devcam: add --publish=false and --mini option to start a lite server with no blobs

Change-Id: Idcde77f72126800d610c632940552f04c396634d

config/dev-server-config.json

@@ -18,6 +18,7 @@
      },
 
       "/blog/": {
+          "enabled": ["_env", "${CAMLI_PUBLISH_ENABLED}"],
           "handler": "publish",
           "handlerArgs": {
               "rootName": "dev-blog-root",
@@ -30,6 +31,7 @@
       },
 
       "/pics/": {
+          "enabled": ["_env", "${CAMLI_PUBLISH_ENABLED}"],
           "handler": "publish",
           "handlerArgs": {
               "rootName": "dev-pics-root",

dev/devcam/server.go

@@ -52,6 +52,8 @@ type serverCmd struct {
 	latency  int
 
 	fullClosure bool
+	mini        bool
+	publish     bool
 
 	openBrowser  bool
 	flickrAPIKey string
@@ -74,6 +76,8 @@ func init() {
 		flags.BoolVar(&cmd.tls, "tls", false, "Use TLS.")
 		flags.BoolVar(&cmd.wipe, "wipe", false, "Wipe the blobs on disk and the indexer.")
 		flags.BoolVar(&cmd.debug, "debug", false, "Enable http debugging.")
+		flags.BoolVar(&cmd.publish, "publish", true, "Enable publish handlers")
+		flags.BoolVar(&cmd.mini, "mini", false, "Enable minimal mode, where all optional features are disabled. (Currently just publishing)")
 
 		flags.BoolVar(&cmd.mongo, "mongo", false, "Use mongodb as the indexer. Excludes -mysql, -postgres, -sqlite.")
 		flags.BoolVar(&cmd.mysql, "mysql", false, "Use mysql as the indexer. Excludes -mongo, -postgres, -sqlite.")
@@ -176,6 +180,8 @@ func (c *serverCmd) setEnvVars() error {
 	setenv("CAMLI_POSTGRES_ENABLED", "false")
 	setenv("CAMLI_SQLITE_ENABLED", "false")
 	setenv("CAMLI_KVINDEX_ENABLED", "false")
+
+	setenv("CAMLI_PUBLISH_ENABLED", strconv.FormatBool(c.publish))
 	switch {
 	case c.mongo:
 		setenv("CAMLI_MONGO_ENABLED", "true")
@@ -333,6 +339,9 @@ func (c *serverCmd) setFullClosure() error {
 }
 
 func (c *serverCmd) RunCommand(args []string) error {
+	if c.mini {
+		c.publish = false
+	}
 	err := c.checkFlags(args)
 	if err != nil {
 		return cmdmain.UsageError(fmt.Sprint(err))

pkg/server/ui.go

@@ -137,6 +137,11 @@ func uiFromConfig(ld blobserver.Loader, conf jsonconfig.Obj) (h http.Handler, er
 		}
 	}
 
+	if os.Getenv("CAMLI_PUBLISH_ENABLED") == "false" {
+		// Hack for dev server, to simplify its config with devcam server --publish=false.
+		pubRoots = nil
+	}
+
 	ui.publishRoots = make(map[string]*PublishHandler)
 	for _, pubRoot := range pubRoots {
 		h, err := ld.GetHandler(pubRoot)