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package cli
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import (
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"flag"
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"fmt"
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"strconv"
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)
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// Apply populates the flag given the flag set and environment
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func (f *Uint64Flag) Apply(set *flag.FlagSet) error {
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// set default value so that environment wont be able to overwrite it
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f.defaultValue = f.Value
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if val, source, found := flagFromEnvOrFile(f.EnvVars, f.FilePath); found {
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if val != "" {
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valInt, err := strconv.ParseUint(val, f.Base, 64)
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if err != nil {
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return fmt.Errorf("could not parse %q as uint64 value from %s for flag %s: %s", val, source, f.Name, err)
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}
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f.Value = valInt
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f.HasBeenSet = true
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}
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}
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for _, name := range f.Names() {
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if f.Destination != nil {
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set.Uint64Var(f.Destination, name, f.Value, f.Usage)
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continue
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}
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set.Uint64(name, f.Value, f.Usage)
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}
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return nil
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}
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// GetValue returns the flags value as string representation and an empty
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// string if the flag takes no value at all.
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func (f *Uint64Flag) GetValue() string {
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return fmt.Sprintf("%d", f.Value)
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}
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// GetDefaultText returns the default text for this flag
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func (f *Uint64Flag) GetDefaultText() string {
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if f.DefaultText != "" {
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return f.DefaultText
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}
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return fmt.Sprintf("%d", f.defaultValue)
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}
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// Get returns the flag’s value in the given Context.
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func (f *Uint64Flag) Get(ctx *Context) uint64 {
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return ctx.Uint64(f.Name)
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}
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// RunAction executes flag action if set
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func (f *Uint64Flag) RunAction(c *Context) error {
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if f.Action != nil {
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return f.Action(c, c.Uint64(f.Name))
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}
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return nil
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}
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// Uint64 looks up the value of a local Uint64Flag, returns
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// 0 if not found
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func (cCtx *Context) Uint64(name string) uint64 {
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if fs := cCtx.lookupFlagSet(name); fs != nil {
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return lookupUint64(name, fs)
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}
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return 0
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}
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func lookupUint64(name string, set *flag.FlagSet) uint64 {
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f := set.Lookup(name)
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if f != nil {
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parsed, err := strconv.ParseUint(f.Value.String(), 0, 64)
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if err != nil {
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return 0
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}
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return parsed
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}
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return 0
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}
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