/
image.go
76 lines (62 loc) · 1.57 KB
/
image.go
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/*
credit: https://github.com/containrrr/watchtower
*/
package docker
import (
"context"
"io"
"github.com/docker/docker/api/types"
"github.com/docker/docker/client"
)
func Image(ctx context.Context, imageName string) (*types.ImageInspect, error) {
cli, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
if err != nil {
return nil, err
}
defer cli.Close()
imageInfo, _, err := cli.ImageInspectWithRaw(ctx, imageName)
if err != nil {
return nil, err
}
return &imageInfo, nil
}
func PullImage(ctx context.Context, imageName string, handleOut func(io.ReadCloser)) error {
cli, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
if err != nil {
return err
}
defer cli.Close()
opts, err := GetPullOptions(imageName)
if err != nil {
return err
}
out, err := cli.ImagePull(ctx, imageName, opts)
if err != nil {
return err
}
defer out.Close()
if handleOut != nil {
handleOut(out)
} else {
if _, err := io.ReadAll(out); err != nil {
return err
}
}
return nil
}
func HasNewImage(ctx context.Context, imageName string, currentImageID string) (bool, string, error) {
cli, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
if err != nil {
return false, currentImageID, err
}
defer cli.Close()
newImageInfo, _, err := cli.ImageInspectWithRaw(ctx, imageName)
if err != nil {
return false, currentImageID, err
}
newImageID := newImageInfo.ID
if newImageID == currentImageID {
return false, currentImageID, nil
}
return true, newImageID, nil
}