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4e7346735a
This patch fixes three bugs in --merge-order support
* mark_ancestors_uninteresting was unnecessarily exponential which
caused a problem when a commit with no parents was merged near the
head of something like the linux kernel
* removed a spurious statement from find_base which wasn't
apparently causing problems now, but wasn't correct either.
* removed an unnecessarily strict check from find_base_for_list
that causes a problem if git-rev-list commit ^parent-of-commit
is specified.
* added some unit tests which were accidentally omitted from
original merge-order patch
The fix to mark_ancestors_uninteresting isn't an optimal fix - a full
graph scan will still be performed in this case even though it is
not strictly required. However, a full graph scan is linear
and still no worse than git-rev-list HEAD which runs in less than 2
seconds on a warm cache.
Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
176 lines
3.7 KiB
Bash
176 lines
3.7 KiB
Bash
#!/bin/sh
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#
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# Copyright (c) 2005 Jon Seymour
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#
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test_description='Test rev-list --merge-order
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'
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. ./test-lib.sh
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function do_commit
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{
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git-commit-tree "$@" </dev/null
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}
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function check_adjacency
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{
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read previous
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echo "= $previous"
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while read next
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do
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if ! (git-cat-file commit $previous | grep "^parent $next" >/dev/null)
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then
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echo "^ $next"
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else
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echo "| $next"
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fi
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previous=$next
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done
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}
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function sed_script
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{
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for c in root a0 a1 a2 a3 a4 b1 b2 b3 b4 c1 c2 c3 l0 l1 l2 l3 l4 l5
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do
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echo -n "s/${!c}/$c/;"
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done
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}
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date >path0
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git-update-cache --add path0
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tree=$(git-write-tree)
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root=$(do_commit $tree 2>/dev/null)
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export GIT_COMMITTER_NAME=foobar # to guarantee that the commit is different
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l0=$(do_commit $tree -p $root)
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l1=$(do_commit $tree -p $l0)
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l2=$(do_commit $tree -p $l1)
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a0=$(do_commit $tree -p $l2)
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a1=$(do_commit $tree -p $a0)
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export GIT_COMMITTER_NAME=foobar2 # to guarantee that the commit is different
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b1=$(do_commit $tree -p $a0)
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c1=$(do_commit $tree -p $b1)
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export GIT_COMMITTER_NAME=foobar3 # to guarantee that the commit is different
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b2=$(do_commit $tree -p $b1)
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b3=$(do_commit $tree -p $b2)
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c2=$(do_commit $tree -p $c1 -p $b2)
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c3=$(do_commit $tree -p $c2)
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a2=$(do_commit $tree -p $a1)
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a3=$(do_commit $tree -p $a2)
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b4=$(do_commit $tree -p $b3 -p $a3)
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a4=$(do_commit $tree -p $a3 -p $b4 -p $c3)
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l3=$(do_commit $tree -p $a4)
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l4=$(do_commit $tree -p $l3)
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l5=$(do_commit $tree -p $l4)
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echo $l5 > .git/HEAD
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git-rev-list --merge-order --show-breaks HEAD | sed "$(sed_script)" > actual-merge-order
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cat > expected-merge-order <<EOF
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= l5
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| l4
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| l3
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= a4
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| c3
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| c2
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| c1
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^ b4
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| b3
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| b2
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| b1
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^ a3
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| a2
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| a1
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= a0
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| l2
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| l1
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| l0
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= root
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EOF
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git-rev-list HEAD | check_adjacency | sed "$(sed_script)" > actual-default-order
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normal_adjacency_count=$(git-rev-list HEAD | check_adjacency | grep -c "\^" | tr -d ' ')
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merge_order_adjacency_count=$(git-rev-list --merge-order HEAD | check_adjacency | grep -c "\^" | tr -d ' ')
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test_expect_success 'Testing that the rev-list has correct number of entries' '[ $(git-rev-list HEAD | wc -l) -eq 19 ]'
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test_expect_success 'Testing that --merge-order produces the correct result' 'diff expected-merge-order actual-merge-order'
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test_expect_success 'Testing that --merge-order produces as many or fewer discontinuities' '[ $merge_order_adjacency_count -le $normal_adjacency_count ]'
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cat > expected-merge-order-1 <<EOF
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c3
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c2
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c1
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b3
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b2
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b1
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a3
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a2
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a1
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a0
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l2
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l1
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l0
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root
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EOF
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git-rev-list --merge-order $a3 $b3 $c3 | sed "$(sed_script)" > actual-merge-order-1
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test_expect_success 'Testing multiple heads' 'diff expected-merge-order-1 actual-merge-order-1'
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cat > expected-merge-order-2 <<EOF
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c3
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c2
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c1
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b3
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b2
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b1
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a3
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a2
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EOF
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git-rev-list --merge-order $a3 $b3 $c3 ^$a1 | sed "$(sed_script)" > actual-merge-order-2
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test_expect_success 'Testing stop' 'diff expected-merge-order-2 actual-merge-order-2'
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cat > expected-merge-order-3 <<EOF
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c3
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c2
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c1
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b3
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b2
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b1
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a3
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a2
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a1
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a0
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l2
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EOF
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git-rev-list --merge-order $a3 $b3 $c3 ^$l1 | sed "$(sed_script)" > actual-merge-order-3
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test_expect_success 'Testing stop in linear epoch' 'diff expected-merge-order-3 actual-merge-order-3'
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cat > expected-merge-order-4 <<EOF
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l5
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l4
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l3
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a4
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c3
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c2
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c1
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b4
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b3
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b2
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b1
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a3
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a2
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a1
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a0
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l2
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EOF
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git-rev-list --merge-order $l5 ^$l1 | sed "$(sed_script)" > actual-merge-order-4
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test_expect_success 'Testing start in linear epoch, stop after non-linear epoch' 'diff expected-merge-order-4 actual-merge-order-4'
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git-rev-list --merge-order $l5 $l5 ^$l1 2>/dev/null | sed "$(sed_script)" > actual-merge-order-5
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test_expect_success 'Testing duplicated start arguments' 'diff expected-merge-order-4 actual-merge-order-5'
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test_expect_success 'Testing exclusion near merge' 'git-rev-list --merge-order $a4 ^$c3 2>/dev/null'
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test_done
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