versioning: plugins report a list of supported versions

Further progress on versioning support (Issue #266).
Bump CNI spec version to 0.3.0

plugins/ipam/dhcp/main.go

@@ -22,6 +22,7 @@ import (
 
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
+	"github.com/containernetworking/cni/pkg/version"
 )
 
 const socketPath = "/run/cni/dhcp.sock"
@@ -30,7 +31,7 @@ func main() {
 	if len(os.Args) > 1 && os.Args[1] == "daemon" {
 		runDaemon()
 	} else {
-		skel.PluginMain(cmdAdd, cmdDel)
+		skel.PluginMain(cmdAdd, cmdDel, version.Legacy)
 	}
 }
 

plugins/ipam/host-local/main.go

@@ -19,10 +19,11 @@ import (
 
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
+	"github.com/containernetworking/cni/pkg/version"
 )
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdDel)
+	skel.PluginMain(cmdAdd, cmdDel, version.Legacy)
 }
 
 func cmdAdd(args *skel.CmdArgs) error {

plugins/main/bridge/bridge.go

@@ -28,6 +28,7 @@ import (
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
 	"github.com/containernetworking/cni/pkg/utils"
+	"github.com/containernetworking/cni/pkg/version"
 	"github.com/vishvananda/netlink"
 )
 
@@ -354,5 +355,5 @@ func cmdDel(args *skel.CmdArgs) error {
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdDel)
+	skel.PluginMain(cmdAdd, cmdDel, version.Legacy)
 }

plugins/main/ipvlan/ipvlan.go

@@ -25,6 +25,7 @@ import (
 	"github.com/containernetworking/cni/pkg/ns"
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
+	"github.com/containernetworking/cni/pkg/version"
 	"github.com/vishvananda/netlink"
 )
 
@@ -171,5 +172,5 @@ func renameLink(curName, newName string) error {
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdDel)
+	skel.PluginMain(cmdAdd, cmdDel, version.Legacy)
 }

plugins/main/loopback/loopback.go

@@ -18,6 +18,7 @@ import (
 	"github.com/containernetworking/cni/pkg/ns"
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
+	"github.com/containernetworking/cni/pkg/version"
 	"github.com/vishvananda/netlink"
 )
 
@@ -67,5 +68,5 @@ func cmdDel(args *skel.CmdArgs) error {
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdDel)
+	skel.PluginMain(cmdAdd, cmdDel, version.Legacy)
 }

plugins/main/macvlan/macvlan.go

@@ -26,6 +26,7 @@ import (
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
 	"github.com/containernetworking/cni/pkg/utils/sysctl"
+	"github.com/containernetworking/cni/pkg/version"
 	"github.com/vishvananda/netlink"
 )
 
@@ -193,5 +194,5 @@ func renameLink(curName, newName string) error {
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdDel)
+	skel.PluginMain(cmdAdd, cmdDel, version.Legacy)
 }

plugins/main/ptp/ptp.go

@@ -30,6 +30,7 @@ import (
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
 	"github.com/containernetworking/cni/pkg/utils"
+	"github.com/containernetworking/cni/pkg/version"
 )
 
 func init() {
@@ -236,5 +237,5 @@ func cmdDel(args *skel.CmdArgs) error {
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdDel)
+	skel.PluginMain(cmdAdd, cmdDel, version.Legacy)
 }

plugins/meta/flannel/flannel.go

@@ -32,6 +32,7 @@ import (
 	"github.com/containernetworking/cni/pkg/invoke"
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
+	"github.com/containernetworking/cni/pkg/version"
 )
 
 const (
@@ -249,5 +250,5 @@ func cmdDel(args *skel.CmdArgs) error {
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdDel)
+	skel.PluginMain(cmdAdd, cmdDel, version.Legacy)
 }

plugins/meta/tuning/tuning.go

@@ -27,6 +27,7 @@ import (
 	"github.com/containernetworking/cni/pkg/ns"
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
+	"github.com/containernetworking/cni/pkg/version"
 )
 
 // TuningConf represents the network tuning configuration.
@@ -78,5 +79,5 @@ func cmdDel(args *skel.CmdArgs) error {
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdDel)
+	skel.PluginMain(cmdAdd, cmdDel, version.Legacy)
 }

plugins/test/noop/main.go

@@ -28,6 +28,7 @@ import (
 	"strings"
 
 	"github.com/containernetworking/cni/pkg/skel"
+	"github.com/containernetworking/cni/pkg/version"
 	"github.com/containernetworking/cni/plugins/test/noop/debug"
 )
 
@@ -71,5 +72,6 @@ func cmdDel(args *skel.CmdArgs) error {
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdDel)
+	skel.PluginMain(cmdAdd, cmdDel,
+		version.PluginSupports("0.-42.0", "0.1.0", "0.2.0", "0.3.0"))
 }