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post-receive-email: document command-line mode 

According to the default hooks/post-receive file, the hook is called
with three arguments on stdin:

  <oldrev> <newrev> <refname>

In command-line mode, the arguments come in a different order, because
the email hook instead calls:

  generate_email $2 $3 $1

Add a comment to explain why, based on comments from the mailing list
and the commit message to v1.5.1~9.  Thanks to Andy for the
explanation.

Requested-by: martin f. krafft <madduck@debian.org>
Cc: Andy Parkins <andyparkins@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jonathan Nieder 2010-05-19 14:01:47 -05:00 committed by Junio C Hamano
parent d07ef71575
commit cc24a1d809
1 changed files with 7 additions and 0 deletions
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7
contrib/hooks/post-receive-email
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@ -23,6 +23,13 @@
# possible for the email to be from someone other than the person doing the
# push.
#
# To help with debugging and use on pre-v1.5.1 git servers, this script will
# also obey the interface of hooks/update, taking its arguments on the
# command line. Unfortunately, hooks/update is called once for each ref.
# To avoid firing one email per ref, this script just prints its output to
# the screen when used in this mode. The output can then be redirected if
# wanted.
#
# Config
# ------
# hooks.mailinglist