| """ 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, |
| ) |
