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post-receive-email: ensure sent messages are not empty

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Changes the logic in the script to determine whether an email message
will be sent before invoking the send_mail() function; otherwise, if
the logic determines that a message will not be sent, send_mail() will
cause an empty email to be sent. In addition, ensures that if multiple
refs are updated and a message cannot be sent for one of them,
the others are still processed normally.

Signed-off-by: Kevin P. Fleming <kpfleming@digium.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Kevin P. Fleming 2010-09-10 11:09:39 -05:00 committed by Junio C Hamano
parent b03e7b7d76
commit 53cad69105
1 changed files with 31 additions and 16 deletions
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47
contrib/hooks/post-receive-email
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@ -71,19 +71,10 @@
# ---------------------------- Functions
#
# Top level email generation function. This decides what type of update
# this is and calls the appropriate body-generation routine after outputting
# the common header
# Function to prepare for email generation. This decides what type
# of update this is and whether an email should even be generated.
#
# Note this function doesn't actually generate any email output, that is
# taken care of by the functions it calls:
# - generate_email_header
# - generate_create_XXXX_email
# - generate_update_XXXX_email
# - generate_delete_XXXX_email
# - generate_email_footer
#
generate_email()
prep_for_email()
{
# --- Arguments
oldrev=$(git rev-parse $1)
@ -159,7 +150,7 @@ generate_email()
# Anything else (is there anything else?)
echo >&2 "*** Unknown type of update to $refname ($rev_type)"
echo >&2 "*** - no email generated"
exit 1
return 0
;;
esac
@ -175,9 +166,32 @@ generate_email()
esac
echo >&2 "*** $config_name is not set so no email will be sent"
echo >&2 "*** for $refname update $oldrev->$newrev"
exit 0
return 0
fi
return 1
}
#
# Top level email generation function. This calls the appropriate
# body-generation routine after outputting the common header.
#
# Note this function doesn't actually generate any email output, that is
# taken care of by the functions it calls:
# - generate_email_header
# - generate_create_XXXX_email
# - generate_update_XXXX_email
# - generate_delete_XXXX_email
# - generate_email_footer
#
# Note also that this function cannot 'exit' from the script; when this
# function is running (in hook script mode), the send_mail() function
# is already executing in another process, connected via a pipe, and
# if this function exits without, whatever has been generated to that
# point will be sent as an email... even if nothing has been generated.
#
generate_email()
{
# Email parameters
# The email subject will contain the best description of the ref
# that we can build from the parameters
@ -717,10 +731,11 @@ if [ -n "$1" -a -n "$2" -a -n "$3" ]; then
# Output to the terminal in command line mode - if someone wanted to
# resend an email; they could redirect the output to sendmail
# themselves
PAGER= generate_email $2 $3 $1
prep_for_email $2 $3 $1 && PAGER= generate_email
else
while read oldrev newrev refname
do
generate_email $oldrev $newrev $refname $maxlines | send_mail
prep_for_email $oldrev $newrev $refname || continue
generate_email $maxlines | send_mail
done
fi