tgif.git - Terin's Improved Git Fork

Age	Commit message (Collapse)	Author	Files	Lines
2018-08-30	am: avoid directory rename detection when calling recursive merge machinery	Elijah Newren	1	-2/+2
	Let's say you have the following three trees, where Base is from one commit behind either master or branch: Base : bar_v1, foo/{file1, file2, file3} branch: bar_v2, foo/{file1, file2}, goo/file3 master: bar_v3, foo/{file1, file2, file3} Using git-am (or am-based rebase) to apply the changes from branch onto master results in the following tree: Result: bar_merged, goo/{file1, file2, file3} This is not what users want; they did not rename foo/ -> goo/, they only renamed one file within that directory. The reason this happens is am constructs fake trees (via build_fake_ancestor()) of the following form: Base_bfa : bar_v1, foo/file3 branch_bfa: bar_v2, goo/file3 Combining these two trees with master's tree: master: bar_v3, foo/{file1, file2, file3}, You can see that merge_recursive_generic() would see branch_bfa as renaming foo/ -> goo/, and master as just adding both foo/file1 and foo/file2. As such, it ends up with goo/{file1, file2, file3} The core problem is that am does not have access to the original trees; it can only construct trees using the blobs involved in the patch. As such, it is not safe to perform directory rename detection within am -3. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-30	t3401: add another directory rename testcase for rebase and am	Elijah Newren	1	-1/+109
	Similar to commit 16346883ab ("t3401: add directory rename testcases for rebase and am", 2018-06-27), add another testcase for directory rename detection. This new testcase differs in that it showcases a situation where no directory rename was performed, but which some backends incorrectly detect. As with the other testcase, run this in conjunction with each of the types of rebases: git-rebase--interactive git-rebase--am git-rebase--merge and also use the same testcase for git am --3way Reported-by: Nikolay Kasyanov <corrmage@gmail.com> Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-27	t3401: add directory rename testcases for rebase and am	Elijah Newren	1	-0/+105
	Add a simple directory rename testcase, in conjunction with each of the types of rebases: git-rebase--interactive git-rebase--am git-rebase--merge and also use the same testcase for git am --3way This demonstrates a difference in behavior between the different rebase backends in regards to directory rename detection. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>