12 files changed, 83 insertions, 61 deletions
diff --git a/vendor/github.com/opencontainers/go-digest/.mailmap b/vendor/github.com/opencontainers/go-digest/.mailmap
index ba611cb21..eaf8b2f9e 100644
--- a/vendor/github.com/opencontainers/go-digest/.mailmap
+++ b/vendor/github.com/opencontainers/go-digest/.mailmap
@@ -1 +1,4 @@
+Aaron Lehmann <aaronl@vitelus.com> <aaron.lehmann@docker.com>
+Derek McGowan <derek@mcg.dev> <derek@mcgstyle.net>
 Stephen J Day <stephen.day@docker.com> <stevvooe@users.noreply.github.com>
+Haibing Zhou <zhouhaibing089@gmail.com>
diff --git a/vendor/github.com/opencontainers/go-digest/.pullapprove.yml b/vendor/github.com/opencontainers/go-digest/.pullapprove.yml
index 45fa4b9ec..b6165f83c 100644
--- a/vendor/github.com/opencontainers/go-digest/.pullapprove.yml
+++ b/vendor/github.com/opencontainers/go-digest/.pullapprove.yml
@@ -1,12 +1,28 @@
-approve_by_comment: true
-approve_regex: '^(Approved|lgtm|LGTM|:shipit:|:star:|:\+1:|:ship:)'
-reject_regex: ^Rejected
-reset_on_push: true
-author_approval: ignored
-signed_off_by:
-  required: true
-reviewers:
-  teams:
-  - go-digest-maintainers
-  name: default
+version: 2
+
+requirements:
+  signed_off_by:
+    required: true
+
+always_pending:
+  title_regex: '^WIP'
+  explanation: 'Work in progress...'
+
+group_defaults:
   required: 2
+  approve_by_comment:
+    enabled: true
+    approve_regex: '^LGTM'
+    reject_regex: '^Rejected'
+  reset_on_push:
+    enabled: true
+  author_approval:
+    ignored: true
+  conditions:
+    branches:
+      - master
+
+groups:
+  go-digest:
+    teams:
+      - go-digest-maintainers
diff --git a/vendor/github.com/opencontainers/go-digest/.travis.yml b/vendor/github.com/opencontainers/go-digest/.travis.yml
index 7ea4ed1d2..5775f885c 100644
--- a/vendor/github.com/opencontainers/go-digest/.travis.yml
+++ b/vendor/github.com/opencontainers/go-digest/.travis.yml
@@ -1,4 +1,5 @@
 language: go
 go:
-  - 1.7
+  - 1.12.x
+  - 1.13.x
   - master
diff --git a/vendor/github.com/opencontainers/go-digest/LICENSE.code b/vendor/github.com/opencontainers/go-digest/LICENSE
index 0ea3ff81e..3ac8ab648 100644
--- a/vendor/github.com/opencontainers/go-digest/LICENSE.code
+++ b/vendor/github.com/opencontainers/go-digest/LICENSE
@@ -176,6 +176,7 @@
 
    END OF TERMS AND CONDITIONS
 
+   Copyright 2019, 2020 OCI Contributors
    Copyright 2016 Docker, Inc.
 
    Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/vendor/github.com/opencontainers/go-digest/MAINTAINERS b/vendor/github.com/opencontainers/go-digest/MAINTAINERS
index 42a29795d..843b1b206 100644
--- a/vendor/github.com/opencontainers/go-digest/MAINTAINERS
+++ b/vendor/github.com/opencontainers/go-digest/MAINTAINERS
@@ -1,9 +1,5 @@
-Aaron Lehmann <aaron.lehmann@docker.com> (@aaronlehmann)
-Brandon Philips <brandon.philips@coreos.com> (@philips)
-Brendan Burns <bburns@microsoft.com> (@brendandburns)
 Derek McGowan <derek@mcgstyle.net> (@dmcgowan)
-Jason Bouzane <jbouzane@google.com> (@jbouzane)
-John Starks <jostarks@microsoft.com> (@jstarks)
-Jonathan Boulle <jon.boulle@coreos.com> (@jonboulle)
-Stephen Day <stephen.day@docker.com> (@stevvooe)
-Vincent Batts <vbatts@redhat.com> (@vbatts)
+Stephen Day <stevvooe@gmail.com> (@stevvooe)
+Vincent Batts <vbatts@hashbangbash.com> (@vbatts)
+Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp> (@AkihiroSuda)
+Sebastiaan van Stijn <github@gone.nl> (@thaJeztah)
diff --git a/vendor/github.com/opencontainers/go-digest/README.md b/vendor/github.com/opencontainers/go-digest/README.md
index 0f5a04092..a11287207 100644
--- a/vendor/github.com/opencontainers/go-digest/README.md
+++ b/vendor/github.com/opencontainers/go-digest/README.md
@@ -8,20 +8,16 @@ Please see the [godoc](https://godoc.org/github.com/opencontainers/go-digest) fo
 
 # What is a digest?
 
-A digest is just a hash.
+A digest is just a [hash](https://en.wikipedia.org/wiki/Hash_function).
 
-The most common use case for a digest is to create a content
-identifier for use in [Content Addressable Storage](https://en.wikipedia.org/wiki/Content-addressable_storage)
-systems:
+The most common use case for a digest is to create a content identifier for use in [Content Addressable Storage](https://en.wikipedia.org/wiki/Content-addressable_storage) systems:
 
 ```go
 id := digest.FromBytes([]byte("my content"))
 ```
 
-In the example above, the id can be used to uniquely identify 
-the byte slice "my content". This allows two disparate applications
-to agree on a verifiable identifier without having to trust one
-another.
+In the example above, the id can be used to uniquely identify the byte slice "my content".
+This allows two disparate applications to agree on a verifiable identifier without having to trust one another.
 
 An identifying digest can be verified, as follows:
 
@@ -31,8 +27,7 @@ if id != digest.FromBytes([]byte("my content")) {
 }
 ```
 
-A `Verifier` type can be used to handle cases where an `io.Reader`
-makes more sense:
+A `Verifier` type can be used to handle cases where an `io.Reader` makes more sense:
 
 ```go
 rd := getContent()
@@ -44,33 +39,28 @@ if !verifier.Verified() {
 }
 ```
 
-Using [Merkle DAGs](https://en.wikipedia.org/wiki/Merkle_tree), this
-can power a rich, safe, content distribution system.
+Using [Merkle DAGs](https://en.wikipedia.org/wiki/Merkle_tree), this can power a rich, safe, content distribution system.
 
 # Usage
 
-While the [godoc](https://godoc.org/github.com/opencontainers/go-digest) is
-considered the best resource, a few important items need to be called 
-out when using this package.
+While the [godoc](https://godoc.org/github.com/opencontainers/go-digest) is considered the best resource, a few important items need to be called out when using this package.
 
-1. Make sure to import the hash implementations into your application
-    or the package will panic. You should have something like the 
-    following in the main (or other entrypoint) of your application:
+1. Make sure to import the hash implementations into your application or the package will panic.
+    You should have something like the following in the main (or other entrypoint) of your application:
    
     ```go
     import (
         _ "crypto/sha256"
-   	    _ "crypto/sha512"
+        _ "crypto/sha512"
     )
     ```
     This may seem inconvenient but it allows you replace the hash 
     implementations with others, such as https://github.com/stevvooe/resumable.
  
-2. Even though `digest.Digest` may be assemable as a string, _always_ 
-    verify your input with `digest.Parse` or use `Digest.Validate`
-    when accepting untrusted input. While there are measures to 
-    avoid common problems, this will ensure you have valid digests
-    in the rest of your application.
+2. Even though `digest.Digest` may be assemblable as a string, _always_ verify your input with `digest.Parse` or use `Digest.Validate` when accepting untrusted input.
+    While there are measures to avoid common problems, this will ensure you have valid digests in the rest of your application.
+
+3. While alternative encodings of hash values (digests) are possible (for example, base64), this package deals exclusively with hex-encoded digests.
 
 # Stability
 
@@ -80,25 +70,27 @@ As always, before using a package export, read the [godoc](https://godoc.org/git
 
 # Contributing
 
-This package is considered fairly complete. It has been in production
-in thousands (millions?) of deployments and is fairly battle-hardened.
-New additions will be met with skepticism. If you think there is a 
-missing feature, please file a bug clearly describing the problem and 
-the alternatives you tried before submitting a PR.
+This package is considered fairly complete.
+It has been in production in thousands (millions?) of deployments and is fairly battle-hardened.
+New additions will be met with skepticism.
+If you think there is a missing feature, please file a bug clearly describing the problem and the alternatives you tried before submitting a PR.
 
-# Reporting security issues
+## Code of Conduct
 
-Please DO NOT file a public issue, instead send your report privately to
-security@opencontainers.org.
+Participation in the OpenContainers community is governed by [OpenContainer's Code of Conduct][code-of-conduct].
 
-The maintainers take security seriously. If you discover a security issue,
-please bring it to their attention right away!
+## Security
 
-If you are reporting a security issue, do not create an issue or file a pull
-request on GitHub. Instead, disclose the issue responsibly by sending an email
-to security@opencontainers.org (which is inhabited only by the maintainers of
-the various OCI projects).
+If you find an issue, please follow the [security][security] protocol to report it.
 
 # Copyright and license
 
-Copyright © 2016 Docker, Inc. All rights reserved, except as follows. Code is released under the [Apache 2.0 license](LICENSE.code). This `README.md` file and the [`CONTRIBUTING.md`](CONTRIBUTING.md) file are licensed under the Creative Commons Attribution 4.0 International License under the terms and conditions set forth in the file [`LICENSE.docs`](LICENSE.docs). You may obtain a duplicate copy of the same license, titled CC BY-SA 4.0, at http://creativecommons.org/licenses/by-sa/4.0/.
+Copyright © 2019, 2020 OCI Contributors
+Copyright © 2016 Docker, Inc.
+All rights reserved, except as follows.
+Code is released under the [Apache 2.0 license](LICENSE).
+This `README.md` file and the [`CONTRIBUTING.md`](CONTRIBUTING.md) file are licensed under the Creative Commons Attribution 4.0 International License under the terms and conditions set forth in the file [`LICENSE.docs`](LICENSE.docs).
+You may obtain a duplicate copy of the same license, titled CC BY-SA 4.0, at http://creativecommons.org/licenses/by-sa/4.0/.
+
+[security]: https://github.com/opencontainers/org/blob/master/security
+[code-of-conduct]: https://github.com/opencontainers/org/blob/master/CODE_OF_CONDUCT.md
diff --git a/vendor/github.com/opencontainers/go-digest/algorithm.go b/vendor/github.com/opencontainers/go-digest/algorithm.go
index 8813bd26f..490951dc3 100644
--- a/vendor/github.com/opencontainers/go-digest/algorithm.go
+++ b/vendor/github.com/opencontainers/go-digest/algorithm.go
@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/vendor/github.com/opencontainers/go-digest/digest.go b/vendor/github.com/opencontainers/go-digest/digest.go
index ad398cba2..518b5e715 100644
--- a/vendor/github.com/opencontainers/go-digest/digest.go
+++ b/vendor/github.com/opencontainers/go-digest/digest.go
@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/vendor/github.com/opencontainers/go-digest/digester.go b/vendor/github.com/opencontainers/go-digest/digester.go
index 36fa2728e..ede907757 100644
--- a/vendor/github.com/opencontainers/go-digest/digester.go
+++ b/vendor/github.com/opencontainers/go-digest/digester.go
@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/vendor/github.com/opencontainers/go-digest/doc.go b/vendor/github.com/opencontainers/go-digest/doc.go
index 491ea1ef1..83d3a936c 100644
--- a/vendor/github.com/opencontainers/go-digest/doc.go
+++ b/vendor/github.com/opencontainers/go-digest/doc.go
@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
@@ -29,8 +30,13 @@
 //
 // 	sha256:7173b809ca12ec5dee4506cd86be934c4596dd234ee82c0662eac04a8c2c71dc
 //
-// In this case, the string "sha256" is the algorithm and the hex bytes are
-// the "digest".
+// The "algorithm" portion defines both the hashing algorithm used to calculate
+// the digest and the encoding of the resulting digest, which defaults to "hex"
+// if not otherwise specified. Currently, all supported algorithms have their
+// digests encoded in hex strings.
+//
+// In the example above, the string "sha256" is the algorithm and the hex bytes
+// are the "digest".
 //
 // Because the Digest type is simply a string, once a valid Digest is
 // obtained, comparisons are cheap, quick and simple to express with the
diff --git a/vendor/github.com/opencontainers/go-digest/go.mod b/vendor/github.com/opencontainers/go-digest/go.mod
new file mode 100644
index 000000000..cf5d7b1d2
--- /dev/null
+++ b/vendor/github.com/opencontainers/go-digest/go.mod
@@ -0,0 +1,3 @@
+module github.com/opencontainers/go-digest
+
+go 1.13
diff --git a/vendor/github.com/opencontainers/go-digest/verifiers.go b/vendor/github.com/opencontainers/go-digest/verifiers.go
index 32125e918..afef506f4 100644
--- a/vendor/github.com/opencontainers/go-digest/verifiers.go
+++ b/vendor/github.com/opencontainers/go-digest/verifiers.go
@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");