dart-sdk/tools/buildtools/README.md
Zach Anderson 031e77eea1 [infra] Update Clang toolchain and GN
We no longer rely on Fuchsia's buildtools, instead we directly fetch
Clang and GN packages from CIPD using gclient support.

Change-Id: I8995d89babf9c3c6b30214a1133e7b0a1cb9a796
Reviewed-on: https://dart-review.googlesource.com/c/85416
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Zach Anderson <zra@google.com>
2018-11-29 15:37:40 +00:00

735 B

To build Dart for Mac and Linux, we pull Fuchsia's buildtools, which is also used by Flutter. Fuchsia's buildtools includes gn, and the clang toolchain. Fuchsia buildtools vends clang-format as part of the clang toolchain. Since Fuchsia's buildtools doesn't vend a clang toolchain for Windows, we can't get a Windows clang-format binary from it. Therefore, from Chromium's buildtools here:

https://chromium.googlesource.com/chromium/buildtools

we copy the hash file for its Windows clang-format binary, and pull it down from google storage in the update.py script in this directory.

To update to a newer Windows clang-format binary, simply overwrite the hash in clang-format.exe.sha1 with a newer one, and then do a 'gclient sync'.