[RFC PATCH v4 05/10] Remove ignored files by default when they are in the way

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

From: Elijah Newren <newren@gmail.com>

Change several commands to remove ignored files by default when they are
in the way.  Since some commands (checkout, merge) take a
--no-overwrite-ignore option to allow the user to configure this, and it
may make sense to add that option to more commands (and in the case of
merge, actually plumb that configuration option through to more of the
backends than just the fast-forwarding special case), add little
comments about where such flags would be used.

Incidentally, this fixes a test failure in t7112.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 builtin/am.c               | 3 +--
 builtin/clone.c            | 3 +--
 builtin/merge.c            | 3 +--
 builtin/reset.c            | 3 +--
 builtin/stash.c            | 3 +--
 merge-ort.c                | 2 +-
 reset.c                    | 3 +--
 sequencer.c                | 3 +--
 t/t7112-reset-submodule.sh | 1 -
 9 files changed, 8 insertions(+), 16 deletions(-)

diff --git a/builtin/am.c b/builtin/am.c
index 3c6efe2a46b..8cb7e72e6c5 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1919,8 +1919,7 @@ static int fast_forward_to(struct tree *head, struct tree *remote, int reset)
 	opts.merge = 1;
 	opts.reset = reset;
 	if (!reset)
-		/* FIXME: Default should be to remove ignored files */
-		opts.preserve_ignored = 1;
+		opts.preserve_ignored = 0; /* FIXME: !overwrite_ignore */
 	opts.fn = twoway_merge;
 	init_tree_desc(&t[0], head->buffer, head->size);
 	init_tree_desc(&t[1], remote->buffer, remote->size);
diff --git a/builtin/clone.c b/builtin/clone.c
index e76c38e4e81..49edb4a2aaa 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -686,8 +686,7 @@ static int checkout(int submodule_progress)
 	opts.update = 1;
 	opts.merge = 1;
 	opts.clone = 1;
-	/* FIXME: Default should be to remove ignored files */
-	opts.preserve_ignored = 1;
+	opts.preserve_ignored = 0;
 	opts.fn = oneway_merge;
 	opts.verbose_update = (option_verbosity >= 0);
 	opts.src_index = &the_index;
diff --git a/builtin/merge.c b/builtin/merge.c
index 55aac869e5a..7f990e36651 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -680,8 +680,7 @@ static int read_tree_trivial(struct object_id *common, struct object_id *head,
 	opts.verbose_update = 1;
 	opts.trivial_merges_only = 1;
 	opts.merge = 1;
-	/* FIXME: Default should be to remove ignored files */
-	opts.preserve_ignored = 1;
+	opts.preserve_ignored = 0; /* FIXME: !overwrite_ignore */
 	trees[nr_trees] = parse_tree_indirect(common);
 	if (!trees[nr_trees++])
 		return -1;
diff --git a/builtin/reset.c b/builtin/reset.c
index 73477239146..9d1391335a1 100644
--- a/builtin/reset.c
+++ b/builtin/reset.c
@@ -66,8 +66,7 @@ static int reset_index(const char *ref, const struct object_id *oid, int reset_t
 	case KEEP:
 	case MERGE:
 		opts.update = 1;
-		/* FIXME: Default should be to remove ignored files */
-		opts.preserve_ignored = 1;
+		opts.preserve_ignored = 0; /* FIXME: !overwrite_ignore */
 		break;
 	case HARD:
 		opts.update = 1;
diff --git a/builtin/stash.c b/builtin/stash.c
index 78492013529..92ad3241270 100644
--- a/builtin/stash.c
+++ b/builtin/stash.c
@@ -258,8 +258,7 @@ static int reset_tree(struct object_id *i_tree, int update, int reset)
 	opts.reset = reset;
 	opts.update = update;
 	if (update && !reset)
-		/* FIXME: Default should be to remove ignored files */
-		opts.preserve_ignored = 1;
+		opts.preserve_ignored = 0; /* FIXME: !overwrite_ignore */
 	opts.fn = oneway_merge;
 
 	if (unpack_trees(nr_trees, t, &opts)) {
diff --git a/merge-ort.c b/merge-ort.c
index e5620bda212..5c443b2b00d 100644
--- a/merge-ort.c
+++ b/merge-ort.c
@@ -4044,7 +4044,7 @@ static int checkout(struct merge_options *opt,
 	unpack_opts.quiet = 0; /* FIXME: sequencer might want quiet? */
 	unpack_opts.verbose_update = (opt->verbosity > 2);
 	unpack_opts.fn = twoway_merge;
-	unpack_opts.preserve_ignored = 0; /* FIXME: !opts->overwrite_ignore*/
+	unpack_opts.preserve_ignored = 0; /* FIXME: !opts->overwrite_ignore */
 	parse_tree(prev);
 	init_tree_desc(&trees[0], prev->buffer, prev->size);
 	parse_tree(next);
diff --git a/reset.c b/reset.c
index cd344f47f13..5f69311b9f4 100644
--- a/reset.c
+++ b/reset.c
@@ -56,8 +56,7 @@ int reset_head(struct repository *r, struct object_id *oid, const char *action,
 	unpack_tree_opts.fn = reset_hard ? oneway_merge : twoway_merge;
 	unpack_tree_opts.update = 1;
 	unpack_tree_opts.merge = 1;
-	/* FIXME: Default should be to remove ignored files */
-	unpack_tree_opts.preserve_ignored = 1;
+	unpack_tree_opts.preserve_ignored = 0; /* FIXME: !overwrite_ignore */
 	init_checkout_metadata(&unpack_tree_opts.meta, switch_to_branch, oid, NULL);
 	if (!detach_head)
 		unpack_tree_opts.reset = 1;
diff --git a/sequencer.c b/sequencer.c
index 669ea15944c..05395db9e01 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -3698,8 +3698,7 @@ static int do_reset(struct repository *r,
 	unpack_tree_opts.fn = oneway_merge;
 	unpack_tree_opts.merge = 1;
 	unpack_tree_opts.update = 1;
-	/* FIXME: Default should be to remove ignored files */
-	unpack_tree_opts.preserve_ignored = 1;
+	unpack_tree_opts.preserve_ignored = 0; /* FIXME: !overwrite_ignore */
 	init_checkout_metadata(&unpack_tree_opts.meta, name, &oid, NULL);
 
 	if (repo_read_index_unmerged(r)) {
diff --git a/t/t7112-reset-submodule.sh b/t/t7112-reset-submodule.sh
index 19830d90365..a3e2413bc33 100755
--- a/t/t7112-reset-submodule.sh
+++ b/t/t7112-reset-submodule.sh
@@ -6,7 +6,6 @@ test_description='reset can handle submodules'
 . "$TEST_DIRECTORY"/lib-submodule-update.sh
 
 KNOWN_FAILURE_DIRECTORY_SUBMODULE_CONFLICTS=1
-KNOWN_FAILURE_SUBMODULE_OVERWRITE_IGNORED_UNTRACKED=1
 
 test_submodule_switch_recursing_with_args "reset --keep"
 
-- 
2.33.0.1404.g83021034c5d