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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 = "b4160cb94c54f0b31d0ce14694950dac7b6cd83f"
CLANG_SVN_REVISION = "371856"
CLANG_SUB_REVISION = 1
package_version = "%s-%s-%s" % (
CLANG_SVN_REVISION,
CLANG_REVISION[:8],
CLANG_SUB_REVISION,
)
checksums = {
"Linux_x64": "919c19df3ebd7db03b72575b2de5198404357659fc8c85c2d66e679ad4acbafe",
"Mac": "5632c516f3ac5fab3654d0a874688cad6c7f99b96845da27ab12336a14187aa2",
"Win": "235545b33f4d697190032cb538fdcaba227017c95b752ea8af8f29aab8da7479",
}
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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