--- /dev/null
+From a49f22efd84d1cc656242319cca27cbdf8852e05 Mon Sep 17 00:00:00 2001
+From: William Hubbs <whubbs@gaikai.com>
+Date: Fri, 23 Jun 2017 12:34:25 -0500
+Subject: [PATCH] make ostree optional
+
+---
+ vendor/github.com/containers/image/README.md | 14 ++++++---
+ .../transports/alltransports/alltransports.go | 2 +-
+ .../image/transports/alltransports/ostree.go | 8 +++++
+ .../image/transports/alltransports/ostree_stub.go | 9 ++++++
+ .../github.com/containers/image/transports/stub.go | 36 ++++++++++++++++++++++
+ .../containers/image/transports/stub_test.go | 18 +++++++++++
+ 6 files changed, 82 insertions(+), 5 deletions(-)
+ create mode 100644 vendor/github.com/containers/image/transports/alltransports/ostree.go
+ create mode 100644 vendor/github.com/containers/image/transports/alltransports/ostree_stub.go
+ create mode 100644 vendor/github.com/containers/image/transports/stub.go
+ create mode 100644 vendor/github.com/containers/image/transports/stub_test.go
+
+diff --git a/vendor/github.com/containers/image/README.md b/vendor/github.com/containers/image/README.md
+index ca8afd4..8e812bb 100644
+--- a/vendor/github.com/containers/image/README.md
++++ b/vendor/github.com/containers/image/README.md
+@@ -51,14 +51,20 @@ Ensure that the dependencies documented [in vendor.conf](https://github.com/cont
+ are also available
+ (using those exact versions or different versions of your choosing).
+
+-This library, by default, also depends on the GpgME C library. Either install it:
++This library, by default, also depends on the GpgME and libostree C libraries. Either install them:
+ ```sh
+-Fedora$ dnf install gpgme-devel libassuan-devel
++Fedora$ dnf install gpgme-devel libassuan-devel libostree-devel
+ macOS$ brew install gpgme
+ ```
+-or use the `containers_image_openpgp` build tag (e.g. using `go build -tags …`)
+-This will use a Golang-only OpenPGP implementation for signature verification instead of the default cgo/gpgme-based implementation;
++or use the build tags described below to avoid the dependencies (e.g. using `go build -tags …`)
++
++### Supported build tags
++
++- `containers_image_openpgp`: Use a Golang-only OpenPGP implementation for signature verification instead of the default cgo/gpgme-based implementation;
+ the primary downside is that creating new signatures with the Golang-only implementation is not supported.
++- `containers_image_ostree_stub`: Instead of importing `ostree:` transport in `github.com/containers/image/transports/alltransports`, use a stub which reports that the transport is not supported. This allows building the library without requiring the `libostree` development libraries.
++
++ (Note that explicitly importing `github.com/containers/image/ostree` will still depend on the `libostree` library, this build tag only affects generic users of …`/alltransports`.)
+
+ ## Contributing
+
+diff --git a/vendor/github.com/containers/image/transports/alltransports/alltransports.go b/vendor/github.com/containers/image/transports/alltransports/alltransports.go
+index dc70fad..dd80b7f 100644
+--- a/vendor/github.com/containers/image/transports/alltransports/alltransports.go
++++ b/vendor/github.com/containers/image/transports/alltransports/alltransports.go
+@@ -12,7 +12,7 @@ import (
+ _ "github.com/containers/image/docker/daemon"
+ _ "github.com/containers/image/oci/layout"
+ _ "github.com/containers/image/openshift"
+- _ "github.com/containers/image/ostree"
++ // The ostree transport is registered by ostree*.go
+ _ "github.com/containers/image/storage"
+ "github.com/containers/image/transports"
+ "github.com/containers/image/types"
+diff --git a/vendor/github.com/containers/image/transports/alltransports/ostree.go b/vendor/github.com/containers/image/transports/alltransports/ostree.go
+new file mode 100644
+index 0000000..0fc5d7e
+--- /dev/null
++++ b/vendor/github.com/containers/image/transports/alltransports/ostree.go
+@@ -0,0 +1,8 @@
++// +build !containers_image_ostree_stub
++
++package alltransports
++
++import (
++ // Register the ostree transport
++ _ "github.com/containers/image/ostree"
++)
+diff --git a/vendor/github.com/containers/image/transports/alltransports/ostree_stub.go b/vendor/github.com/containers/image/transports/alltransports/ostree_stub.go
+new file mode 100644
+index 0000000..8b01afe
+--- /dev/null
++++ b/vendor/github.com/containers/image/transports/alltransports/ostree_stub.go
+@@ -0,0 +1,9 @@
++// +build containers_image_ostree_stub
++
++package alltransports
++
++import "github.com/containers/image/transports"
++
++func init() {
++ transports.Register(transports.NewStubTransport("ostree"))
++}
+diff --git a/vendor/github.com/containers/image/transports/stub.go b/vendor/github.com/containers/image/transports/stub.go
+new file mode 100644
+index 0000000..087f69b
+--- /dev/null
++++ b/vendor/github.com/containers/image/transports/stub.go
+@@ -0,0 +1,36 @@
++package transports
++
++import (
++ "fmt"
++
++ "github.com/containers/image/types"
++)
++
++// stubTransport is an implementation of types.ImageTransport which has a name, but rejects any references with “the transport $name: is not supported in this build”.
++type stubTransport string
++
++// NewStubTransport returns an implementation of types.ImageTransport which has a name, but rejects any references with “the transport $name: is not supported in this build”.
++func NewStubTransport(name string) types.ImageTransport {
++ return stubTransport(name)
++}
++
++// Name returns the name of the transport, which must be unique among other transports.
++func (s stubTransport) Name() string {
++ return string(s)
++}
++
++// ParseReference converts a string, which should not start with the ImageTransport.Name prefix, into an ImageReference.
++func (s stubTransport) ParseReference(reference string) (types.ImageReference, error) {
++ return nil, fmt.Errorf(`The transport "%s:" is not supported in this build`, string(s))
++}
++
++// ValidatePolicyConfigurationScope checks that scope is a valid name for a signature.PolicyTransportScopes keys
++// (i.e. a valid PolicyConfigurationIdentity() or PolicyConfigurationNamespaces() return value).
++// It is acceptable to allow an invalid value which will never be matched, it can "only" cause user confusion.
++// scope passed to this function will not be "", that value is always allowed.
++func (s stubTransport) ValidatePolicyConfigurationScope(scope string) error {
++ // Allowing any reference in here allows tools with some transports stubbed-out to still
++ // use signature verification policies which refer to these stubbed-out transports.
++ // See also the treatment of unknown transports in policyTransportScopesWithTransport.UnmarshalJSON .
++ return nil
++}
+diff --git a/vendor/github.com/containers/image/transports/stub_test.go b/vendor/github.com/containers/image/transports/stub_test.go
+new file mode 100644
+index 0000000..f181a1a
+--- /dev/null
++++ b/vendor/github.com/containers/image/transports/stub_test.go
+@@ -0,0 +1,18 @@
++package transports
++
++import (
++ "testing"
++
++ "github.com/stretchr/testify/assert"
++)
++
++func TestStubTransport(t *testing.T) {
++ const name = "whatever"
++
++ s := NewStubTransport(name)
++ assert.Equal(t, name, s.Name())
++ _, err := s.ParseReference("this is rejected regardless of content")
++ assert.Error(t, err)
++ err = s.ValidatePolicyConfigurationScope("this is accepted regardless of content")
++ assert.NoError(t, err)
++}
+--
+2.13.0
+
--- /dev/null
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+EGO_PN=github.com/projectatomic/skopeo
+COMMIT=5d24b67
+inherit golang-vcs-snapshot
+
+DESCRIPTION="Command line utility foroperations on container images and image repositories"
+HOMEPAGE="http://github.com/projectatomic/skopeo"
+SRC_URI="https://github.com/projectatomic/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE=""
+
+COMMON_DEPEND=">=app-crypt/gpgme-1.5.5:=
+ >=dev-libs/libassuan-2.4.3
+ >=sys-fs/btrfs-progs-4.0.1
+ >=sys-fs/lvm2-2.02.145"
+DEPEND="${COMMON_DEPEND}
+dev-go/go-md2man"
+RDEPEND="${COMMON_DEPEND}"
+
+PATCHES=(
+ "${FILESDIR}"/${P}-make-ostree-optional.patch
+)
+
+S="${WORKDIR}/${P}/src/${EGO_PN}"
+
+RESTRICT="test"
+
+src_compile() {
+ local BUILDTAGS="containers_image_ostree_stub"
+ set -- env GOPATH="${WORKDIR}/${P}" \
+ go build -ldflags "-X main.gitCommit=${COMMIT}" \
+ -gcflags "${GOGCFLAGS}" -tags "${BUILDTAGS}" \
+ -o skopeo ./cmd/skopeo
+ echo "$@"
+ "$@" || die
+ cd docs
+ for f in *.1.md; do
+ go-md2man -in ${f} -out ${f%%.md} || die
+ done
+}
+
+src_install() {
+ dobin skopeo
+doman docs/*.1
+ insinto /etc/containers
+ newins default-policy.json policy.json
+ insinto /etc/containers/registries.d
+ doins default.yaml
+ dodir /var/lib/atomic/sigstore
+ einstalldocs
+}