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Re: [PATCH 2/3] bisect: remove CR characters from revision in replay

From
Carlo Marcelo Arenas Belón <carenas@gmail.com>
Date
May 20, 2020, 17:08 UTC
Message-ID
<20200520170843.GC20332@Carlos-MBP>
In-Reply-To
<xmqqzha2wt7t.fsf@gitster.c.googlers.com>
On Wed, May 20, 2020 at 07:56:22AM -0700, Junio C Hamano wrote:
Show 5 quoted lines
> As we know that "rev" ought to consist of just hexadecimal and
> cannot be split into two at $IFS even if we don't tell "read" that
> "everything at the end of line is 'rev'", can we do
> 
> 	while read git bisect command rev ignored

that works (kind of), but will cause test t6030.66 to fail, with a git segfault nonetheless, because we can't handle anymore a line line:

git bisect start '--term-new' 'term1' '--term-old' 'term2' '32a594a3fdac2d57cf6d02987e30eec68511498c' '88bcdc1839f0ad191ffdd65cae2a2a862d682151'

IMHO it will be probably still cleaner to do `tr -d '\015'`, even if the patch below avoids all current issues from the testsuite.

will follow up with a fix for the segfault, unless someone else beats me to it.

Carlo
-- >8 --
Subject: [PATCH v2] bisect: avoid tailing CR characters from revision in
 replay

6c722cbe5a (bisect: allow CRLF line endings in "git bisect replay" input, 2020-05-07) includes CR as a field separator, but relies on it not being included in the last field, which breaks at least when running under OpenBSD 6.7's sh.

Instead of just assume the CR will get swallowed, read the rest of the line into an otherwise unused variable and ignore it everywhere except on the call for git bisect start, where it matters.

Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
---
 git-bisect.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/git-bisect.sh b/git-bisect.sh
index 71b367a944..08a6ed57dd 100755
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -210,7 +210,7 @@ bisect_replay () {
 	test -r "$file" || die "$(eval_gettext "cannot read \$file for replaying")"
 	git bisect--helper --bisect-reset || exit
 	oIFS="$IFS" IFS="$IFS$(printf '\015')"
-	while read git bisect command rev
+	while read git bisect command rev tail
 	do
 		test "$git $bisect" = "git bisect" || test "$git" = "git-bisect" || continue
 		if test "$git" = "git-bisect"
@@ -223,7 +223,7 @@ bisect_replay () {
 		get_terms
 		case "$command" in
 		start)
-			cmd="bisect_start $rev"
+			cmd="bisect_start $rev $tail"
 			eval "$cmd" ;;
 		"$TERM_GOOD"|"$TERM_BAD"|skip)
 			git bisect--helper --bisect-write "$command" "$rev" "$TERM_GOOD" "$TERM_BAD" || exit;;
-- 
2.27.0.rc0.187.gede8c892b8
Previous: Junio C HamanoNext: Junio C Hamano
Message 6 of 11 in “openbsd: fixes for 2.27.0-RC0”
  1. 0/3 openbsd: fixes for 2.27.0-RC0Carlo Marcelo Arenas Belón, May 20, 2020
  2. 1/3 t4216: avoid unnecessary subshell in test_bloom_filters_not_usedCarlo Marcelo Arenas Belón, May 20, 2020
  3. Junio C HamanoMay 20, 2020
  4. 2/3 bisect: remove CR characters from revision in replayCarlo Marcelo Arenas Belón, May 20, 2020
  5. Junio C HamanoMay 20, 2020
  6. Carlo Marcelo Arenas BelónMay 20, 2020
  7. Junio C HamanoMay 20, 2020
  8. Christopher Warrington (CHRISTOPHER)May 20, 2020
  9. Junio C HamanoMay 20, 2020
  10. 3/3 t5520: avoid alternation in grep's BRE (not POSIX)Carlo Marcelo Arenas Belón, May 20, 2020
  11. Junio C HamanoMay 20, 2020

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