point to new ko repo

vendor/github.com/google/ko/LICENSE

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/google/ko/cmd/ko/test/kodata/kenobi

@@ -0,0 +1 @@
+../kenobi

vendor/github.com/google/ko/pkg/build/build.go

@@ -0,0 +1,31 @@
+// Copyright 2018 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package build
+
+import (
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+)
+
+// Interface abstracts different methods for turning a supported importpath
+// reference into a v1.Image.
+type Interface interface {
+	// IsSupportedReference determines whether the given reference is to an importpath reference
+	// that Ko supports building.
+	// TODO(mattmoor): Verify that some base repo: foo.io/bar can be suffixed with this reference and parsed.
+	IsSupportedReference(string) bool
+
+	// Build turns the given importpath reference into a v1.Image containing the Go binary.
+	Build(string) (v1.Image, error)
+}

vendor/github.com/google/ko/pkg/build/doc.go

@@ -0,0 +1,17 @@
+// Copyright 2018 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package build defines methods for building a v1.Image reference from a
+// Go binary reference.
+package build

vendor/github.com/google/ko/pkg/build/future.go

@@ -0,0 +1,75 @@
+// Copyright 2018 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package build
+
+import (
+	"sync"
+
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+)
+
+func newFuture(work func() (v1.Image, error)) *future {
+	// Create a channel on which to send the result.
+	ch := make(chan *result)
+	// Initiate the actual work, sending its result
+	// along the above channel.
+	go func() {
+		img, err := work()
+		ch <- &result{img: img, err: err}
+	}()
+	// Return a future for the above work.  Callers should
+	// call .Get() on this result (as many times as needed).
+	// One of these calls will receive the result, store it,
+	// and close the channel so that the rest of the callers
+	// can consume it.
+	return &future{
+		promise: ch,
+	}
+}
+
+type result struct {
+	img v1.Image
+	err error
+}
+
+type future struct {
+	m sync.RWMutex
+
+	result  *result
+	promise chan *result
+}
+
+// Get blocks on the result of the future.
+func (f *future) Get() (v1.Image, error) {
+	// Block on the promise of a result until we get one.
+	result, ok := <-f.promise
+	if ok {
+		func() {
+			f.m.Lock()
+			defer f.m.Unlock()
+			// If we got the result, then store it so that
+			// others may access it.
+			f.result = result
+			// Close the promise channel so that others
+			// are signaled that the result is available.
+			close(f.promise)
+		}()
+	}
+
+	f.m.RLock()
+	defer f.m.RUnlock()
+
+	return f.result.img, f.result.err
+}

vendor/github.com/google/ko/pkg/build/gobuild.go

@@ -0,0 +1,346 @@
+// Copyright 2018 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package build
+
+import (
+	"archive/tar"
+	"bytes"
+	"errors"
+	gb "go/build"
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+	"os/exec"
+	"path/filepath"
+
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+	"github.com/google/go-containerregistry/pkg/v1/mutate"
+	"github.com/google/go-containerregistry/pkg/v1/tarball"
+)
+
+const (
+	appDir             = "/ko-app"
+	defaultAppFilename = "ko-app"
+)
+
+// GetBase takes an importpath and returns a base v1.Image.
+type GetBase func(string) (v1.Image, error)
+type builder func(string) (string, error)
+
+type gobuild struct {
+	getBase      GetBase
+	creationTime v1.Time
+	build        builder
+}
+
+// Option is a functional option for NewGo.
+type Option func(*gobuildOpener) error
+
+type gobuildOpener struct {
+	getBase      GetBase
+	creationTime v1.Time
+	build        builder
+}
+
+func (gbo *gobuildOpener) Open() (Interface, error) {
+	if gbo.getBase == nil {
+		return nil, errors.New("a way of providing base images must be specified, see build.WithBaseImages")
+	}
+	return &gobuild{
+		getBase:      gbo.getBase,
+		creationTime: gbo.creationTime,
+		build:        gbo.build,
+	}, nil
+}
+
+// NewGo returns a build.Interface implementation that:
+//  1. builds go binaries named by importpath,
+//  2. containerizes the binary on a suitable base,
+func NewGo(options ...Option) (Interface, error) {
+	gbo := &gobuildOpener{
+		build: build,
+	}
+
+	for _, option := range options {
+		if err := option(gbo); err != nil {
+			return nil, err
+		}
+	}
+	return gbo.Open()
+}
+
+// IsSupportedReference implements build.Interface
+//
+// Only valid importpaths that provide commands (i.e., are "package main") are
+// supported.
+func (*gobuild) IsSupportedReference(s string) bool {
+	p, err := gb.Import(s, gb.Default.GOPATH, gb.ImportComment)
+	if err != nil {
+		return false
+	}
+	return p.IsCommand()
+}
+
+func build(ip string) (string, error) {
+	tmpDir, err := ioutil.TempDir("", "ko")
+	if err != nil {
+		return "", err
+	}
+	file := filepath.Join(tmpDir, "out")
+
+	cmd := exec.Command("go", "build", "-o", file, ip)
+
+	// Last one wins
+	// TODO(mattmoor): GOARCH=amd64
+	cmd.Env = append(os.Environ(), "CGO_ENABLED=0", "GOOS=linux")
+
+	var output bytes.Buffer
+	cmd.Stderr = &output
+	cmd.Stdout = &output
+
+	log.Printf("Building %s", ip)
+	if err := cmd.Run(); err != nil {
+		os.RemoveAll(tmpDir)
+		log.Printf("Unexpected error running \"go build\": %v\n%v", err, output.String())
+		return "", err
+	}
+	return file, nil
+}
+
+func appFilename(importpath string) string {
+	base := filepath.Base(importpath)
+
+	// If we fail to determine a good name from the importpath then use a
+	// safe default.
+	if base == "." || base == string(filepath.Separator) {
+		return defaultAppFilename
+	}
+
+	return base
+}
+
+func tarAddDirectories(tw *tar.Writer, dir string) error {
+	if dir == "." || dir == string(filepath.Separator) {
+		return nil
+	}
+
+	// Write parent directories first
+	if err := tarAddDirectories(tw, filepath.Dir(dir)); err != nil {
+		return err
+	}
+
+	// write the directory header to the tarball archive
+	if err := tw.WriteHeader(&tar.Header{
+		Name:     dir,
+		Typeflag: tar.TypeDir,
+		// Use a fixed Mode, so that this isn't sensitive to the directory and umask
+		// under which it was created. Additionally, windows can only set 0222,
+		// 0444, or 0666, none of which are executable.
+		Mode: 0555,
+	}); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func tarBinary(name, binary string) (*bytes.Buffer, error) {
+	buf := bytes.NewBuffer(nil)
+	tw := tar.NewWriter(buf)
+	defer tw.Close()
+
+	// write the parent directories to the tarball archive
+	if err := tarAddDirectories(tw, filepath.Dir(name)); err != nil {
+		return nil, err
+	}
+
+	file, err := os.Open(binary)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	stat, err := file.Stat()
+	if err != nil {
+		return nil, err
+	}
+	header := &tar.Header{
+		Name:     name,
+		Size:     stat.Size(),
+		Typeflag: tar.TypeReg,
+		// Use a fixed Mode, so that this isn't sensitive to the directory and umask
+		// under which it was created. Additionally, windows can only set 0222,
+		// 0444, or 0666, none of which are executable.
+		Mode: 0555,
+	}
+	// write the header to the tarball archive
+	if err := tw.WriteHeader(header); err != nil {
+		return nil, err
+	}
+	// copy the file data to the tarball
+	if _, err := io.Copy(tw, file); err != nil {
+		return nil, err
+	}
+
+	return buf, nil
+}
+
+func kodataPath(s string) (string, error) {
+	p, err := gb.Import(s, gb.Default.GOPATH, gb.ImportComment)
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(p.Dir, "kodata"), nil
+}
+
+// Where kodata lives in the image.
+const kodataRoot = "/var/run/ko"
+
+func tarKoData(importpath string) (*bytes.Buffer, error) {
+	buf := bytes.NewBuffer(nil)
+	tw := tar.NewWriter(buf)
+	defer tw.Close()
+
+	root, err := kodataPath(importpath)
+	if err != nil {
+		return nil, err
+	}
+
+	err = filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
+		if path == root {
+			// Add an entry for /var/run/ko
+			return tw.WriteHeader(&tar.Header{
+				Name:     kodataRoot,
+				Typeflag: tar.TypeDir,
+			})
+		}
+		if err != nil {
+			return err
+		}
+		// Skip other directories.
+		if info.Mode().IsDir() {
+			return nil
+		}
+
+		// Chase symlinks.
+		info, err = os.Stat(path)
+		if err != nil {
+			return err
+		}
+
+		// Open the file to copy it into the tarball.
+		file, err := os.Open(path)
+		if err != nil {
+			return err
+		}
+		defer file.Close()
+
+		// Copy the file into the image tarball.
+		newPath := filepath.Join(kodataRoot, path[len(root):])
+		if err := tw.WriteHeader(&tar.Header{
+			Name:     newPath,
+			Size:     info.Size(),
+			Typeflag: tar.TypeReg,
+			// Use a fixed Mode, so that this isn't sensitive to the directory and umask
+			// under which it was created. Additionally, windows can only set 0222,
+			// 0444, or 0666, none of which are executable.
+			Mode: 0555,
+		}); err != nil {
+			return err
+		}
+		_, err = io.Copy(tw, file)
+		return err
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return buf, nil
+}
+
+// Build implements build.Interface
+func (gb *gobuild) Build(s string) (v1.Image, error) {
+	// Do the build into a temporary file.
+	file, err := gb.build(s)
+	if err != nil {
+		return nil, err
+	}
+	defer os.RemoveAll(filepath.Dir(file))
+
+	var layers []v1.Layer
+	// Create a layer from the kodata directory under this import path.
+	dataLayerBuf, err := tarKoData(s)
+	if err != nil {
+		return nil, err
+	}
+	dataLayerBytes := dataLayerBuf.Bytes()
+	dataLayer, err := tarball.LayerFromOpener(func() (io.ReadCloser, error) {
+		return ioutil.NopCloser(bytes.NewBuffer(dataLayerBytes)), nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	layers = append(layers, dataLayer)
+
+	appPath := filepath.Join(appDir, appFilename(s))
+
+	// Construct a tarball with the binary and produce a layer.
+	binaryLayerBuf, err := tarBinary(appPath, file)
+	if err != nil {
+		return nil, err
+	}
+	binaryLayerBytes := binaryLayerBuf.Bytes()
+	binaryLayer, err := tarball.LayerFromOpener(func() (io.ReadCloser, error) {
+		return ioutil.NopCloser(bytes.NewBuffer(binaryLayerBytes)), nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	layers = append(layers, binaryLayer)
+
+	// Determine the appropriate base image for this import path.
+	base, err := gb.getBase(s)
+	if err != nil {
+		return nil, err
+	}
+
+	// Augment the base image with our application layer.
+	withApp, err := mutate.AppendLayers(base, layers...)
+	if err != nil {
+		return nil, err
+	}
+
+	// Start from a copy of the base image's config file, and set
+	// the entrypoint to our app.
+	cfg, err := withApp.ConfigFile()
+	if err != nil {
+		return nil, err
+	}
+
+	cfg = cfg.DeepCopy()
+	cfg.Config.Entrypoint = []string{appPath}
+	cfg.Config.Env = append(cfg.Config.Env, "KO_DATA_PATH="+kodataRoot)
+
+	image, err := mutate.Config(withApp, cfg.Config)
+	if err != nil {
+		return nil, err
+	}
+
+	empty := v1.Time{}
+	if gb.creationTime != empty {
+		return mutate.CreatedAt(image, gb.creationTime)
+	}
+	return image, nil
+}

vendor/github.com/google/ko/pkg/build/options.go

@@ -0,0 +1,46 @@
+// Copyright 2018 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package build
+
+import (
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+)
+
+// WithBaseImages is a functional option for overriding the base images
+// that are used for different images.
+func WithBaseImages(gb GetBase) Option {
+	return func(gbo *gobuildOpener) error {
+		gbo.getBase = gb
+		return nil
+	}
+}
+
+// WithCreationTime is a functional option for overriding the creation
+// time given to images.
+func WithCreationTime(t v1.Time) Option {
+	return func(gbo *gobuildOpener) error {
+		gbo.creationTime = t
+		return nil
+	}
+}
+
+// withBuilder is a functional option for overriding the way go binaries
+// are built.  This is exposed for testing.
+func withBuilder(b builder) Option {
+	return func(gbo *gobuildOpener) error {
+		gbo.build = b
+		return nil
+	}
+}

vendor/github.com/google/ko/pkg/build/recorder.go

@@ -0,0 +1,46 @@
+// Copyright 2018 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package build
+
+import (
+	"sync"
+
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+)
+
+// Recorder composes with another Interface to record the built import paths.
+type Recorder struct {
+	m           sync.Mutex
+	ImportPaths []string
+	Builder     Interface
+}
+
+// Recorder implements Interface
+var _ Interface = (*Recorder)(nil)
+
+// IsSupportedReference implements Interface
+func (r *Recorder) IsSupportedReference(ip string) bool {
+	return r.Builder.IsSupportedReference(ip)
+}
+
+// Build implements Interface
+func (r *Recorder) Build(ip string) (v1.Image, error) {
+	func() {
+		r.m.Lock()
+		defer r.m.Unlock()
+		r.ImportPaths = append(r.ImportPaths, ip)
+	}()
+	return r.Builder.Build(ip)
+}

vendor/github.com/google/ko/pkg/build/shared.go

@@ -0,0 +1,79 @@
+// Copyright 2018 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package build
+
+import (
+	"sync"
+
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+)
+
+// Caching wraps a builder implementation in a layer that shares build results
+// for the same inputs using a simple "future" implementation.  Cached results
+// may be invalidated by calling Invalidate with the same input passed to Build.
+type Caching struct {
+	inner Interface
+
+	m       sync.Mutex
+	results map[string]*future
+}
+
+// Caching implements Interface
+var _ Interface = (*Caching)(nil)
+
+// NewCaching wraps the provided build.Interface in an implementation that
+// shares build results for a given path until the result has been invalidated.
+func NewCaching(inner Interface) (*Caching, error) {
+	return &Caching{
+		inner:   inner,
+		results: make(map[string]*future),
+	}, nil
+}
+
+// Build implements Interface
+func (c *Caching) Build(ip string) (v1.Image, error) {
+	f := func() *future {
+		// Lock the map of futures.
+		c.m.Lock()
+		defer c.m.Unlock()
+
+		// If a future for "ip" exists, then return it.
+		f, ok := c.results[ip]
+		if ok {
+			return f
+		}
+		// Otherwise create and record a future for a Build of "ip".
+		f = newFuture(func() (v1.Image, error) {
+			return c.inner.Build(ip)
+		})
+		c.results[ip] = f
+		return f
+	}()
+
+	return f.Get()
+}
+
+// IsSupportedReference implements Interface
+func (c *Caching) IsSupportedReference(ip string) bool {
+	return c.inner.IsSupportedReference(ip)
+}
+
+// Invalidate removes an import path's cached results.
+func (c *Caching) Invalidate(ip string) {
+	c.m.Lock()
+	defer c.m.Unlock()
+
+	delete(c.results, ip)
+}