Method AddDependency

modules/modules.go:77–98

AddDependency adds a dependency from name(source) to dependsOn(targets) An error is returned if the source module name is not found

(name string, dependsOn ...string)

// AddDependency adds a dependency from name(source) to dependsOn(targets)
// An error is returned if the source module name is not found
func (m *Manager) AddDependency(name string, dependsOn ...string) error {
	mod, ok := m.modules[name]
	if !ok {
		return fmt.Errorf("no such module: %s", name)
	}

	// Ensure it doesn't introduce any circular dependency.
	for _, newDep := range dependsOn {
		if _, ok := m.modules[newDep]; !ok {
			return fmt.Errorf("no such module: %s", newDep)
		}

		for _, prevDep := range m.DependenciesForModule(newDep) {
			if prevDep == name {
				return fmt.Errorf("found a circular dependency: %s depends on %s", newDep, name)
			}
		}
	}

	mod.deps = append(mod.deps, dependsOn...)
	return nil
}

// InitModuleServices initialises given modules by initialising all their dependencies
// in the right order. Modules are wrapped in such a way that they start after their