Merge branch 'master' of github.com:xyproto/cli into xyproto-master

Conflicts:
	app.go
	context.go

context.go

@@ -17,6 +17,8 @@ type Context struct {
 	globalSet *flag.FlagSet
 }
 
+type Args []string
+
 // Creates a new context. For use in when invoking an App or Command action.
 func NewContext(app *App, set *flag.FlagSet, globalSet *flag.FlagSet) *Context {
 	return &Context{app, set, globalSet}
@@ -73,8 +75,9 @@ func (c *Context) GlobalIntSlice(name string) []int {
 }
 
 // Returns the command line arguments associated with the context.
-func (c *Context) Args() []string {
-	return c.flagSet.Args()
+func (c *Context) Args() Args {
+	args := Args(c.flagSet.Args())
+	return args
 }
 
 func lookupInt(name string, set *flag.FlagSet) int {
@@ -162,3 +165,30 @@ func normalizeFlags(flags []Flag, set *flag.FlagSet) error {
 	}
 	return nil
 }
+
+// Returns the nth argument, or else a blank string
+func (a Args) Get(n int) string {
+	if len(a) > n {
+		return a[n]
+	}
+	return ""
+}
+
+// Returns the first argument, or else a blank string
+func (a Args) First() string {
+	return a.Get(0)
+}
+
+// Return the rest of the arguments (not the first one)
+// or else an empty string slice
+func (a Args) Tail() []string {
+	if len(a) >= 2 {
+		return []string(a)[1:]
+	}
+	return []string{}
+}
+
+// Checks if there are any arguments present
+func (a Args) Present() bool {
+	return len(a) != 0
+}