Encode the Jaguar config as an asset (#270)

Author: kasperl

cmd/jag/commands/firmware.go

@@ -6,6 +6,7 @@ package commands
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -157,19 +158,46 @@ func BuildFirmwareEnvelope(ctx context.Context, id string, name string, wifiSSID
 		return nil, err
 	}
 
-	// TODO(kasper): Can we generate this in a nicer way?
-	wifiProperties := "{ \"wifi.ssid\": \"" + wifiSSID + "\", \"wifi.password\": \"" + wifiPassword + "\" }"
+	configMap := map[string]interface{}{
+		"id":   id,
+		"name": name,
+	}
+	configJson, err := json.Marshal(configMap)
+	if err != nil {
+		return nil, err
+	}
 
-	if err := runFirmwareTool(ctx, sdk, envelopePath, "container", "install", "-o", envelope.Name(), "jaguar", jaguarSnapshot); err != nil {
+	configJsonFile, err := os.CreateTemp("", "*.json.assets")
+	if err != nil {
 		return nil, err
 	}
-	if err := setFirmwareProperty(ctx, sdk, envelope, "uuid", id); err != nil {
+	defer configJsonFile.Close()
+
+	if err := os.WriteFile(configJsonFile.Name(), configJson, 0666); err != nil {
+		return nil, err
+	}
+
+	assetsFile, err := os.CreateTemp("", "*.assets")
+	if err != nil {
+		return nil, err
+	}
+	defer assetsFile.Close()
+
+	if err := runAssetsTool(ctx, sdk, assetsFile.Name(), "create"); err != nil {
+		return nil, err
+	}
+
+	if err := runAssetsTool(ctx, sdk, assetsFile.Name(), "add", "--ubjson", "config", configJsonFile.Name()); err != nil {
 		return nil, err
 	}
-	if err := setFirmwareProperty(ctx, sdk, envelope, "id", id); err != nil {
+
+	// TODO(kasper): Can we generate this in a nicer way?
+	wifiProperties := "{ \"wifi.ssid\": \"" + wifiSSID + "\", \"wifi.password\": \"" + wifiPassword + "\" }"
+
+	if err := runFirmwareTool(ctx, sdk, envelopePath, "container", "install", "--assets", assetsFile.Name(), "-o", envelope.Name(), "jaguar", jaguarSnapshot); err != nil {
 		return nil, err
 	}
-	if err := setFirmwareProperty(ctx, sdk, envelope, "name", name); err != nil {
+	if err := setFirmwareProperty(ctx, sdk, envelope, "uuid", id); err != nil {
 		return nil, err
 	}
 	if err := setFirmwareProperty(ctx, sdk, envelope, "wifi", wifiProperties); err != nil {

src/jaguar.toit

@@ -2,7 +2,6 @@
 // Use of this source code is governed by an MIT-style license that can be
 // found in the LICENSE file.
 
-import encoding.json
 import http
 import log
 import net
@@ -13,6 +12,10 @@ import esp32
 import uuid
 import monitor
 
+import encoding.json
+import encoding.ubjson
+
+import system.assets
 import system.containers
 import system.firmware
 
@@ -98,23 +101,23 @@ serve arguments:
   if arguments.size >= 1:
     port = int.parse arguments[0]
 
-  image_config := {:}
-  if platform == PLATFORM_FREERTOS:
-    image_config = esp32.image_config or {:}
+  config := {:}
+  assets.decode.get "config" --if_present=: | encoded |
+    catch: config = ubjson.decode encoded
 
   id/uuid.Uuid := uuid.NIL
   if arguments.size >= 2:
     id = uuid.parse arguments[1]
   else:
-    id = image_config.get "id"
+    id = config.get "id"
       --if_absent=: id
       --if_present=: uuid.parse it
 
   name/string := "unknown"
   if arguments.size >= 3:
     name = arguments[2]
   else:
-    name = image_config.get "name" --if_absent=: name
+    name = config.get "name" --if_absent=: name
 
   while true:
     attempts ::= 3