dart-sdk/sdk_args.gni
Ryan Macnak 48c2181179 [build] Automatically rebuild sdk_hash when the Git commit changes.
Compare the dependencies of version.cc.

Bug: https://github.com/dart-lang/sdk/issues/42633
Change-Id: I3ad50736fa73cbba2c2a5a582cbf1c76e49c35f8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/153860
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Aprelev <aam@google.com>
2020-07-09 21:12:15 +00:00

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# Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
# for details. All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.
_dart_root = get_path_info(".", "abspath")
declare_args() {
# Absolute path to the .git folder.
#
# This is used in rules that need to refer to `.git/logs/HEAD` to include
# a hash in the version string. By default the folder is `.git`, but we define
# it as an argument so it can be overriden by users of `git-worktree` (See
# Issue #33619).
#
# When using git-worktree, you can add
#
# default_git_folder = "/path/to/main/git/repo/.git/worktrees/name/"
#
# to out/ReleaseX64/args.gn. The path above can be extracted from the `.git`
# file under the git worktree folder.
default_git_folder = "$_dart_root/.git"
# Whether to enable the SDK hash check that will prevent loading a kernel
# into a VM which was built with a different SDK.
verify_sdk_hash = true
}
# The SDK hash to build into VM and kernels.
# The value 0000000000 signifies no hash is set, which will disable the check.
if (verify_sdk_hash) {
sdk_hash = exec_script("$_dart_root/tools/make_version.py",
[ "--format={{GIT_HASH}}" ],
"trim string",
[
"$_dart_root/tools/VERSION",
"$_dart_root/tools/utils.py",
"$default_git_folder/logs/HEAD",
])
} else {
sdk_hash = "0000000000"
}