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Re: git rebase -i error message interprets \t in commit message

From
Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Date
Aug 6, 2013, 17:19 UTC
Message-ID
<vpqd2pqka9e.fsf@anie.imag.fr>
In-Reply-To
<87fvum694z.fsf@fencepost.gnu.org>
David Kastrup <dak@gnu.org> writes:
Show 18 quoted lines
>> diff --git a/git-sh-setup.sh b/git-sh-setup.sh
>> index 7a964ad..97258d5 100644
>> --- a/git-sh-setup.sh
>> +++ b/git-sh-setup.sh
>> @@ -53,7 +53,7 @@ die () {
>>  die_with_status () {
>>         status=$1
>>         shift
>> -       echo >&2 "$*"
>> +       printf >&2 "%s\n" "$*"
>>         exit "$status"
>>  }
>>  
>> It does not sound crazy as the shell function "say" right below uses the
>> same printf "%s\n" "$*",
>
> Sounds reasonable, though I don't know off-hand (not having the source
> here) whether using "say" inside of die_with_status 
The definition of say is:
say () {
	if test -z "$GIT_QUIET"
	then
		printf '%s\n' "$*"
	fi
}

I don't think we want to disable die's output even when the caller requested to be quiet. Currently, my patch is:

>From 7962ac8d8f2cbc556f669fd97487f9d70edc4ea1 Mon Sep 17 00:00:00 2001
From: Matthieu Moy <Matthieu.Moy@imag.fr>
Date: Tue, 6 Aug 2013 19:13:03 +0200
Subject: [PATCH] die_with_status: use "printf '%s\n'", not "echo"
At least GNU echo interprets backslashes in its arguments.

This triggered at least one bug: the error message of "rebase -i" was turning \t in commit messages into actual tabulations. There may be others.

Using "printf '%s\n'" instead avoids this bad behavior, and is the form used by the "say" function.

Noticed-by: David Kastrup <dak@gnu.org>
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
---
 git-sh-setup.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/git-sh-setup.sh b/git-sh-setup.sh
index 7a964ad..e15be51 100644
--- a/git-sh-setup.sh
+++ b/git-sh-setup.sh
@@ -53,7 +53,7 @@ die () {
 die_with_status () {
        status=$1
        shift
-       echo >&2 "$*"
+       printf >&2 '%s\n' "$*"
        exit "$status"
 }
 
-- 
1.8.3.3.797.gb72c616

I'll resend properly for inclusion if no one objects.

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/
Previous: David KastrupNext: David Kastrup
Message 6 of 14 in “git rebase -i error message interprets \t in commit message”
  1. David KastrupAug 6, 2013
  2. Ramkumar RamachandraAug 6, 2013
  3. Junio C HamanoAug 6, 2013
  4. Matthieu MoyAug 6, 2013
  5. David KastrupAug 6, 2013
  6. Matthieu MoyAug 6, 2013
  7. David KastrupAug 6, 2013
  8. Junio C HamanoAug 6, 2013
  9. Junio C HamanoAug 6, 2013
  10. die_with_status: use "printf '%s\n'", not "echo"Matthieu Moy, Aug 6, 2013
  11. Thomas RastAug 7, 2013
  12. Matthieu MoyAug 7, 2013
  13. die_with_status: use "printf '%s\n'", not "echo"Matthieu Moy, Aug 7, 2013
  14. Thomas RastAug 7, 2013

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