From: Junio C Hamano <gitster@pobox.com>
Date: Tue, 13 Nov 2007 07:28:45 GMT
Subject: Re: [PATCH] git-send-email: show all headers when sending mail
Message-ID: <7vbq9ywqmq.fsf@gitster.siamese.dyndns.org>
In-Reply-To: <1194883317-11161-1-git-send-email-ddkilzer@kilzer.net>

"David D. Kilzer" <ddkilzer@kilzer.net> writes:

> +replace_header () {
> +	EXPECTED=expected-show-all-headers &&
> +	ACTUAL=actual-show-all-headers &&
> +	REPLACEMENT=`cat ${ACTUAL} | grep "^$1:"` &&
> +	if [ ! -z "${REPLACEMENT}" ]; then \
> +		cat ${EXPECTED} | sed -e "s/^$1: .*\$/${REPLACEMENT}/" > ${EXPECTED}.$$ && \
> +		mv -f ${EXPECTED}.$$ ${EXPECTED}
> +	fi
> +}

If the actual output did not have an asked-for field,
REPLACEMENT will be empty and the breakage will go unnoticed,
won't it?

It would probably be better to write it this way:

	test_expect_success 'Show all headers' '

		git send-email \
                	--dry-run \
                        --from="Example <from@example.com>" \
                        --to=to@example.com \
                        --cc=cc@example.com \
                        --bcc=bcc@example.com \
                        --in-reply-to="<unique-message-id@example.com>" \
                        --smtp-sever relay.example.com \
                        $patches |
		sed	-e "s/^\(Date:\).*/1 DATE-STRING/" \
                	-e "s/^\(Message-Id:\).*/1 ID-STRING/" \
                        -e "s/^\(X-Mailer:\).*/1 X-MAILER-STRING/" \
			>actual &&
		diff -u expected actual

        '

and prepare the expected output with the varying field already
replaced with the placeholder string.

Oh, by the way, do not cat a single file and pipe it to another
command.  There may still be a few such stupidity in our test
scripts but let's not add even more of them...