From: Johannes Schindelin <johannes.schindelin@gmx.de>
To: git@vger.kernel.org
Cc: Junio C Hamano <gitster@pobox.com>,
Philip Oakley <philipoakley@iee.org>, Jeff King <peff@peff.net>,
Phillip Wood <phillip.wood@dunelm.org.uk>,
Liam Beguin <liambeguin@gmail.com>
Subject: [PATCH v6 04/10] rebase -i: do not invent onelines when expanding/collapsing SHA-1s
Date: Fri, 14 Jul 2017 16:45:06 +0200 (CEST) [thread overview]
Message-ID: <4a5f540d4dcde47a7ba5e08b990de164cc0c52b2.1500043437.git.johannes.schindelin@gmx.de> (raw)
In-Reply-To: <cover.1500043436.git.johannes.schindelin@gmx.de>
To avoid problems with short SHA-1s that become non-unique during the
rebase, we rewrite the todo script with short/long SHA-1s before and
after letting the user edit the script. Since SHA-1s are not intuitive
for humans, rebase -i also provides the onelines (commit message
subjects) in the script, purely for the user's convenience.
It is very possible to generate a todo script via different means than
rebase -i and then to let rebase -i run with it; In this case, these
onelines are not required.
And this is where the expand/collapse machinery has a bug: it *expects*
that oneline, and failing to find one reuses the previous SHA-1 as
"oneline".
It was most likely an oversight, and made implementation in the (quite
limiting) shell script language less convoluted. However, we are about
to reimplement performance-critical parts in C (and due to spawning a
git.exe process for every single line of the todo script, the
expansion/collapsing of the SHA-1s *is* performance-hampering on
Windows), therefore let's fix this bug to make cross-validation with the
C version of that functionality possible.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
git-rebase--interactive.sh | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index 93372c62b2e..9d65212b7f1 100644
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -760,7 +760,12 @@ transform_todo_ids () {
;;
*)
sha1=$(git rev-parse --verify --quiet "$@" ${rest%%[ ]*}) &&
- rest="$sha1 ${rest#*[ ]}"
+ if test "a$rest" = "a${rest#*[ ]}"
+ then
+ rest=$sha1
+ else
+ rest="$sha1 ${rest#*[ ]}"
+ fi
;;
esac
printf '%s\n' "$command${rest:+ }$rest"
--
2.13.3.windows.1.13.gaf0c2223da0
next prev parent reply other threads:[~2017-07-14 14:45 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-14 14:44 [PATCH v6 00/10] The final building block for a faster rebase -i Johannes Schindelin
2017-07-14 14:44 ` [PATCH v6 01/10] t3415: verify that an empty instructionFormat is handled as before Johannes Schindelin
2017-07-14 14:44 ` [PATCH v6 02/10] rebase -i: generate the script via rebase--helper Johannes Schindelin
2017-07-14 22:50 ` Stefan Beller
2017-07-15 12:56 ` Johannes Schindelin
2017-07-14 14:45 ` [PATCH v6 03/10] rebase -i: remove useless indentation Johannes Schindelin
2017-07-14 14:45 ` Johannes Schindelin [this message]
2017-07-14 14:45 ` [PATCH v6 05/10] rebase -i: also expand/collapse the SHA-1s via the rebase--helper Johannes Schindelin
2017-07-14 14:45 ` [PATCH v6 06/10] t3404: relax rebase.missingCommitsCheck tests Johannes Schindelin
2017-07-14 14:45 ` [PATCH v6 07/10] rebase -i: check for missing commits in the rebase--helper Johannes Schindelin
2017-07-14 14:45 ` [PATCH v6 08/10] rebase -i: skip unnecessary picks using " Johannes Schindelin
2017-07-14 14:45 ` [PATCH v6 09/10] t3415: test fixup with wrapped oneline Johannes Schindelin
2017-07-14 14:45 ` [PATCH v6 10/10] rebase -i: rearrange fixup/squash lines using the rebase--helper Johannes Schindelin
2017-07-14 17:27 ` [PATCH v6 00/10] The final building block for a faster rebase -i Stefan Beller
2017-07-14 20:39 ` Johannes Schindelin
2017-07-20 21:38 ` Junio C Hamano
2017-07-22 11:44 ` Johannes Schindelin
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