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f4eec0ba84
The test for "no shallow lines after receiving ACK ready" is very
sensitive to the timestamps of the commits we create. It's looking for
the fetch negotiation to send a "ready", which in turn depends on the
order in which we traverse commits during the negotiation.
It works reliably now because the base commit "7" is created without
test_commit, and thus gets a commit time matching the current system
clock. Whereas the new commits created in this test do use test_commit,
and get the usual test_tick time from 2005. So the fetch into the
"clone" repository results in a commit graph like this (I omitted some
of the "unrelated" commits for clarity; they're all just a sequence of
test_ticks):
$ git log --graph --format='%ct %s %d'
* 1112912953 new (origin/master, origin/HEAD)
* 1594322236 7 (grafted, master)
* 1112912893 unrelated15 (origin/unrelated15, unrelated15)
[...]
* 1112912053 unrelated1 (origin/unrelated1, unrelated1)
* 1112911993 new-too (HEAD -> newnew, tag: new-too)
The important things to see are:
- "7" is way in the future compared to the other commits
- "new-too" in the fetching repo is older than "new" (and its
"unrelated" ancestors) in the shallow repo
If we change our "setup shallow clone" step to use test_tick, too (and
get rid of the dependency on the system clock), then the test will fail.
The resulting graph looks like this:
$ git log --graph --format='%ct %s %d'
* 1112913373 new (origin/master, origin/HEAD)
* 1112912353 7 (grafted, master)
* 1112913313 unrelated15 (origin/unrelated15, unrelated15)
[...]
* 1112912473 unrelated1 (origin/unrelated1, unrelated1)
* 1112912413 new-too (HEAD -> newnew, tag: new-too)
Our "new-too" is still older than "new" and "unrelated", but now "7" is
older than all of them (because it advanced test_tick, which the other
tests built on top of). In the original, we advertised "7" as the first
"have" before anything else, but now "new-too" is more recent. You'd see
the same thing in the unlikely event that the system clock was set
before our test_tick default in 2005.
Let's make the timing requirements more explicit. The important thing is
that the client advertise all of its shared commits first, before
presenting its unique "new-too" commit. We can do that and get rid of
the system clock dependency at the same time by creating all of the
shared commits around time X (using test_tick), and then creating
"new-too" with some time long before X. The resulting graph looks like
this:
$ git log --graph --format='%ct %s %d'
* 1500001380 new (origin/master, origin/HEAD)
* 1500000420 7 (grafted, master)
* 1500001320 unrelated15 (origin/unrelated15, unrelated15)
[...]
* 1500000480 unrelated1 (origin/unrelated1, unrelated1)
* 1400000060 new-too (HEAD -> newnew, tag: new-too)
That also lets us get rid of the hacky test_tick added by f0e802ca20
(t5539: update a flaky test, 2014-07-14). That was clearly dancing
around the same problem, but only addressed the relationship between
commits created in the two subshells (which did use test_tick, but
overlapped because increments of test_tick in subshells are lost). Now
that we're using consistent and well-placed times for both lines of
history, we don't have to care about a one-tick difference between the
two sides.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
155 lines
4.1 KiB
Bash
Executable File
155 lines
4.1 KiB
Bash
Executable File
#!/bin/sh
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test_description='fetch/clone from a shallow clone over http'
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. ./test-lib.sh
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. "$TEST_DIRECTORY"/lib-httpd.sh
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start_httpd
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commit() {
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echo "$1" >tracked &&
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git add tracked &&
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test_tick &&
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git commit -m "$1"
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}
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test_expect_success 'setup shallow clone' '
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test_tick=1500000000 &&
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commit 1 &&
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commit 2 &&
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commit 3 &&
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commit 4 &&
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commit 5 &&
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commit 6 &&
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commit 7 &&
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git clone --no-local --depth=5 .git shallow &&
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git config --global transfer.fsckObjects true
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'
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test_expect_success 'clone http repository' '
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git clone --bare --no-local shallow "$HTTPD_DOCUMENT_ROOT_PATH/repo.git" &&
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git clone $HTTPD_URL/smart/repo.git clone &&
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(
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cd clone &&
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git fsck &&
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git log --format=%s origin/master >actual &&
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cat <<EOF >expect &&
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7
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6
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5
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4
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3
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EOF
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test_cmp expect actual
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)
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'
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# This test is tricky. We need large enough "have"s that fetch-pack
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# will put pkt-flush in between. Then we need a "have" the server
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# does not have, it'll send "ACK %s ready"
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test_expect_success 'no shallow lines after receiving ACK ready' '
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(
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cd shallow &&
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for i in $(test_seq 15)
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do
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git checkout --orphan unrelated$i &&
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test_commit unrelated$i &&
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git push -q "$HTTPD_DOCUMENT_ROOT_PATH/repo.git" \
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refs/heads/unrelated$i:refs/heads/unrelated$i &&
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git push -q ../clone/.git \
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refs/heads/unrelated$i:refs/heads/unrelated$i ||
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exit 1
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done &&
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git checkout master &&
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test_commit new &&
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git push "$HTTPD_DOCUMENT_ROOT_PATH/repo.git" master
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) &&
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(
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cd clone &&
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git checkout --orphan newnew &&
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test_tick=1400000000 &&
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test_commit new-too &&
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# NEEDSWORK: If the overspecification of the expected result is reduced, we
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# might be able to run this test in all protocol versions.
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GIT_TRACE_PACKET="$TRASH_DIRECTORY/trace" GIT_TEST_PROTOCOL_VERSION=0 \
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git fetch --depth=2 &&
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grep "fetch-pack< ACK .* ready" ../trace &&
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! grep "fetch-pack> done" ../trace
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)
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'
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test_expect_success 'clone shallow since ...' '
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test_create_repo shallow-since &&
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(
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cd shallow-since &&
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GIT_COMMITTER_DATE="100000000 +0700" git commit --allow-empty -m one &&
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GIT_COMMITTER_DATE="200000000 +0700" git commit --allow-empty -m two &&
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GIT_COMMITTER_DATE="300000000 +0700" git commit --allow-empty -m three &&
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mv .git "$HTTPD_DOCUMENT_ROOT_PATH/shallow-since.git" &&
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git clone --shallow-since "300000000 +0700" $HTTPD_URL/smart/shallow-since.git ../shallow11 &&
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git -C ../shallow11 log --pretty=tformat:%s HEAD >actual &&
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echo three >expected &&
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test_cmp expected actual
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)
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'
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test_expect_success 'fetch shallow since ...' '
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git -C shallow11 fetch --shallow-since "200000000 +0700" origin &&
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git -C shallow11 log --pretty=tformat:%s origin/master >actual &&
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cat >expected <<-\EOF &&
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three
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two
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EOF
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test_cmp expected actual
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'
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test_expect_success 'shallow clone exclude tag two' '
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test_create_repo shallow-exclude &&
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(
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cd shallow-exclude &&
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test_commit one &&
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test_commit two &&
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test_commit three &&
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mv .git "$HTTPD_DOCUMENT_ROOT_PATH/shallow-exclude.git" &&
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git clone --shallow-exclude two $HTTPD_URL/smart/shallow-exclude.git ../shallow12 &&
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git -C ../shallow12 log --pretty=tformat:%s HEAD >actual &&
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echo three >expected &&
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test_cmp expected actual
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)
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'
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test_expect_success 'fetch exclude tag one' '
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git -C shallow12 fetch --shallow-exclude one origin &&
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git -C shallow12 log --pretty=tformat:%s origin/master >actual &&
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test_write_lines three two >expected &&
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test_cmp expected actual
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'
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test_expect_success 'fetching deepen' '
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test_create_repo shallow-deepen &&
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(
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cd shallow-deepen &&
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test_commit one &&
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test_commit two &&
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test_commit three &&
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mv .git "$HTTPD_DOCUMENT_ROOT_PATH/shallow-deepen.git" &&
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git clone --depth 1 $HTTPD_URL/smart/shallow-deepen.git deepen &&
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mv "$HTTPD_DOCUMENT_ROOT_PATH/shallow-deepen.git" .git &&
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test_commit four &&
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git -C deepen log --pretty=tformat:%s master >actual &&
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echo three >expected &&
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test_cmp expected actual &&
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mv .git "$HTTPD_DOCUMENT_ROOT_PATH/shallow-deepen.git" &&
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git -C deepen fetch --deepen=1 &&
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git -C deepen log --pretty=tformat:%s origin/master >actual &&
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cat >expected <<-\EOF &&
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four
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three
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two
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EOF
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test_cmp expected actual
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)
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'
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test_done
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