Get releases from Docker Hub

update.rb

@@ -5,6 +5,8 @@ require 'json'
 require 'rugged'
 require 'liquid'
 require 'digest'
+require 'net/http'
+require 'uri'
 
 WEBSITE_DIR = ARGV[0]
 CACHE_DIR = ARGV[1]
@@ -101,12 +103,30 @@ def generate_commit_message
   end
 end
 
+def get_releases_from_dockerhub(config)
+  url = "https://hub.docker.com/v2/repositories/#{config['dockerhub']}/tags?page_size=100&page=1"
+  ret = {}
+  loop do
+    data = JSON.parse Net::HTTP.get(URI.parse(url))
+    data['results'].each do |r|
+      next unless good_tag(r['name'], config)
+      tag_proper_name = render_tag(r['name'], config)
+      ret[tag_proper_name] = r['tag_last_pushed'][0..9]
+    end
+    url = data['next']
+    break if url.nil?
+  end
+  ret
+end
+
 def get_releases(product, config, i)
   type = get_update_type(config)
   if type == 'git'
     dir = get_cache_dir('git', product, config)
     fetch_git_releases(dir, config)
     return get_releases_from_git(dir, config)
+  elsif type == 'dockerhub'
+    return get_releases_from_dockerhub(config)
   else
     puts "Not implemented: #{type}"
     return {}
@@ -114,7 +134,7 @@ def get_releases(product, config, i)
 end
 
 def get_update_type(config)
-  for i in ['git', 'oci', 'npm']
+  for i in ['git', 'oci', 'npm', 'dockerhub']
     return i if config[i]
   end
 end