checkout: remove unused code for deferred removals

With commit 05f6901 (checkout: remove blocking dir when FORCEd,
2015-03-31), the last case was removde that actually queued a deferred
removal. This is now more than five years in the past and nobody
complained, so we can rest quite assured that the deferred removal is
not really needed at all.

Let's remove all related code to simplify the already complicated
checkout logic.

Author: pks-t

src/checkout.c

@@ -44,7 +44,6 @@ enum {
 	CHECKOUT_ACTION__REMOVE_CONFLICT = 16,
 	CHECKOUT_ACTION__UPDATE_CONFLICT = 32,
 	CHECKOUT_ACTION__MAX = 32,
-	CHECKOUT_ACTION__DEFER_REMOVE = 64,
 	CHECKOUT_ACTION__REMOVE_AND_UPDATE =
 		(CHECKOUT_ACTION__UPDATE_BLOB | CHECKOUT_ACTION__REMOVE),
 };
@@ -196,7 +195,7 @@ static bool checkout_is_workdir_modified(
 		}
 
 		if (git_submodule_status(&sm_status, data->repo, wditem->path, GIT_SUBMODULE_IGNORE_UNSPECIFIED) < 0 ||
-			GIT_SUBMODULE_STATUS_IS_WD_DIRTY(sm_status))
+		    GIT_SUBMODULE_STATUS_IS_WD_DIRTY(sm_status))
 			rval = true;
 		else if ((sm_oid = git_submodule_wd_id(sm)) == NULL)
 			rval = false;
@@ -274,9 +273,8 @@ static int checkout_action_common(
 
 		/* if the file is on disk and doesn't match our mode, force update */
 		if (wd &&
-			GIT_PERMS_IS_EXEC(wd->mode) !=
-			GIT_PERMS_IS_EXEC(delta->new_file.mode))
-				*action |= CHECKOUT_ACTION__REMOVE;
+		    GIT_PERMS_IS_EXEC(wd->mode) != GIT_PERMS_IS_EXEC(delta->new_file.mode))
+			*action |= CHECKOUT_ACTION__REMOVE;
 
 		notify = GIT_CHECKOUT_NOTIFY_UPDATED;
 	}
@@ -800,7 +798,7 @@ static int checkout_conflictdata_cmp(const void *a, const void *b)
 	int diff;
 
 	if ((diff = checkout_idxentry_cmp(ca->ancestor, cb->ancestor)) == 0 &&
-		(diff = checkout_idxentry_cmp(ca->ours, cb->theirs)) == 0)
+	    (diff = checkout_idxentry_cmp(ca->ours, cb->theirs)) == 0)
 		diff = checkout_idxentry_cmp(ca->theirs, cb->theirs);
 
 	return diff;
@@ -1179,7 +1177,7 @@ static int checkout_conflicts_mark_directoryfile(
 	/* Find d/f conflicts */
 	git_vector_foreach(&data->update_conflicts, i, conflict) {
 		if ((conflict->ours && conflict->theirs) ||
-			(!conflict->ours && !conflict->theirs))
+		    (!conflict->ours && !conflict->theirs))
 			continue;
 
 		path = conflict->ours ?
@@ -1228,8 +1226,8 @@ static int checkout_get_update_conflicts(
 		return 0;
 
 	if ((error = checkout_conflicts_load(data, workdir, pathspec)) < 0 ||
-		(error = checkout_conflicts_coalesce_renames(data)) < 0 ||
-		(error = checkout_conflicts_mark_directoryfile(data)) < 0)
+	    (error = checkout_conflicts_coalesce_renames(data)) < 0 ||
+	    (error = checkout_conflicts_mark_directoryfile(data)) < 0)
 		goto done;
 
 done:
@@ -1314,11 +1312,11 @@ static int checkout_get_actions(
 		return -1;
 
 	if (data->opts.paths.count > 0 &&
-		git_pathspec__vinit(&pathspec, &data->opts.paths, &pathpool) < 0)
+	    git_pathspec__vinit(&pathspec, &data->opts.paths, &pathpool) < 0)
 		return -1;
 
 	if ((error = git_iterator_current(&wditem, workdir)) < 0 &&
-		error != GIT_ITEROVER)
+	    error != GIT_ITEROVER)
 		goto fail;
 
 	deltas = &data->diff->deltas;
@@ -1357,8 +1355,7 @@ static int checkout_get_actions(
 	counts[CHECKOUT_ACTION__REMOVE] += data->removes.length;
 
 	if (counts[CHECKOUT_ACTION__CONFLICT] > 0 &&
-		(data->strategy & GIT_CHECKOUT_ALLOW_CONFLICTS) == 0)
-	{
+	    (data->strategy & GIT_CHECKOUT_ALLOW_CONFLICTS) == 0) {
 		git_error_set(GIT_ERROR_CHECKOUT, "%"PRIuZ" %s checkout",
 			counts[CHECKOUT_ACTION__CONFLICT],
 			counts[CHECKOUT_ACTION__CONFLICT] == 1 ?
@@ -1369,7 +1366,7 @@ static int checkout_get_actions(
 
 
 	if ((error = checkout_get_remove_conflicts(data, workdir, &pathspec)) < 0 ||
-		(error = checkout_get_update_conflicts(data, workdir, &pathspec)) < 0)
+	    (error = checkout_get_update_conflicts(data, workdir, &pathspec)) < 0)
 		goto fail;
 
 	counts[CHECKOUT_ACTION__REMOVE_CONFLICT] = git_vector_length(&data->remove_conflicts);
@@ -1860,26 +1857,6 @@ static int checkout_remove_the_old(
 	return 0;
 }
 
-static int checkout_deferred_remove(git_repository *repo, const char *path)
-{
-#if 0
-	int error = git_futils_rmdir_r(
-		path, data->opts.target_directory, GIT_RMDIR_EMPTY_PARENTS);
-
-	if (error == GIT_ENOTFOUND) {
-		error = 0;
-		git_error_clear();
-	}
-
-	return error;
-#else
-	GIT_UNUSED(repo);
-	GIT_UNUSED(path);
-	assert(false);
-	return 0;
-#endif
-}
-
 static int checkout_create_the_new(
 	unsigned int *actions,
 	checkout_data *data)
@@ -1889,15 +1866,6 @@ static int checkout_create_the_new(
 	size_t i;
 
 	git_vector_foreach(&data->diff->deltas, i, delta) {
-		if (actions[i] & CHECKOUT_ACTION__DEFER_REMOVE) {
-			/* this had a blocker directory that should only be removed iff
-			 * all of the contents of the directory were safely removed
-			 */
-			if ((error = checkout_deferred_remove(
-					data->repo, delta->old_file.path)) < 0)
-				return error;
-		}
-
 		if (actions[i] & CHECKOUT_ACTION__UPDATE_BLOB && !S_ISLNK(delta->new_file.mode)) {
 			if ((error = checkout_blob(data, &delta->new_file)) < 0)
 				return error;
@@ -1922,20 +1890,10 @@ static int checkout_create_submodules(
 	unsigned int *actions,
 	checkout_data *data)
 {
-	int error = 0;
 	git_diff_delta *delta;
 	size_t i;
 
 	git_vector_foreach(&data->diff->deltas, i, delta) {
-		if (actions[i] & CHECKOUT_ACTION__DEFER_REMOVE) {
-			/* this has a blocker directory that should only be removed iff
-			 * all of the contents of the directory were safely removed
-			 */
-			if ((error = checkout_deferred_remove(
-					data->repo, delta->old_file.path)) < 0)
-				return error;
-		}
-
 		if (actions[i] & CHECKOUT_ACTION__UPDATE_SUBMODULE) {
 			int error = checkout_submodule(data, &delta->new_file);
 			if (error < 0)