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When examining merge commits in our Git hooks, only check the first parent

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This does two things:

  1. We can properly validate log entries in merge commits.
  2. We don't check commits that were merged in from other branches.

* build-aux/git-hooks/commit-msg-files.awk (get_commit_changes): Get
the changes compared to the first parent.

* build-aux/git-hooks/pre-push: Only get the first parent of merge
commits when returning the rev-list, and only check "master" or
"emacs-NN" branches.
This commit is contained in:
Jim Porter 2023-04-23 11:43:07 -07:00
parent e26dcc0e14
commit 3ce462c8fd
2 changed files with 7 additions and 4 deletions
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2
build-aux/git-hooks/commit-msg-files.awk
View File

@ -33,7 +33,7 @@
function get_commit_changes(commit_sha, changes, cmd, i, j, len, \
bits, filename) {
# Collect all the files touched in the specified commit.
cmd = ("git log -1 --name-status --format= " commit_sha)
cmd = ("git show --name-status --first-parent --format= " commit_sha)
while ((cmd | getline) > 0) {
for (i = 2; i <= NF; i++) {
len = split($i, bits, "/")

9
build-aux/git-hooks/pre-push
View File

@ -39,14 +39,17 @@ else
fi
# Standard input receives lines of the form:
# <local ref> SP <local name> SP <remote ref> SP <remote name> LF
# <local ref> SP <local sha> SP <remote ref> SP <remote sha> LF
$awk -v origin_name="$1" '
# If the local SHA is all zeroes, ignore it.
$2 ~ /^0{40}$/ {
next
}
$2 ~ /^[a-z0-9]{40}$/ {
# Check any lines with a valid local SHA and whose remote ref is
# master or an emacs-NN release branch. (We want to avoid checking
# feature or scratch branches here.)
$2 ~ /^[a-z0-9]{40}$/ && $3 ~ /^refs/heads/(master|emacs-[0-9]+)$/ {
newref = $2
# If the remote SHA is all zeroes, this is a new object to be
# pushed (likely a branch)...
@ -78,6 +81,6 @@ $awk -v origin_name="$1" '
}
# Print every SHA after oldref, up to (and including) newref.
system("git rev-list --reverse " oldref ".." newref)
system("git rev-list --first-parent --reverse " oldref ".." newref)
}
' | $awk -v reason=pre-push -f .git/hooks/commit-msg-files.awk