linter: enable wastedassign

Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

.golangci.yml

@@ -65,7 +65,6 @@ linters:
     - errchkjson
     - maintidx
     - nilerr
-    - wastedassign
     - nilnil
 linters-settings:
   errcheck:

cmd/podman/common/create.go

@@ -721,7 +721,7 @@ func DefineCreateFlags(cmd *cobra.Command, cf *entities.ContainerCreateOptions,
 			"Optional parent cgroup for the container",
 		)
 		_ = cmd.RegisterFlagCompletionFunc(cgroupParentFlagName, completion.AutocompleteDefault)
-		conmonPidfileFlagName := ""
+		var conmonPidfileFlagName string
 		if !isInfra {
 			conmonPidfileFlagName = "conmon-pidfile"
 		} else {
@@ -734,7 +734,7 @@ func DefineCreateFlags(cmd *cobra.Command, cf *entities.ContainerCreateOptions,
 		)
 		_ = cmd.RegisterFlagCompletionFunc(conmonPidfileFlagName, completion.AutocompleteDefault)
 
-		entrypointFlagName := ""
+		var entrypointFlagName string
 		if !isInfra {
 			entrypointFlagName = "entrypoint"
 		} else {

cmd/podman/containers/clone.go

@@ -58,9 +58,8 @@ func clone(cmd *cobra.Command, args []string) error {
 	case 3:
 		ctrClone.CreateOpts.Name = args[1]
 		ctrClone.Image = args[2]
-		rawImageName := ""
 		if !cliVals.RootFS {
-			rawImageName = args[0]
+			rawImageName := args[0]
 			name, err := PullImage(ctrClone.Image, ctrClone.CreateOpts)
 			if err != nil {
 				return err

cmd/podman/images/build.go

@@ -375,7 +375,7 @@ func buildFlagsWrapperToOptions(c *cobra.Command, contextDir string, flags *buil
 		}
 	}
 
-	cleanTmpFile := false
+	var cleanTmpFile bool
 	flags.Authfile, cleanTmpFile = buildahUtil.MirrorToTempFileIfPathIsDescriptor(flags.Authfile)
 	if cleanTmpFile {
 		defer os.Remove(flags.Authfile)
@@ -474,7 +474,7 @@ func buildFlagsWrapperToOptions(c *cobra.Command, contextDir string, flags *buil
 		return nil, err
 	}
 
-	format := ""
+	var format string
 	flags.Format = strings.ToLower(flags.Format)
 	switch {
 	case strings.HasPrefix(flags.Format, buildahDefine.OCI):

cmd/podman/images/scp.go

@@ -105,7 +105,7 @@ func scp(cmd *cobra.Command, args []string) (finalErr error) {
 	}
 	locations := []*entities.ImageScpOptions{}
 	cliConnections := []string{}
-	flipConnections := false
+	var flipConnections bool
 	for _, arg := range args {
 		loc, connect, err := parseImageSCPArg(arg)
 		if err != nil {
@@ -233,7 +233,7 @@ func loadToRemote(localFile string, tag string, url *urlP.URL, iden string) (str
 		errOut := strconv.Itoa(int(n)) + " Bytes copied before error"
 		return " ", errors.Wrapf(err, errOut)
 	}
-	run := ""
+	var run string
 	if tag != "" {
 		return "", errors.Wrapf(define.ErrInvalidArg, "Renaming of an image is currently not supported")
 	}

cmd/podman/images/search.go

@@ -105,7 +105,7 @@ func searchFlags(cmd *cobra.Command) {
 
 // imageSearch implements the command for searching images.
 func imageSearch(cmd *cobra.Command, args []string) error {
-	searchTerm := ""
+	var searchTerm string
 	switch len(args) {
 	case 1:
 		searchTerm = args[0]

libpod/oci_conmon_linux.go

@@ -1596,7 +1596,7 @@ func readConmonPipeData(runtimeName string, pipe *os.File, ociLog string) (int,
 		ch <- syncStruct{si: si}
 	}()
 
-	data := -1
+	data := -1 //nolint: wastedassign
 	select {
 	case ss := <-ch:
 		if ss.err != nil {

pkg/specgen/generate/config_linux.go

@@ -262,8 +262,8 @@ func addDevice(g *generate.Generator, device string) error {
 
 // ParseDevice parses device mapping string to a src, dest & permissions string
 func ParseDevice(device string) (string, string, string, error) { //nolint
-	src := ""
-	dst := ""
+	var src string
+	var dst string
 	permissions := "rwm"
 	arr := strings.Split(device, ":")
 	switch len(arr) {

pkg/specgenutil/specgen.go

@@ -847,7 +847,8 @@ func makeHealthCheckFromCli(inCmd, interval string, retries uint, timeout, start
 	if len(cmdArr) == 0 {
 		return nil, errors.New("Must define a healthcheck command for all healthchecks")
 	}
-	concat := ""
+
+	var concat string
 	if cmdArr[0] == "CMD" || cmdArr[0] == "none" { // this is for compat, we are already split properly for most compat cases
 		cmdArr = strings.Fields(inCmd)
 	} else if cmdArr[0] != "CMD-SHELL" { // this is for podman side of things, won't contain the keywords

pkg/systemd/dbus.go

@@ -24,7 +24,6 @@ func IsSystemdSessionValid(uid int) bool {
 
 	if rootless.IsRootless() {
 		conn, err = GetLogindConnection(rootless.GetRootlessUID())
-		object = conn.Object(dbusDest, godbus.ObjectPath(dbusPath))
 		if err != nil {
 			//unable to fetch systemd object for logind
 			logrus.Debugf("systemd-logind: %s", err)

pkg/util/camelcase/camelcase.go

@@ -51,10 +51,10 @@ func Split(src string) (entries []string) {
 	}
 	entries = []string{}
 	var runes [][]rune
-	lastClass := 0
-	class := 0
+	var lastClass int
 	// split into fields based on class of unicode character
 	for _, r := range src {
+		var class int
 		switch {
 		case unicode.IsLower(r):
 			class = 1