Fix docker context ls for retrocompatibility

It writes each context as an independent object line

Signed-off-by: Ulysses Souza <ulyssessouza@gmail.com>

cli/cmd/context/ls.go

@@ -93,21 +93,33 @@ func runList(cmd *cobra.Command, opts lsOpts) error {
 		return nil
 	}
 
-	if opts.json {
+	view := viewFromContextList(contexts, currentContext)
-		opts.format = formatter.JSON
+
+	if opts.json || opts.format == formatter.JSON {
+		for _, l := range view {
+			outJSON, err := formatter.ToCompressedJSON(l)
+			if err != nil {
+				return err
+			}
+			_, _ = fmt.Fprintln(os.Stdout, outJSON)
+		}
+		return nil
 	}
 
-	view := viewFromContextList(contexts, currentContext)
+	return formatter.Print(view, formatter.PRETTY, os.Stdout,
-	return formatter.Print(view, opts.format, os.Stdout,
 		func(w io.Writer) {
 			for _, c := range view {
+				contextName := c.Name
+				if c.Current {
+					contextName += " *"
+				}
 				_, _ = fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\t%s\n",
-					c.Name,
+					contextName,
 					c.Type,
 					c.Description,
 					c.DockerEndpoint,
 					c.KubernetesEndpoint,
-					c.Orchestrator)
+					c.StackOrchestrator)
 			}
 		},
 		"NAME", "TYPE", "DESCRIPTION", "DOCKER ENDPOINT", "KUBERNETES ENDPOINT", "ORCHESTRATOR")
@@ -132,28 +144,26 @@ func getEndpoint(name string, meta map[string]interface{}) string {
 }
 
 type contextView struct {
-	Name               string
+	Current            bool
-	Type               string
 	Description        string
 	DockerEndpoint     string
 	KubernetesEndpoint string
-	Orchestrator       string
+	Type               string
+	Name               string
+	StackOrchestrator  string
 }
 
 func viewFromContextList(contextList []*store.DockerContext, currentContext string) []contextView {
 	retList := make([]contextView, len(contextList))
 	for i, c := range contextList {
-		contextName := c.Name
-		if c.Name == currentContext {
-			contextName += " *"
-		}
 		retList[i] = contextView{
-			Name:               contextName,
+			Current:            c.Name == currentContext,
-			Type:               c.Type(),
 			Description:        c.Metadata.Description,
 			DockerEndpoint:     getEndpoint("docker", c.Endpoints),
 			KubernetesEndpoint: getEndpoint("kubernetes", c.Endpoints),
-			Orchestrator:       c.Metadata.StackOrchestrator,
+			Name:               c.Name,
+			Type:               c.Type(),
+			StackOrchestrator:  c.Metadata.StackOrchestrator,
 		}
 	}
 	return retList

cli/cmd/ps.go

@@ -112,8 +112,8 @@ func fqdn(container containers.Container) string {
 type containerView struct {
 	ID      string
 	Image   string
-	Command string
 	Status  string
+	Command string
 	Ports   []string
 }
 
@@ -123,8 +123,8 @@ func viewFromContainerList(containerList []containers.Container) []containerView
 		retList[i] = containerView{
 			ID:      c.ID,
 			Image:   c.Image,
-			Command: c.Command,
 			Status:  c.Status,
+			Command: c.Command,
 			Ports:   formatter.PortsToStrings(c.Ports, fqdn(c)),
 		}
 	}

formatter/json.go

@@ -30,3 +30,12 @@ func ToStandardJSON(i interface{}) (string, error) {
 	}
 	return string(b), nil
 }
+
+// ToCompressedJSON return a string with the JSON representation of the interface{}
+func ToCompressedJSON(i interface{}) (string, error) {
+	b, err := json.Marshal(i)
+	if err != nil {
+		return "", err
+	}
+	return string(b), nil
+}

tests/e2e/testdata/ls-out-json.golden

@@ -1,16 +1 @@
-[
+{"Current":true,"Description":"Current DOCKER_HOST based configuration","DockerEndpoint":"unix:///var/run/docker.sock","KubernetesEndpoint":"","Type":"moby","Name":"default","StackOrchestrator":"swarm"}
-    {
-        "Name": "default",
-        "Metadata": {
-            "Description": "Current DOCKER_HOST based configuration",
-            "StackOrchestrator": "swarm",
-            "Type": "moby"
-        },
-        "Endpoints": {
-            "docker": {
-                "Host": "unix:///var/run/docker.sock"
-            },
-            "kubernetes": {}
-        }
-    }
-]

tests/e2e/testdata/ps-out-example-json.golden

@@ -1,30 +1,16 @@
 [
     {
         "ID": "id",
-        "Status": "",
         "Image": "nginx",
+        "Status": "",
         "Command": "",
-        "CPUTime": 0,
+        "Ports": []
-        "CPULimit": 0,
-        "MemoryUsage": 0,
-        "MemoryLimit": 0,
-        "PidsCurrent": 0,
-        "PidsLimit": 0,
-        "Platform": "",
-        "RestartPolicyCondition": ""
     },
     {
         "ID": "1234",
-        "Status": "",
         "Image": "alpine",
+        "Status": "",
         "Command": "",
-        "CPUTime": 0,
+        "Ports": []
-        "CPULimit": 0,
-        "MemoryUsage": 0,
-        "MemoryLimit": 0,
-        "PidsCurrent": 0,
-        "PidsLimit": 0,
-        "Platform": "",
-        "RestartPolicyCondition": ""
     }
 ]