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dir: allow a BOM at the beginning of exclude files

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Some text editors like Notepad or LibreOffice write an UTF-8 BOM in
order to indicate that the file is Unicode text rather than whatever the
current locale would indicate.

If someone uses such an editor to edit a gitignore file, we are left
with those three bytes at the beginning of the file. If we do not skip
them, we will attempt to match a filename with the BOM as prefix, which
won't match the files the user is expecting.

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Carlos Martín Nieto 2015-04-16 16:05:12 +02:00 committed by Junio C Hamano
parent fdf96a20ac
commit 245e1c196d
2 changed files with 16 additions and 1 deletions
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8
dir.c
View File

@ -538,6 +538,7 @@ int add_excludes_from_file_to_list(const char *fname,
struct stat st;
int fd, i, lineno = 1;
size_t size = 0;
static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
char *buf, *entry;
fd = open(fname, O_RDONLY);
@ -574,7 +575,12 @@ int add_excludes_from_file_to_list(const char *fname,
}
el->filebuf = buf;
entry = buf;
if (size >= 3 && !memcmp(buf, utf8_bom, 3))
entry = buf + 3;
else
entry = buf;
for (i = 0; i < size; i++) {
if (buf[i] == '\n') {
if (entry != buf + i && entry[0] != '#') {

9
t/t7061-wtstatus-ignore.sh
View File

@ -20,6 +20,15 @@ test_expect_success 'status untracked directory with --ignored' '
test_cmp expected actual
'
test_expect_success 'same with gitignore starting with BOM' '
printf "\357\273\277ignored\n" >.gitignore &&
mkdir -p untracked &&
: >untracked/ignored &&
: >untracked/uncommitted &&
git status --porcelain --ignored >actual &&
test_cmp expected actual
'
cat >expected <<\EOF
?? .gitignore
?? actual