[PATCH 1/3] t5004: test ZIP archives with many entries
- From
René Scharfe <l.s.r@web.de>
- Date
- Aug 22, 2015, 19:06 UTC
- Message-ID
- <55D8C824.6000704@web.de>
- In-Reply-To
- <20150813022545.30116.44787@localhost>
A ZIP file directory has a 16-bit field for the number of entries it contains. There are 64-bit extensions to deal with that. Demonstrate that git archive --format=zip currently doesn't use them and instead overflows the field.
InfoZIP's unzip doesn't care about this field and extracts all files anyway. Software that uses the directory for presenting a filesystem like view quickly -- notably Windows -- depends on it, but doesn't lend itself to an automatic test case easily. Use InfoZIP's zipinfo, which probably isn't available everywhere but at least can provides *some* way to check this field.
To speed things up a bit create and commit only a subset of the files and build a fake tree out of duplicates and pass that to git archive.
Signed-off-by: Rene Scharfe <l.s.r@web.de> --- t/t5004-archive-corner-cases.sh | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+)
diff --git a/t/t5004-archive-corner-cases.sh b/t/t5004-archive-corner-cases.sh index 654adda..c6bd729 100755 --- a/t/t5004-archive-corner-cases.sh +++ b/t/t5004-archive-corner-cases.sh @@ -115,4 +115,44 @@ test_expect_success 'archive empty subtree by direct pathspec' ' check_dir extract sub ' +ZIPINFO=zipinfo + +test_lazy_prereq ZIPINFO ' + n=$("$ZIPINFO" "$TEST_DIRECTORY"/t5004/empty.zip | sed -n "2s/.* //p") + test "x$n" = "x0" +' + +test_expect_failure ZIPINFO 'zip archive with many entries' ' + # add a directory with 256 files + mkdir 00 && + for a in 0 1 2 3 4 5 6 7 8 9 a b c d e f + do + for b in 0 1 2 3 4 5 6 7 8 9 a b c d e f + do + : >00/$a$b + done + done && + git add 00 && + git commit -m "256 files in 1 directory" && + + # duplicate it to get 65536 files in 256 directories + subtree=$(git write-tree --prefix=00/) && + for c in 0 1 2 3 4 5 6 7 8 9 a b c d e f + do + for d in 0 1 2 3 4 5 6 7 8 9 a b c d e f + do + echo "040000 tree $subtree $c$d" + done + done >tree && + tree=$(git mktree <tree) && + + # zip them + git archive -o many.zip $tree && + + # check the number of entries in the ZIP file directory + expr 65536 + 256 >expect && + "$ZIPINFO" many.zip | head -2 | sed -n "2s/.* //p" >actual && + test_cmp expect actual +' + test_done
-- 2.5.0