moby/pkg/progress/progress.go
Tonis Tiigi 3d86b0c79b Implement content addressability for plugins
Move plugins to shared distribution stack with images.

Create immutable plugin config that matches schema2 requirements.

Ensure data being pushed is same as pulled/created.

Store distribution artifacts in a blobstore.

Run init layer setup for every plugin start.

Fix breakouts from unsafe file accesses.

Add support for `docker plugin install --alias`

Uses normalized references for default names to avoid collisions when using default hosts/tags.

Some refactoring of the plugin manager to support the change, like removing the singleton manager and adding manager config struct.

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
2016-12-23 13:29:58 -08:00

84 lines
2.2 KiB
Go

package progress
import (
"fmt"
)
// Progress represents the progress of a transfer.
type Progress struct {
ID string
// Progress contains a Message or...
Message string
// ...progress of an action
Action string
Current int64
Total int64
// Aux contains extra information not presented to the user, such as
// digests for push signing.
Aux interface{}
LastUpdate bool
}
// Output is an interface for writing progress information. It's
// like a writer for progress, but we don't call it Writer because
// that would be confusing next to ProgressReader (also, because it
// doesn't implement the io.Writer interface).
type Output interface {
WriteProgress(Progress) error
}
type chanOutput chan<- Progress
func (out chanOutput) WriteProgress(p Progress) error {
out <- p
return nil
}
// ChanOutput returns an Output that writes progress updates to the
// supplied channel.
func ChanOutput(progressChan chan<- Progress) Output {
return chanOutput(progressChan)
}
type discardOutput struct{}
func (discardOutput) WriteProgress(Progress) error {
return nil
}
// DiscardOutput returns an Output that discards progress
func DiscardOutput() Output {
return discardOutput{}
}
// Update is a convenience function to write a progress update to the channel.
func Update(out Output, id, action string) {
out.WriteProgress(Progress{ID: id, Action: action})
}
// Updatef is a convenience function to write a printf-formatted progress update
// to the channel.
func Updatef(out Output, id, format string, a ...interface{}) {
Update(out, id, fmt.Sprintf(format, a...))
}
// Message is a convenience function to write a progress message to the channel.
func Message(out Output, id, message string) {
out.WriteProgress(Progress{ID: id, Message: message})
}
// Messagef is a convenience function to write a printf-formatted progress
// message to the channel.
func Messagef(out Output, id, format string, a ...interface{}) {
Message(out, id, fmt.Sprintf(format, a...))
}
// Aux sends auxiliary information over a progress interface, which will not be
// formatted for the UI. This is used for things such as push signing.
func Aux(out Output, a interface{}) {
out.WriteProgress(Progress{Aux: a})
}