155 lines
3.6 KiB
Go
155 lines
3.6 KiB
Go
package cli
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import (
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"flag"
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"strings"
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"strconv"
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)
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// Context is a type that is passed through to
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// each Handler action in a cli application. Context
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// can be used to retrieve context-specific Args and
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// parsed command-line options.
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type Context struct {
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App *App
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flagSet *flag.FlagSet
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globalSet *flag.FlagSet
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}
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// Creates a new context. For use in when invoking an App or Command action.
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func NewContext(app *App, set *flag.FlagSet, globalSet *flag.FlagSet) *Context {
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return &Context{app, set, globalSet}
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}
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// Looks up the value of a local int flag, returns 0 if no int flag exists
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func (c *Context) Int(name string) int {
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return lookupInt(name, c.flagSet)
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}
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// Looks up the value of a local bool flag, returns false if no bool flag exists
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func (c *Context) Bool(name string) bool {
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return lookupBool(name, c.flagSet)
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}
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// Looks up the value of a local string flag, returns "" if no string flag exists
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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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// Looks up the value of a local string slice flag, returns nil if no string slice flag exists
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func (c *Context) StringSlice(name string) []string {
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return lookupStringSlice(name, c.flagSet)
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}
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// Looks up the value of a local int slice flag, returns nil if no int slice flag exists
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func (c *Context) IntSlice(name string) []int {
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return lookupIntSlice(name, c.flagSet)
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}
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// Looks up the value of a global int flag, returns 0 if no int flag exists
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func (c *Context) GlobalInt(name string) int {
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return lookupInt(name, c.globalSet)
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}
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// Looks up the value of a global bool flag, returns false if no bool flag exists
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func (c *Context) GlobalBool(name string) bool {
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return lookupBool(name, c.globalSet)
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}
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// Looks up the value of a global string flag, returns "" if no string flag exists
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func (c *Context) GlobalString(name string) string {
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return lookupString(name, c.globalSet)
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}
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// Looks up the value of a global string slice flag, returns nil if no string slice flag exists
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func (c *Context) GlobalStringSlice(name string) []string {
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return lookupStringSlice(name, c.globalSet)
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}
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// Looks up the value of a global int slice flag, returns nil if no int slice flag exists
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func (c *Context) GlobalIntSlice(name string) []int {
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return lookupIntSlice(name, c.globalSet)
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}
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// Returns the command line arguments associated with the context.
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func (c *Context) Args() []string {
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return c.flagSet.Args()
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}
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func lookupInt(name string, set *flag.FlagSet) int {
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f := set.Lookup(name)
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if f != nil {
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val, err := strconv.Atoi(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 val
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}
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return 0
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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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return f.Value.String()
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}
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return ""
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}
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func lookupStringSlice(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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return (f.Value.(*StringSlice)).Value()
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}
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return nil
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}
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func lookupIntSlice(name string, set *flag.FlagSet) []int {
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f := set.Lookup(name)
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if f != nil {
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return (f.Value.(*IntSlice)).Value()
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}
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return nil
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}
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func lookupBool(name string, set *flag.FlagSet) bool {
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f := set.Lookup(name)
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if f != nil {
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val, err := strconv.ParseBool(f.Value.String())
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if err != nil {
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return false
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}
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return val
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}
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return false
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}
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func normalizeFlags(flags []Flag, set *flag.FlagSet) {
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for _, f := range flags {
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parts := strings.Split(f.GetName(), ", ")
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if len(parts) == 1 {
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continue
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}
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var ff *flag.Flag
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for _, name := range parts {
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ff = set.Lookup(name)
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if ff != nil && ff.Value.String() != "" {
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break
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}
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}
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if ff == nil {
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continue
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}
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for _, name := range parts {
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set.Set(name, ff.Value.String())
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}
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}
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}
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