Re: [GSoC][PATCH v7 21/26] stash: replace spawning `git ls-files` child process

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On 08/08, Paul-Sebastian Ungureanu wrote:
> This commit replaces spawning `git ls-files` child process with
> API calls to get the untracked files.
> ---
>  builtin/stash--helper.c | 49 +++++++++++++++++++++++++++--------------
>  1 file changed, 32 insertions(+), 17 deletions(-)
> 
> diff --git a/builtin/stash--helper.c b/builtin/stash--helper.c
> index 4fd79532c..5c27f5dcf 100644
> --- a/builtin/stash--helper.c
> +++ b/builtin/stash--helper.c
> @@ -813,27 +813,42 @@ static int store_stash(int argc, const char **argv, const char *prefix)
>  /*
>   * `out` will be filled with the names of untracked files. The return value is:
>   *
> - * < 0 if there was a bug (any arg given outside the repo will be detected
> - *     by `setup_revision()`)
>   * = 0 if there are not any untracked files
>   * > 0 if there are untracked files
>   */
> -static int get_untracked_files(const char **argv, int line_term,
> +static int get_untracked_files(const char **argv, const char *prefix,
>  			       int include_untracked, struct strbuf *out)
>  {
> -	struct child_process cp = CHILD_PROCESS_INIT;
> -	cp.git_cmd = 1;
> -	argv_array_pushl(&cp.args, "ls-files", "-o", NULL);
> -	if (line_term)
> -		argv_array_push(&cp.args, "-z");
> +	int max_len;
> +	int i;
> +	char *seen;
> +	struct dir_struct dir;
> +	struct pathspec pathspec;
> +
> +	memset(&dir, 0, sizeof(dir));
>  	if (include_untracked != 2)
> -		argv_array_push(&cp.args, "--exclude-standard");
> -	argv_array_push(&cp.args, "--");
> -	if (argv)
> -		argv_array_pushv(&cp.args, argv);
> +		setup_standard_excludes(&dir);
>  
> -	if (pipe_command(&cp, NULL, 0, out, 0, NULL, 0))
> -		return -1;
> +	parse_pathspec(&pathspec, 0,
> +		       PATHSPEC_PREFER_FULL,
> +		       prefix, argv);
> +	seen = xcalloc(pathspec.nr, 1);
> +
> +	max_len = fill_directory(&dir, the_repository->index, &pathspec);
> +	for (i = 0; i < dir.nr; i++) {
> +		struct dir_entry *ent = dir.entries[i];
> +		if (!dir_path_match(ent, &pathspec, max_len, seen)) {
> +			free(ent);
> +			continue;
> +		}
> +		strbuf_addf(out, "%s\n", ent->name);

As mentioned in my comments about the 'diff-index' replacement, this
'\n' should probably be '\0', and we should keep the '-z' flag in 'git
update-index', in case somebody has a '\n' in their filenames.

While creating such a file is probably not a good idea anyway, we
should still be able to handle it (and have been before this, so we
shouldn't break it).

> +		free(ent);
> +	}
> +
> +	free(dir.entries);
> +	free(dir.ignored);
> +	clear_directory(&dir);
> +	free(seen);
>  	return out->len;
>  }
>  
> @@ -888,7 +903,7 @@ static int check_changes(const char **argv, int include_untracked,
>  		goto done;
>  	}
>  
> -	if (include_untracked && get_untracked_files(argv, 0,
> +	if (include_untracked && get_untracked_files(argv, prefix,
>  						     include_untracked, &out))
>  		ret = 1;
>  
> @@ -908,7 +923,7 @@ static int save_untracked_files(struct stash_info *info, struct strbuf *msg,
>  	struct child_process cp2 = CHILD_PROCESS_INIT;
>  
>  	cp.git_cmd = 1;
> -	argv_array_pushl(&cp.args, "update-index", "-z", "--add",
> +	argv_array_pushl(&cp.args, "update-index", "--add",
>  			 "--remove", "--stdin", NULL);
>  	argv_array_pushf(&cp.env_array, "GIT_INDEX_FILE=%s",
>  			 stash_index_path.buf);
> @@ -1134,7 +1149,7 @@ static int do_create_stash(int argc, const char **argv, const char *prefix,
>  		goto done;
>  	}
>  
> -	if (include_untracked && get_untracked_files(argv, 1,
> +	if (include_untracked && get_untracked_files(argv, prefix,
>  						     include_untracked, &out)) {
>  		if (save_untracked_files(info, &msg, &out)) {
>  			if (!quiet)
> -- 
> 2.18.0.573.g56500d98f
> 



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