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init: handle empty "template" parameter

If a user passes "--template=", then our template parameter
is blank. Unfortunately, copy_templates() assumes it has at
least one character, and does all sorts of bad things like
reading from template[-1] and then proceeding to link all of
'/' into the .git directory.

This patch just checks for that condition in copy_templates
and aborts. As a side effect, this means that --template=
now has the meaning "don't copy any templates."

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2008-07-28 02:02:04 -04:00 committed by Junio C Hamano
parent 1e5f7add98
commit d65d2b2fb4
2 changed files with 28 additions and 0 deletions

@ -127,6 +127,8 @@ static void copy_templates(const char *template_dir)
template_dir = strbuf_detach(&d, NULL);
}
}
if (!template_dir[0])
return;
strcpy(template_path, template_dir);
template_len = strlen(template_path);
if (template_path[template_len-1] != '/') {

@ -141,4 +141,30 @@ test_expect_success 'reinit' '
test_cmp again/empty again/err2
'
test_expect_success 'init with --template' '
mkdir template-source &&
echo content >template-source/file &&
(
mkdir template-custom &&
cd template-custom &&
git init --template=../template-source
) &&
test_cmp template-source/file template-custom/.git/file
'
test_expect_success 'init with --template (blank)' '
(
mkdir template-plain &&
cd template-plain &&
git init
) &&
test -f template-plain/.git/info/exclude &&
(
mkdir template-blank &&
cd template-blank &&
git init --template=
) &&
! test -f template-blank/.git/info/exclude
'
test_done