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stash: fix show referencing stash index

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In the conversion of 'stash show' to C in dc7bd382b1 ("stash: convert
show to builtin", 2019-02-25), 'git stash show <n>', where n is the
index of a stash got broken, if n is not a file or a valid revision by
itself.

'stash show' accepts any flag 'git diff' accepts for changing the
output format.  Internally we use 'setup_revisions()' to parse these
command line flags.  Currently we pass the whole argv through to
'setup_revisions()', which includes the stash index.

As the stash index is not a valid revision or a file in the working
tree in most cases however, this 'setup_revisions()' call (and thus
the whole command) ends up failing if we use this form of 'git stash
show'.

Instead of passing the whole argv to 'setup_revisions()', only pass
the flags (and the command name) through, while excluding the stash
reference.  The stash reference is parsed (and validated) in
'get_stash_info()' already.

This separate parsing also means that we currently do produce the
correct output if the command succeeds.

Reported-by: Mike Hommey <mh@glandium.org>
Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Thomas Gummerer 2019-06-15 12:26:18 +01:00 committed by Junio C Hamano
parent b697d92f56
commit 63b50c8ffe
2 changed files with 23 additions and 4 deletions
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9
builtin/stash.c
View file

@ -713,11 +713,11 @@ static int git_stash_config(const char *var, const char *value, void *cb)
static int show_stash(int argc, const char **argv, const char *prefix)
{
int i;
int opts = 0;
int ret = 0;
struct stash_info info;
struct rev_info rev;
struct argv_array stash_args = ARGV_ARRAY_INIT;
struct argv_array revision_args = ARGV_ARRAY_INIT;
struct option options[] = {
OPT_END()
};
@ -726,11 +726,12 @@ static int show_stash(int argc, const char **argv, const char *prefix)
git_config(git_diff_ui_config, NULL);
init_revisions(&rev, prefix);
argv_array_push(&revision_args, argv[0]);
for (i = 1; i < argc; i++) {
if (argv[i][0] != '-')
argv_array_push(&stash_args, argv[i]);
else
opts++;
argv_array_push(&revision_args, argv[i]);
}
ret = get_stash_info(&info, stash_args.argc, stash_args.argv);
@ -742,7 +743,7 @@ static int show_stash(int argc, const char **argv, const char *prefix)
* The config settings are applied only if there are not passed
* any options.
*/
if (!opts) {
if (revision_args.argc == 1) {
git_config(git_stash_config, NULL);
if (show_stat)
rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT;
@ -756,7 +757,7 @@ static int show_stash(int argc, const char **argv, const char *prefix)
}
}
argc = setup_revisions(argc, argv, &rev, NULL);
argc = setup_revisions(revision_args.argc, revision_args.argv, &rev, NULL);
if (argc > 1) {
free_stash_info(&info);
usage_with_options(git_stash_show_usage, options);

18
t/t3903-stash.sh
View file

@ -708,6 +708,24 @@ test_expect_success 'invalid ref of the form "n", n >= N' '
git stash drop
'
test_expect_success 'valid ref of the form "n", n < N' '
git stash clear &&
echo bar5 >file &&
echo bar6 >file2 &&
git add file2 &&
git stash &&
git stash show 0 &&
git stash branch tmp 0 &&
git checkout master &&
git stash &&
git stash apply 0 &&
git reset --hard &&
git stash pop 0 &&
git stash &&
git stash drop 0 &&
test_must_fail git stash drop
'
test_expect_success 'branch: do not drop the stash if the branch exists' '
git stash clear &&
echo foo >file &&