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git/t/t6001-rev-list-merge-order.sh
Jon Seymour 99c2bc9300 [PATCH] Fix for git-rev-list --merge-order B ^A (A,B share common base) [rev 2] 
This patch makes --merge-order produce the same list as git-rev-list
without --merge-order specified.

In particular, if the graph looks like this:

A
| B
|/
C
|
D

The both git-rev-list B ^A and git-rev-list --merge-order will produce B.

The unit tests have been changed to reflect the fact that the prune
points are now formally part of the start list that is used to perform
the --merge-order sort.

That is: git-rev-list --merge-order A ^D used to produce

= A
| C

It now produces:

^ A
| C

Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-29 20:53:10 -07:00

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#!/bin/sh
#
# Copyright (c) 2005 Jon Seymour
#
test_description='Tests git-rev-list --merge-order functionality'
. ./test-lib.sh
#
# TODO: move the following block (upto --- end ...) into testlib.sh
#
[ -d .git/refs/tags ] || mkdir -p .git/refs/tags
sed_script="";
# Answer the sha1 has associated with the tag. The tag must exist in .git or .git/refs/tags
tag()
{
_tag=$1
[ -f .git/refs/tags/$_tag ] || error "tag: \"$_tag\" does not exist"
cat .git/refs/tags/$_tag
}
# Generate a commit using the text specified to make it unique and the tree
# named by the tag specified.
unique_commit()
{
_text=$1
_tree=$2
shift 2
echo $_text | git-commit-tree $(tag $_tree) "$@"
}
# Save the output of a command into the tag specified. Prepend
# a substitution script for the tag onto the front of $sed_script
save_tag()
{
_tag=$1
[ -n "$_tag" ] || error "usage: save_tag tag commit-args ..."
shift 1
"$@" >.git/refs/tags/$_tag
sed_script="s/$(tag $_tag)/$_tag/g${sed_script+;}$sed_script"
}
# Replace unhelpful sha1 hashses with their symbolic equivalents
entag()
{
sed "$sed_script"
}
# Execute a command after first saving, then setting the GIT_AUTHOR_EMAIL
# tag to a specified value. Restore the original value on return.
as_author()
{
_author=$1
shift 1
_save=$GIT_AUTHOR_EMAIL
export GIT_AUTHOR_EMAIL="$_author"
"$@"
export GIT_AUTHOR_EMAIL="$_save"
}
commit_date()
{
_commit=$1
git-cat-file commit $_commit | sed -n "s/^committer .*> \([0-9]*\) .*/\1/p"
}
on_committer_date()
{
_date=$1
shift 1
GIT_COMMITTER_DATE=$_date "$@"
}
# Execute a command and suppress any error output.
hide_error()
{
"$@" 2>/dev/null
}
check_output()
{
_name=$1
shift 1
if "$@" | entag > $_name.actual
then
diff $_name.expected $_name.actual
else
return 1;
fi
}
# Turn a reasonable test description into a reasonable test name.
# All alphanums translated into -'s which are then compressed and stripped
# from front and back.
name_from_description()
{
tr "'" '-' | tr '~`!@#$%^&*()_+={}[]|\;:"<>,/? ' '-' | tr -s '-' | tr '[A-Z]' '[a-z]' | sed "s/^-*//;s/-*\$//"
}
# Execute the test described by the first argument, by eval'ing
# command line specified in the 2nd argument. Check the status code
# is zero and that the output matches the stream read from
# stdin.
test_output_expect_success()
{
_description=$1
_test=$2
[ $# -eq 2 ] || error "usage: test_output_expect_success description test <<EOF ... EOF"
_name=$(echo $_description | name_from_description)
cat > $_name.expected
test_expect_success "$_description" "check_output $_name $_test"
}
# --- end of stuff to move ---
# test-case specific test function
check_adjacency()
{
read previous
echo "= $previous"
while read next
do
if ! (git-cat-file commit $previous | grep "^parent $next" >/dev/null)
then
echo "^ $next"
else
echo "| $next"
fi
previous=$next
done
}
list_duplicates()
{
"$@" | sort | uniq -d
}
grep_stderr()
{
args=$1
shift 1
"$@" 2>&1 | grep "$args"
}
date >path0
git-update-cache --add path0
save_tag tree git-write-tree
on_committer_date "1971-08-16 00:00:00" hide_error save_tag root unique_commit root tree
on_committer_date "1971-08-16 00:00:01" save_tag l0 unique_commit l0 tree -p root
on_committer_date "1971-08-16 00:00:02" save_tag l1 unique_commit l1 tree -p l0
on_committer_date "1971-08-16 00:00:03" save_tag l2 unique_commit l2 tree -p l1
on_committer_date "1971-08-16 00:00:04" save_tag a0 unique_commit a0 tree -p l2
on_committer_date "1971-08-16 00:00:05" save_tag a1 unique_commit a1 tree -p a0
on_committer_date "1971-08-16 00:00:06" save_tag b1 unique_commit b1 tree -p a0
on_committer_date "1971-08-16 00:00:07" save_tag c1 unique_commit c1 tree -p b1
on_committer_date "1971-08-16 00:00:08" as_author foobar@example.com save_tag b2 unique_commit b2 tree -p b1
on_committer_date "1971-08-16 00:00:09" save_tag b3 unique_commit b2 tree -p b2
on_committer_date "1971-08-16 00:00:10" save_tag c2 unique_commit c2 tree -p c1 -p b2
on_committer_date "1971-08-16 00:00:11" save_tag c3 unique_commit c3 tree -p c2
on_committer_date "1971-08-16 00:00:12" save_tag a2 unique_commit a2 tree -p a1
on_committer_date "1971-08-16 00:00:13" save_tag a3 unique_commit a3 tree -p a2
on_committer_date "1971-08-16 00:00:14" save_tag b4 unique_commit b4 tree -p b3 -p a3
on_committer_date "1971-08-16 00:00:15" save_tag a4 unique_commit a4 tree -p a3 -p b4 -p c3
on_committer_date "1971-08-16 00:00:16" save_tag l3 unique_commit l3 tree -p a4
on_committer_date "1971-08-16 00:00:17" save_tag l4 unique_commit l4 tree -p l3
on_committer_date "1971-08-16 00:00:18" save_tag l5 unique_commit l5 tree -p l4
on_committer_date "1971-08-16 00:00:19" save_tag m1 unique_commit m1 tree -p a4 -p c3
on_committer_date "1971-08-16 00:00:20" save_tag m2 unique_commit m2 tree -p c3 -p a4
on_committer_date "1971-08-16 00:00:21" hide_error save_tag alt_root unique_commit alt_root tree
on_committer_date "1971-08-16 00:00:22" save_tag r0 unique_commit r0 tree -p alt_root
on_committer_date "1971-08-16 00:00:23" save_tag r1 unique_commit r1 tree -p r0
on_committer_date "1971-08-16 00:00:24" save_tag l5r1 unique_commit l5r1 tree -p l5 -p r1
on_committer_date "1971-08-16 00:00:25" save_tag r1l5 unique_commit r1l5 tree -p r1 -p l5
#
# note: as of 20/6, it isn't possible to create duplicate parents, so this
# can't be tested.
#
#on_committer_date "1971-08-16 00:00:20" save_tag m3 unique_commit m3 tree -p c3 -p a4 -p c3
hide_error save_tag e1 as_author e@example.com unique_commit e1 tree
save_tag e2 as_author e@example.com unique_commit e2 tree -p e1
save_tag f1 as_author f@example.com unique_commit f1 tree -p e1
save_tag e3 as_author e@example.com unique_commit e3 tree -p e2
save_tag f2 as_author f@example.com unique_commit f2 tree -p f1
save_tag e4 as_author e@example.com unique_commit e4 tree -p e3 -p f2
save_tag e5 as_author e@example.com unique_commit e5 tree -p e4
save_tag f3 as_author f@example.com unique_commit f3 tree -p f2
save_tag f4 as_author f@example.com unique_commit f4 tree -p f3
save_tag e6 as_author e@example.com unique_commit e6 tree -p e5 -p f4
save_tag f5 as_author f@example.com unique_commit f5 tree -p f4
save_tag f6 as_author f@example.com unique_commit f6 tree -p f5 -p e6
save_tag e7 as_author e@example.com unique_commit e7 tree -p e6
save_tag e8 as_author e@example.com unique_commit e8 tree -p e7
save_tag e9 as_author e@example.com unique_commit e9 tree -p e8
save_tag f7 as_author f@example.com unique_commit f7 tree -p f6
save_tag f8 as_author f@example.com unique_commit f8 tree -p f7
save_tag f9 as_author f@example.com unique_commit f9 tree -p f8
save_tag e10 as_author e@example.com unique_commit e1 tree -p e9 -p f8
hide_error save_tag g0 unique_commit g0 tree
save_tag g1 unique_commit g1 tree -p g0
save_tag h1 unique_commit g2 tree -p g0
save_tag g2 unique_commit g3 tree -p g1 -p h1
save_tag h2 unique_commit g4 tree -p g2
save_tag g3 unique_commit g5 tree -p g2
save_tag g4 unique_commit g6 tree -p g3 -p h2
tag l5 > .git/HEAD
#
# cd to t/trash and use
#
# git-rev-list ... 2>&1 | sed "$(cat sed.script)"
#
# if you ever want to manually debug the operation of git-rev-list
#
echo $sed_script > sed.script
test_expect_success 'rev-list has correct number of entries' 'git-rev-list HEAD | wc -l | tr -s " "' <<EOF
19
EOF
normal_adjacency_count=$(git-rev-list HEAD | check_adjacency | grep -c "\^" | tr -d ' ')
merge_order_adjacency_count=$(git-rev-list --merge-order HEAD | check_adjacency | grep -c "\^" | tr -d ' ')
test_expect_success '--merge-order produces as many or fewer discontinuities' '[ $merge_order_adjacency_count -le $normal_adjacency_count ]'
test_output_expect_success 'simple merge order' 'git-rev-list --merge-order --show-breaks HEAD' <<EOF
= l5
| l4
| l3
= a4
| c3
| c2
| c1
^ b4
| b3
| b2
| b1
^ a3
| a2
| a1
= a0
| l2
| l1
| l0
= root
EOF
test_output_expect_success 'two diamonds merge order (g6)' 'git-rev-list --merge-order --show-breaks g4' <<EOF
= g4
| h2
^ g3
= g2
| h1
^ g1
= g0
EOF
test_output_expect_success 'multiple heads' 'git-rev-list --merge-order a3 b3 c3' <<EOF
c3
c2
c1
b3
b2
b1
a3
a2
a1
a0
l2
l1
l0
root
EOF
test_output_expect_success 'multiple heads, prune at a1' 'git-rev-list --merge-order a3 b3 c3 ^a1' <<EOF
c3
c2
c1
b3
b2
b1
a3
a2
EOF
test_output_expect_success 'multiple heads, prune at l1' 'git-rev-list --merge-order a3 b3 c3 ^l1' <<EOF
c3
c2
c1
b3
b2
b1
a3
a2
a1
a0
l2
EOF
test_output_expect_success 'cross-epoch, head at l5, prune at l1' 'git-rev-list --merge-order l5 ^l1' <<EOF
l5
l4
l3
a4
c3
c2
c1
b4
b3
b2
b1
a3
a2
a1
a0
l2
EOF
test_output_expect_success 'duplicated head arguments' 'git-rev-list --merge-order l5 l5 ^l1' <<EOF
l5
l4
l3
a4
c3
c2
c1
b4
b3
b2
b1
a3
a2
a1
a0
l2
EOF
test_output_expect_success 'prune near merge' 'git-rev-list --merge-order a4 ^c3' <<EOF
a4
b4
b3
a3
a2
a1
EOF
test_output_expect_success "head has no parent" 'git-rev-list --merge-order --show-breaks root' <<EOF
= root
EOF
test_output_expect_success "two nodes - one head, one base" 'git-rev-list --merge-order --show-breaks l0' <<EOF
= l0
= root
EOF
test_output_expect_success "three nodes one head, one internal, one base" 'git-rev-list --merge-order --show-breaks l1' <<EOF
= l1
| l0
= root
EOF
test_output_expect_success "linear prune l2 ^root" 'git-rev-list --merge-order --show-breaks l2 ^root' <<EOF
^ l2
| l1
| l0
EOF
test_output_expect_success "linear prune l2 ^l0" 'git-rev-list --merge-order --show-breaks l2 ^l0' <<EOF
^ l2
| l1
EOF
test_output_expect_success "linear prune l2 ^l1" 'git-rev-list --merge-order --show-breaks l2 ^l1' <<EOF
^ l2
EOF
test_output_expect_success "linear prune l5 ^a4" 'git-rev-list --merge-order --show-breaks l5 ^a4' <<EOF
^ l5
| l4
| l3
EOF
test_output_expect_success "linear prune l5 ^l3" 'git-rev-list --merge-order --show-breaks l5 ^l3' <<EOF
^ l5
| l4
EOF
test_output_expect_success "linear prune l5 ^l4" 'git-rev-list --merge-order --show-breaks l5 ^l4' <<EOF
^ l5
EOF
test_output_expect_success "max-count 10 - merge order" 'git-rev-list --merge-order --show-breaks --max-count=10 l5' <<EOF
= l5
| l4
| l3
= a4
| c3
| c2
| c1
^ b4
| b3
| b2
EOF
test_output_expect_success "max-count 10 - non merge order" 'git-rev-list --max-count=10 l5 | sort' <<EOF
a4
b2
b3
b4
c1
c2
c3
l3
l4
l5
EOF
test_output_expect_success '--max-age=c3, no --merge-order' "git-rev-list --max-age=$(commit_date c3) l5" <<EOF
l5
l4
l3
a4
b4
a3
a2
c3
EOF
test_output_expect_success '--max-age=c3, --merge-order' "git-rev-list --merge-order --max-age=$(commit_date c3) l5" <<EOF
l5
l4
l3
a4
c3
b4
a3
a2
EOF
test_output_expect_success 'one specified head reachable from another a4, c3, --merge-order' "list_duplicates git-rev-list --merge-order a4 c3" <<EOF
EOF
test_output_expect_success 'one specified head reachable from another c3, a4, --merge-order' "list_duplicates git-rev-list --merge-order c3 a4" <<EOF
EOF
test_output_expect_success 'one specified head reachable from another a4, c3, no --merge-order' "list_duplicates git-rev-list a4 c3" <<EOF
EOF
test_output_expect_success 'one specified head reachable from another c3, a4, no --merge-order' "list_duplicates git-rev-list c3 a4" <<EOF
EOF
test_output_expect_success 'graph with c3 and a4 parents of head' "list_duplicates git-rev-list m1" <<EOF
EOF
test_output_expect_success 'graph with a4 and c3 parents of head' "list_duplicates git-rev-list m2" <<EOF
EOF
test_expect_success "head ^head --merge-order" 'git-rev-list --merge-order --show-breaks a3 ^a3' <<EOF
EOF
#
# can't test this now - duplicate parents can't be created
#
#test_output_expect_success 'duplicate parents' 'git-rev-list --parents --merge-order --show-breaks m3' <<EOF
#= m3 c3 a4 c3
#| a4 c3 b4 a3
#| b4 a3 b3
#| b3 b2
#^ a3 a2
#| a2 a1
#| a1 a0
#^ c3 c2
#| c2 b2 c1
#| b2 b1
#^ c1 b1
#| b1 a0
#= a0 l2
#| l2 l1
#| l1 l0
#| l0 root
#= root
#EOF
test_expect_success "head ^head no --merge-order" 'git-rev-list a3 ^a3' <<EOF
EOF
test_output_expect_success 'simple merge order (l5r1)' 'git-rev-list --merge-order --show-breaks l5r1' <<EOF
= l5r1
| r1
| r0
| alt_root
^ l5
| l4
| l3
| a4
| c3
| c2
| c1
^ b4
| b3
| b2
| b1
^ a3
| a2
| a1
| a0
| l2
| l1
| l0
= root
EOF
test_output_expect_success 'simple merge order (r1l5)' 'git-rev-list --merge-order --show-breaks r1l5' <<EOF
= r1l5
| l5
| l4
| l3
| a4
| c3
| c2
| c1
^ b4
| b3
| b2
| b1
^ a3
| a2
| a1
| a0
| l2
| l1
| l0
| root
^ r1
| r0
= alt_root
EOF
test_output_expect_success "don't print things unreachable from one branch" "git-rev-list a3 ^b3 --merge-order" <<EOF
a3
a2
a1
EOF
#
#
test_done
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