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git/t/t6600-test-reach.sh
Derrick Stolee 9c1732ca11 for-each-ref: add 'is-base' token 
The previous change introduced the get_branch_base_for_tip() method in
commit-reach.c. The motivation of that change was about using a heuristic to
deteremine the base branch for a source commit from a list of candidate
commit tips. This change makes that algorithm visible to users via a new
atom in the 'git for-each-ref' format. This change is very similar to the
chang in 49abcd21da (for-each-ref: add ahead-behind format atom,
2023-03-20).

Introduce the 'is-base:<source>' atom, which will indicate that the
algorithm should be computed and the result of the algorithm is reported
using an indicator of the form '(<source>)'. For example, using
'%(is-base:HEAD)' would result in one line having the token '(HEAD)'.

Use the sorted order of refs included in the ref filter to break ties in the
algorithm's heuristic. In the previous change, the motivating examples
include using an L0 trunk, long-lived L1 branches, and temporary release
branches. A caller could communicate the ordered preference among these
categories using the input refpecs and avoiding a different sort mechanism.
This sorting behavior is tested in the test scripts.

It is important to include this atom as a special case to
can_do_iterative_format() to match the expectations created in bd98f9774e
(ref-filter.c: filter & format refs in the same callback, 2023-11-14). The
ahead-behind atom was one of the special cases, and this similarly requires
using an algorithm across all input refs before starting the format of any
single ref.

In the test script, the format tokens use colons or lack whitespace to avoid
Git complaining about trailing whitespace errors.

Signed-off-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-08-14 10:10:06 -07:00

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#!/bin/sh
test_description='basic commit reachability tests'
. ./test-lib.sh
# Construct a grid-like commit graph with points (x,y)
# with 1 <= x <= 10, 1 <= y <= 10, where (x,y) has
# parents (x-1, y) and (x, y-1), keeping in mind that
# we drop a parent if a coordinate is nonpositive.
#
# (10,10)
# / \
# (10,9) (9,10)
# / \ / \
# (10,8) (9,9) (8,10)
# / \ / \ / \
# ( continued...)
# \ / \ / \ /
# (3,1) (2,2) (1,3)
# \ / \ /
# (2,1) (2,1)
# \ /
# (1,1)
#
# We use branch 'commit-x-y' to refer to (x,y).
# This grid allows interesting reachability and
# non-reachability queries: (x,y) can reach (x',y')
# if and only if x' <= x and y' <= y.
test_expect_success 'setup' '
for i in $(test_seq 1 10)
do
test_commit "1-$i" &&
git branch -f commit-1-$i &&
git tag -a -m "1-$i" tag-1-$i commit-1-$i || return 1
done &&
for j in $(test_seq 1 9)
do
git reset --hard commit-$j-1 &&
x=$(($j + 1)) &&
test_commit "$x-1" &&
git branch -f commit-$x-1 &&
git tag -a -m "$x-1" tag-$x-1 commit-$x-1 &&
for i in $(test_seq 2 10)
do
git merge commit-$j-$i -m "$x-$i" &&
git branch -f commit-$x-$i &&
git tag -a -m "$x-$i" tag-$x-$i commit-$x-$i || return 1
done
done &&
git commit-graph write --reachable &&
mv .git/objects/info/commit-graph commit-graph-full &&
chmod u+w commit-graph-full &&
git show-ref -s commit-5-5 | git commit-graph write --stdin-commits &&
mv .git/objects/info/commit-graph commit-graph-half &&
chmod u+w commit-graph-half &&
git -c commitGraph.generationVersion=1 commit-graph write --reachable &&
mv .git/objects/info/commit-graph commit-graph-no-gdat &&
chmod u+w commit-graph-no-gdat &&
git config core.commitGraph true
'
run_all_modes () {
test_when_finished rm -rf .git/objects/info/commit-graph &&
"$@" <input >actual &&
test_cmp expect actual &&
cp commit-graph-full .git/objects/info/commit-graph &&
"$@" <input >actual &&
test_cmp expect actual &&
cp commit-graph-half .git/objects/info/commit-graph &&
"$@" <input >actual &&
test_cmp expect actual &&
cp commit-graph-no-gdat .git/objects/info/commit-graph &&
"$@" <input >actual &&
test_cmp expect actual
}
test_all_modes () {
run_all_modes test-tool reach "$@"
}
test_expect_success 'ref_newer:miss' '
cat >input <<-\EOF &&
A:commit-5-7
B:commit-4-9
EOF
echo "ref_newer(A,B):0" >expect &&
test_all_modes ref_newer
'
test_expect_success 'ref_newer:hit' '
cat >input <<-\EOF &&
A:commit-5-7
B:commit-2-3
EOF
echo "ref_newer(A,B):1" >expect &&
test_all_modes ref_newer
'
test_expect_success 'in_merge_bases:hit' '
cat >input <<-\EOF &&
A:commit-5-7
B:commit-8-8
EOF
echo "in_merge_bases(A,B):1" >expect &&
test_all_modes in_merge_bases
'
test_expect_success 'in_merge_bases:miss' '
cat >input <<-\EOF &&
A:commit-6-8
B:commit-5-9
EOF
echo "in_merge_bases(A,B):0" >expect &&
test_all_modes in_merge_bases
'
test_expect_success 'in_merge_bases_many:hit' '
cat >input <<-\EOF &&
A:commit-6-8
X:commit-6-9
X:commit-5-7
EOF
echo "in_merge_bases_many(A,X):1" >expect &&
test_all_modes in_merge_bases_many
'
test_expect_success 'in_merge_bases_many:miss' '
cat >input <<-\EOF &&
A:commit-6-8
X:commit-7-7
X:commit-8-6
EOF
echo "in_merge_bases_many(A,X):0" >expect &&
test_all_modes in_merge_bases_many
'
test_expect_success 'in_merge_bases_many:miss-heuristic' '
cat >input <<-\EOF &&
A:commit-6-8
X:commit-7-5
X:commit-6-6
EOF
echo "in_merge_bases_many(A,X):0" >expect &&
test_all_modes in_merge_bases_many
'
test_expect_success 'is_descendant_of:hit' '
cat >input <<-\EOF &&
A:commit-5-7
X:commit-4-8
X:commit-6-6
X:commit-1-1
EOF
echo "is_descendant_of(A,X):1" >expect &&
test_all_modes is_descendant_of
'
test_expect_success 'is_descendant_of:miss' '
cat >input <<-\EOF &&
A:commit-6-8
X:commit-5-9
X:commit-4-10
X:commit-7-6
EOF
echo "is_descendant_of(A,X):0" >expect &&
test_all_modes is_descendant_of
'
test_expect_success 'get_merge_bases_many' '
cat >input <<-\EOF &&
A:commit-5-7
X:commit-4-8
X:commit-6-6
X:commit-8-3
EOF
{
echo "get_merge_bases_many(A,X):" &&
git rev-parse commit-5-6 \
commit-4-7 | sort
} >expect &&
test_all_modes get_merge_bases_many
'
test_expect_success 'reduce_heads' '
cat >input <<-\EOF &&
X:commit-1-10
X:commit-2-8
X:commit-3-6
X:commit-4-4
X:commit-1-7
X:commit-2-5
X:commit-3-3
X:commit-5-1
EOF
{
echo "reduce_heads(X):" &&
git rev-parse commit-5-1 \
commit-4-4 \
commit-3-6 \
commit-2-8 \
commit-1-10 | sort
} >expect &&
test_all_modes reduce_heads
'
test_expect_success 'can_all_from_reach:hit' '
cat >input <<-\EOF &&
X:commit-2-10
X:commit-3-9
X:commit-4-8
X:commit-5-7
X:commit-6-6
X:commit-7-5
X:commit-8-4
X:commit-9-3
Y:commit-1-9
Y:commit-2-8
Y:commit-3-7
Y:commit-4-6
Y:commit-5-5
Y:commit-6-4
Y:commit-7-3
Y:commit-8-1
EOF
echo "can_all_from_reach(X,Y):1" >expect &&
test_all_modes can_all_from_reach
'
test_expect_success 'can_all_from_reach:miss' '
cat >input <<-\EOF &&
X:commit-2-10
X:commit-3-9
X:commit-4-8
X:commit-5-7
X:commit-6-6
X:commit-7-5
X:commit-8-4
X:commit-9-3
Y:commit-1-9
Y:commit-2-8
Y:commit-3-7
Y:commit-4-6
Y:commit-5-5
Y:commit-6-4
Y:commit-8-5
EOF
echo "can_all_from_reach(X,Y):0" >expect &&
test_all_modes can_all_from_reach
'
test_expect_success 'can_all_from_reach_with_flag: tags case' '
cat >input <<-\EOF &&
X:tag-2-10
X:tag-3-9
X:tag-4-8
X:commit-5-7
X:commit-6-6
X:commit-7-5
X:commit-8-4
X:commit-9-3
Y:tag-1-9
Y:tag-2-8
Y:tag-3-7
Y:commit-4-6
Y:commit-5-5
Y:commit-6-4
Y:commit-7-3
Y:commit-8-1
EOF
echo "can_all_from_reach_with_flag(X,_,_,0,0):1" >expect &&
test_all_modes can_all_from_reach_with_flag
'
test_expect_success 'commit_contains:hit' '
cat >input <<-\EOF &&
A:commit-7-7
X:commit-2-10
X:commit-3-9
X:commit-4-8
X:commit-5-7
X:commit-6-6
X:commit-7-5
X:commit-8-4
X:commit-9-3
EOF
echo "commit_contains(_,A,X,_):1" >expect &&
test_all_modes commit_contains &&
test_all_modes commit_contains --tag
'
test_expect_success 'commit_contains:miss' '
cat >input <<-\EOF &&
A:commit-6-5
X:commit-2-10
X:commit-3-9
X:commit-4-8
X:commit-5-7
X:commit-6-6
X:commit-7-5
X:commit-8-4
X:commit-9-3
EOF
echo "commit_contains(_,A,X,_):0" >expect &&
test_all_modes commit_contains &&
test_all_modes commit_contains --tag
'
test_expect_success 'rev-list: basic topo-order' '
git rev-parse \
commit-6-6 commit-5-6 commit-4-6 commit-3-6 commit-2-6 commit-1-6 \
commit-6-5 commit-5-5 commit-4-5 commit-3-5 commit-2-5 commit-1-5 \
commit-6-4 commit-5-4 commit-4-4 commit-3-4 commit-2-4 commit-1-4 \
commit-6-3 commit-5-3 commit-4-3 commit-3-3 commit-2-3 commit-1-3 \
commit-6-2 commit-5-2 commit-4-2 commit-3-2 commit-2-2 commit-1-2 \
commit-6-1 commit-5-1 commit-4-1 commit-3-1 commit-2-1 commit-1-1 \
>expect &&
run_all_modes git rev-list --topo-order commit-6-6
'
test_expect_success 'rev-list: first-parent topo-order' '
git rev-parse \
commit-6-6 \
commit-6-5 \
commit-6-4 \
commit-6-3 \
commit-6-2 \
commit-6-1 commit-5-1 commit-4-1 commit-3-1 commit-2-1 commit-1-1 \
>expect &&
run_all_modes git rev-list --first-parent --topo-order commit-6-6
'
test_expect_success 'rev-list: range topo-order' '
git rev-parse \
commit-6-6 commit-5-6 commit-4-6 commit-3-6 commit-2-6 commit-1-6 \
commit-6-5 commit-5-5 commit-4-5 commit-3-5 commit-2-5 commit-1-5 \
commit-6-4 commit-5-4 commit-4-4 commit-3-4 commit-2-4 commit-1-4 \
commit-6-3 commit-5-3 commit-4-3 \
commit-6-2 commit-5-2 commit-4-2 \
commit-6-1 commit-5-1 commit-4-1 \
>expect &&
run_all_modes git rev-list --topo-order commit-3-3..commit-6-6
'
test_expect_success 'rev-list: range topo-order' '
git rev-parse \
commit-6-6 commit-5-6 commit-4-6 \
commit-6-5 commit-5-5 commit-4-5 \
commit-6-4 commit-5-4 commit-4-4 \
commit-6-3 commit-5-3 commit-4-3 \
commit-6-2 commit-5-2 commit-4-2 \
commit-6-1 commit-5-1 commit-4-1 \
>expect &&
run_all_modes git rev-list --topo-order commit-3-8..commit-6-6
'
test_expect_success 'rev-list: first-parent range topo-order' '
git rev-parse \
commit-6-6 \
commit-6-5 \
commit-6-4 \
commit-6-3 \
commit-6-2 \
commit-6-1 commit-5-1 commit-4-1 \
>expect &&
run_all_modes git rev-list --first-parent --topo-order commit-3-8..commit-6-6
'
test_expect_success 'rev-list: ancestry-path topo-order' '
git rev-parse \
commit-6-6 commit-5-6 commit-4-6 commit-3-6 \
commit-6-5 commit-5-5 commit-4-5 commit-3-5 \
commit-6-4 commit-5-4 commit-4-4 commit-3-4 \
commit-6-3 commit-5-3 commit-4-3 \
>expect &&
run_all_modes git rev-list --topo-order --ancestry-path commit-3-3..commit-6-6
'
test_expect_success 'rev-list: symmetric difference topo-order' '
git rev-parse \
commit-6-6 commit-5-6 commit-4-6 \
commit-6-5 commit-5-5 commit-4-5 \
commit-6-4 commit-5-4 commit-4-4 \
commit-6-3 commit-5-3 commit-4-3 \
commit-6-2 commit-5-2 commit-4-2 \
commit-6-1 commit-5-1 commit-4-1 \
commit-3-8 commit-2-8 commit-1-8 \
commit-3-7 commit-2-7 commit-1-7 \
>expect &&
run_all_modes git rev-list --topo-order commit-3-8...commit-6-6
'
test_expect_success 'get_reachable_subset:all' '
cat >input <<-\EOF &&
X:commit-9-1
X:commit-8-3
X:commit-7-5
X:commit-6-6
X:commit-1-7
Y:commit-3-3
Y:commit-1-7
Y:commit-5-6
EOF
(
echo "get_reachable_subset(X,Y)" &&
git rev-parse commit-3-3 \
commit-1-7 \
commit-5-6 | sort
) >expect &&
test_all_modes get_reachable_subset
'
test_expect_success 'get_reachable_subset:some' '
cat >input <<-\EOF &&
X:commit-9-1
X:commit-8-3
X:commit-7-5
X:commit-1-7
Y:commit-3-3
Y:commit-1-7
Y:commit-5-6
EOF
(
echo "get_reachable_subset(X,Y)" &&
git rev-parse commit-3-3 \
commit-1-7 | sort
) >expect &&
test_all_modes get_reachable_subset
'
test_expect_success 'get_reachable_subset:none' '
cat >input <<-\EOF &&
X:commit-9-1
X:commit-8-3
X:commit-7-5
X:commit-1-7
Y:commit-9-3
Y:commit-7-6
Y:commit-2-8
EOF
echo "get_reachable_subset(X,Y)" >expect &&
test_all_modes get_reachable_subset
'
test_expect_success 'for-each-ref ahead-behind:linear' '
cat >input <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-1-3
refs/heads/commit-1-5
refs/heads/commit-1-8
EOF
cat >expect <<-\EOF &&
refs/heads/commit-1-1 0 8
refs/heads/commit-1-3 0 6
refs/heads/commit-1-5 0 4
refs/heads/commit-1-8 0 1
EOF
run_all_modes git for-each-ref \
--format="%(refname) %(ahead-behind:commit-1-9)" --stdin
'
test_expect_success 'for-each-ref ahead-behind:all' '
cat >input <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-2-4
refs/heads/commit-4-2
refs/heads/commit-4-4
EOF
cat >expect <<-\EOF &&
refs/heads/commit-1-1 0 24
refs/heads/commit-2-4 0 17
refs/heads/commit-4-2 0 17
refs/heads/commit-4-4 0 9
EOF
run_all_modes git for-each-ref \
--format="%(refname) %(ahead-behind:commit-5-5)" --stdin
'
test_expect_success 'for-each-ref ahead-behind:some' '
cat >input <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-5-3
refs/heads/commit-4-8
refs/heads/commit-9-9
EOF
cat >expect <<-\EOF &&
refs/heads/commit-1-1 0 53
refs/heads/commit-4-8 8 30
refs/heads/commit-5-3 0 39
refs/heads/commit-9-9 27 0
EOF
run_all_modes git for-each-ref \
--format="%(refname) %(ahead-behind:commit-9-6)" --stdin
'
test_expect_success 'for-each-ref ahead-behind:some, multibase' '
cat >input <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-5-3
refs/heads/commit-7-8
refs/heads/commit-4-8
refs/heads/commit-9-9
EOF
cat >expect <<-\EOF &&
refs/heads/commit-1-1 0 53 0 53
refs/heads/commit-4-8 8 30 0 22
refs/heads/commit-5-3 0 39 0 39
refs/heads/commit-7-8 14 12 8 6
refs/heads/commit-9-9 27 0 27 0
EOF
run_all_modes git for-each-ref \
--format="%(refname) %(ahead-behind:commit-9-6) %(ahead-behind:commit-6-9)" \
--stdin
'
test_expect_success 'for-each-ref ahead-behind:none' '
cat >input <<-\EOF &&
refs/heads/commit-7-5
refs/heads/commit-4-8
refs/heads/commit-9-9
EOF
cat >expect <<-\EOF &&
refs/heads/commit-4-8 16 16
refs/heads/commit-7-5 7 4
refs/heads/commit-9-9 49 0
EOF
run_all_modes git for-each-ref \
--format="%(refname) %(ahead-behind:commit-8-4)" --stdin
'
test_expect_success 'for-each-ref merged:linear' '
cat >input <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-1-3
refs/heads/commit-1-5
refs/heads/commit-1-8
refs/heads/commit-2-1
refs/heads/commit-5-1
refs/heads/commit-9-1
EOF
cat >expect <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-1-3
refs/heads/commit-1-5
refs/heads/commit-1-8
EOF
run_all_modes git for-each-ref --merged=commit-1-9 \
--format="%(refname)" --stdin
'
test_expect_success 'for-each-ref merged:all' '
cat >input <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-2-4
refs/heads/commit-4-2
refs/heads/commit-4-4
EOF
cat >expect <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-2-4
refs/heads/commit-4-2
refs/heads/commit-4-4
EOF
run_all_modes git for-each-ref --merged=commit-5-5 \
--format="%(refname)" --stdin
'
test_expect_success 'for-each-ref ahead-behind:some' '
cat >input <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-5-3
refs/heads/commit-4-8
refs/heads/commit-9-9
EOF
cat >expect <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-5-3
EOF
run_all_modes git for-each-ref --merged=commit-9-6 \
--format="%(refname)" --stdin
'
test_expect_success 'for-each-ref merged:some, multibase' '
cat >input <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-5-3
refs/heads/commit-7-8
refs/heads/commit-4-8
refs/heads/commit-9-9
EOF
cat >expect <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-4-8
refs/heads/commit-5-3
EOF
run_all_modes git for-each-ref \
--merged=commit-5-8 \
--merged=commit-8-5 \
--format="%(refname)" \
--stdin
'
test_expect_success 'for-each-ref merged:none' '
cat >input <<-\EOF &&
refs/heads/commit-7-5
refs/heads/commit-4-8
refs/heads/commit-9-9
EOF
>expect &&
run_all_modes git for-each-ref --merged=commit-8-4 \
--format="%(refname)" --stdin
'
# For get_branch_base_for_tip, we only care about
# first-parent history. Here is the test graph with
# second parents removed:
#
# (10,10)
# /
# (10,9) (9,10)
# / /
# (10,8) (9,9) (8,10)
# / / /
# ( continued...)
# \ / / /
# (3,1) (2,2) (1,3)
# \ / /
# (2,1) (1,2)
# \ /
# (1,1)
#
# In short, for a commit (i,j), the first-parent history
# walks all commits (i, k) with k from j to 1, then the
# commits (l, 1) with l from i to 1.
test_expect_success 'get_branch_base_for_tip: none reach' '
# (2,3) branched from the first tip (i,4) in X with i > 2
cat >input <<-\EOF &&
A:commit-2-3
X:commit-1-2
X:commit-1-4
X:commit-4-4
X:commit-8-4
X:commit-10-4
EOF
echo "get_branch_base_for_tip(A,X):2" >expect &&
test_all_modes get_branch_base_for_tip
'
test_expect_success 'get_branch_base_for_tip: equal to tip' '
# (2,3) branched from the first tip (i,4) in X with i > 2
cat >input <<-\EOF &&
A:commit-8-4
X:commit-1-2
X:commit-1-4
X:commit-4-4
X:commit-8-4
X:commit-10-4
EOF
echo "get_branch_base_for_tip(A,X):3" >expect &&
test_all_modes get_branch_base_for_tip
'
test_expect_success 'get_branch_base_for_tip: all reach tip' '
# (2,3) branched from the first tip (i,4) in X with i > 2
cat >input <<-\EOF &&
A:commit-4-1
X:commit-4-2
X:commit-5-1
EOF
echo "get_branch_base_for_tip(A,X):0" >expect &&
test_all_modes get_branch_base_for_tip
'
test_expect_success 'for-each-ref is-base: none reach' '
cat >input <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-4-2
refs/heads/commit-4-4
refs/heads/commit-8-4
EOF
cat >expect <<-\EOF &&
refs/heads/commit-1-1:
refs/heads/commit-4-2:(commit-2-3)
refs/heads/commit-4-4:
refs/heads/commit-8-4:
EOF
run_all_modes git for-each-ref \
--format="%(refname):%(is-base:commit-2-3)" --stdin
'
test_expect_success 'for-each-ref is-base: all reach' '
cat >input <<-\EOF &&
refs/heads/commit-4-2
refs/heads/commit-5-1
EOF
cat >expect <<-\EOF &&
refs/heads/commit-4-2:(commit-4-1)
refs/heads/commit-5-1:
EOF
run_all_modes git for-each-ref \
--format="%(refname):%(is-base:commit-4-1)" --stdin
'
test_expect_success 'for-each-ref is-base: equal to tip' '
cat >input <<-\EOF &&
refs/heads/commit-4-2
refs/heads/commit-5-1
EOF
cat >expect <<-\EOF &&
refs/heads/commit-4-2:(commit-4-2)
refs/heads/commit-5-1:
EOF
run_all_modes git for-each-ref \
--format="%(refname):%(is-base:commit-4-2)" --stdin
'
test_expect_success 'for-each-ref is-base:multiple' '
cat >input <<-\EOF &&
refs/heads/commit-1-1
refs/heads/commit-4-2
refs/heads/commit-4-4
refs/heads/commit-8-4
EOF
cat >expect <<-\EOF &&
refs/heads/commit-1-1[-]
refs/heads/commit-4-2[(commit-2-3)-]
refs/heads/commit-4-4[-]
refs/heads/commit-8-4[-(commit-6-5)]
EOF
run_all_modes git for-each-ref \
--format="%(refname)[%(is-base:commit-2-3)-%(is-base:commit-6-5)]" --stdin
'
test_done
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