Add Artifactory Fetcher to download latest created artifact in artifactory

lib/omnibus.rb

@@ -63,11 +63,12 @@ module Omnibus
   autoload :ThreadPool,       "omnibus/thread_pool"
   autoload :Licensing,        "omnibus/licensing"
 
-  autoload :GitFetcher,  "omnibus/fetchers/git_fetcher"
-  autoload :NetFetcher,  "omnibus/fetchers/net_fetcher"
-  autoload :NullFetcher, "omnibus/fetchers/null_fetcher"
-  autoload :PathFetcher, "omnibus/fetchers/path_fetcher"
-  autoload :FileFetcher, "omnibus/fetchers/file_fetcher"
+  autoload :GitFetcher,         "omnibus/fetchers/git_fetcher"
+  autoload :NetFetcher,         "omnibus/fetchers/net_fetcher"
+  autoload :ArtifactoryFetcher, "omnibus/fetchers/artifactory_fetcher"
+  autoload :NullFetcher,        "omnibus/fetchers/null_fetcher"
+  autoload :PathFetcher,        "omnibus/fetchers/path_fetcher"
+  autoload :FileFetcher,        "omnibus/fetchers/file_fetcher"
 
   autoload :ArtifactoryPublisher, "omnibus/publishers/artifactory_publisher"
   autoload :NullPublisher,        "omnibus/publishers/null_publisher"

lib/omnibus/fetcher.rb

@@ -187,7 +187,9 @@ def self.resolve_version(version, source)
 
     def self.fetcher_class_for_source(source)
       if source
-        if source[:url]
+        if source[:repository]
+          ArtifactoryFetcher
+        elsif source[:url]
           NetFetcher
         elsif source[:git]
           GitFetcher

lib/omnibus/fetchers/artifactory_fetcher.rb

@@ -0,0 +1,93 @@
+#
+# Copyright 2012-2018 Chef Software, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+require "fileutils"
+require "omnibus/download_helpers"
+
+module Omnibus
+  class ArtifactoryFetcher < NetFetcher
+    private
+
+    #
+    # A find_url is required if the search in artifactory is required to find its file name
+    #
+    # @return [String]
+    #
+    def find_source_url
+      require "base64"
+      require("digest")
+      require("artifactory")
+
+      log.info(:info) { "Searching Artifactory for #{source[:path]}/#{source[:filename_pattern]} in #{source[:repository]} " }
+
+      endpoint = source[:endpoint] || ENV["ARTIFACTORY_ENDPOINT"] || nil
+      raise "Artifactory endpoint not configured" if endpoint.nil?
+
+      Artifactory.endpoint = endpoint
+      Artifactory.api_key  = source[:authorization ] if source[:authorization]
+
+      unless source.key?(:authorization)
+        username = ENV["ARTIFACTORY_USERNAME"] || nil
+        password = ENV["ARTIFACTORY_PASSWORD"] || nil
+        error_message = "You have to provide either source[:authorization] or environment variables for artifactory client"
+        raise error_message if username.nil? || password.nil?
+
+        source[:authorization] = "Basic #{Base64.encode64("#{username}:#{password}")}"
+      end
+
+      query = <<~EOM
+        items.find(
+          {
+            "repo": {"$eq":"#{source[:repository]}"},
+            "name": {"$match":"#{source[:filename_pattern]}"},
+            "path": {"$match":"#{source[:path]}"}
+          }
+        ).include("name", "repo", "created", "path", "actual_sha1").sort({"$desc" : ["created"]}).limit(1)
+      EOM
+      result = Artifactory.post("/api/search/aql", query, "Content-Type" => "text/plain")
+      results = result["results"]
+
+      log.debug(:debug) { "Search Result #{result}" }
+
+      raise "Unable to find #{source[:filename_pattern]} in #{source[:repository]}" if results.empty?
+
+      artifact = results[0]
+
+      source[:url] = "#{Artifactory.endpoint}/#{artifact['repo']}/#{artifact['path']}/#{artifact['name']}"
+      source[:sha1] = artifact["actual_sha1"]
+
+      log.info(:info) { "Found Artifact #{source[:url]} #{source[:sha1]}" }
+    end
+
+    #
+    # The path on disk to the downloaded asset. The filename is defined by
+    # +source :cached_name+. If ommited, then it comes from the software's
+    # +source :url+ value or from the artifactory search result for newest
+    # artifact
+    #
+    # @return [String]
+    #
+    def downloaded_file
+      unless source.key?(:url)
+        find_source_url
+      end
+
+      filename = source[:cached_name] if source[:cached_name]
+      filename ||= File.basename(source[:url], "?*")
+      File.join(Config.cache_dir, filename)
+    end
+  end
+end

lib/omnibus/software.rb

@@ -298,7 +298,8 @@ def source(val = NULL)
           :md5, :sha1, :sha256, :sha512, # hash type - common to all fetchers
           :cookie, :warning, :unsafe, :extract, :cached_name, :authorization, # used by net_fetcher
           :options, # used by path_fetcher
-          :submodules # used by git_fetcher
+          :submodules, # used by git_fetcher
+          :repository, :filename_pattern, :endpoint # used by artifactory_fetcher
         ]
         unless extra_keys.empty?
           raise InvalidValue.new(:source,