func (c *DebugHooksCommand) validateHooks() error {
if len(c.hooks) == 0 {
return nil
}
service := names.UnitService(c.Target)
relations, err := c.apiClient.ServiceCharmRelations(service)
if err != nil {
return err
}
validHooks := make(map[string]bool)
for _, hook := range hooks.UnitHooks() {
validHooks[string(hook)] = true
}
for _, relation := range relations {
for _, hook := range hooks.RelationHooks() {
hook := fmt.Sprintf("%s-%s", relation, hook)
validHooks[hook] = true
}
}
for _, hook := range c.hooks {
if !validHooks[hook] {
names := make([]string, 0, len(validHooks))
for hookName, _ := range validHooks {
names = append(names, hookName)
}
sort.Strings(names)
logger.Infof("unknown hook %s, valid hook names: %v", hook, names)
return fmt.Errorf("unit %q does not contain hook %q", c.Target, hook)
}
}
return nil
}
// Hooks returns a map of all possible valid hooks, taking relations
// into account. It's a map to enable fast lookups, and the value is
// always true.
func (m Meta) Hooks() map[string]bool {
allHooks := make(map[string]bool)
// Unit hooks
for _, hookName := range hooks.UnitHooks() {
allHooks[string(hookName)] = true
}
// Relation hooks
for hookName := range m.Provides {
generateRelationHooks(hookName, allHooks)
}
for hookName := range m.Requires {
generateRelationHooks(hookName, allHooks)
}
for hookName := range m.Peers {
generateRelationHooks(hookName, allHooks)
}
return allHooks
}