Let apps.json be generated by jekyll

Reading

https://github.com/espruino/BangleApps/issues/1020
https://github.com/espruino/BangleApps/issues/46

My understanding is that the requirement for a splitt apps.json solution
is:

  - work seemlessly with github pages (no manually calling a script)

  - single (or at most a few) apps.json for the browser to load for the
    store so the store page is fast

As the github pages already use jekyll to build the store page this can
be solved by a minimal jekyll plugin. This is a proof of concept of
that. If the concept is accepted in a next step, I will create the
splitt files for mmore that just the two here.

.gitignore

@@ -9,3 +9,4 @@ appdates.csv
 _config.yml
 tests/Layout/bin/tmp.*
 tests/Layout/testresult.bmp
+/apps.json

_plugins/AppsJsonGenerator.rb

@@ -0,0 +1,26 @@
+class AppsJsonPage < Jekyll::Page
+  def initialize(site)
+    @site = site
+    @base = site.source
+    @basename = 'apps'
+    @ext = '.json'
+    @name = 'apps.json'
+    @data = {}
+  end
+end
+
+# Generates the apps.json
+# out of all the /apps/*/metadata.json files
+class Generator < Jekyll::Generator
+  safe true
+
+  def generate(site)
+    metadatas = site.static_files.select { |file| file.name == 'metadata.json' }
+    json = metadatas.map { |file| JSON.load(open(file.path)) }
+    appsjson = AppsJsonPage.new(site)
+    open(appsjson.path, 'wb') do |file|
+      file << JSON.generate(json)
+    end
+    site.pages << appsjson
+  end
+end

apps/gbridge/metadata.json

@@ -0,0 +1,18 @@
+{
+  "id": "gbridge",
+  "name": "Gadgetbridge",
+  "version": "0.25",
+  "description": "(NOT RECOMMENDED) Displays Gadgetbridge notifications from Android. Please use the 'Android' Bangle.js app instead.",
+  "icon": "app.png",
+  "type": "widget",
+  "tags": "tool,system,android,widget",
+  "supports": ["BANGLEJS","BANGLEJS2"],
+  "dependencies": {"notify":"type"},
+  "readme": "README.md",
+  "storage": [
+    {"name":"gbridge.settings.js","url":"settings.js"},
+    {"name":"gbridge.img","url":"app-icon.js","evaluate":true},
+    {"name":"gbridge.wid.js","url":"widget.js"}
+  ],
+  "data": [{"name":"gbridge.json"}]
+}

apps/lcars/metadata.json

@@ -0,0 +1,18 @@
+{
+  "id": "lcars",
+  "name": "LCARS Clock",
+  "shortName":"LCARS",
+  "icon": "lcars.png",
+  "version":"0.07",
+  "readme": "README.md",
+  "supports": ["BANGLEJS2"],
+  "description": "Library Computer Access Retrieval System (LCARS) clock.",
+  "type": "clock",
+  "tags": "clock",
+  "screenshots": [{"url":"screenshot.png"}],
+  "storage": [
+    {"name":"lcars.app.js","url":"lcars.app.js"},
+    {"name":"lcars.img","url":"lcars.icon.js","evaluate":true},
+    {"name":"lcars.settings.js","url":"lcars.settings.js"}
+  ]
+}