mirror of
https://github.com/dart-lang/sdk
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c1fe610b9d
Bug: R=athom@google.com Change-Id: I42f7b93d192f3be15eabbb5b9b769fe7ab1d1376 Reviewed-on: https://dart-review.googlesource.com/30480 Reviewed-by: Alexander Thomas <athom@google.com> Commit-Queue: Alexander Thomas <athom@google.com> |
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This directory contains the hashes of tar.gz files uploaded to cloud storage. Hooks in the DEPS files run "download_from_google_storage" to download these tarfiles, and unpack them. These tar files contain a stable Dart SDK, which is used to build the observatory and to run the test scripts. The hooks use the --auto-platform feature, so that only the SDK for the current platform (linux, macos, or windows) is downloaded. This requires the subdirectories to have the special names "linux", "win", and "mac", which the download script is hardcoded to recognize. The linux SDK has two extra dart executables added to the bin directory. 'dart-arm' and 'dart-arm64' are executables compiled to run on arm and arm64 (aarch64) processors, respectively. We are currently using the 32-bit ia32 build as the default on linux, windows, and macos. If we switch to the 64-bit build on linux, the snapshots will no longer be portable to arm and arm64, and we will need to upload complete SDKs for each processor architecture. To upload new versions of these tar files, use the "upload_to_google_storage" tool in depot_tools, and download the new stable SDKs from the dartlang.org web page. The arm executables must be copied from the machines that build them, and stripped. Because these SDKs are used for the presubmit dartfmt check on changed files, they may need to be updated often when dartfmt is changing rapidly.