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checkout-index: handle "--no-prefix" option

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We use a custom callback to parse "--prefix", but it does
not handle the "unset" case. As a result, passing
"--no-prefix" will cause a segfault.

We can fix this by switching it to an OPT_STRING, which
makes "--no-prefix" counteract a previous "--prefix". Note
that this assigns NULL, so we bump our default-case
initialization to lower in the main function.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2016-01-31 06:26:16 -05:00 committed by Junio C Hamano
parent 9096ee162b
commit 5ed5f671c4
1 changed files with 6 additions and 12 deletions
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18
builtin/checkout-index.c
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@ -142,14 +142,6 @@ static int option_parse_u(const struct option *opt,
return 0;
}
static int option_parse_prefix(const struct option *opt,
const char *arg, int unset)
{
state.base_dir = arg;
state.base_dir_len = strlen(arg);
return 0;
}
static int option_parse_stage(const struct option *opt,
const char *arg, int unset)
{
@ -191,9 +183,8 @@ int cmd_checkout_index(int argc, const char **argv, const char *prefix)
N_("read list of paths from the standard input")),
OPT_BOOL(0, "temp", &to_tempfile,
N_("write the content to temporary files")),
OPT_CALLBACK(0, "prefix", NULL, N_("string"),
N_("when creating files, prepend <string>"),
option_parse_prefix),
OPT_STRING(0, "prefix", &state.base_dir, N_("string"),
N_("when creating files, prepend <string>")),
OPT_CALLBACK(0, "stage", NULL, NULL,
N_("copy out the files from named stage"),
option_parse_stage),
@ -204,7 +195,6 @@ int cmd_checkout_index(int argc, const char **argv, const char *prefix)
usage_with_options(builtin_checkout_index_usage,
builtin_checkout_index_options);
git_config(git_default_config, NULL);
state.base_dir = "";
prefix_length = prefix ? strlen(prefix) : 0;
if (read_cache() < 0) {
@ -217,6 +207,10 @@ int cmd_checkout_index(int argc, const char **argv, const char *prefix)
state.quiet = quiet;
state.not_new = not_new;
if (!state.base_dir)
state.base_dir = "";
state.base_dir_len = strlen(state.base_dir);
if (state.base_dir_len || to_tempfile) {
/* when --prefix is specified we do not
* want to update cache.