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send-email: avoid incorrect header propagation

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If multiple independent patches are sent with send-email, even if the
"In-Reply-To" and "References" headers are not managed by --thread or
--in-reply-to, their values may be propagated from prior patches to
subsequent patches with no such headers defined.

To mitigate this and potential future issues, make sure all global
patch-specific variables are always either handled by
command-specific code (e.g. threading), or are reset to their default
values for every iteration.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Marvin Häuser <mhaeuser@posteo.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Marvin Häuser
2021-08-30 15:30:01 +00:00
committed by Junio C Hamano
parent 48bf2fa8ba
commit e082113484
2 changed files with 62 additions and 9 deletions
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26
git-send-email.perl
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@ -1608,7 +1608,6 @@ EOF
$in_reply_to = $initial_in_reply_to;
$references = $initial_in_reply_to || '';
$subject = $initial_subject;
$message_num = 0;
# Prepares the email, prompts the user, sends it out
@ -1631,6 +1630,7 @@ sub process_file {
@xh = ();
my $input_format = undef;
my @header = ();
$subject = $initial_subject;
$message = "";
$message_num++;
# First unfold multiline header fields
@ -1837,15 +1837,23 @@ sub process_file {
}
# set up for the next message
if ($thread && $message_was_sent &&
($chain_reply_to || !defined $in_reply_to || length($in_reply_to) == 0 ||
$message_num == 1)) {
$in_reply_to = $message_id;
if (length $references > 0) {
$references .= "\n $message_id";
} else {
$references = "$message_id";
if ($thread) {
if ($message_was_sent &&
($chain_reply_to || !defined $in_reply_to || length($in_reply_to) == 0 ||
$message_num == 1)) {
$in_reply_to = $message_id;
if (length $references > 0) {
$references .= "\n $message_id";
} else {
$references = "$message_id";
}
}
} elsif (!defined $initial_in_reply_to) {
# --thread and --in-reply-to manage the "In-Reply-To" header and by
# extension the "References" header. If these commands are not used, reset
# the header values to their defaults.
$in_reply_to = undef;
$references = '';
}
$message_id = undef;
$num_sent++;