1 files changed, 94 insertions, 0 deletions
diff --git a/scripts/api/download_job_artifact.rb b/scripts/api/download_job_artifact.rb
new file mode 100755
index 00000000000..8e2207c6fa7
--- /dev/null
+++ b/scripts/api/download_job_artifact.rb
@@ -0,0 +1,94 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require 'rubygems'
+require 'optparse'
+require 'fileutils'
+require 'uri'
+require 'cgi'
+require 'net/http'
+
+class ArtifactFinder
+  DEFAULT_OPTIONS = {
+    project: ENV['CI_PROJECT_ID'],
+    api_token: ENV['GITLAB_BOT_MULTI_PROJECT_PIPELINE_POLLING_TOKEN']
+  }.freeze
+
+  def initialize(options)
+    @project = options.delete(:project)
+    @job_id = options.delete(:job_id)
+    @api_token = options.delete(:api_token)
+    @artifact_path = options.delete(:artifact_path)
+
+    warn "No API token given." unless api_token
+  end
+
+  def execute
+    url = "https://gitlab.com/api/v4/projects/#{CGI.escape(project)}/jobs/#{job_id}/artifacts"
+
+    if artifact_path
+      FileUtils.mkdir_p(File.dirname(artifact_path))
+      url += "/#{artifact_path}"
+    end
+
+    fetch(url)
+  end
+
+  private
+
+  attr_reader :project, :job_id, :api_token, :artifact_path
+
+  def fetch(uri_str, limit = 10)
+    raise 'Too many HTTP redirects' if limit == 0
+
+    uri = URI(uri_str)
+    request = Net::HTTP::Get.new(uri)
+    request['Private-Token'] = api_token if api_token
+
+    Net::HTTP.start(uri.host, uri.port, use_ssl: true) do |http|
+      http.request(request) do |response|
+        case response
+        when Net::HTTPSuccess then
+          File.open(artifact_path || 'artifacts.zip', 'w') do |file|
+            response.read_body(&file.method(:write))
+          end
+        when Net::HTTPRedirection then
+          location = response['location']
+          warn "Redirected (#{limit - 1} redirections remaining)."
+          fetch(location, limit - 1)
+        else
+          raise "Unexpected response: #{response.value}"
+        end
+      end
+    end
+  end
+end
+
+if $0 == __FILE__
+  options = ArtifactFinder::DEFAULT_OPTIONS.dup
+
+  OptionParser.new do |opts|
+    opts.on("-p", "--project PROJECT", String, "Project where to find the job (defaults to $CI_PROJECT_ID)") do |value|
+      options[:project] = value
+    end
+
+    opts.on("-j", "--job-id JOB_ID", String, "A job ID") do |value|
+      options[:job_id] = value
+    end
+
+    opts.on("-a", "--artifact-path ARTIFACT_PATH", String, "A valid artifact path") do |value|
+      options[:artifact_path] = value
+    end
+
+    opts.on("-t", "--api-token API_TOKEN", String, "A value API token with the `read_api` scope") do |value|
+      options[:api_token] = value
+    end
+
+    opts.on("-h", "--help", "Prints this help") do
+      puts opts
+      exit
+    end
+  end.parse!
+
+  ArtifactFinder.new(options).execute
+end