[PATCH/RFC v2 4/4] remote-curl: main test case for the OS command line overflow
- From
Ivan Todoroski <grnch@gmx.net>
- Date
- Mar 27, 2012, 06:28 UTC
- Message-ID
- <4F715DF6.7080401@gmx.net>
- In-Reply-To
- <4F715CF7.5070903@gmx.net>
This is main test case for the original problem that triggered this patch series. We create a repo with 50k tags and then test whether git-clone over the smart HTTP protocol succeeds.
Note that we construct the repo in a slightly different way than the original script used to reproduce the problem. This is because the original script just created 50k tags all pointing to the same commit, so if there was a bug where remote-curl.c was not passing all the refs to fetch-pack we wouldn't know. The clone would succed even if only one tag was passed, because all the other tags were pointing at the same SHA and would be considered present.
Instead we create a repo with 50k independent (dangling) commits and then tag each of those commits with a unique tag. This way if one of the tags is not given to fetch-pack, later stages of the clone would complain about it.
This allows us to test both that the command line overflow was fixed, as well as that it was fixed in a way that doesn't leave out any of the refs. --- t/t5551-http-fetch.sh | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+)
diff --git a/t/t5551-http-fetch.sh b/t/t5551-http-fetch.sh index 26d355725f..fb970bda22 100755 --- a/t/t5551-http-fetch.sh +++ b/t/t5551-http-fetch.sh @@ -109,5 +109,37 @@ test_expect_success 'follow redirects (302)' ' git clone $HTTPD_URL/smart-redir-temp/repo.git --quiet repo-t ' + +test -n "$GIT_TEST_LONG" && test_set_prereq EXPENSIVE + +test_expect_success EXPENSIVE 'create 50,000 tags in the repo' ' + ( + cd "$HTTPD_DOCUMENT_ROOT_PATH/repo.git" && + N=50000 && + for ((i=1; i<=$N; i++)); do + echo "commit refs/heads/too-many-refs" + echo "mark :$i" + echo "committer git <git@example.com> $i +0000" + echo "data 0" + echo "M 644 inline bla.txt" + echo "data 4" + echo "bla" + # make every commit dangling by always + # rewinding the branch after each commit + echo "reset refs/heads/too-many-refs" + echo "from :1" + done | git fast-import --export-marks=marks && + + # now assign tags to all the dangling commits we created above + export tag=refs/tags/artificially-long-tag-name-to-more-easily-demonstrate-the-problem && + perl -nle '\''/:(.+) (.+)/; print "$2 $ENV{tag}-$1"'\'' < marks >> packed-refs + ) +' + +test_expect_success EXPENSIVE 'clone the 50,000 tag repo to check OS command line overflow' ' + git clone $HTTPD_URL/smart/repo.git too-many-refs 2> too-many-refs.err && + test_line_count = 0 too-many-refs.err +' + stop_httpd test_done
-- 1.7.9.5.4.g4f508