Merge changes from main

flag_uint_slice.go

@@ -0,0 +1,203 @@
+package cli
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// UintSlice wraps []int to satisfy flag.Value
+type UintSlice struct {
+	slice      []uint
+	hasBeenSet bool
+}
+
+// NewUintSlice makes an *UintSlice with default values
+func NewUintSlice(defaults ...uint) *UintSlice {
+	return &UintSlice{slice: append([]uint{}, defaults...)}
+}
+
+// clone allocate a copy of self object
+func (i *UintSlice) clone() *UintSlice {
+	n := &UintSlice{
+		slice:      make([]uint, len(i.slice)),
+		hasBeenSet: i.hasBeenSet,
+	}
+	copy(n.slice, i.slice)
+	return n
+}
+
+// TODO: Consistently have specific Set function for Int64 and Float64 ?
+// SetInt directly adds an integer to the list of values
+func (i *UintSlice) SetUint(value uint) {
+	if !i.hasBeenSet {
+		i.slice = []uint{}
+		i.hasBeenSet = true
+	}
+
+	i.slice = append(i.slice, value)
+}
+
+// Set parses the value into an integer and appends it to the list of values
+func (i *UintSlice) Set(value string) error {
+	if !i.hasBeenSet {
+		i.slice = []uint{}
+		i.hasBeenSet = true
+	}
+
+	if strings.HasPrefix(value, slPfx) {
+		// Deserializing assumes overwrite
+		_ = json.Unmarshal([]byte(strings.Replace(value, slPfx, "", 1)), &i.slice)
+		i.hasBeenSet = true
+		return nil
+	}
+
+	for _, s := range flagSplitMultiValues(value) {
+		tmp, err := strconv.ParseUint(strings.TrimSpace(s), 0, 32)
+		if err != nil {
+			return err
+		}
+
+		i.slice = append(i.slice, uint(tmp))
+	}
+
+	return nil
+}
+
+// String returns a readable representation of this value (for usage defaults)
+func (i *UintSlice) String() string {
+	v := i.slice
+	if v == nil {
+		// treat nil the same as zero length non-nil
+		v = make([]uint, 0)
+	}
+	str := fmt.Sprintf("%d", v)
+	str = strings.Replace(str, " ", ", ", -1)
+	str = strings.Replace(str, "[", "{", -1)
+	str = strings.Replace(str, "]", "}", -1)
+	return fmt.Sprintf("[]uint%s", str)
+}
+
+// Serialize allows UintSlice to fulfill Serializer
+func (i *UintSlice) Serialize() string {
+	jsonBytes, _ := json.Marshal(i.slice)
+	return fmt.Sprintf("%s%s", slPfx, string(jsonBytes))
+}
+
+// Value returns the slice of ints set by this flag
+func (i *UintSlice) Value() []uint {
+	return i.slice
+}
+
+// Get returns the slice of ints set by this flag
+func (i *UintSlice) Get() interface{} {
+	return *i
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *UintSliceFlag) String() string {
+	return withEnvHint(f.GetEnvVars(), stringifyUintSliceFlag(f))
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *UintSliceFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f *UintSliceFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetCategory returns the category for the flag
+func (f *UintSliceFlag) 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 *UintSliceFlag) GetValue() string {
+	if f.Value != nil {
+		return f.Value.String()
+	}
+	return ""
+}
+
+// GetDefaultText returns the default text for this flag
+func (f *UintSliceFlag) GetDefaultText() string {
+	if f.DefaultText != "" {
+		return f.DefaultText
+	}
+	return f.GetValue()
+}
+
+// GetEnvVars returns the env vars for this flag
+func (f *UintSliceFlag) GetEnvVars() []string {
+	return f.EnvVars
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *UintSliceFlag) Apply(set *flag.FlagSet) error {
+	// apply any default
+	if f.Destination != nil && f.Value != nil {
+		f.Destination.slice = make([]uint, len(f.Value.slice))
+		copy(f.Destination.slice, f.Value.slice)
+	}
+
+	// resolve setValue (what we will assign to the set)
+	var setValue *UintSlice
+	switch {
+	case f.Destination != nil:
+		setValue = f.Destination
+	case f.Value != nil:
+		setValue = f.Value.clone()
+	default:
+		setValue = new(UintSlice)
+	}
+
+	if val, source, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok && val != "" {
+		for _, s := range flagSplitMultiValues(val) {
+			if err := setValue.Set(strings.TrimSpace(s)); err != nil {
+				return fmt.Errorf("could not parse %q as uint slice 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.
+		setValue.hasBeenSet = false
+		f.HasBeenSet = true
+	}
+
+	for _, name := range f.Names() {
+		set.Var(setValue, name, f.Usage)
+	}
+
+	return nil
+}
+
+// Get returns the flag’s value in the given Context.
+func (f *UintSliceFlag) Get(ctx *Context) []uint {
+	return ctx.UintSlice(f.Name)
+}
+
+// UintSlice looks up the value of a local UintSliceFlag, returns
+// nil if not found
+func (cCtx *Context) UintSlice(name string) []uint {
+	if fs := cCtx.lookupFlagSet(name); fs != nil {
+		return lookupUintSlice(name, fs)
+	}
+	return nil
+}
+
+func lookupUintSlice(name string, set *flag.FlagSet) []uint {
+	f := set.Lookup(name)
+	if f != nil {
+		if slice, ok := unwrapFlagValue(f.Value).(*UintSlice); ok {
+			return slice.Value()
+		}
+	}
+	return nil
+}