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""" Helpers to download a recent clang release."""
def _get_platform_folder(os_name):
os_name = os_name.lower()
if os_name.startswith('windows'):
return 'Win'
if os_name.startswith('mac os'):
return 'Mac'
if not os_name.startswith('linux'):
fail('Unknown platform')
return 'Linux_x64'
def _download_chromium_clang(repo_ctx, platform_folder, package_version, sha256,
out_folder):
cds_url = 'https://commondatastorage.googleapis.com/chromium-browser-clang'
cds_file = 'clang-%s.tgz' % package_version
cds_full_url = '{0}/{1}/{2}'.format(cds_url, platform_folder, cds_file)
repo_ctx.download_and_extract(cds_full_url, output=out_folder, sha256=sha256)
def download_clang(repo_ctx, out_folder):
""" Download a fresh clang release and put it into out_folder.
Clang itself will be located in 'out_folder/bin/clang'.
We currently download one of the latest releases of clang by the
Chromium project (see
https://chromium.googlesource.com/chromium/src/+/master/docs/clang.md).
Args:
repo_ctx: An instance of repository_context object.
out_folder: A folder to extract the compiler into.
"""
# TODO(ibiryukov): we currently download and extract some extra tools in the
# clang release (e.g., sanitizers). We should probably remove the ones
# we don't need and document the ones we want provide in addition to clang.
# Latest CLANG_REVISION and CLANG_SUB_REVISION of the Chromiums's release
# can be found in https://chromium.googlesource.com/chromium/src/tools/clang/+/master/scripts/update.py
CLANG_REVISION = '321529'
CLANG_SUB_REVISION = 2
package_version = '%s-%s' % (CLANG_REVISION, CLANG_SUB_REVISION)
checksums = {
'Linux_x64':
'76d4eb1ad011e3127c4a9de9b9f5d4ac624b5a9395c4d7395c9e0a487b13daf6',
'Mac':
'4b2a7a65ac1ee892b318c723eec8771f514bb306f346aa8216bb0006f19d87b7',
'Win':
'eba51bb8f84af41a85903113666bd21c22709010c39c4cb19dc20cf1ed14581b',
}
platform_folder = _get_platform_folder(repo_ctx.os.name)
_download_chromium_clang(repo_ctx, platform_folder, package_version,
checksums[platform_folder], out_folder)
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