Add deadcode linter

Signed-off-by: Sascha Grunert <sgrunert@suse.com>

12 files changed, 27 insertions, 203 deletions

diff --git a/.golangci.yml b/.golangci.yml
index f0ccd5a77..42c78e9bc 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -5,10 +5,10 @@ run:
 linters:
   disable-all: true
   enable:
+    - deadcode
     - depguard
     - gofmt
     - typecheck
-    # - deadcode
     # - dupl
     # - errcheck
     # - gochecknoglobals
diff --git a/cmd/podman/common.go b/cmd/podman/common.go
index 10fed053e..f4d128df2 100644
--- a/cmd/podman/common.go
+++ b/cmd/podman/common.go
@@ -10,17 +10,13 @@ import (
 	"github.com/containers/libpod/cmd/podman/cliconfig"
 	"github.com/containers/libpod/libpod"
 	"github.com/containers/libpod/pkg/rootless"
-	"github.com/containers/storage"
 	"github.com/fatih/camelcase"
 	jsoniter "github.com/json-iterator/go"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 )
 
-var (
-	stores = make(map[storage.Store]struct{})
-	json   = jsoniter.ConfigCompatibleWithStandardLibrary
-)
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
 
 const (
 	idTruncLength = 12
diff --git a/cmd/podman/common_test.go b/cmd/podman/common_test.go
deleted file mode 100644
index a24173003..000000000
--- a/cmd/podman/common_test.go
+++ /dev/null
@@ -1,15 +0,0 @@
-package main
-
-import (
-	"os/user"
-	"testing"
-)
-
-func skipTestIfNotRoot(t *testing.T) {
-	u, err := user.Current()
-	if err != nil {
-		t.Skip("Could not determine user.  Running without root may cause tests to fail")
-	} else if u.Uid != "0" {
-		t.Skip("tests will fail unless run as root")
-	}
-}
diff --git a/cmd/podman/pod_ps.go b/cmd/podman/pod_ps.go
index a956882cf..d0cc6aa12 100644
--- a/cmd/podman/pod_ps.go
+++ b/cmd/podman/pod_ps.go
@@ -20,7 +20,6 @@ import (
 )
 
 const (
-	STOPPED      = "Stopped"
 	RUNNING      = "Running"
 	PAUSED       = "Paused"
 	EXITED       = "Exited"
diff --git a/cmd/podman/pod_stats.go b/cmd/podman/pod_stats.go
index 36b0b95ed..744602268 100644
--- a/cmd/podman/pod_stats.go
+++ b/cmd/podman/pod_stats.go
@@ -298,17 +298,3 @@ func outputJson(stats []*adapter.PodContainerStats) error {
 	fmt.Println(string(b))
 	return nil
 }
-
-func getPodsByList(podList []string, r *libpod.Runtime) ([]*libpod.Pod, error) {
-	var (
-		pods []*libpod.Pod
-	)
-	for _, p := range podList {
-		pod, err := r.LookupPod(p)
-		if err != nil {
-			return nil, err
-		}
-		pods = append(pods, pod)
-	}
-	return pods, nil
-}
diff --git a/cmd/podman/ps.go b/cmd/podman/ps.go
index 71c8dee97..b25475fa8 100644
--- a/cmd/podman/ps.go
+++ b/cmd/podman/ps.go
@@ -19,35 +19,31 @@ import (
 	"github.com/containers/libpod/libpod"
 	"github.com/containers/libpod/pkg/rootless"
 	"github.com/containers/libpod/pkg/util"
-	"github.com/cri-o/ocicni/pkg/ocicni"
 	"github.com/docker/go-units"
 	"github.com/opentracing/opentracing-go"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
-	"k8s.io/apimachinery/pkg/fields"
 )
 
 const (
-	mountTruncLength = 12
-	hid              = "CONTAINER ID"
-	himage           = "IMAGE"
-	hcommand         = "COMMAND"
-	hcreated         = "CREATED"
-	hstatus          = "STATUS"
-	hports           = "PORTS"
-	hnames           = "NAMES"
-	hsize            = "SIZE"
-	hinfra           = "IS INFRA"
-	hpod             = "POD"
-	nspid            = "PID"
-	nscgroup         = "CGROUPNS"
-	nsipc            = "IPC"
-	nsmnt            = "MNT"
-	nsnet            = "NET"
-	nspidns          = "PIDNS"
-	nsuserns         = "USERNS"
-	nsuts            = "UTS"
+	hid      = "CONTAINER ID"
+	himage   = "IMAGE"
+	hcommand = "COMMAND"
+	hcreated = "CREATED"
+	hstatus  = "STATUS"
+	hports   = "PORTS"
+	hnames   = "NAMES"
+	hsize    = "SIZE"
+	hpod     = "POD"
+	nspid    = "PID"
+	nscgroup = "CGROUPNS"
+	nsipc    = "IPC"
+	nsmnt    = "MNT"
+	nsnet    = "NET"
+	nspidns  = "PIDNS"
+	nsuserns = "USERNS"
+	nsuts    = "UTS"
 )
 
 type psTemplateParams struct {
@@ -74,34 +70,6 @@ type psTemplateParams struct {
 	IsInfra       bool
 }
 
-// psJSONParams is used as a base structure for the psParams
-// If template output is requested, psJSONParams will be converted to
-// psTemplateParams.
-// psJSONParams will be populated by data from libpod.Container,
-// the members of the struct are the sama data types as their sources.
-type psJSONParams struct {
-	ID               string                `json:"id"`
-	Image            string                `json:"image"`
-	ImageID          string                `json:"image_id"`
-	Command          []string              `json:"command"`
-	ExitCode         int32                 `json:"exitCode"`
-	Exited           bool                  `json:"exited"`
-	CreatedAt        time.Time             `json:"createdAt"`
-	StartedAt        time.Time             `json:"startedAt"`
-	ExitedAt         time.Time             `json:"exitedAt"`
-	Status           string                `json:"status"`
-	PID              int                   `json:"PID"`
-	Ports            []ocicni.PortMapping  `json:"ports"`
-	Size             *shared.ContainerSize `json:"size,omitempty"`
-	Names            string                `json:"names"`
-	Labels           fields.Set            `json:"labels"`
-	Mounts           []string              `json:"mounts"`
-	ContainerRunning bool                  `json:"ctrRunning"`
-	Namespaces       *shared.Namespace     `json:"namespace,omitempty"`
-	Pod              string                `json:"pod,omitempty"`
-	IsInfra          bool                  `json:"infra"`
-}
-
 // Type declaration and functions for sorting the PS output
 type psSorted []shared.PsContainerOutput
 
@@ -447,57 +415,6 @@ func sortPsOutput(sortBy string, psOutput psSorted) (psSorted, error) {
 	return psOutput, nil
 }
 
-// getLabels converts the labels to a string of the form "key=value, key2=value2"
-func formatLabels(labels map[string]string) string {
-	var arr []string
-	if len(labels) > 0 {
-		for key, val := range labels {
-			temp := key + "=" + val
-			arr = append(arr, temp)
-		}
-		return strings.Join(arr, ",")
-	}
-	return ""
-}
-
-// getMounts converts the volumes mounted to a string of the form "mount1, mount2"
-// it truncates it if noTrunc is false
-func getMounts(mounts []string, noTrunc bool) string {
-	return strings.Join(getMountsArray(mounts, noTrunc), ",")
-}
-
-func getMountsArray(mounts []string, noTrunc bool) []string {
-	var arr []string
-	if len(mounts) == 0 {
-		return mounts
-	}
-	for _, mount := range mounts {
-		splitArr := strings.Split(mount, ":")
-		if len(splitArr[0]) > mountTruncLength && !noTrunc {
-			arr = append(arr, splitArr[0][:mountTruncLength]+"...")
-			continue
-		}
-		arr = append(arr, splitArr[0])
-	}
-	return arr
-}
-
-// portsToString converts the ports used to a string of the from "port1, port2"
-func portsToString(ports []ocicni.PortMapping) string {
-	var portDisplay []string
-	if len(ports) == 0 {
-		return ""
-	}
-	for _, v := range ports {
-		hostIP := v.HostIP
-		if hostIP == "" {
-			hostIP = "0.0.0.0"
-		}
-		portDisplay = append(portDisplay, fmt.Sprintf("%s:%d->%d/%s", hostIP, v.HostPort, v.ContainerPort, v.Protocol))
-	}
-	return strings.Join(portDisplay, ", ")
-}
-
 func printFormat(format string, containers []shared.PsContainerOutput) error {
 	// return immediately if no containers are present
 	if len(containers) == 0 {
diff --git a/cmd/podman/run_test.go b/cmd/podman/run_test.go
index 0bf9cb4d9..dea8eb7a2 100644
--- a/cmd/podman/run_test.go
+++ b/cmd/podman/run_test.go
@@ -18,7 +18,6 @@ import (
 
 var (
 	sysInfo = sysinfo.New(true)
-	cmd     = []string{"podman", "test", "alpine"}
 	CLI     *cliconfig.PodmanCommand
 )
 
diff --git a/cmd/podman/search.go b/cmd/podman/search.go
index e614887fc..f72c82b43 100644
--- a/cmd/podman/search.go
+++ b/cmd/podman/search.go
@@ -12,11 +12,6 @@ import (
 	"github.com/spf13/cobra"
 )
 
-const (
-	descriptionTruncLength = 44
-	maxQueries             = 25
-)
-
 var (
 	searchCommand     cliconfig.SearchValues
 	searchDescription = `Search registries for a given image. Can search all the default registries or a specific registry.
diff --git a/cmd/podman/shared/create.go b/cmd/podman/shared/create.go
index d927e5bf6..39af8ddd5 100644
--- a/cmd/podman/shared/create.go
+++ b/cmd/podman/shared/create.go
@@ -35,11 +35,6 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-// getContext returns a non-nil, empty context
-func getContext() context.Context {
-	return context.TODO()
-}
-
 func CreateContainer(ctx context.Context, c *cliconfig.PodmanCommand, runtime *libpod.Runtime) (*libpod.Container, *cc.CreateConfig, error) {
 	var (
 		healthCheck *manifest.Schema2HealthConfig
diff --git a/cmd/podman/trust_set_show.go b/cmd/podman/trust_set_show.go
index 626d27aae..cd6c4897e 100644
--- a/cmd/podman/trust_set_show.go
+++ b/cmd/podman/trust_set_show.go
@@ -7,7 +7,6 @@ import (
 	"strings"
 
 	"github.com/containers/buildah/pkg/formats"
-	"github.com/containers/image/types"
 	"github.com/containers/libpod/cmd/podman/cliconfig"
 	"github.com/containers/libpod/cmd/podman/libpodruntime"
 	"github.com/containers/libpod/libpod/image"
@@ -237,10 +236,6 @@ func isValidTrustType(t string) bool {
 	return false
 }
 
-func getDefaultPolicyPath() string {
-	return trust.DefaultPolicyPath(&types.SystemContext{})
-}
-
 func getPolicyJSON(policyContentStruct trust.PolicyContent, systemRegistriesDirPath string) (map[string]map[string]interface{}, error) {
 	registryConfigs, err := trust.LoadAndMergeConfig(systemRegistriesDirPath)
 	if err != nil {
diff --git a/cmd/podman/utils.go b/cmd/podman/utils.go
index 45d081512..2327a943a 100644
--- a/cmd/podman/utils.go
+++ b/cmd/podman/utils.go
@@ -7,7 +7,6 @@ import (
 	"os"
 	gosignal "os/signal"
 
-	"github.com/containers/libpod/cmd/podman/cliconfig"
 	"github.com/containers/libpod/libpod"
 	"github.com/docker/docker/pkg/signal"
 	"github.com/docker/docker/pkg/term"
@@ -159,47 +158,6 @@ func (f *RawTtyFormatter) Format(entry *logrus.Entry) ([]byte, error) {
 	return bytes, err
 }
 
-// For pod commands that have a latest and all flag, getPodsFromContext gets
-// pods the user specifies. If there's an error before getting pods, the pods slice
-// will be empty and error will be not nil. If an error occured after, the pod slice
-// will hold all of the successful pods, and error will hold the last error.
-// The remaining errors will be logged. On success, pods will hold all pods and
-// error will be nil.
-func getPodsFromContext(c *cliconfig.PodmanCommand, r *libpod.Runtime) ([]*libpod.Pod, error) {
-	args := c.InputArgs
-	var pods []*libpod.Pod
-	var lastError error
-	var err error
-
-	if c.Bool("all") {
-		pods, err = r.GetAllPods()
-		if err != nil {
-			return nil, errors.Wrapf(err, "unable to get running pods")
-		}
-	}
-
-	if c.Bool("latest") {
-		pod, err := r.GetLatestPod()
-		if err != nil {
-			return nil, errors.Wrapf(err, "unable to get latest pod")
-		}
-		pods = append(pods, pod)
-	}
-
-	for _, i := range args {
-		pod, err := r.LookupPod(i)
-		if err != nil {
-			if lastError != nil {
-				logrus.Errorf("%q", lastError)
-			}
-			lastError = errors.Wrapf(err, "unable to find pod %s", i)
-			continue
-		}
-		pods = append(pods, pod)
-	}
-	return pods, lastError
-}
-
 //printParallelOutput takes the map of parallel worker results and outputs them
 // to stdout
 func printParallelOutput(m map[string]error, errCount int) error {
diff --git a/test/e2e/common_test.go b/test/e2e/common_test.go
index b20b3b37e..0b3db32f4 100644
--- a/test/e2e/common_test.go
+++ b/test/e2e/common_test.go
@@ -22,15 +22,14 @@ import (
 )
 
 var (
-	PODMAN_BINARY      string
-	CONMON_BINARY      string
-	CNI_CONFIG_DIR     string
-	RUNC_BINARY        string
-	INTEGRATION_ROOT   string
-	CGROUP_MANAGER     = "systemd"
-	ARTIFACT_DIR       = "/tmp/.artifacts"
-	RESTORE_IMAGES     = []string{ALPINE, BB}
-	defaultWaitTimeout = 90
+	PODMAN_BINARY    string
+	CONMON_BINARY    string
+	CNI_CONFIG_DIR   string
+	RUNC_BINARY      string
+	INTEGRATION_ROOT string
+	CGROUP_MANAGER   = "systemd"
+	ARTIFACT_DIR     = "/tmp/.artifacts"
+	RESTORE_IMAGES   = []string{ALPINE, BB}
 )
 
 // PodmanTestIntegration struct for command line options