Add new FlagSet.Get{Int,String,...} accessor functions

If I declared a bool flag named "hello" I can now call

b, err := f.GetBool("hello")

And b will hold the value of the flag

We can see this is already done in
https://github.com/codegangsta/cli/blob/bcec9b08c7e5564f7512ad7e7b03778fe1923116/context.go
If people use the codegangsta/cli

Other projects have done it themselves using pflags (what inspired this
patch)
https://github.com/GoogleCloudPlatform/kubernetes/blob/cd817aebd848facda29e0befbbd6e31bf22402e6/pkg/kubectl/cmd/util/helpers.go#L176

Lets just do it ourselves...

1 files changed, 17 insertions, 0 deletions

diff --git a/int32.go b/int32.go
index 18eaacd..515f90b 100644
--- a/int32.go
+++ b/int32.go
@@ -25,6 +25,23 @@ func (i *int32Value) Type() string {
 
 func (i *int32Value) String() string { return fmt.Sprintf("%v", *i) }
 
+func int32Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseInt(sval, 0, 32)
+	if err != nil {
+		return 0, err
+	}
+	return int32(v), nil
+}
+
+// GetInt32 return the int32 value of a flag with the given name
+func (f *FlagSet) GetInt32(name string) (int32, error) {
+	val, err := f.getFlagType(name, "int32", int32Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int32), nil
+}
+
 // Int32Var defines an int32 flag with specified name, default value, and usage string.
 // The argument p points to an int32 variable in which to store the value of the flag.
 func (f *FlagSet) Int32Var(p *int32, name string, value int32, usage string) {