feat: Use YAML for board definitions

Makefile

@@ -3,8 +3,8 @@ CHANNEL=stable
 clean:
 	rm -rf *.img *.model *.manifest
 
-%.model: boards/%.json # sign a model file
-	cat boards/HEAD.json $< boards/FOOT.json | sed "s|TIMESTAMP|$(shell date -Iseconds --utc)|g" | snap sign -k default > $@
+%.model: boards/%.yaml # sign a model file
+	cat definition.yaml $< | python -c "import sys, yaml, json; json.dump(yaml.load(sys.stdin), sys.stdout, indent=2)" | sed "s|TIMESTAMP|$(shell date -Iseconds --utc)|g" | snap sign -k default > $@
 %.img: %.model # build an image
 	sudo ubuntu-image snap -o $@ -c $(CHANNEL) $<
 

boards/FOOT.json

@@ -1,5 +0,0 @@
-  "required-snaps": ["hello", "hello-world", "nextcloud", "lxd"],
-  "authority-id": "7xN2sMCILuFk10e6DxrTrQWprdmV0Vi9",
-  "brand-id": "7xN2sMCILuFk10e6DxrTrQWprdmV0Vi9",
-  "timestamp": "TIMESTAMP"
-}

boards/HEAD.json

@@ -1,4 +0,0 @@
-{
-  "type": "model",
-  "series": "16",
-  "model": "hub",

boards/amd64.json

@@ -1,3 +0,0 @@
-  "architecture": "amd64",
-  "gadget": "joule",
-  "kernel": "joule-linux",

boards/amd64.yaml

@@ -0,0 +1,3 @@
+architecture: amd64
+gadget: joule
+kernel: joule-linux

boards/rpi2.json

@@ -1,3 +0,0 @@
-  "architecture": "armhf",
-  "gadget": "pi2",
-  "kernel": "pi2-kernel",

boards/rpi2.yaml

@@ -0,0 +1,3 @@
+architecture: armhf
+gadget: pi2
+kernel: pi2-kernel

boards/rpi3.json

@@ -1,4 +0,0 @@
-  "architecture": "armhf",
-  "gadget": "pi2",
-  "kernel": "pi3-kernel",
-

boards/rpi3.yaml

@@ -0,0 +1,4 @@
+architecture: armhf
+gadget: pi3
+kernel: pi2-kernel
+

definition.yaml

@@ -0,0 +1,12 @@
+# basic
+type: model
+series: "16"
+model: hub
+# snaps to be preinstalled:
+required-snaps:
+ - nextcloud # just for proof-of-concept
+# authority meta
+authority-id: 7xN2sMCILuFk10e6DxrTrQWprdmV0Vi9
+brand-id: 7xN2sMCILuFk10e6DxrTrQWprdmV0Vi9
+# timestamp gets filled in automatically
+timestamp: TIMESTAMP