Bump github.com/urfave/cli/v2 from 2.3.0 to 2.27.1

Bumps [github.com/urfave/cli/v2](https://github.com/urfave/cli) from 2.3.0 to 2.27.1.
- [Release notes](https://github.com/urfave/cli/releases)
- [Changelog](https://github.com/urfave/cli/blob/main/docs/CHANGELOG.md)
- [Commits](https://github.com/urfave/cli/compare/v2.3.0...v2.27.1)

---
updated-dependencies:
- dependency-name: github.com/urfave/cli/v2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/urfave/cli/v2/flag_string_slice.go

@@ -4,13 +4,16 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
+	"strconv"
 	"strings"
 )
 
 // StringSlice wraps a []string to satisfy flag.Value
 type StringSlice struct {
 	slice      []string
+	separator  separatorSpec
 	hasBeenSet bool
+	keepSpace  bool
 }
 
 // NewStringSlice creates a *StringSlice with default values
@@ -18,6 +21,16 @@ func NewStringSlice(defaults ...string) *StringSlice {
 	return &StringSlice{slice: append([]string{}, defaults...)}
 }
 
+// clone allocate a copy of self object
+func (s *StringSlice) clone() *StringSlice {
+	n := &StringSlice{
+		slice:      make([]string, len(s.slice)),
+		hasBeenSet: s.hasBeenSet,
+	}
+	copy(n.slice, s.slice)
+	return n
+}
+
 // Set appends the string value to the list of values
 func (s *StringSlice) Set(value string) error {
 	if !s.hasBeenSet {
@@ -32,11 +45,20 @@ func (s *StringSlice) Set(value string) error {
 		return nil
 	}
 
-	s.slice = append(s.slice, value)
+	for _, t := range s.separator.flagSplitMultiValues(value) {
+		if !s.keepSpace {
+			t = strings.TrimSpace(t)
+		}
+		s.slice = append(s.slice, t)
+	}
 
 	return nil
 }
 
+func (s *StringSlice) WithSeparatorSpec(spec separatorSpec) {
+	s.separator = spec
+}
+
 // String returns a readable representation of this value (for usage defaults)
 func (s *StringSlice) String() string {
 	return fmt.Sprintf("%s", s.slice)
@@ -58,43 +80,12 @@ func (s *StringSlice) Get() interface{} {
 	return *s
 }
 
-// StringSliceFlag is a flag with type *StringSlice
-type StringSliceFlag struct {
-	Name        string
-	Aliases     []string
-	Usage       string
-	EnvVars     []string
-	FilePath    string
-	Required    bool
-	Hidden      bool
-	TakesFile   bool
-	Value       *StringSlice
-	DefaultText string
-	HasBeenSet  bool
-	Destination *StringSlice
-}
-
-// IsSet returns whether or not the flag has been set through env or file
-func (f *StringSliceFlag) IsSet() bool {
-	return f.HasBeenSet
-}
-
 // String returns a readable representation of this value
 // (for usage defaults)
 func (f *StringSliceFlag) String() string {
 	return FlagStringer(f)
 }
 
-// Names returns the names of the flag
-func (f *StringSliceFlag) Names() []string {
-	return flagNames(f.Name, f.Aliases)
-}
-
-// IsRequired returns whether or not the flag is required
-func (f *StringSliceFlag) IsRequired() bool {
-	return f.Required
-}
-
 // TakesValue returns true of the flag takes a value, otherwise false
 func (f *StringSliceFlag) TakesValue() bool {
 	return true
@@ -105,56 +96,101 @@ func (f *StringSliceFlag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *StringSliceFlag) GetCategory() string {
+	return f.Category
+}
+
 // GetValue returns the flags value as string representation and an empty
 // string if the flag takes no value at all.
 func (f *StringSliceFlag) GetValue() string {
-	if f.Value != nil {
-		return f.Value.String()
+	var defaultVals []string
+	if f.Value != nil && len(f.Value.Value()) > 0 {
+		for _, s := range f.Value.Value() {
+			if len(s) > 0 {
+				defaultVals = append(defaultVals, strconv.Quote(s))
+			}
+		}
 	}
-	return ""
+	return strings.Join(defaultVals, ", ")
+}
+
+// GetDefaultText returns the default text for this flag
+func (f *StringSliceFlag) GetDefaultText() string {
+	if f.DefaultText != "" {
+		return f.DefaultText
+	}
+	return f.GetValue()
+}
+
+// GetEnvVars returns the env vars for this flag
+func (f *StringSliceFlag) GetEnvVars() []string {
+	return f.EnvVars
+}
+
+// IsSliceFlag implements DocGenerationSliceFlag.
+func (f *StringSliceFlag) IsSliceFlag() bool {
+	return true
 }
 
 // Apply populates the flag given the flag set and environment
 func (f *StringSliceFlag) Apply(set *flag.FlagSet) error {
-
+	// apply any default
 	if f.Destination != nil && f.Value != nil {
 		f.Destination.slice = make([]string, len(f.Value.slice))
 		copy(f.Destination.slice, f.Value.slice)
-
 	}
 
-	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
-		if f.Value == nil {
-			f.Value = &StringSlice{}
-		}
-		destination := f.Value
-		if f.Destination != nil {
-			destination = f.Destination
-		}
+	// resolve setValue (what we will assign to the set)
+	var setValue *StringSlice
+	switch {
+	case f.Destination != nil:
+		setValue = f.Destination
+	case f.Value != nil:
+		setValue = f.Value.clone()
+	default:
+		setValue = new(StringSlice)
+		setValue.WithSeparatorSpec(f.separator)
+	}
 
-		for _, s := range strings.Split(val, ",") {
-			if err := destination.Set(strings.TrimSpace(s)); err != nil {
-				return fmt.Errorf("could not parse %q as string value for flag %s: %s", val, f.Name, err)
+	setValue.keepSpace = f.KeepSpace
+
+	if val, source, found := flagFromEnvOrFile(f.EnvVars, f.FilePath); found {
+		for _, s := range f.separator.flagSplitMultiValues(val) {
+			if !f.KeepSpace {
+				s = strings.TrimSpace(s)
+			}
+			if err := setValue.Set(s); err != nil {
+				return fmt.Errorf("could not parse %q as string value from %s for flag %s: %s", val, source, f.Name, err)
 			}
 		}
 
 		// Set this to false so that we reset the slice if we then set values from
 		// flags that have already been set by the environment.
-		destination.hasBeenSet = false
+		setValue.hasBeenSet = false
 		f.HasBeenSet = true
 	}
 
 	for _, name := range f.Names() {
-		if f.Value == nil {
-			f.Value = &StringSlice{}
-		}
+		set.Var(setValue, name, f.Usage)
+	}
 
-		if f.Destination != nil {
-			set.Var(f.Destination, name, f.Usage)
-			continue
-		}
+	return nil
+}
 
-		set.Var(f.Value, name, f.Usage)
+func (f *StringSliceFlag) WithSeparatorSpec(spec separatorSpec) {
+	f.separator = spec
+}
+
+// Get returns the flag’s value in the given Context.
+func (f *StringSliceFlag) Get(ctx *Context) []string {
+	return ctx.StringSlice(f.Name)
+}
+
+// RunAction executes flag action if set
+func (f *StringSliceFlag) RunAction(c *Context) error {
+	if f.Action != nil {
+		return f.Action(c, c.StringSlice(f.Name))
 	}
 
 	return nil
@@ -162,8 +198,8 @@ func (f *StringSliceFlag) Apply(set *flag.FlagSet) error {
 
 // StringSlice looks up the value of a local StringSliceFlag, returns
 // nil if not found
-func (c *Context) StringSlice(name string) []string {
-	if fs := lookupFlagSet(name, c); fs != nil {
+func (cCtx *Context) StringSlice(name string) []string {
+	if fs := cCtx.lookupFlagSet(name); fs != nil {
 		return lookupStringSlice(name, fs)
 	}
 	return nil
@@ -172,7 +208,7 @@ func (c *Context) StringSlice(name string) []string {
 func lookupStringSlice(name string, set *flag.FlagSet) []string {
 	f := set.Lookup(name)
 	if f != nil {
-		if slice, ok := f.Value.(*StringSlice); ok {
+		if slice, ok := unwrapFlagValue(f.Value).(*StringSlice); ok {
 			return slice.Value()
 		}
 	}