Function run_diff_files

diff-lib.c:109–297

}

void run_diff_files(struct rev_info *revs, unsigned int option)
{
	int entries, i;
	int diff_unmerged_stage = revs->max_count;
	unsigned ce_option = ((option & DIFF_RACY_IS_MODIFIED)
			      ? CE_MATCH_RACY_IS_DIRTY : 0);
	uint64_t start = getnanotime();
	struct index_state *istate = revs->diffopt.repo->index;

	if (revs->diffopt.max_depth_valid)
		die(_("max-depth is not supported for worktree diffs"));

	diff_set_mnemonic_prefix(&revs->diffopt, "i/", "w/");

	refresh_fsmonitor(istate);

	if (diff_unmerged_stage < 0)
		diff_unmerged_stage = 2;
	entries = istate->cache_nr;
	for (i = 0; i < entries; i++) {
		unsigned int oldmode, newmode;
		struct cache_entry *ce = istate->cache[i];
		int changed;
		unsigned dirty_submodule = 0;
		const struct object_id *old_oid, *new_oid;

		if (diff_can_quit_early(&revs->diffopt))
			break;

		/*
		 * NEEDSWORK:
		 * Here we filter with pathspec but the result is further
		 * filtered out when --relative is in effect.  To end-users,
		 * a pathspec element that matched only to paths outside the
		 * current directory is like not matching anything at all;
		 * the handling of ps_matched[] here may become problematic
		 * if/when we add the "--error-unmatch" option to "git diff".
		 */
		if (!ce_path_match(istate, ce, &revs->prune_data, revs->ps_matched))
			continue;

		if (revs->diffopt.prefix &&
		    strncmp(ce->name, revs->diffopt.prefix, revs->diffopt.prefix_length))
			continue;

		if (ce_stage(ce)) {
			struct combine_diff_path *dpath;
			struct diff_filepair *pair;
			unsigned int wt_mode = 0;
			int num_compare_stages = 0;
			struct stat st;

			changed = check_removed(ce, &st);
			if (!changed)
				wt_mode = ce_mode_from_stat(ce, st.st_mode);
			else {
				if (changed < 0) {
					perror(ce->name);