From 82f2b3edbc3c1b4d2c93ed4d1e66e6a6242fd1bb Mon Sep 17 00:00:00 2001 From: Ed Santiago Date: Tue, 10 May 2022 05:27:13 -0600 Subject: bloat check: make more robust The use of 'C^' (parent) in 'git rebase' is counterintuitive, at least to me: when C is a merge of multiple commits, rebase picks each of those commits. That probably makes good sense to a git expert, which I'm not. Solution: forget using '^', just calculate the baseline sizes by doing a checkout of the PR's parent. Also: compute PR parent using git-merge-base instead of blindly trusting $DEST_BRANCH (which may be volatile as other PRs are merged). Also: run git-rebase directly, not via make rule. That indirection is too confusing here. Signed-off-by: Ed Santiago --- contrib/cirrus/runner.sh | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) diff --git a/contrib/cirrus/runner.sh b/contrib/cirrus/runner.sh index c4a714691..1ec18c861 100755 --- a/contrib/cirrus/runner.sh +++ b/contrib/cirrus/runner.sh @@ -250,16 +250,23 @@ function _run_altbuild() { case "$ALT_NAME" in *Each*) git fetch origin - # The check-size script, introduced 2022-03-22 in #13518, + # The make-and-check-size script, introduced 2022-03-22 in #13518, # runs 'make' (the original purpose of this check) against # each commit, then checks image sizes to make sure that # none have grown beyond a given limit. That of course - # requires a baseline, which is why we use '^' to start - # with the *parent* commit of this PR, not the first commit. + # requires a baseline, so our first step is to build the + # branch point of the PR. + local context_dir savedhead pr_base context_dir=$(mktemp -d --tmpdir make-size-check.XXXXXXX) - make build-all-new-commits \ - GIT_BASE_BRANCH=origin/"${DEST_BRANCH}^" \ - MAKE="hack/make-and-check-size $context_dir" + savedhead=$(git rev-parse HEAD) + # Push to PR base. First run of the script will write size files + pr_base=$(git merge-base --fork-point origin/$DEST_BRANCH) + git checkout $pr_base + hack/make-and-check-size $context_dir + # pop back to PR, and run incremental makes. Subsequent script + # invocations will compare against original size. + git checkout $savedhead + git rebase $pr_base -x "hack/make-and-check-size $context_dir" rm -rf $context_dir ;; *Windows*) -- cgit v1.2.3-54-g00ecf