di

type Container ¶

type Container struct{}

Container provides Dependency Injection (DI) for the step-runner.

DI is where an object's dependencies are passed to it, rather than being created internally. Promotes loose coupling, testability, and maintainability. Ideally, constructors are called only in two places: DI, and test builders. This makes it easy to change the constructor function signature.

For example, creating dependencies within an object:

- OCIFetcher depends on `internal.NewClient` and `cache.New` - Changing `internal.NewClient` or `cache.New` function signatures forces a change in OCIFetcher

func NewOCIFetcher() *OCIFetcher {
	return &OCIFetcher{
		client: internal.NewClient(cache.New()),
	}
}

Creating dependencies using DI:

- OCIFetcher only depends on internal.Client (even better, an interface of Client) - Changing NewClient or cache.New requires no change in OCIFetcher - Requires DI Container.OCIFetcher()

func NewOCIFetcher(client *internal.Client) *OCIFetcher {
	return &OCIFetcher{ client: client }
}

func NewContainer() *Container

func (c *Container) CacheDir() (string, error)

func (c *Container) DistFetcher() *dist.Fetcher

func (c *Container) GitFetcher() (*git.GitFetcher, error)

func (c *Container) StepParser() (*runner.Parser, error)

func (c *Container) StepResourceParser() (*runner.StepResourceParser, error)

func (c *Container) StepRunnerService() (*service.StepRunnerService, error)