Move versioning variables to a separate package.

This helps to avoid circular includes, by separating the pure data out from the
actual functionality in the cli subpackage, allowing other code which is
imported to access the data.

Signed-off-by: Ian Campbell <ijc@docker.com>

cli/command/cli.go

@@ -8,7 +8,6 @@ import (
 	"runtime"
 	"strconv"
 
-	"github.com/docker/cli/cli"
 	"github.com/docker/cli/cli/config"
 	cliconfig "github.com/docker/cli/cli/config"
 	"github.com/docker/cli/cli/config/configfile"
@@ -22,6 +21,7 @@ import (
 	registryclient "github.com/docker/cli/cli/registry/client"
 	"github.com/docker/cli/cli/streams"
 	"github.com/docker/cli/cli/trust"
+	"github.com/docker/cli/cli/version"
 	"github.com/docker/cli/internal/containerizedengine"
 	dopts "github.com/docker/cli/opts"
 	clitypes "github.com/docker/cli/types"
@@ -472,7 +472,7 @@ func getServerHost(hosts []string, tlsOptions *tlsconfig.Options) (string, error
 
 // UserAgent returns the user agent string used for making API requests
 func UserAgent() string {
-	return "Docker-Client/" + cli.Version + " (" + runtime.GOOS + ")"
+	return "Docker-Client/" + version.Version + " (" + runtime.GOOS + ")"
 }
 
 // resolveContextName resolves the current context name with the following rules:

cli/command/system/version.go

@@ -12,6 +12,7 @@ import (
 	"github.com/docker/cli/cli"
 	"github.com/docker/cli/cli/command"
 	kubecontext "github.com/docker/cli/cli/context/kubernetes"
+	"github.com/docker/cli/cli/version"
 	"github.com/docker/cli/kubernetes"
 	"github.com/docker/cli/templates"
 	"github.com/docker/docker/api/types"
@@ -135,13 +136,13 @@ func runVersion(dockerCli command.Cli, opts *versionOptions) error {
 
 	vd := versionInfo{
 		Client: clientVersion{
-			Platform:          struct{ Name string }{cli.PlatformName},
-			Version:           cli.Version,
+			Platform:          struct{ Name string }{version.PlatformName},
+			Version:           version.Version,
 			APIVersion:        dockerCli.Client().ClientVersion(),
 			DefaultAPIVersion: dockerCli.DefaultVersion(),
 			GoVersion:         runtime.Version(),
-			GitCommit:         cli.GitCommit,
-			BuildTime:         reformatDate(cli.BuildTime),
+			GitCommit:         version.GitCommit,
+			BuildTime:         reformatDate(version.BuildTime),
 			Os:                runtime.GOOS,
 			Arch:              runtime.GOARCH,
 			Experimental:      dockerCli.ClientInfo().HasExperimental,

cli/version/version.go

@@ -1,4 +1,4 @@
-package cli
+package version
 
 // Default build-time variable.
 // These values are overridden via ldflags

cmd/docker/docker.go

@@ -10,6 +10,7 @@ import (
 	"github.com/docker/cli/cli/command"
 	"github.com/docker/cli/cli/command/commands"
 	cliflags "github.com/docker/cli/cli/flags"
+	"github.com/docker/cli/cli/version"
 	"github.com/docker/docker/api/types/versions"
 	"github.com/docker/docker/client"
 	"github.com/sirupsen/logrus"
@@ -41,7 +42,7 @@ func newDockerCommand(dockerCli *command.DockerCli) *cobra.Command {
 			}
 			return isSupported(cmd, dockerCli)
 		},
-		Version:               fmt.Sprintf("%s, build %s", cli.Version, cli.GitCommit),
+		Version:               fmt.Sprintf("%s, build %s", version.Version, version.GitCommit),
 		DisableFlagsInUseLine: true,
 	}
 	opts, flags = cli.SetupRootCommand(cmd)

scripts/build/.variables

@@ -8,15 +8,15 @@ BUILDTIME=${BUILDTIME:-$(date --utc --rfc-3339 ns 2> /dev/null | sed -e 's/ /T/'
 
 PLATFORM_LDFLAGS=
 if test -n "${PLATFORM}"; then
-	PLATFORM_LDFLAGS="-X \"github.com/docker/cli/cli.PlatformName=${PLATFORM}\""
+	PLATFORM_LDFLAGS="-X \"github.com/docker/cli/cli/version.PlatformName=${PLATFORM}\""
 fi
 
 export LDFLAGS="\
     -w \
     ${PLATFORM_LDFLAGS} \
-    -X \"github.com/docker/cli/cli.GitCommit=${GITCOMMIT}\" \
-    -X \"github.com/docker/cli/cli.BuildTime=${BUILDTIME}\" \
-    -X \"github.com/docker/cli/cli.Version=${VERSION}\" \
+    -X \"github.com/docker/cli/cli/version.GitCommit=${GITCOMMIT}\" \
+    -X \"github.com/docker/cli/cli/version.BuildTime=${BUILDTIME}\" \
+    -X \"github.com/docker/cli/cli/version.Version=${VERSION}\" \
     ${LDFLAGS:-} \
 "