Documentation
¶
Overview ¶
Package crane holds libraries used to implement the crane CLI.
Example ¶
package main
import (
"fmt"
"github.com/google/go-containerregistry/pkg/crane"
)
func main() {
c := map[string][]byte{
"/binary": []byte("binary contents"),
}
i, _ := crane.Image(c)
d, _ := i.Digest()
fmt.Println(d)
}
Output: sha256:09fb0c6289cefaad8c74c7e5fd6758ad6906ab8f57f1350d9f4eb5a7df45ff8b
Index ¶
- func Append(base v1.Image, paths ...string) (v1.Image, error)
- func Catalog(src string, opt ...Option) (res []string, err error)
- func Config(ref string, opt ...Option) ([]byte, error)
- func Copy(src, dst string, opt ...Option) error
- func Delete(src string, opt ...Option) error
- func Digest(ref string, opt ...Option) (string, error)
- func Export(img v1.Image, w io.Writer) error
- func Head(r string, opt ...Option) (*v1.Descriptor, error)
- func Image(filemap map[string][]byte) (v1.Image, error)
- func Insecure(o *Options)
- func Layer(filemap map[string][]byte) (v1.Layer, error)
- func ListTags(src string, opt ...Option) ([]string, error)
- func Load(path string, opt ...Option) (v1.Image, error)
- func LoadTag(path, tag string, opt ...Option) (v1.Image, error)
- func Manifest(ref string, opt ...Option) ([]byte, error)
- func MultiSave(imgMap map[string]v1.Image, path string, opt ...Option) error
- func MultiSaveLegacy(imgMap map[string]v1.Image, path string) error
- func MultiSaveOCI(imgMap map[string]v1.Image, path string) error
- func Optimize(src, dst string, prioritize []string, opt ...Option) error
- func Pull(src string, opt ...Option) (v1.Image, error)
- func PullLayer(ref string, opt ...Option) (v1.Layer, error)
- func Push(img v1.Image, dst string, opt ...Option) error
- func Save(img v1.Image, src, path string) error
- func SaveLegacy(img v1.Image, src, path string) error
- func SaveOCI(img v1.Image, path string) error
- func Tag(img, tag string, opt ...Option) error
- func Upload(layer v1.Layer, repo string, opt ...Option) error
- type Option
- type Options
Examples ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func Append ¶
Append reads a layer from path and appends it the the v1.Image base.
If the base image is a Windows base image (i.e., its config.OS is "windows"), the contents of the tarballs will be modified to be suitable for a Windows container image.`,
func Export ¶
Export writes the filesystem contents (as a tarball) of img to w. If img has a single layer, just write the (uncompressed) contents to w so that this "just works" for images that just wrap a single blob.
func Head ¶ added in v0.6.0
func Head(r string, opt ...Option) (*v1.Descriptor, error)
Head performs a HEAD request for a manifest and returns a content descriptor based on the registry's response.
func Image ¶
Image creates a image with the given filemaps as its contents. These images are reproducible and consistent. A filemap is a path -> file content map representing a file system.
func Insecure ¶
func Insecure(o *Options)
Insecure is an Option that allows image references to be fetched without TLS.
func Layer ¶
Layer creates a layer from a single file map. These layers are reproducible and consistent. A filemap is a path -> file content map representing a file system.
func LoadTag ¶ added in v0.5.0
LoadTag reads a tag from the tarball at path as a v1.Image. If tag is "", will attempt to read the tarball as a single image.
func MultiSaveLegacy ¶ added in v0.5.0
MultiSaveLegacy writes collection of v1.Image img with tag as a legacy tarball.
func MultiSaveOCI ¶ added in v0.5.0
MultiSaveOCI writes collection of v1.Image img as an OCI Image Layout at path. If a layout already exists at that path, it will add the image to the index.
func Optimize ¶ added in v0.3.0
Optimize optimizes a remote image or index from src to dst. THIS API IS EXPERIMENTAL AND SUBJECT TO CHANGE WITHOUT WARNING.
func SaveLegacy ¶
SaveLegacy writes the v1.Image img as a legacy tarball at path with tag src.
Types ¶
type Option ¶
type Option func(*Options)
Option is a functional option for crane.
func WithAuth ¶ added in v0.2.0
func WithAuth(auth authn.Authenticator) Option
WithAuth is a functional option for overriding the default authenticator for remote operations.
By default, crane will use authn.DefaultKeychain.
func WithAuthFromKeychain ¶ added in v0.2.0
WithAuthFromKeychain is a functional option for overriding the default authenticator for remote operations, using an authn.Keychain to find credentials.
By default, crane will use authn.DefaultKeychain.
func WithContext ¶ added in v0.6.0
WithContext is a functional option for setting the context.
func WithPlatform ¶ added in v0.1.4
WithPlatform is an Option to specify the platform.
func WithTransport ¶
func WithTransport(t http.RoundTripper) Option
WithTransport is a functional option for overriding the default transport for remote operations.
func WithUserAgent ¶ added in v0.2.0
WithUserAgent adds the given string to the User-Agent header for any HTTP requests.
type Options ¶ added in v0.7.0
Options hold the options that crane uses when calling other packages.
func GetOptions ¶ added in v0.7.0
GetOptions exposes the underlying []remote.Option, []name.Option, and platform, based on the passed Option. Generally, you shouldn't need to use this unless you've painted yourself into a dependency corner as we have with the crane and gcrane cli packages.
Source Files