99 lines
2.2 KiB
Go
99 lines
2.2 KiB
Go
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package cli
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import "flag"
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// StringFlag is a flag with type string
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type StringFlag struct {
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Name string
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Usage string
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EnvVar string
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FilePath string
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Required bool
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Hidden bool
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TakesFile bool
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Value string
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Destination *string
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}
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// String returns a readable representation of this value
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// (for usage defaults)
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func (f StringFlag) String() string {
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return FlagStringer(f)
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}
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// GetName returns the name of the flag
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func (f StringFlag) GetName() string {
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return f.Name
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}
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// IsRequired returns whether or not the flag is required
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func (f StringFlag) IsRequired() bool {
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return f.Required
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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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// 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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// Apply populates the flag given the flag set and environment
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// Ignores errors
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func (f StringFlag) Apply(set *flag.FlagSet) {
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_ = f.ApplyWithError(set)
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}
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// ApplyWithError populates the flag given the flag set and environment
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func (f StringFlag) ApplyWithError(set *flag.FlagSet) error {
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if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
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f.Value = envVal
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}
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eachName(f.Name, func(name string) {
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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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return
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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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// String looks up the value of a local StringFlag, returns
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// "" if not found
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func (c *Context) String(name string) string {
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return lookupString(name, c.flagSet)
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}
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// GlobalString looks up the value of a global StringFlag, returns
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// "" if not found
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func (c *Context) GlobalString(name string) string {
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if fs := lookupGlobalFlagSet(name, c); 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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f := set.Lookup(name)
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if f != nil {
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parsed, err := f.Value.String(), error(nil)
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if err != nil {
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return ""
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}
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return parsed
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}
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return ""
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}
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