilepath = filepath.Join(privKeyDir, "privkey777.pem")
-			assert.NilError(t, os.WriteFile(privKeyFilepath, privKeyFixture, 0o777))
+			assert.NilError(t, os.WriteFile(privKeyFilepath, keyBytes, 0o777))
 
 			_, err = getPrivKeyBytesFromPath(privKeyFilepath)
 			expected = fmt.Sprintf("private key file %s must not be readable or writable by others", privKeyFilepath)
 			assert.Error(t, err, expected)
 
 			privKeyFilepath = filepath.Join(privKeyDir, "privkey400.pem")
-			assert.NilError(t, os.WriteFile(privKeyFilepath, privKeyFixture, 0o400))
+			assert.NilError(t, os.WriteFile(privKeyFilepath, keyBytes, 0o400))
 
 			_, err = getPrivKeyBytesFromPath(privKeyFilepath)
 			assert.NilError(t, err)
 
 			privKeyFilepath = filepath.Join(privKeyDir, "privkey600.pem")
-			assert.NilError(t, os.WriteFile(privKeyFilepath, privKeyFixture, 0o600))
+			assert.NilError(t, os.WriteFile(privKeyFilepath, keyBytes, 0o600))
 
 			_, err = getPrivKeyBytesFromPath(privKeyFilepath)
 			assert.NilError(t, err)

cli/compose/template/template.go

@@ -6,17 +6,15 @@ import (
 	"strings"
 )
 
-var (
-	delimiter    = "\\$"
-	substitution = "[_a-z][_a-z0-9]*(?::?[-?][^}]*)?"
+const (
+	delimiter = "\\$"
+	subst     = "[_a-z][_a-z0-9]*(?::?[-?][^}]*)?"
 )
 
-var patternString = fmt.Sprintf(
+var defaultPattern = regexp.MustCompile(fmt.Sprintf(
 	"%s(?i:(?P<escaped>%s)|(?P<named>%s)|{(?P<braced>%s)}|(?P<invalid>))",
-	delimiter, delimiter, substitution, substitution,
-)
-
-var defaultPattern = regexp.MustCompile(patternString)
+	delimiter, delimiter, subst, subst,
+))
 
 // DefaultSubstituteFuncs contains the default SubstituteFunc used by the docker cli
 var DefaultSubstituteFuncs = []SubstituteFunc{