* diff-files
*/
+static int read_directory(const char *path, struct path_list *list)
+{
+ DIR *dir;
+ struct dirent *e;
+
+ if (!(dir = opendir(path)))
+ return error("Could not open directory %s", path);
+
+ while ((e = readdir(dir)))
+ if (strcmp(".", e->d_name) && strcmp("..", e->d_name))
+ path_list_insert(xstrdup(e->d_name), list);
+
+ closedir(dir);
+ return 0;
+}
+
+static int queue_diff(struct diff_options *o,
+ const char *name1, const char *name2)
+{
+ struct stat st;
+ int mode1 = 0, mode2 = 0;
+
+ if (name1) {
+ if (stat(name1, &st))
+ return error("Could not access '%s'", name1);
+ mode1 = st.st_mode;
+ }
+ if (name2) {
+ if (stat(name2, &st))
+ return error("Could not access '%s'", name1);
+ mode2 = st.st_mode;
+ }
+
+ if (mode1 && mode2 && S_ISDIR(mode1) != S_ISDIR(mode2))
+ return error("file/directory conflict: %s, %s", name1, name2);
+
+ if (S_ISDIR(mode1) || S_ISDIR(mode2)) {
+ char buffer1[PATH_MAX], buffer2[PATH_MAX];
+ struct path_list p1 = {NULL, 0, 0, 1}, p2 = {NULL, 0, 0, 1};
+ int len1 = 0, len2 = 0, i1, i2, ret = 0;
+
+ if (name1 && read_directory(name1, &p1))
+ return -1;
+ if (name2 && read_directory(name2, &p2)) {
+ path_list_clear(&p1, 0);
+ return -1;
+ }
+
+ if (name1) {
+ len1 = strlen(name1);
+ if (len1 > 0 && name1[len1 - 1] == '/')
+ len1--;
+ memcpy(buffer1, name1, len1);
+ buffer1[len1++] = '/';
+ }
+
+ if (name2) {
+ len2 = strlen(name2);
+ if (len2 > 0 && name2[len2 - 1] == '/')
+ len2--;
+ memcpy(buffer2, name2, len2);
+ buffer2[len2++] = '/';
+ }
+
+ for (i1 = i2 = 0; !ret && (i1 < p1.nr || i2 < p2.nr); ) {
+ const char *n1, *n2;
+ int comp;
+
+ if (i1 == p1.nr)
+ comp = 1;
+ else if (i2 == p2.nr)
+ comp = -1;
+ else
+ comp = strcmp(p1.items[i1].path,
+ p2.items[i2].path);
+
+ if (comp > 0)
+ n1 = NULL;
+ else {
+ n1 = buffer1;
+ strncpy(buffer1 + len1, p1.items[i1++].path,
+ PATH_MAX - len1);
+ }
+
+ if (comp < 0)
+ n2 = NULL;
+ else {
+ n2 = buffer2;
+ strncpy(buffer2 + len2, p2.items[i2++].path,
+ PATH_MAX - len2);
+ }
+
+ ret = queue_diff(o, n1, n2);
+ }
+ path_list_clear(&p1, 0);
+ path_list_clear(&p2, 0);
+
+ return ret;
+ } else {
+ struct diff_filespec *d1, *d2;
+
+ if (o->reverse_diff) {
+ unsigned tmp;
+ const char *tmp_c;
+ tmp = mode1; mode1 = mode2; mode2 = tmp;
+ tmp_c = name1; name1 = name2; name2 = tmp_c;
+ }
+
+ if (!name1)
+ name1 = "/dev/null";
+ if (!name2)
+ name2 = "/dev/null";
+ d1 = alloc_filespec(name1);
+ d2 = alloc_filespec(name2);
+ fill_filespec(d1, null_sha1, mode1);
+ fill_filespec(d2, null_sha1, mode2);
+
+ diff_queue(&diff_queued_diff, d1, d2);
+ return 0;
+ }
+}
+
+static int is_in_index(const char *path)
+{
+ int len = strlen(path);
+ int pos = cache_name_pos(path, len);
+ char c;
+
+ if (pos < 0)
+ return 0;
+ if (strncmp(active_cache[pos]->name, path, len))
+ return 0;
+ c = active_cache[pos]->name[len];
+ return c == '\0' || c == '/';
+}
+
+static int handle_diff_files_args(struct rev_info *revs,
+ int argc, const char **argv, int *silent)
+{
+ *silent = 0;
+
+ /* revs->max_count == -2 means --no-index */
+ while (1 < argc && argv[1][0] == '-') {
+ if (!strcmp(argv[1], "--base"))
+ revs->max_count = 1;
+ else if (!strcmp(argv[1], "--ours"))
+ revs->max_count = 2;
+ else if (!strcmp(argv[1], "--theirs"))
+ revs->max_count = 3;
+ else if (!strcmp(argv[1], "-n") ||
+ !strcmp(argv[1], "--no-index"))
+ revs->max_count = -2;
+ else if (!strcmp(argv[1], "-q"))
+ *silent = 1;
+ else
+ return error("invalid option: %s", argv[1]);
+ argv++; argc--;
+ }
+
+ if (revs->max_count == -1 && revs->diffopt.nr_paths == 2) {
+ /*
+ * If two files are specified, and at least one is untracked,
+ * default to no-index.
+ */
+ read_cache();
+ if (!is_in_index(revs->diffopt.paths[0]) ||
+ !is_in_index(revs->diffopt.paths[1]))
+ revs->max_count = -2;
+ }
+
+ /*
+ * Make sure there are NO revision (i.e. pending object) parameter,
+ * rev.max_count is reasonable (0 <= n <= 3),
+ * there is no other revision filtering parameters.
+ */
+ if (revs->pending.nr || revs->max_count > 3 ||
+ revs->min_age != -1 || revs->max_age != -1)
+ return error("no revision allowed with diff-files");
+
+ if (revs->max_count == -1 &&
+ (revs->diffopt.output_format & DIFF_FORMAT_PATCH))
+ revs->combine_merges = revs->dense_combined_merges = 1;
+
+ return 0;
+}
+
+int run_diff_files_cmd(struct rev_info *revs, int argc, const char **argv)
+{
+ int silent_on_removed;
+
+ if (handle_diff_files_args(revs, argc, argv, &silent_on_removed))
+ return -1;
+
+ if (revs->max_count == -2) {
+ if (revs->diffopt.nr_paths != 2)
+ return error("need two files/directories with --no-index");
+ queue_diff(&revs->diffopt, revs->diffopt.paths[0],
+ revs->diffopt.paths[1]);
+ diffcore_std(&revs->diffopt);
+ diff_flush(&revs->diffopt);
+ return 0;
+ }
+
++ if (read_cache() < 0) {
++ perror("read_cache");
++ return -1;
++ }
+ return run_diff_files(revs, silent_on_removed);
+}
+
int run_diff_files(struct rev_info *revs, int silent_on_removed)
{
int entries, i;