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From: Elijah Newren <newren@gmail.com>
To: gitster@pobox.com
Cc: git@vger.kernel.org, sbeller@google.com,
	Elijah Newren <newren@gmail.com>
Subject: [PATCH v8 25/29] merge-recursive: fix overwriting dirty files involved in renames
Date: Wed, 14 Feb 2018 10:52:02 -0800	[thread overview]
Message-ID: <20180214185206.15492-26-newren@gmail.com> (raw)
In-Reply-To: <20180214185206.15492-1-newren@gmail.com>

This fixes an issue that existed before my directory rename detection
patches that affects both normal renames and renames implied by
directory rename detection.  Additional codepaths that only affect
overwriting of dirty files that are involved in directory rename
detection will be added in a subsequent commit.

Reviewed-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Elijah Newren <newren@gmail.com>
---
 merge-recursive.c                   | 85 ++++++++++++++++++++++++++++---------
 merge-recursive.h                   |  2 +
 t/t3501-revert-cherry-pick.sh       |  2 +-
 t/t6043-merge-rename-directories.sh |  2 +-
 t/t7607-merge-overwrite.sh          |  2 +-
 unpack-trees.c                      |  4 +-
 unpack-trees.h                      |  4 ++
 7 files changed, 77 insertions(+), 24 deletions(-)

diff --git a/merge-recursive.c b/merge-recursive.c
index cd91eef805..4532b982a4 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -337,32 +337,37 @@ static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree)
 	init_tree_desc(desc, tree->buffer, tree->size);
 }
 
-static int git_merge_trees(int index_only,
+static int git_merge_trees(struct merge_options *o,
 			   struct tree *common,
 			   struct tree *head,
 			   struct tree *merge)
 {
 	int rc;
 	struct tree_desc t[3];
-	struct unpack_trees_options opts;
 
-	memset(&opts, 0, sizeof(opts));
-	if (index_only)
-		opts.index_only = 1;
+	memset(&o->unpack_opts, 0, sizeof(o->unpack_opts));
+	if (o->call_depth)
+		o->unpack_opts.index_only = 1;
 	else
-		opts.update = 1;
-	opts.merge = 1;
-	opts.head_idx = 2;
-	opts.fn = threeway_merge;
-	opts.src_index = &the_index;
-	opts.dst_index = &the_index;
-	setup_unpack_trees_porcelain(&opts, "merge");
+		o->unpack_opts.update = 1;
+	o->unpack_opts.merge = 1;
+	o->unpack_opts.head_idx = 2;
+	o->unpack_opts.fn = threeway_merge;
+	o->unpack_opts.src_index = &the_index;
+	o->unpack_opts.dst_index = &the_index;
+	setup_unpack_trees_porcelain(&o->unpack_opts, "merge");
 
 	init_tree_desc_from_tree(t+0, common);
 	init_tree_desc_from_tree(t+1, head);
 	init_tree_desc_from_tree(t+2, merge);
 
-	rc = unpack_trees(3, t, &opts);
+	rc = unpack_trees(3, t, &o->unpack_opts);
+	/*
+	 * unpack_trees NULLifies src_index, but it's used in verify_uptodate,
+	 * so set to the new index which will usually have modification
+	 * timestamp info copied over.
+	 */
+	o->unpack_opts.src_index = &the_index;
 	cache_tree_free(&active_cache_tree);
 	return rc;
 }
@@ -795,6 +800,20 @@ static int would_lose_untracked(const char *path)
 	return !was_tracked(path) && file_exists(path);
 }
 
+static int was_dirty(struct merge_options *o, const char *path)
+{
+	struct cache_entry *ce;
+	int dirty = 1;
+
+	if (o->call_depth || !was_tracked(path))
+		return !dirty;
+
+	ce = cache_file_exists(path, strlen(path), ignore_case);
+	dirty = (ce->ce_stat_data.sd_mtime.sec > 0 &&
+		 verify_uptodate(ce, &o->unpack_opts) != 0);
+	return dirty;
+}
+
 static int make_room_for_path(struct merge_options *o, const char *path)
 {
 	int status, i;
@@ -2686,6 +2705,7 @@ static int handle_modify_delete(struct merge_options *o,
 
 static int merge_content(struct merge_options *o,
 			 const char *path,
+			 int file_in_way,
 			 struct object_id *o_oid, int o_mode,
 			 struct object_id *a_oid, int a_mode,
 			 struct object_id *b_oid, int b_mode,
@@ -2760,7 +2780,7 @@ static int merge_content(struct merge_options *o,
 				return -1;
 	}
 
-	if (df_conflict_remains) {
+	if (df_conflict_remains || file_in_way) {
 		char *new_path;
 		if (o->call_depth) {
 			remove_file_from_cache(path);
@@ -2794,6 +2814,30 @@ static int merge_content(struct merge_options *o,
 	return mfi.clean;
 }
 
+static int conflict_rename_normal(struct merge_options *o,
+				  const char *path,
+				  struct object_id *o_oid, unsigned int o_mode,
+				  struct object_id *a_oid, unsigned int a_mode,
+				  struct object_id *b_oid, unsigned int b_mode,
+				  struct rename_conflict_info *ci)
+{
+	int clean_merge;
+	int file_in_the_way = 0;
+
+	if (was_dirty(o, path)) {
+		file_in_the_way = 1;
+		output(o, 1, _("Refusing to lose dirty file at %s"), path);
+	}
+
+	/* Merge the content and write it out */
+	clean_merge = merge_content(o, path, file_in_the_way,
+				    o_oid, o_mode, a_oid, a_mode, b_oid, b_mode,
+				    ci);
+	if (clean_merge > 0 && file_in_the_way)
+		clean_merge = 0;
+	return clean_merge;
+}
+
 /* Per entry merge function */
 static int process_entry(struct merge_options *o,
 			 const char *path, struct stage_data *entry)
@@ -2813,9 +2857,12 @@ static int process_entry(struct merge_options *o,
 		switch (conflict_info->rename_type) {
 		case RENAME_NORMAL:
 		case RENAME_ONE_FILE_TO_ONE:
-			clean_merge = merge_content(o, path,
-						    o_oid, o_mode, a_oid, a_mode, b_oid, b_mode,
-						    conflict_info);
+			clean_merge = conflict_rename_normal(o,
+							     path,
+							     o_oid, o_mode,
+							     a_oid, a_mode,
+							     b_oid, b_mode,
+							     conflict_info);
 			break;
 		case RENAME_DIR:
 			clean_merge = 1;
@@ -2911,7 +2958,7 @@ static int process_entry(struct merge_options *o,
 	} else if (a_oid && b_oid) {
 		/* Case C: Added in both (check for same permissions) and */
 		/* case D: Modified in both, but differently. */
-		clean_merge = merge_content(o, path,
+		clean_merge = merge_content(o, path, 0 /* file_in_way */,
 					    o_oid, o_mode, a_oid, a_mode, b_oid, b_mode,
 					    NULL);
 	} else if (!o_oid && !a_oid && !b_oid) {
@@ -2952,7 +2999,7 @@ int merge_trees(struct merge_options *o,
 		return 1;
 	}
 
-	code = git_merge_trees(o->call_depth, common, head, merge);
+	code = git_merge_trees(o, common, head, merge);
 
 	if (code != 0) {
 		if (show(o, 4) || o->call_depth)
diff --git a/merge-recursive.h b/merge-recursive.h
index 50a4e6af4e..d863cf8867 100644
--- a/merge-recursive.h
+++ b/merge-recursive.h
@@ -1,6 +1,7 @@
 #ifndef MERGE_RECURSIVE_H
 #define MERGE_RECURSIVE_H
 
+#include "unpack-trees.h"
 #include "string-list.h"
 
 struct merge_options {
@@ -27,6 +28,7 @@ struct merge_options {
 	struct strbuf obuf;
 	struct hashmap current_file_dir_set;
 	struct string_list df_conflict_file_set;
+	struct unpack_trees_options unpack_opts;
 };
 
 /*
diff --git a/t/t3501-revert-cherry-pick.sh b/t/t3501-revert-cherry-pick.sh
index 783bdbf59d..0d89f6d0f6 100755
--- a/t/t3501-revert-cherry-pick.sh
+++ b/t/t3501-revert-cherry-pick.sh
@@ -141,7 +141,7 @@ test_expect_success 'cherry-pick "-" works with arguments' '
 	test_cmp expect actual
 '
 
-test_expect_failure 'cherry-pick works with dirty renamed file' '
+test_expect_success 'cherry-pick works with dirty renamed file' '
 	test_commit to-rename &&
 	git checkout -b unrelated &&
 	test_commit unrelated &&
diff --git a/t/t6043-merge-rename-directories.sh b/t/t6043-merge-rename-directories.sh
index 0b60eb8053..b94ba066fe 100755
--- a/t/t6043-merge-rename-directories.sh
+++ b/t/t6043-merge-rename-directories.sh
@@ -3298,7 +3298,7 @@ test_expect_success '11a-setup: Avoid losing dirty contents with simple rename'
 	)
 '
 
-test_expect_failure '11a-check: Avoid losing dirty contents with simple rename' '
+test_expect_success '11a-check: Avoid losing dirty contents with simple rename' '
 	(
 		cd 11a &&
 
diff --git a/t/t7607-merge-overwrite.sh b/t/t7607-merge-overwrite.sh
index 9c422bcd7c..dd8ab7ede1 100755
--- a/t/t7607-merge-overwrite.sh
+++ b/t/t7607-merge-overwrite.sh
@@ -92,7 +92,7 @@ test_expect_success 'will not overwrite removed file with staged changes' '
 	test_cmp important c1.c
 '
 
-test_expect_failure 'will not overwrite unstaged changes in renamed file' '
+test_expect_success 'will not overwrite unstaged changes in renamed file' '
 	git reset --hard c1 &&
 	git mv c1.c other.c &&
 	git commit -m rename &&
diff --git a/unpack-trees.c b/unpack-trees.c
index e6a15bbe44..30d762bd71 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -1508,8 +1508,8 @@ static int verify_uptodate_1(const struct cache_entry *ce,
 		add_rejected_path(o, error_type, ce->name);
 }
 
-static int verify_uptodate(const struct cache_entry *ce,
-			   struct unpack_trees_options *o)
+int verify_uptodate(const struct cache_entry *ce,
+		    struct unpack_trees_options *o)
 {
 	if (!o->skip_sparse_checkout && (ce->ce_flags & CE_NEW_SKIP_WORKTREE))
 		return 0;
diff --git a/unpack-trees.h b/unpack-trees.h
index 6c48117b84..41178ada94 100644
--- a/unpack-trees.h
+++ b/unpack-trees.h
@@ -1,6 +1,7 @@
 #ifndef UNPACK_TREES_H
 #define UNPACK_TREES_H
 
+#include "tree-walk.h"
 #include "string-list.h"
 
 #define MAX_UNPACK_TREES 8
@@ -78,6 +79,9 @@ struct unpack_trees_options {
 extern int unpack_trees(unsigned n, struct tree_desc *t,
 		struct unpack_trees_options *options);
 
+int verify_uptodate(const struct cache_entry *ce,
+		    struct unpack_trees_options *o);
+
 int threeway_merge(const struct cache_entry * const *stages,
 		   struct unpack_trees_options *o);
 int twoway_merge(const struct cache_entry * const *src,
-- 
2.16.1.232.g28d5be9217


  parent reply	other threads:[~2018-02-14 18:54 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-14 18:51 [PATCH v8 00/29] Add directory rename detection to git Elijah Newren
2018-02-14 18:51 ` [PATCH v8 01/29] directory rename detection: basic testcases Elijah Newren
2018-02-14 18:51 ` [PATCH v8 02/29] directory rename detection: directory splitting testcases Elijah Newren
2018-02-14 18:51 ` [PATCH v8 03/29] directory rename detection: testcases to avoid taking detection too far Elijah Newren
2018-02-14 18:51 ` [PATCH v8 04/29] directory rename detection: partially renamed directory testcase/discussion Elijah Newren
2018-02-14 18:51 ` [PATCH v8 05/29] directory rename detection: files/directories in the way of some renames Elijah Newren
2018-02-14 18:51 ` [PATCH v8 06/29] directory rename detection: testcases checking which side did the rename Elijah Newren
2018-02-14 18:51 ` [PATCH v8 07/29] directory rename detection: more involved edge/corner testcases Elijah Newren
2018-02-14 18:51 ` [PATCH v8 08/29] directory rename detection: testcases exploring possibly suboptimal merges Elijah Newren
2018-02-14 18:51 ` [PATCH v8 09/29] directory rename detection: miscellaneous testcases to complete coverage Elijah Newren
2018-02-14 18:51 ` [PATCH v8 10/29] directory rename detection: tests for handling overwriting untracked files Elijah Newren
2018-02-14 18:51 ` [PATCH v8 11/29] directory rename detection: tests for handling overwriting dirty files Elijah Newren
2018-02-14 18:51 ` [PATCH v8 12/29] merge-recursive: move the get_renames() function Elijah Newren
2018-02-14 18:51 ` [PATCH v8 13/29] merge-recursive: introduce new functions to handle rename logic Elijah Newren
2018-02-14 18:51 ` [PATCH v8 14/29] merge-recursive: fix leaks of allocated renames and diff_filepairs Elijah Newren
2018-02-14 18:51 ` [PATCH v8 15/29] merge-recursive: make !o->detect_rename codepath more obvious Elijah Newren
2018-02-14 18:51 ` [PATCH v8 16/29] merge-recursive: split out code for determining diff_filepairs Elijah Newren
2018-02-14 18:51 ` [PATCH v8 17/29] merge-recursive: make a helper function for cleanup for handle_renames Elijah Newren
2018-02-14 18:51 ` [PATCH v8 18/29] merge-recursive: add get_directory_renames() Elijah Newren
2018-02-14 18:51 ` [PATCH v8 19/29] merge-recursive: check for directory level conflicts Elijah Newren
2018-02-14 18:51 ` [PATCH v8 20/29] merge-recursive: add computation of collisions due to dir rename & merging Elijah Newren
2018-02-14 18:51 ` [PATCH v8 21/29] merge-recursive: check for file level conflicts then get new name Elijah Newren
2018-02-14 18:51 ` [PATCH v8 22/29] merge-recursive: when comparing files, don't include trees Elijah Newren
2018-02-14 18:52 ` [PATCH v8 23/29] merge-recursive: apply necessary modifications for directory renames Elijah Newren
2018-02-14 18:52 ` [PATCH v8 24/29] merge-recursive: avoid clobbering untracked files with " Elijah Newren
2018-02-14 18:52 ` Elijah Newren [this message]
2018-02-14 18:52 ` [PATCH v8 26/29] merge-recursive: fix remaining directory rename + dirty overwrite cases Elijah Newren
2018-02-14 18:52 ` [PATCH v8 27/29] directory rename detection: new testcases showcasing a pair of bugs Elijah Newren
2018-02-14 18:52 ` [PATCH v8 28/29] merge-recursive: avoid spurious rename/rename conflict from dir renames Elijah Newren
2018-02-14 18:52 ` [PATCH v8 29/29] merge-recursive: ensure we write updates for directory-renamed file Elijah Newren
2018-02-14 19:44 ` [PATCH v8 00/29] Add directory rename detection to git Stefan Beller

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