Merge pull request #1123 from vieux/add_before_support

add support for --before in ps

api/handlers.go

@@ -152,8 +152,18 @@ func getContainersJSON(c *context, w http.ResponseWriter, r *http.Request) {
 	}
 
 	// Parse flags.
-	all := boolValue(r, "all")
+	var (
-	limit := intValueOrZero(r, "limit")
+		all    = boolValue(r, "all")
+		limit  = intValueOrZero(r, "limit")
+		before *cluster.Container
+	)
+	if value := r.FormValue("before"); value != "" {
+		before = c.cluster.Container(value)
+		if before == nil {
+			httpError(w, fmt.Sprintf("No such container %s", value), http.StatusNotFound)
+			return
+		}
+	}
 
 	// Parse filters.
 	filters, err := dockerfilters.FromParam(r.Form.Get("filters"))
@@ -184,7 +194,7 @@ func getContainersJSON(c *context, w http.ResponseWriter, r *http.Request) {
 	candidates := []*cluster.Container{}
 	for _, container := range c.cluster.Containers() {
 		// Skip stopped containers unless -a was specified.
-		if !container.Info.State.Running && !all && limit <= 0 {
+		if !container.Info.State.Running && !all && before == nil && limit <= 0 {
 			continue
 		}
 
@@ -232,6 +242,12 @@ func getContainersJSON(c *context, w http.ResponseWriter, r *http.Request) {
 	// Convert cluster.Container back into dockerclient.Container.
 	out := []*dockerclient.Container{}
 	for _, container := range candidates {
+		if before != nil {
+			if container.Id == before.Id {
+				before = nil
+			}
+			continue
+		}
 		// Create a copy of the underlying dockerclient.Container so we can
 		// make changes without messing with cluster.Container.
 		tmp := (*container).Container

test/integration/api/ps.bats

@@ -45,6 +45,23 @@ function teardown() {
 	[[ "${lines[1]}" == *"false"* ]]
 }
 
+@test "docker ps --before" {
+	start_docker_with_busybox 2
+	swarm_manage
+
+	docker_swarm run -d --name c1 busybox echo c1
+	docker_swarm run -d --name c2 busybox echo c2
+
+	run docker_swarm ps --before c1
+	[ "${#lines[@]}" -eq  1 ]
+
+	run docker_swarm ps --before c2
+	[ "${#lines[@]}" -eq  2 ]
+
+	run docker_swarm ps --before c3
+	[ "$status" -eq 1 ]
+}
+
 @test "docker ps --filter" {
 	start_docker_with_busybox 2
 	swarm_manage