🔥 Simplify hook package

The hook package had unnecessary complexity when choosing which action
to apply.

Testing was also difficult as instantiating the hook package also
required providing the options.

Tests were removed as this is now a trivial function.

internal/hook/hook.go

@@ -10,7 +10,6 @@ import (
 )
 
 type Hook struct {
-	Action  Action
 	Creator Creator
 	Locater Locater
 	Deleter Deleter
@@ -64,9 +63,8 @@ const (
 	Marker = "Code generated by Committed. DO NOT EDIT."
 )
 
-func New(opts Options) Hook {
+func New() Hook {
 	return Hook{
-		Action:  action(opts),
 		Creator: os.OpenFile,
 		Deleter: os.Remove,
 		Opener:  os.Open,
@@ -76,26 +74,13 @@ func New(opts Options) Hook {
 	}
 }
 
-func (h *Hook) Do() error {
-	switch h.Action {
-	case ActionInstall:
-		return nil
-	case ActionUninstall:
-		return nil
-	}
-
-	return ErrAction
-}
-
-func action(opts Options) Action {
+func (h *Hook) Do(opts Options) error {
 	switch {
 	case opts.Install:
-		return ActionInstall
+		return h.Install()
 	case opts.Uninstall:
-		return ActionUninstall
-	case opts.Commit:
-		return ActionCommit
+		return h.Uninstall()
 	}
 
-	return ActionUnset
+	return ErrAction
 }