From b4f8ac0cba9052cacb98a45d3450cd7c7ce34a2d Mon Sep 17 00:00:00 2001
From: Tonis Tiigi <tonistiigi@gmail.com>
Date: Mon, 10 Jul 2017 23:55:04 -0700
Subject: [PATCH] remove unused code

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
---
 control/control_standalone.go      | 77 ------------------------------
 control/control_standalone_test.go |  9 ++++
 examples/buildkit2/buildkit.go     |  8 ----
 3 files changed, 9 insertions(+), 85 deletions(-)

diff --git a/control/control_standalone.go b/control/control_standalone.go
index 7a974242..f47baae4 100644
--- a/control/control_standalone.go
+++ b/control/control_standalone.go
@@ -4,13 +4,9 @@ package control
 
 import (
 	"context"
-	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
-	"github.com/containerd/containerd/archive"
-	"github.com/containerd/containerd/archive/compression"
 	"github.com/containerd/containerd/content"
 	"github.com/containerd/containerd/differ"
 	"github.com/containerd/containerd/mount"
@@ -18,10 +14,7 @@ import (
 	ctdsnapshot "github.com/containerd/containerd/snapshot"
 	"github.com/containerd/containerd/snapshot/overlay"
 	"github.com/moby/buildkit/worker/runcworker"
-	digest "github.com/opencontainers/go-digest"
-	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/pkg/errors"
-	netcontext "golang.org/x/net/context" // TODO: fix
 )
 
 func NewStandalone(root string) (*Controller, error) {
@@ -75,76 +68,6 @@ func newStandalonePullDeps(root string) (*pullDeps, error) {
 	}, nil
 }
 
-// this should be exposed by containerd
-type localApplier struct {
-	root    string
-	content content.Store
-}
-
-func (a *localApplier) Apply(ctx netcontext.Context, desc ocispec.Descriptor, mounts []mount.Mount) (ocispec.Descriptor, error) {
-	dir, err := ioutil.TempDir(a.root, "extract-")
-	if err != nil {
-		return ocispec.Descriptor{}, errors.Wrap(err, "failed to create temporary directory")
-	}
-	defer os.RemoveAll(dir)
-	if err := mount.MountAll(mounts, dir); err != nil {
-		return ocispec.Descriptor{}, errors.Wrap(err, "failed to mount")
-	}
-	defer mount.Unmount(dir, 0)
-
-	r, err := a.content.Reader(ctx, desc.Digest)
-	if err != nil {
-		return ocispec.Descriptor{}, errors.Wrap(err, "failed to get reader from content store")
-	}
-	defer r.Close()
-
-	// TODO: only decompress stream if media type is compressed
-	ds, err := compression.DecompressStream(r)
-	if err != nil {
-		return ocispec.Descriptor{}, err
-	}
-	defer ds.Close()
-
-	digester := digest.Canonical.Digester()
-	rc := &readCounter{
-		r: io.TeeReader(ds, digester.Hash()),
-	}
-
-	if _, err := archive.Apply(ctx, dir, rc); err != nil {
-		return ocispec.Descriptor{}, err
-	}
-
-	// Read any trailing data
-	if _, err := io.Copy(ioutil.Discard, rc); err != nil {
-		return ocispec.Descriptor{}, err
-	}
-
-	return ocispec.Descriptor{
-		MediaType: ocispec.MediaTypeImageLayer,
-		Digest:    digester.Digest(),
-		Size:      rc.c,
-	}, nil
-}
-
-type readCounter struct {
-	r io.Reader
-	c int64
-}
-
-func (rc *readCounter) Read(p []byte) (n int, err error) {
-	n, err = rc.r.Read(p)
-	rc.c += int64(n)
-	return
-}
-
-type nopCloser struct {
-	io.Writer
-}
-
-func (n *nopCloser) Close() error {
-	return nil
-}
-
 // this should be supported by containerd. currently packages are unusable without wrapping
 const dummyNs = "buildkit"
 
diff --git a/control/control_standalone_test.go b/control/control_standalone_test.go
index 0c9919cc..7eaf4775 100644
--- a/control/control_standalone_test.go
+++ b/control/control_standalone_test.go
@@ -4,6 +4,7 @@ package control
 
 import (
 	"bytes"
+	"io"
 	"io/ioutil"
 	"os"
 	"path/filepath"
@@ -152,3 +153,11 @@ func TestControl(t *testing.T) {
 	assert.Equal(t, 1, len(du2)-len(du))
 
 }
+
+type nopCloser struct {
+	io.Writer
+}
+
+func (n *nopCloser) Close() error {
+	return nil
+}
diff --git a/examples/buildkit2/buildkit.go b/examples/buildkit2/buildkit.go
index b3efb643..17ba6fe5 100644
--- a/examples/buildkit2/buildkit.go
+++ b/examples/buildkit2/buildkit.go
@@ -85,14 +85,6 @@ func buildkit(opt buildOpt) *llb.State {
 	return r.With(copyAll(builddStandalone, "/bin"))
 }
 
-// goFromGit is a helper for cloning a git repo, checking out a tag and copying
-// source directory into
-func goFromGit(repo, tag string) llb.StateOption {
-	return func(s *llb.State) *llb.State {
-		return s.Run(llb.Shlexf("mkdir -p /go/src/%s", repo)).With(copyFrom(llb.Git(repo, tag), "/.", "/go/src/"+repo+"/")).Reset(s).Dirf("/go/src/%s", repo)
-	}
-}
-
 func copyAll(src *llb.State, destPath string) llb.StateOption {
 	return copyFrom(src, "/.", destPath)
 }