git: 414b5c616456 - main - .hooks/pre-commit.d: unbreak EPOCH checker

The branch main has been updated by tcberner:

URL: https://cgit.FreeBSD.org/ports/commit/?id=414b5c61645669a346fc817e0b5852c265b96187

commit 414b5c61645669a346fc817e0b5852c265b96187
Author:     Matthias Andree <mandree@FreeBSD.org>
AuthorDate: 2022-11-27 12:51:51 +0000
Commit:     Tobias C. Berner <tcberner@FreeBSD.org>
CommitDate: 2022-12-18 08:58:17 +0000

    .hooks/pre-commit.d: unbreak EPOCH checker
    
    dns/dnsmasq-devel as of 2.88rc3 contained a comment about PORTEPOCH,
    which I removed in the 2.88rc5. This tripped up the checker because
    it assumed that if git yielded lines containing PORTEPOCH, then it
    must have been PORTEPOCH= or similar lines. Untrue in my case.
    
    It was printing
    [pre-commit] dropped PORTEPOCH  in dns/dnsmasq-devel/Makefile
    
    To solve, only pick out PORTEPOCH diffs that are actual assignments,
    and if the new PORTEPOCH is empty, and the old one is also,
    ignore this condition (previously we would exit 1, which is bogus).
    
    Also, grep without -E should not have \ in front of - or +.
    FreeBSD 13.1 grep is fine, but GNU grep ignores those backslashes
    noisily (and I have prepended it to PATH) and emits warnings.
    
    PR:             268024
---
 .hooks/pre-commit.d/check_portepoch | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.hooks/pre-commit.d/check_portepoch b/.hooks/pre-commit.d/check_portepoch
index 1a59a39b5407..34d93e2efcf4 100755
--- a/.hooks/pre-commit.d/check_portepoch
+++ b/.hooks/pre-commit.d/check_portepoch
@@ -5,9 +5,9 @@
 
 check_epoch() {
 	local makefile="$1"
-	local old_epoch=$(git diff --cached -U0 "${makefile}" | grep '^\-PORTEPOCH' | grep -oE '[0-9]+')
-	local new_epoch=$(git diff --cached -U0 "${makefile}" | grep '^\+PORTEPOCH' | grep -oE '[0-9]+')
-	if [ -z "${new_epoch}" ] ; then
+	local old_epoch=$(git diff --cached -U0 "${makefile}" | grep '^-PORTEPOCH.*=' | grep -oE '[0-9]+')
+	local new_epoch=$(git diff --cached -U0 "${makefile}" | grep '^+PORTEPOCH.*=' | grep -oE '[0-9]+')
+	if [ -z "${new_epoch}" -a -n "${old_epoch}" ] ; then
 		echo "[pre-commit] dropped PORTEPOCH ${old_epoch} in ${makefile}"
 		exit 1
 	fi