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, 13 insertions, 0 deletions

diff --git a/bool.go b/bool.go
index 70e2e0a..ead8dba 100644
--- a/bool.go
+++ b/bool.go
@@ -34,6 +34,19 @@ func (b *boolValue) String() string { return fmt.Sprintf("%v", *b) }
 
 func (b *boolValue) IsBoolFlag() bool { return true }
 
+func boolConv(sval string) (interface{}, error) {
+	return strconv.ParseBool(sval)
+}
+
+// GetBool return the bool value of a flag with the given name
+func (f *FlagSet) GetBool(name string) (bool, error) {
+	val, err := f.getFlagType(name, "bool", boolConv)
+	if err != nil {
+		return false, err
+	}
+	return val.(bool), nil
+}
+
 // BoolVar defines a bool flag with specified name, default value, and usage string.
 // The argument p points to a bool variable in which to store the value of the flag.
 func (f *FlagSet) BoolVar(p *bool, name string, value bool, usage string) {