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Adds ability to squash image after build

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Allow built images to be squash to scratch.
Squashing does not destroy any images or layers, and preserves the
build cache.

Introduce a new CLI argument --squash to docker build
Introduce a new param to the build API endpoint `squash`

Once the build is complete, docker creates a new image loading the diffs
from each layer into a single new layer and references all the parent's
layers.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
This commit is contained in:
Brian Goff 2016-04-21 12:08:37 -04:00
parent 2fc760496b
commit 362369b4bb
21 changed files with 330 additions and 23 deletions
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5
distribution/xfer/download_test.go
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@ -3,6 +3,7 @@ package xfer
import (
"bytes"
"errors"
"fmt"
"io"
"io/ioutil"
"runtime"
@ -31,6 +32,10 @@ func (ml *mockLayer) TarStream() (io.ReadCloser, error) {
return ioutil.NopCloser(bytes.NewBuffer(ml.layerData.Bytes())), nil
}
func (ml *mockLayer) TarStreamFrom(layer.ChainID) (io.ReadCloser, error) {
return nil, fmt.Errorf("not implemented")
}
func (ml *mockLayer) ChainID() layer.ChainID {
return ml.chainID
}