hack: embed git revison into binaries

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

.dockerignore

@@ -1,2 +1,2 @@
 bin
-.buildstate
+.tmp

.gitignore

@@ -1,2 +1,2 @@
 bin
-.buildstate
+.tmp

cmd/buildctl/main.go

@@ -8,12 +8,16 @@ import (
 	"github.com/moby/buildkit/client"
 	"github.com/moby/buildkit/util/appdefaults"
 	"github.com/moby/buildkit/util/profiler"
+	"github.com/moby/buildkit/version"
 	opentracing "github.com/opentracing/opentracing-go"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
 )
 
 func main() {
+	cli.VersionPrinter = func(c *cli.Context) {
+		fmt.Println(c.App.Name, version.Package, c.App.Version, version.Revision)
+	}
 	app := cli.NewApp()
 	app.Name = "buildctl"
 	app.Usage = "build utility"

cmd/buildkitd/main.go

@@ -27,6 +27,7 @@ import (
 	"github.com/moby/buildkit/util/appcontext"
 	"github.com/moby/buildkit/util/appdefaults"
 	"github.com/moby/buildkit/util/profiler"
+	"github.com/moby/buildkit/version"
 	"github.com/moby/buildkit/worker"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
@@ -62,6 +63,9 @@ func registerWorkerInitializer(wi workerInitializer, flags ...cli.Flag) {
 }
 
 func main() {
+	cli.VersionPrinter = func(c *cli.Context) {
+		fmt.Println(c.App.Name, version.Package, c.App.Version, version.Revision)
+	}
 	app := cli.NewApp()
 	app.Name = "buildkitd"
 	app.Usage = "build daemon"

hack/dockerfiles/test.Dockerfile

@@ -16,15 +16,18 @@ RUN apk add --no-cache git libseccomp-dev make
 FROM gobuild-base AS buildkit-base
 WORKDIR /go/src/github.com/moby/buildkit
 COPY . .
+RUN mkdir .tmp; \
+  PKG=github.com/moby/buildkit VERSION=$(git describe --match 'v[0-9]*' --dirty='.m' --always) REVISION=$(git rev-parse HEAD)$(if ! git diff --no-ext-diff --quiet --exit-code; then echo .m; fi); \
+  echo "-X ${PKG}/version.Version=${VERSION} -X ${PKG}/version.Revision=${REVISION} -X ${PKG}/version.Package=${PKG}" | tee .tmp/ldflags
 
 FROM buildkit-base AS buildctl
 ENV CGO_ENABLED=0
 ARG GOOS=linux
-RUN go build -ldflags '-d' -o /usr/bin/buildctl ./cmd/buildctl
+RUN go build -ldflags "$(cat .tmp/ldflags) -d" -o /usr/bin/buildctl ./cmd/buildctl
 
 FROM buildkit-base AS buildkitd
 ENV CGO_ENABLED=1
-RUN go build -installsuffix netgo -ldflags '-w -extldflags -static' -tags 'seccomp netgo cgo static_build' -o /usr/bin/buildkitd ./cmd/buildkitd
+RUN go build -installsuffix netgo -ldflags "$(cat .tmp/ldflags) -w -extldflags -static" -tags 'seccomp netgo cgo static_build' -o /usr/bin/buildkitd ./cmd/buildkitd
 
 # test dependencies begin here
 FROM gobuild-base AS runc
@@ -61,11 +64,11 @@ COPY --from=containerd /go/src/github.com/containerd/containerd/bin/containerd*
 
 FROM buildkit-base AS buildkitd.oci_only
 ENV CGO_ENABLED=1
-RUN go build -installsuffix netgo -ldflags '-w -extldflags -static' -tags 'no_containerd_worker seccomp netgo cgo static_build' -o /usr/bin/buildkitd.oci_only ./cmd/buildkitd
+RUN go build -installsuffix netgo -ldflags "$(cat .tmp/ldflags) -w -extldflags -static" -tags 'no_containerd_worker seccomp netgo cgo static_build' -o /usr/bin/buildkitd.oci_only ./cmd/buildkitd
 
 FROM buildkit-base AS buildkitd.containerd_only
 ENV CGO_ENABLED=0
-RUN go build -ldflags '-d'  -o /usr/bin/buildkitd.containerd_only -tags no_oci_worker ./cmd/buildkitd
+RUN go build -ldflags "$(cat .tmp/ldflags) -d"  -o /usr/bin/buildkitd.containerd_only -tags no_oci_worker ./cmd/buildkitd
 
 FROM registry:$REGISTRY_VERSION AS registry
 
@@ -81,11 +84,11 @@ WORKDIR /go/src/github.com/moby/buildkit
 COPY . .
 
 FROM cross-windows AS buildctl.exe
-RUN go build -o /buildctl.exe ./cmd/buildctl
+RUN go build -ldflags "$(cat .tmp/ldflags)" -o /buildctl.exe ./cmd/buildctl
 
 FROM cross-windows AS buildkitd.exe
 ENV CGO_ENABLED=0
-RUN go build -o /buildkitd.exe ./cmd/buildkitd
+RUN go build -ldflags "$(cat .tmp/ldflags)" -o /buildkitd.exe ./cmd/buildkitd
 
 FROM alpine AS buildkit-export
 RUN apk add --no-cache git

version/version.go

@@ -0,0 +1,30 @@
+/*
+   Copyright The BuildKit Authors.
+   Copyright The containerd Authors.
+
+   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 version
+
+var (
+	// Package is filled at linking time
+	Package = "github.com/moby/buildkit"
+
+	// Version holds the complete version number. Filled in at linking time.
+	Version = "0.0.0+unknown"
+
+	// Revision is filled with the VCS (e.g. git) revision being used to build
+	// the program at linking time.
+	Revision = ""
+)