Subject: Re: [PATCH v2 3/3] builtin/add: error out when passing untracked path with -u

From: Junio C Hamano <[email-masked]>
Date: Fri, 29 Mar 2024 14:43:00 -0700

Ghanshyam Thakkar <[email-masked]> writes:

> When passing untracked path with -u option, it silently succeeds. There
> is no error message and the exit code is zero. This is inconsistent
> with other instances of git commands where the expected argument is a
> known path. In those other instances, we error out when the path is
> not known.
>
> Therefore, fix this by passing a character array to

"Therefore, fix" -> "Fix".

> add_files_to_cache() to collect the pathspec matching information and
> report the error if a pathspec does not match any cache entry. Also add
> a testcase to cover this scenario.
>
> Signed-off-by: Ghanshyam Thakkar <[email-masked]>
> ---
>  builtin/add.c         | 9 ++++++++-
>  t/t2200-add-update.sh | 6 ++++++
>  2 files changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/builtin/add.c b/builtin/add.c
> index ffe5fd8d44..650432bb13 100644
> --- a/builtin/add.c
> +++ b/builtin/add.c
> @@ -370,6 +370,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
>  	int add_new_files;
>  	int require_pathspec;
>  	char *seen = NULL;
> +	char *ps_matched = NULL;
>  	struct lock_file lock_file = LOCK_INIT;
>  
>  	git_config(add_config, NULL);
> @@ -547,15 +548,20 @@ int cmd_add(int argc, const char **argv, const char *prefix)
>  		string_list_clear(&only_match_skip_worktree, 0);
>  	}
>  
> +
>  	begin_odb_transaction();

Unnecessary change.

> +	ps_matched = xcalloc(pathspec.nr, 1);
>  	if (add_renormalize)
>  		exit_status |= renormalize_tracked_files(&pathspec, flags);
>  	else
>  		exit_status |= add_files_to_cache(the_repository, prefix,
> -						  &pathspec, NULL,
> +						  &pathspec, ps_matched,
>  						  include_sparse, flags);
>  
> +	if (take_worktree_changes)
> +		exit_status |= report_path_error(ps_matched, &pathspec);

Hmph, are we sure take_worktree_changes is true only when
add_renormalize is false?

>  	if (add_new_files)
>  		exit_status |= add_files(&dir, flags);

If report_path_error() detected that the pathspec were faulty,
should we still proceed to add new files?  This is NOT a rhetorical
question, as I do not know the answer myself.  I do not even know
offhand what add_files_to_cache() above did when pathspec elements
are not all consumed---if it does not complain and does not refrain
from doing any change to the index, then we should follow suite and
add_files() here, too.

> @@ -568,6 +574,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
>  			       COMMIT_LOCK | SKIP_IF_UNCHANGED))
>  		die(_("unable to write new index file"));
>  
> +	free(ps_matched);
>  	dir_clear(&dir);
>  	clear_pathspec(&pathspec);
>  	return exit_status;
> diff --git a/t/t2200-add-update.sh b/t/t2200-add-update.sh
> index c01492f33f..7cba325f08 100755
> --- a/t/t2200-add-update.sh
> +++ b/t/t2200-add-update.sh
> @@ -65,6 +65,12 @@ test_expect_success 'update did not touch untracked files' '
>  	test_must_be_empty out
>  '
>  
> +test_expect_success 'error out when passing untracked path' '
> +	echo content >baz &&
> +	test_must_fail git add -u baz 2>err &&
> +	test_grep -e "error: pathspec .baz. did not match any file(s) known to git" err
> +'
> +
>  test_expect_success 'cache tree has not been corrupted' '
>  
>  	git ls-files -s |