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builtin-am: reject patches when there's a session in progress

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Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am
would error out if the user gave it mbox(s) on the command-line, but
there was a session in progress.

Since c95b138 (Fix git-am safety checks, 2006-09-15), git-am would
detect if the user attempted to feed it a mbox via stdin, by checking if
stdin is not a tty and there is no resume command given.

Re-implement the above two safety checks.

Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Paul Tan 2015-08-04 21:51:36 +08:00 committed by Junio C Hamano
parent 33388a71d2
commit 8d18550318
1 changed files with 15 additions and 0 deletions
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15
builtin/am.c
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@ -1148,6 +1148,21 @@ int cmd_am(int argc, const char **argv, const char *prefix)
die(_("failed to read the index"));
if (am_in_progress(&state)) {
/*
* Catch user error to feed us patches when there is a session
* in progress:
*
* 1. mbox path(s) are provided on the command-line.
* 2. stdin is not a tty: the user is trying to feed us a patch
* from standard input. This is somewhat unreliable -- stdin
* could be /dev/null for example and the caller did not
* intend to feed us a patch but wanted to continue
* unattended.
*/
if (argc || (resume == RESUME_FALSE && !isatty(0)))
die(_("previous rebase directory %s still exists but mbox given."),
state.dir);
if (resume == RESUME_FALSE)
resume = RESUME_APPLY;