105 lines
3.9 KiB
Go
105 lines
3.9 KiB
Go
// Package builder defines interfaces for any Docker builder to implement.
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//
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// Historically, only server-side Dockerfile interpreters existed.
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// This package allows for other implementations of Docker builders.
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package builder
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import (
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"io"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/api/types/backend"
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"github.com/docker/docker/api/types/container"
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containerpkg "github.com/docker/docker/container"
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"github.com/docker/docker/layer"
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"golang.org/x/net/context"
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)
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const (
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// DefaultDockerfileName is the Default filename with Docker commands, read by docker build
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DefaultDockerfileName string = "Dockerfile"
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)
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// Source defines a location that can be used as a source for the ADD/COPY
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// instructions in the builder.
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type Source interface {
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// Root returns root path for accessing source
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Root() string
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// Close allows to signal that the filesystem tree won't be used anymore.
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// For Context implementations using a temporary directory, it is recommended to
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// delete the temporary directory in Close().
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Close() error
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// Hash returns a checksum for a file
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Hash(path string) (string, error)
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}
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// Backend abstracts calls to a Docker Daemon.
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type Backend interface {
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ImageBackend
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ExecBackend
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// Commit creates a new Docker image from an existing Docker container.
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Commit(string, *backend.ContainerCommitConfig) (string, error)
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// ContainerCreateWorkdir creates the workdir
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ContainerCreateWorkdir(containerID string) error
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CreateImage(config []byte, parent string, platform string) (Image, error)
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ImageCacheBuilder
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}
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// ImageBackend are the interface methods required from an image component
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type ImageBackend interface {
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GetImageAndReleasableLayer(ctx context.Context, refOrID string, opts backend.GetImageAndLayerOptions) (Image, ReleaseableLayer, error)
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}
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// ExecBackend contains the interface methods required for executing containers
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type ExecBackend interface {
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// ContainerAttachRaw attaches to container.
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ContainerAttachRaw(cID string, stdin io.ReadCloser, stdout, stderr io.Writer, stream bool, attached chan struct{}) error
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// ContainerCreate creates a new Docker container and returns potential warnings
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ContainerCreate(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error)
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// ContainerRm removes a container specified by `id`.
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ContainerRm(name string, config *types.ContainerRmConfig) error
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// ContainerKill stops the container execution abruptly.
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ContainerKill(containerID string, sig uint64) error
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// ContainerStart starts a new container
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ContainerStart(containerID string, hostConfig *container.HostConfig, checkpoint string, checkpointDir string) error
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// ContainerWait stops processing until the given container is stopped.
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ContainerWait(ctx context.Context, name string, condition containerpkg.WaitCondition) (<-chan containerpkg.StateStatus, error)
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}
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// Result is the output produced by a Builder
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type Result struct {
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ImageID string
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FromImage Image
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}
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// ImageCacheBuilder represents a generator for stateful image cache.
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type ImageCacheBuilder interface {
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// MakeImageCache creates a stateful image cache.
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MakeImageCache(cacheFrom []string, platform string) ImageCache
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}
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// ImageCache abstracts an image cache.
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// (parent image, child runconfig) -> child image
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type ImageCache interface {
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// GetCache returns a reference to a cached image whose parent equals `parent`
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// and runconfig equals `cfg`. A cache miss is expected to return an empty ID and a nil error.
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GetCache(parentID string, cfg *container.Config) (imageID string, err error)
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}
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// Image represents a Docker image used by the builder.
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type Image interface {
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ImageID() string
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RunConfig() *container.Config
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MarshalJSON() ([]byte, error)
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}
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// ReleaseableLayer is an image layer that can be mounted and released
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type ReleaseableLayer interface {
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Release() error
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Mount() (string, error)
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Commit(platform string) (ReleaseableLayer, error)
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DiffID() layer.DiffID
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}
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