mirror of
https://github.com/vbatts/go-mtree.git
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100 lines
2.1 KiB
Go
100 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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)
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// TakesValue returns true of the flag takes a value, otherwise false
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func (f *StringFlag) 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 *StringFlag) 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 *StringFlag) 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 *StringFlag) GetValue() string {
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return f.Value
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}
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// GetDefaultText returns the default text for this flag
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func (f *StringFlag) GetDefaultText() string {
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if f.DefaultText != "" {
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return f.DefaultText
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}
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val := f.Value
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if f.defaultValueSet {
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val = f.defaultValue
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}
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if val == "" {
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return val
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}
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return fmt.Sprintf("%q", val)
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}
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// GetEnvVars returns the env vars for this flag
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func (f *StringFlag) 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 *StringFlag) 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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f.defaultValueSet = true
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if val, _, found := flagFromEnvOrFile(f.EnvVars, f.FilePath); found {
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f.Value = val
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f.HasBeenSet = true
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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.StringVar(f.Destination, name, f.Value, f.Usage)
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continue
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}
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set.String(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 *StringFlag) Get(ctx *Context) string {
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return ctx.String(f.Name)
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}
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// RunAction executes flag action if set
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func (f *StringFlag) RunAction(c *Context) error {
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if f.Action != nil {
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return f.Action(c, c.String(f.Name))
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}
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return nil
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}
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// String looks up the value of a local StringFlag, returns
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// "" if not found
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func (cCtx *Context) String(name string) string {
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if fs := cCtx.lookupFlagSet(name); fs != nil {
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return lookupString(name, fs)
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}
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return ""
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}
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func lookupString(name string, set *flag.FlagSet) string {
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if f := set.Lookup(name); f != nil {
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return f.Value.String()
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}
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return ""
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}
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