diff-no-index.c

/*
 * "diff --no-index" support
 * Copyright (c) 2007 by Johannes Schindelin
 * Copyright (c) 2008 by Junio C Hamano
 */

#include "cache.h"
#include "color.h"
#include "commit.h"
#include "blob.h"
#include "tag.h"
#include "diff.h"
#include "diffcore.h"
#include "revision.h"
#include "log-tree.h"
#include "builtin.h"
#include "string-list.h"
#include "dir.h"

static int read_directory_contents(const char *path, struct string_list *list)
{
	DIR *dir;
	struct dirent *e;

	if (!(dir = opendir(path)))
		return error("Could not open directory %s", path);

	while ((e = readdir(dir)))
		if (!is_dot_or_dotdot(e->d_name))
			string_list_insert(list, e->d_name);

	closedir(dir);
	return 0;
}

/*
 * This should be "(standard input)" or something, but it will
 * probably expose many more breakages in the way no-index code
 * is bolted onto the diff callchain.
 */
static const char file_from_standard_input[] = "-";

static int get_mode(const char *path, int *mode)
{
	struct stat st;

	if (!path || !strcmp(path, "/dev/null"))
		*mode = 0;
#ifdef GIT_WINDOWS_NATIVE
	else if (!strcasecmp(path, "nul"))
		*mode = 0;
#endif
	else if (path == file_from_standard_input)
		*mode = create_ce_mode(0666);
	else if (lstat(path, &st))
		return error("Could not access '%s'", path);
	else
		*mode = st.st_mode;
	return 0;
}

static int populate_from_stdin(struct diff_filespec *s)
{
	struct strbuf buf = STRBUF_INIT;
	size_t size = 0;

	if (strbuf_read(&buf, 0, 0) < 0)
		return error("error while reading from stdin %s",
				     strerror(errno));