Migrate to go mod

frontend/dockerfile/cmd/dockerfile-frontend/Dockerfile

@@ -4,10 +4,12 @@ FROM --platform=$BUILDPLATFORM tonistiigi/xx:golang@sha256:6f7d999551dd471b58f70
 
 FROM --platform=$BUILDPLATFORM golang:1.11 AS base
 COPY --from=xgo / /
-WORKDIR /go/src/github.com/moby/buildkit
+WORKDIR /src
+ENV GOFLAGS=-mod=vendor
 
 FROM base AS version
 ARG CHANNEL
+# TODO: PKG should be inferred from go modules
 RUN --mount=target=. \ 
   PKG=github.com/moby/buildkit/frontend/dockerfile/cmd/dockerfile-frontend VERSION=$(./frontend/dockerfile/cmd/dockerfile-frontend/hack/detect "$CHANNEL") REVISION=$(git rev-parse HEAD)$(if ! git diff --no-ext-diff --quiet --exit-code; then echo .m; fi); \
   echo "-X main.Version=${VERSION} -X main.Revision=${REVISION} -X main.Package=${PKG}" | tee /tmp/.ldflags; \
@@ -19,6 +21,7 @@ ARG BUILDTAGS=""
 ARG TARGETPLATFORM
 ENV TARGETPLATFORM=$TARGETPLATFORM
 RUN --mount=target=. --mount=type=cache,target=/root/.cache \
+  --mount=target=/go/pkg/mod,type=cache \
   --mount=source=/tmp/.ldflags,target=/tmp/.ldflags,from=version \
   CGO_ENABLED=0 go build -o /dockerfile-frontend -ldflags "-d $(cat /tmp/.ldflags)" -tags "$BUILDTAGS netgo static_build osusergo" ./frontend/dockerfile/cmd/dockerfile-frontend && \
   file /dockerfile-frontend | grep "statically linked"
@@ -42,4 +45,4 @@ RUN ./check-daily-outdated $CHANNEL $REPO $DATE /out
 FROM scratch AS buildid
 COPY --from=buildid-check /out/ /
 
-FROM release
+FROM release

go.mod

@@ -0,0 +1,81 @@
+module github.com/moby/buildkit
+
+go 1.11
+
+require (
+	github.com/BurntSushi/toml v0.3.1
+	github.com/Microsoft/go-winio v0.4.11
+	github.com/Microsoft/hcsshim v0.7.9 // indirect
+	github.com/apache/thrift v0.0.0-20161221203622-b2a4d4ae21c7 // indirect
+	github.com/codahale/hdrhistogram v0.0.0-20160425231609-f8ad88b59a58 // indirect
+	github.com/containerd/cgroups v0.0.0-20181219155423-39b18af02c41 // indirect
+	github.com/containerd/console v0.0.0-20180822173158-c12b1e7919c1
+	github.com/containerd/containerd v0.0.0-20181221132743-47b328aab791
+	github.com/containerd/continuity v0.0.0-20181001140422-bd77b46c8352
+	github.com/containerd/cri v0.0.0-20181012222137-f913714917d2 // indirect
+	github.com/containerd/fifo v0.0.0-20180307165137-3d5202aec260 // indirect
+	github.com/containerd/go-runc v0.0.0-20180907222934-5a6d9f37cfa3
+	github.com/containerd/typeurl v0.0.0-20180627222232-a93fcdb778cd // indirect
+	github.com/coreos/go-systemd v0.0.0-20181031085051-9002847aa142 // indirect
+	github.com/davecgh/go-spew v1.1.0 // indirect
+	github.com/docker/cli v0.0.0-20190131223713-234462756460
+	github.com/docker/distribution v0.0.0-20170825220652-30578ca32960
+	github.com/docker/docker v0.0.0-20180531152204-71cd53e4a197
+	github.com/docker/docker-credential-helpers v0.6.0 // indirect
+	github.com/docker/go-connections v0.3.0
+	github.com/docker/go-events v0.0.0-20170721190031-9461782956ad // indirect
+	github.com/docker/go-units v0.3.1 // indirect
+	github.com/docker/libnetwork v0.0.0-20180913200009-36d3bed0e9f4
+	github.com/godbus/dbus v4.1.0+incompatible // indirect
+	github.com/gofrs/flock v0.7.0
+	github.com/gogo/googleapis v0.0.0-20180501115203-b23578765ee5
+	github.com/gogo/protobuf v1.0.0
+	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b // indirect
+	github.com/golang/protobuf v1.2.0
+	github.com/google/go-cmp v0.2.0
+	github.com/google/shlex v0.0.0-20150127133951-6f45313302b9
+	github.com/gotestyourself/gotestyourself v2.2.0+incompatible // indirect
+	github.com/grpc-ecosystem/grpc-opentracing v0.0.0-20180507213350-8e809c8a8645
+	github.com/hashicorp/go-immutable-radix v1.0.0
+	github.com/hashicorp/golang-lru v0.0.0-20160207214719-a0d98a5f2880
+	github.com/hashicorp/uuid v0.0.0-20160311170451-ebb0a03e909c // indirect
+	github.com/ishidawataru/sctp v0.0.0-20180213033435-07191f837fed // indirect
+	github.com/kr/pretty v0.1.0 // indirect
+	github.com/mitchellh/hashstructure v0.0.0-20170609045927-2bca23e0e452
+	github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c
+	github.com/onsi/ginkgo v1.7.0 // indirect
+	github.com/onsi/gomega v1.4.3 // indirect
+	github.com/opencontainers/go-digest v0.0.0-20180430190053-c9281466c8b2
+	github.com/opencontainers/image-spec v1.0.1
+	github.com/opencontainers/runc v0.0.0-20190115041553-12f6a991201f
+	github.com/opencontainers/runtime-spec v0.0.0-20180909173843-eba862dc2470
+	github.com/opentracing-contrib/go-stdlib v0.0.0-20171029140428-b1a47cfbdd75
+	github.com/opentracing/opentracing-go v0.0.0-20171003133519-1361b9cd60be
+	github.com/pkg/errors v0.8.0
+	github.com/pkg/profile v1.2.1
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/sirupsen/logrus v1.0.3
+	github.com/stretchr/testify v1.1.4
+	github.com/syndtr/gocapability v0.0.0-20170704070218-db04d3cc01c8 // indirect
+	github.com/tonistiigi/fsutil v0.0.0-20181011223333-2862f6bc5ac9
+	github.com/tonistiigi/units v0.0.0-20180711220420-6950e57a87ea
+	github.com/uber/jaeger-client-go v0.0.0-20180103221425-e02c85f9069e
+	github.com/uber/jaeger-lib v1.2.1 // indirect
+	github.com/urfave/cli v0.0.0-20171014202726-7bc6a0acffa5
+	github.com/vishvananda/netlink v1.0.0 // indirect
+	github.com/vishvananda/netns v0.0.0-20180720170159-13995c7128cc // indirect
+	go.etcd.io/bbolt v1.3.1-etcd.8
+	golang.org/x/crypto v0.0.0-20180904163835-0709b304e793
+	golang.org/x/net v0.0.0-20180906233101-161cd47e91fd
+	golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f
+	golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e
+	golang.org/x/time v0.0.0-20161028155119-f51c12702a4d
+	google.golang.org/genproto v0.0.0-20170523043604-d80a6e20e776
+	google.golang.org/grpc v1.12.0
+	gopkg.in/airbrake/gobrake.v2 v2.0.9 // indirect
+	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
+	gopkg.in/gemnasium/logrus-airbrake-hook.v2 v2.1.2 // indirect
+	gotest.tools v2.1.0+incompatible
+)
+
+replace github.com/hashicorp/go-immutable-radix => github.com/tonistiigi/go-immutable-radix v0.0.0-20170803185627-826af9ccf0fe