82 def manifest_name(build_number):  argument
88     return 'manifest_{}.xml'.format(build_number)
91 def package_name(build_number, host):  argument
97     return 'clang-{}-{}-x86.tar.bz2'.format(build_number, host)
100 def download_build(host, build_number, download_dir):  argument
101     filename = package_name(build_number, host)
102     return download_file(host, build_number, filename, download_dir)
105 def download_manifest(host, build_number, download_dir):  argument
106     filename = manifest_name(build_number)
107     return download_file(host, build_number, filename, download_dir)
110 def download_file(host, build_number, pkg_name, download_dir):  argument
116         build_num=build_number)
136 def update_clang(host, build_number, use_current_branch, download_dir, bug):  argument
143             ['repo', 'start', 'update-clang-{}'.format(build_number), '.'])
145     package = download_build(host, build_number, download_dir)
146     manifest = download_manifest(host, build_number, download_dir)
148     install_subdir = 'clang-' + build_number
161         'Update prebuilt Clang to build {}.'.format(build_number),