2013-07-18 00:00:02 +00:00
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package cli
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import (
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2013-11-20 08:05:18 +00:00
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"errors"
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2013-11-21 01:25:13 +00:00
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"flag"
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2013-07-18 00:00:02 +00:00
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"strconv"
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2013-11-18 23:37:59 +00:00
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"strings"
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2014-08-02 21:32:32 +00:00
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"time"
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2013-07-18 00:00:02 +00:00
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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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2014-11-11 20:48:07 +00:00
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App *App
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Command Command
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flagSet *flag.FlagSet
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setFlags map[string]bool
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globalSetFlags map[string]bool
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2015-05-18 15:39:48 +00:00
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parentContext *Context
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2013-07-18 00:00:02 +00:00
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}
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2016-05-09 14:12:59 +00:00
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// NewContext creates a new context. For use in when invoking an App or Command action.
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2015-05-18 15:39:48 +00:00
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func NewContext(app *App, set *flag.FlagSet, parentCtx *Context) *Context {
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return &Context{App: app, flagSet: set, parentContext: parentCtx}
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2013-07-18 00:00:02 +00:00
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}
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2016-05-09 14:12:59 +00:00
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// NumFlags returns the number of flags set
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2015-02-26 21:51:01 +00:00
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func (c *Context) NumFlags() int {
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return c.flagSet.NFlag()
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}
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2015-06-08 20:21:26 +00:00
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// Set sets a context flag to a value.
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func (c *Context) Set(name, value string) error {
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return c.flagSet.Set(name, value)
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}
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2016-04-30 15:46:47 +00:00
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// GlobalSet sets a context flag to a value on the global flagset
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func (c *Context) GlobalSet(name, value string) error {
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return globalContext(c).flagSet.Set(name, value)
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}
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2016-05-09 14:12:59 +00:00
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// IsSet determines if the flag was actually set
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2013-12-18 18:09:16 +00:00
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func (c *Context) IsSet(name string) bool {
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if c.setFlags == nil {
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c.setFlags = make(map[string]bool)
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c.flagSet.Visit(func(f *flag.Flag) {
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c.setFlags[f.Name] = true
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})
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}
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return c.setFlags[name] == true
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}
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2016-05-09 14:12:59 +00:00
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// GlobalIsSet determines if the global flag was actually set
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2014-11-11 20:48:07 +00:00
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func (c *Context) GlobalIsSet(name string) bool {
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if c.globalSetFlags == nil {
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c.globalSetFlags = make(map[string]bool)
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2015-06-29 21:20:27 +00:00
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ctx := c
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if ctx.parentContext != nil {
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ctx = ctx.parentContext
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}
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for ; ctx != nil && c.globalSetFlags[name] == false; ctx = ctx.parentContext {
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2015-05-18 15:39:48 +00:00
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ctx.flagSet.Visit(func(f *flag.Flag) {
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c.globalSetFlags[f.Name] = true
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})
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}
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2014-11-11 20:48:07 +00:00
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}
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2015-05-18 15:39:48 +00:00
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return c.globalSetFlags[name]
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2014-11-11 20:48:07 +00:00
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}
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2016-05-09 14:12:59 +00:00
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// FlagNames returns a slice of flag names used in this context.
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2014-06-14 03:09:28 +00:00
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func (c *Context) FlagNames() (names []string) {
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for _, flag := range c.Command.Flags {
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2015-12-15 17:29:03 +00:00
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name := strings.Split(flag.GetName(), ",")[0]
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2014-06-14 03:09:28 +00:00
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if name == "help" {
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continue
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}
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names = append(names, name)
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}
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return
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}
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2016-05-09 14:12:59 +00:00
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// GlobalFlagNames returns a slice of global flag names used by the app.
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2014-10-02 22:16:29 +00:00
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func (c *Context) GlobalFlagNames() (names []string) {
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for _, flag := range c.App.Flags {
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2015-12-15 17:29:03 +00:00
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name := strings.Split(flag.GetName(), ",")[0]
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2014-10-02 22:16:29 +00:00
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if name == "help" || name == "version" {
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continue
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}
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names = append(names, name)
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}
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return
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}
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2016-05-09 14:12:59 +00:00
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// Parent returns the parent context, if any
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2015-06-19 21:06:04 +00:00
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func (c *Context) Parent() *Context {
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return c.parentContext
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}
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2016-05-09 14:12:59 +00:00
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// Args contains apps console arguments
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2013-11-28 15:53:50 +00:00
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type Args []string
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2016-05-09 14:12:59 +00:00
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// Args returns the command line arguments associated with the context.
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2013-11-24 13:40:21 +00:00
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func (c *Context) Args() Args {
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args := Args(c.flagSet.Args())
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return args
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2013-07-19 01:00:52 +00:00
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}
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2016-05-09 14:12:59 +00:00
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// NArg returns the number of the command line arguments.
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2016-02-21 13:57:11 +00:00
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func (c *Context) NArg() int {
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return len(c.Args())
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}
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2016-05-09 14:12:59 +00:00
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// Get returns the nth argument, or else a blank string
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2013-11-28 15:53:50 +00:00
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func (a Args) Get(n int) string {
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if len(a) > n {
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return a[n]
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}
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return ""
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}
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2016-05-09 14:12:59 +00:00
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// First returns the first argument, or else a blank string
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2013-11-28 15:53:50 +00:00
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func (a Args) First() string {
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return a.Get(0)
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}
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2016-05-09 14:12:59 +00:00
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// Tail returns the rest of the arguments (not the first one)
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2013-11-28 15:53:50 +00:00
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// or else an empty string slice
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func (a Args) Tail() []string {
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if len(a) >= 2 {
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return []string(a)[1:]
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}
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return []string{}
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}
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2016-05-09 14:12:59 +00:00
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// Present checks if there are any arguments present
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2013-11-28 15:53:50 +00:00
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func (a Args) Present() bool {
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return len(a) != 0
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}
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2016-05-09 14:12:59 +00:00
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// Swap swaps arguments at the given indexes
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2014-07-13 14:18:45 +00:00
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func (a Args) Swap(from, to int) error {
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if from >= len(a) || to >= len(a) {
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return errors.New("index out of range")
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}
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a[from], a[to] = a[to], a[from]
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return nil
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}
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2016-04-30 15:46:47 +00:00
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func globalContext(ctx *Context) *Context {
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if ctx == nil {
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return nil
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}
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for {
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if ctx.parentContext == nil {
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return ctx
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}
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ctx = ctx.parentContext
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}
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}
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2015-06-29 21:20:27 +00:00
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func lookupGlobalFlagSet(name string, ctx *Context) *flag.FlagSet {
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if ctx.parentContext != nil {
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ctx = ctx.parentContext
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}
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for ; ctx != nil; ctx = ctx.parentContext {
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2015-05-18 15:39:48 +00:00
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if f := ctx.flagSet.Lookup(name); f != nil {
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return ctx.flagSet
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}
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}
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return nil
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}
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2013-11-18 23:35:23 +00:00
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func lookupInt(name string, set *flag.FlagSet) int {
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2013-07-19 01:00:52 +00:00
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f := set.Lookup(name)
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if f != nil {
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2016-06-16 15:13:32 +00:00
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val, err := strconv.ParseInt(f.Value.String(), 0, 64)
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2013-07-18 00:00:02 +00:00
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if err != nil {
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2013-07-19 01:00:52 +00:00
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return 0
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2013-07-18 00:00:02 +00:00
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}
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2016-06-16 15:13:32 +00:00
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return int(val)
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2013-07-18 00:00:02 +00:00
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}
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2013-07-24 14:35:45 +00:00
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2013-07-22 13:35:56 +00:00
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return 0
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2013-07-18 00:00:02 +00:00
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}
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2016-06-11 22:41:24 +00:00
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func lookupInt64(name string, set *flag.FlagSet) int64 {
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f := set.Lookup(name)
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if f != nil {
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2016-06-16 15:13:32 +00:00
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val, err := strconv.ParseInt(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 val
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}
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return 0
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}
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func lookupUint(name string, set *flag.FlagSet) uint {
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f := set.Lookup(name)
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if f != nil {
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val, 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 uint(val)
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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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val, err := strconv.ParseUint(f.Value.String(), 0, 64)
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2016-06-11 22:41:24 +00:00
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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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2014-08-02 21:32:32 +00:00
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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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val, err := time.ParseDuration(f.Value.String())
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if err == nil {
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return val
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}
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}
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return 0
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}
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2013-12-03 13:42:09 +00:00
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func lookupFloat64(name string, set *flag.FlagSet) float64 {
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f := set.Lookup(name)
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if f != nil {
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val, err := strconv.ParseFloat(f.Value.String(), 64)
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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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2013-11-18 23:35:23 +00:00
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func lookupString(name string, set *flag.FlagSet) string {
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2013-07-19 01:00:52 +00:00
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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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2013-07-18 00:00:02 +00:00
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}
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2013-07-24 14:35:45 +00:00
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2013-07-22 13:35:56 +00:00
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return ""
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2013-07-18 00:00:02 +00:00
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}
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2013-11-18 23:35:23 +00:00
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func lookupStringSlice(name string, set *flag.FlagSet) []string {
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2013-09-24 01:41:31 +00:00
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f := set.Lookup(name)
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if f != nil {
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2013-09-24 19:36:01 +00:00
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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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2013-11-18 23:35:23 +00:00
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func lookupIntSlice(name string, set *flag.FlagSet) []int {
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2013-09-24 19:36:01 +00:00
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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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2013-09-24 01:41:31 +00:00
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}
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return nil
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}
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2016-06-12 04:54:33 +00:00
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func lookupInt64Slice(name string, set *flag.FlagSet) []int64 {
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f := set.Lookup(name)
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if f != nil {
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return (f.Value.(*Int64Slice)).Value()
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}
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return nil
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}
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2014-04-15 14:16:47 +00:00
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func lookupGeneric(name string, set *flag.FlagSet) interface{} {
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f := set.Lookup(name)
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if f != nil {
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2014-04-15 14:57:11 +00:00
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return f.Value
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2014-04-15 14:16:47 +00:00
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}
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return nil
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}
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2013-11-18 23:35:23 +00:00
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func lookupBool(name string, set *flag.FlagSet) bool {
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2013-07-19 01:00:52 +00:00
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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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2013-07-24 14:35:45 +00:00
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2013-07-22 13:35:56 +00:00
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return false
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2013-07-18 00:00:02 +00:00
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}
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2013-11-18 23:35:23 +00:00
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2014-03-06 01:24:22 +00:00
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func lookupBoolT(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 true
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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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2014-03-19 02:26:57 +00:00
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func copyFlag(name string, ff *flag.Flag, set *flag.FlagSet) {
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switch ff.Value.(type) {
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case *StringSlice:
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default:
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set.Set(name, ff.Value.String())
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}
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}
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2013-11-20 08:05:18 +00:00
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func normalizeFlags(flags []Flag, set *flag.FlagSet) error {
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visited := make(map[string]bool)
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set.Visit(func(f *flag.Flag) {
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visited[f.Name] = true
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})
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2013-11-18 23:35:23 +00:00
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for _, f := range flags {
|
2015-12-15 17:29:03 +00:00
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parts := strings.Split(f.GetName(), ",")
|
2013-11-18 23:35:23 +00:00
|
|
|
if len(parts) == 1 {
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
var ff *flag.Flag
|
|
|
|
for _, name := range parts {
|
2013-11-20 08:05:18 +00:00
|
|
|
name = strings.Trim(name, " ")
|
|
|
|
if visited[name] {
|
|
|
|
if ff != nil {
|
|
|
|
return errors.New("Cannot use two forms of the same flag: " + name + " " + ff.Name)
|
|
|
|
}
|
|
|
|
ff = set.Lookup(name)
|
2013-11-18 23:35:23 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
if ff == nil {
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
for _, name := range parts {
|
2013-11-20 08:05:18 +00:00
|
|
|
name = strings.Trim(name, " ")
|
2014-03-19 02:26:57 +00:00
|
|
|
if !visited[name] {
|
|
|
|
copyFlag(name, ff, set)
|
|
|
|
}
|
2013-11-18 23:35:23 +00:00
|
|
|
}
|
|
|
|
}
|
2013-11-20 08:05:18 +00:00
|
|
|
return nil
|
2013-11-18 23:35:23 +00:00
|
|
|
}
|