mirror of
https://github.com/vbatts/go-mtree.git
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92 lines
2.1 KiB
Go
92 lines
2.1 KiB
Go
package cli
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import (
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"flag"
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"fmt"
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"time"
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)
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// TakesValue returns true of the flag takes a value, otherwise false
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func (f *DurationFlag) TakesValue() bool {
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return true
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}
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// GetUsage returns the usage string for the flag
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func (f *DurationFlag) GetUsage() string {
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return f.Usage
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}
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// GetCategory returns the category for the flag
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func (f *DurationFlag) GetCategory() string {
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return f.Category
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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 *DurationFlag) GetValue() string {
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return f.Value.String()
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}
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// GetDefaultText returns the default text for this flag
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func (f *DurationFlag) 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 f.GetValue()
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}
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// GetEnvVars returns the env vars for this flag
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func (f *DurationFlag) GetEnvVars() []string {
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return f.EnvVars
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}
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// Apply populates the flag given the flag set and environment
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func (f *DurationFlag) Apply(set *flag.FlagSet) error {
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if val, source, found := flagFromEnvOrFile(f.EnvVars, f.FilePath); found {
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if val != "" {
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valDuration, err := time.ParseDuration(val)
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if err != nil {
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return fmt.Errorf("could not parse %q as duration value from %s for flag %s: %s", val, source, f.Name, err)
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}
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f.Value = valDuration
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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.DurationVar(f.Destination, name, f.Value, f.Usage)
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continue
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}
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set.Duration(name, f.Value, f.Usage)
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}
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return nil
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}
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// Get returns the flag’s value in the given Context.
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func (f *DurationFlag) Get(ctx *Context) time.Duration {
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return ctx.Duration(f.Name)
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}
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// Duration looks up the value of a local DurationFlag, returns
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// 0 if not found
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func (cCtx *Context) Duration(name string) time.Duration {
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if fs := cCtx.lookupFlagSet(name); fs != nil {
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return lookupDuration(name, fs)
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}
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return 0
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}
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func lookupDuration(name string, set *flag.FlagSet) time.Duration {
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f := set.Lookup(name)
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if f != nil {
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parsed, err := time.ParseDuration(f.Value.String())
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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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