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am: ignore leading whitespace before patch

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Some web-based email clients prepend whitespace to raw message
transcripts to workaround content-sniffing in some browsers.  Adjust
the patch format detection logic to ignore leading whitespace.

So now you can apply patches from GMail with "git am" in three steps:

 1. choose "show original"
 2. tell the browser to "save as" (for example by pressing Ctrl+S)
 3. run "git am" on the saved file

This fixes a regression introduced by v1.6.4-rc0~15^2~2 (git-am
foreign patch support: autodetect some patch formats, 2009-05-27).
GMail support was first introduced to "git am" by v1.5.4-rc0~274^2
(Make mailsplit and mailinfo strip whitespace from the start of the
input, 2007-11-01).

Signed-off-by: David Barr <davidbarr@google.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
David Barr 2011-08-08 04:49:04 +02:00 committed by Junio C Hamano
parent e7a85be3cf
commit 0e8341f29d
2 changed files with 26 additions and 3 deletions
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11
git-am.sh
View file

@ -196,10 +196,15 @@ check_patch_format () {
return 0
fi
# otherwise, check the first few lines of the first patch to try
# to detect its format
# otherwise, check the first few non-blank lines of the first
# patch to try to detect its format
{
read l1
# Start from first line containing non-whitespace
l1=
while test -z "$l1"
do
read l1
done
read l2
read l3
case "$l1" in

18
t/t4150-am.sh
View file

@ -96,6 +96,13 @@ test_expect_success setup '
echo "X-Fake-Field: Line Three" &&
git format-patch --stdout first | sed -e "1d"
} | append_cr >patch1-crlf.eml &&
{
printf "%255s\\n" ""
echo "X-Fake-Field: Line One" &&
echo "X-Fake-Field: Line Two" &&
echo "X-Fake-Field: Line Three" &&
git format-patch --stdout first | sed -e "1d"
} > patch1-ws.eml &&
sed -n -e "3,\$p" msg >file &&
git add file &&
@ -167,6 +174,17 @@ test_expect_success 'am applies patch e-mail not in a mbox with CRLF' '
test "$(git rev-parse second^)" = "$(git rev-parse HEAD^)"
'
test_expect_success 'am applies patch e-mail with preceding whitespace' '
rm -fr .git/rebase-apply &&
git reset --hard &&
git checkout first &&
git am patch1-ws.eml &&
! test -d .git/rebase-apply &&
git diff --exit-code second &&
test "$(git rev-parse second)" = "$(git rev-parse HEAD)" &&
test "$(git rev-parse second^)" = "$(git rev-parse HEAD^)"
'
test_expect_success 'setup: new author and committer' '
GIT_AUTHOR_NAME="Another Thor" &&
GIT_AUTHOR_EMAIL="a.thor@example.com" &&