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bootstrap.py: use git rev-list for robustness #87532

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merged 3 commits into from
Aug 5, 2021
Merged

bootstrap.py: use git rev-list for robustness #87532

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1259742
bootstrap.py: remove unused `git log` option
hudson-ayers Jul 27, 2021
5d28520
bootstrap.py: use `git rev-list` for robustness
tlyu Jul 27, 2021
e0d7a59
boostrap.py: only look for merges by bors
tlyu Jul 28, 2021
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9 changes: 5 additions & 4 deletions src/bootstrap/bootstrap.py
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Original file line number Diff line number Diff line change
Expand Up @@ -464,16 +464,17 @@ def download_toolchain(self, stage0=True, rustc_channel=None):
# LLVM more often than necessary.
#
# This git command finds that commit SHA, looking for bors-authored
# merges that modified src/llvm-project.
# commits that modified src/llvm-project or other relevant version
# stamp files.
#
# This works even in a repository that has not yet initialized
# submodules.
top_level = subprocess.check_output([
"git", "rev-parse", "--show-toplevel",
]).decode(sys.getdefaultencoding()).strip()
llvm_sha = subprocess.check_output([
"git", "log", "--author=bors", "--format=%H", "-n1",
"-m", "--first-parent",
"git", "rev-list", "--author=bors@rust-lang.org", "-n1",
"--first-parent", "HEAD",
"--",
"{}/src/llvm-project".format(top_level),
"{}/src/bootstrap/download-ci-llvm-stamp".format(top_level),
Expand Down Expand Up @@ -665,7 +666,7 @@ def maybe_download_ci_toolchain(self):

# Look for a version to compare to based on the current commit.
# Only commits merged by bors will have CI artifacts.
merge_base = ["git", "log", "--author=bors", "--pretty=%H", "-n1"]
merge_base = ["git", "rev-list", "--author=bors@rust-lang.org", "-n1", "HEAD"]
commit = subprocess.check_output(merge_base, universal_newlines=True).strip()

# Warn if there were changes to the compiler or standard library since the ancestor commit.
Expand Down