Let apps.json be generated by Liquid template

Instead of plugin as tried first.

Turns out github doesn't allow own plugins (unlike gitlab). It is the
simpler and more elegant solution any how.

.gitignore

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

_plugins/AppsJsonGenerator.rb

@@ -1,26 +0,0 @@
-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.json

@@ -0,0 +1,14 @@
+---
+layout: none
+---
+{%- assign apps = site.static_files | where: "name", "metadata.json" -%}
+
+[
+
+{%- include_relative {{ apps.first.path }} -%}
+
+{%- for app in apps offset:1 -%}
+,{%- include_relative {{ app.path }} -%}
+{%- endfor -%}
+
+]