Implement config export

cmd/control/cli.go

@@ -0,0 +1,66 @@
+package control
+
+import (
+	"os"
+
+	"github.com/codegangsta/cli"
+	"github.com/rancherio/os/config"
+)
+
+func Main() {
+	app := cli.NewApp()
+
+	app.Name = os.Args[0]
+	app.Usage = "Control and configure RancherOS"
+	app.Version = config.VERSION
+	app.Author = "Rancher Labs, Inc."
+	app.Email = "darren@rancher.com"
+
+	app.Commands = []cli.Command{
+		{
+			Name:        "config",
+			ShortName:   "c",
+			Usage:       "configure settings",
+			Subcommands: configSubcommands(),
+		},
+		{
+			Name:      "module",
+			ShortName: "m",
+			Usage:     "module settings",
+			Subcommands: []cli.Command{
+				{
+					Name:  "activate",
+					Usage: "turn on a module and possibly reboot",
+				},
+				{
+					Name:  "deactivate",
+					Usage: "turn off a module and possibly reboot",
+				},
+				{
+					Name:  "list",
+					Usage: "list modules and state",
+				},
+			},
+		},
+		{
+			Name:  "os",
+			Usage: "operating system upgrade/downgrade",
+			Subcommands: []cli.Command{
+				{
+					Name:  "list",
+					Usage: "list available RancherOS versions and state",
+				},
+				{
+					Name:  "update",
+					Usage: "download the latest new version of RancherOS",
+				},
+				{
+					Name:  "activate",
+					Usage: "switch to a new version of RancherOS and reboot",
+				},
+			},
+		},
+	}
+
+	app.Run(os.Args)
+}

cmd/control/config.go

@@ -0,0 +1,71 @@
+package control
+
+import (
+	"fmt"
+	"io/ioutil"
+
+	log "github.com/Sirupsen/logrus"
+
+	"github.com/codegangsta/cli"
+	"github.com/rancherio/os/config"
+	"github.com/rancherio/os/docker"
+)
+
+func configSubcommands() []cli.Command {
+	return []cli.Command{
+		{
+			Name:  "get",
+			Usage: "get value",
+		},
+		{
+			Name:  "import",
+			Usage: "list values",
+		},
+		{
+			Name:  "export",
+			Usage: "dump full configuration",
+			Flags: []cli.Flag{
+				cli.StringFlag{
+					Name:  "output, o",
+					Usage: "File to which to save",
+				},
+				cli.BoolFlag{
+					Name:  "full",
+					Usage: "Include full configuration, not just writable fields",
+				},
+			},
+			Action: configSave,
+		},
+	}
+}
+
+func configSave(c *cli.Context) {
+	cfg, err := config.LoadConfig()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for _, c := range cfg.SystemContainers {
+		container := docker.NewContainer("", &c)
+		if container.Err != nil {
+			log.Fatalf("Failed to parse [%s] : %v", c.Cmd, container.Err)
+		}
+	}
+
+	if !c.Bool("full") {
+		cfg.ClearReadOnly()
+	}
+
+	content, err := cfg.Dump()
+
+	output := c.String("output")
+	if output == "" {
+		fmt.Println(content)
+	} else {
+		err := ioutil.WriteFile(output, []byte(content), 0400)
+		if err != nil {
+			log.Fatal(err)
+		}
+	}
+
+}