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Fri, 23 Oct 2020 09:01:38 -0700 (PDT) Message-Id: <2659d1cb987735ec123ca7a82ed7e058e4d6bef0.1603468885.git.gitgitgadget@gmail.com> In-Reply-To: References: From: "Elijah Newren via GitGitGadget" Date: Fri, 23 Oct 2020 16:01:24 +0000 Subject: [PATCH 9/9] t6423: add more details about direct resolution of directories Fcc: Sent Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit MIME-Version: 1.0 To: git@vger.kernel.org Cc: Elijah Newren , Elijah Newren Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Elijah Newren Signed-off-by: Elijah Newren --- t/t6423-merge-rename-directories.sh | 37 ++++++++++++++++------------- 1 file changed, 21 insertions(+), 16 deletions(-) diff --git a/t/t6423-merge-rename-directories.sh b/t/t6423-merge-rename-directories.sh index db694a6316..9e51320ee0 100755 --- a/t/t6423-merge-rename-directories.sh +++ b/t/t6423-merge-rename-directories.sh @@ -4725,20 +4725,22 @@ test_expect_success '12e: Rename/merge subdir into the root, variant 2' ' # folder/subdir/newsubdir/e_Merge2 # folder/subdir/tweaked/{h,Makefile_SUB_Merge1,newfile.py} # folder/unchanged/ -# -# Notes: This testcase happens to exercise lots of the -# optimization-specific codepaths in merge-ort, and also -# demonstrated a failing of the directory rename detection algorithm -# in merge-recursive; newfile.c should not get pushed into -# folder/subdir/newsubdir/, yet merge-recursive put it there because -# the rename of dir/subdir/{a,b,c,d} -> folder/subdir/{a,b,c,d} -# looks like -# dir/ -> folder/, -# whereas the rename of dir/subdir/e -> folder/subdir/newsubdir/e -# looks like -# dir/subdir/ -> folder/subdir/newsubdir/ -# and if we note that newfile.c is found in dir/subdir/, we might -# overlook the dir/ -> folder/ rule that has more weight. +# Things being checked here: +# 1. dir/subdir/newfile.c does not get pushed into folder/subdir/newsubdir/. +# dir/subdir/{a,b,c,d} -> folder/subdir/{a,b,c,d} looks like +# dir/ -> folder/, +# whereas dir/subdir/e -> folder/subdir/newsubdir/e looks like +# dir/subdir/ -> folder/subdir/newsubdir/ +# and if we note that newfile.c is found in dir/subdir/, we might overlook +# the dir/ -> folder/ rule that has more weight. Older git versions did +# this. +# 2. The code to do trivial directory resolves. Note that +# dir/subdir/unchanged/ is unchanged and can be deleted, and files in the +# new folder/subdir/unchanged/ are not needed as a target to any renames. +# Thus, in the second collect_merge_info_callback() we can just resolve +# these two directories trivially without recursing.) +# 3. Exercising the codepaths for caching renames and deletes from one cherry +# pick and re-applying them in the subsequent one. test_setup_12f () { test_create_repo 12f && @@ -4803,7 +4805,7 @@ test_expect_merge_algorithm failure success '12f: Trivial directory resolve, cac git checkout A^0 && git branch Bmod B && - git -c merge.directoryRenames=true rebase A Bmod && + GIT_TRACE2_PERF="$(pwd)/trace.output" git -c merge.directoryRenames=true rebase A Bmod && echo Checking the pick of B1... && @@ -4884,7 +4886,10 @@ test_expect_merge_algorithm failure success '12f: Trivial directory resolve, cac test_seq 2 12 >e_Merge2 && git hash-object e_Merge2 >expect && git rev-parse Bmod:folder/subdir/newsubdir/e >actual && - test_cmp expect actual + test_cmp expect actual && + + grep region_enter.*collect_merge_info trace.output >collect && + test_line_count = 4 collect ) ' -- gitgitgadget