tvl-depot/third_party/git/t/t3425-rebase-topology-merges.sh
2020-05-22 17:46:45 +01:00

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#!/bin/sh
test_description='rebase topology tests with merges'
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-rebase.sh
test_revision_subjects () {
expected="$1"
shift
set -- $(git log --format=%s --no-walk=unsorted "$@")
test "$expected" = "$*"
}
# a---b-----------c
# \ \
# d-------e \
# \ \ \
# n---o---w---v
# \
# z
test_expect_success 'setup of non-linear-history' '
test_commit a &&
test_commit b &&
test_commit c &&
git checkout b &&
test_commit d &&
test_commit e &&
git checkout c &&
test_commit g &&
revert h g &&
git checkout d &&
cherry_pick gp g &&
test_commit i &&
git checkout b &&
test_commit f &&
git checkout d &&
test_commit n &&
test_commit o &&
test_merge w e &&
test_merge v c &&
git checkout o &&
test_commit z
'
test_run_rebase () {
result=$1
shift
test_expect_$result "rebase $* after merge from upstream" "
reset_rebase &&
git rebase $* e w &&
test_cmp_rev e HEAD~2 &&
test_linear_range 'n o' e..
"
}
test_run_rebase success --apply
test_run_rebase success -m
test_run_rebase success -i
test_run_rebase () {
result=$1
shift
expected=$1
shift
test_expect_$result "rebase $* of non-linear history is linearized in place" "
reset_rebase &&
git rebase $* d w &&
test_cmp_rev d HEAD~3 &&
test_linear_range "\'"$expected"\'" d..
"
}
test_run_rebase success 'n o e' --apply
test_run_rebase success 'n o e' -m
test_run_rebase success 'n o e' -i
test_run_rebase () {
result=$1
shift
expected=$1
shift
test_expect_$result "rebase $* of non-linear history is linearized upstream" "
reset_rebase &&
git rebase $* c w &&
test_cmp_rev c HEAD~4 &&
test_linear_range "\'"$expected"\'" c..
"
}
test_run_rebase success 'd n o e' --apply
test_run_rebase success 'd n o e' -m
test_run_rebase success 'd n o e' -i
test_run_rebase () {
result=$1
shift
expected=$1
shift
test_expect_$result "rebase $* of non-linear history with merges after upstream merge is linearized" "
reset_rebase &&
git rebase $* c v &&
test_cmp_rev c HEAD~4 &&
test_linear_range "\'"$expected"\'" c..
"
}
test_run_rebase success 'd n o e' --apply
test_run_rebase success 'd n o e' -m
test_run_rebase success 'd n o e' -i
if ! test_have_prereq REBASE_P; then
skip_all='skipping git rebase -p tests, as asked for'
test_done
fi
test_expect_success "rebase -p is no-op in non-linear history" "
reset_rebase &&
git rebase -p d w &&
test_cmp_rev w HEAD
"
test_expect_success "rebase -p is no-op when base inside second parent" "
reset_rebase &&
git rebase -p e w &&
test_cmp_rev w HEAD
"
test_expect_failure "rebase -p --root on non-linear history is a no-op" "
reset_rebase &&
git rebase -p --root w &&
test_cmp_rev w HEAD
"
test_expect_success "rebase -p re-creates merge from side branch" "
reset_rebase &&
git rebase -p z w &&
test_cmp_rev z HEAD^ &&
test_cmp_rev w^2 HEAD^2
"
test_expect_success "rebase -p re-creates internal merge" "
reset_rebase &&
git rebase -p c w &&
test_cmp_rev c HEAD~4 &&
test_cmp_rev HEAD^2^ HEAD~3 &&
test_revision_subjects 'd n e o w' HEAD~3 HEAD~2 HEAD^2 HEAD^ HEAD
"
test_expect_success "rebase -p can re-create two branches on onto" "
reset_rebase &&
git rebase -p --onto c d w &&
test_cmp_rev c HEAD~3 &&
test_cmp_rev c HEAD^2^ &&
test_revision_subjects 'n e o w' HEAD~2 HEAD^2 HEAD^ HEAD
"
# f
# /
# a---b---c---g---h
# \
# d---gp--i
# \ \
# e-------u
#
# gp = cherry-picked g
# h = reverted g
test_expect_success 'setup of non-linear-history for patch-equivalence tests' '
git checkout e &&
test_merge u i
'
test_expect_success "rebase -p re-creates history around dropped commit matching upstream" "
reset_rebase &&
git rebase -p h u &&
test_cmp_rev h HEAD~3 &&
test_cmp_rev HEAD^2^ HEAD~2 &&
test_revision_subjects 'd i e u' HEAD~2 HEAD^2 HEAD^ HEAD
"
test_expect_success "rebase -p --onto in merged history drops patches in upstream" "
reset_rebase &&
git rebase -p --onto f h u &&
test_cmp_rev f HEAD~3 &&
test_cmp_rev HEAD^2^ HEAD~2 &&
test_revision_subjects 'd i e u' HEAD~2 HEAD^2 HEAD^ HEAD
"
test_expect_success "rebase -p --onto in merged history does not drop patches in onto" "
reset_rebase &&
git rebase -p --onto h f u &&
test_cmp_rev h HEAD~3 &&
test_cmp_rev HEAD^2~2 HEAD~2 &&
test_revision_subjects 'd gp i e u' HEAD~2 HEAD^2^ HEAD^2 HEAD^ HEAD
"
# a---b---c---g---h
# \
# d---gp--s
# \ \ /
# \ X
# \ / \
# e---t
#
# gp = cherry-picked g
# h = reverted g
test_expect_success 'setup of non-linear-history for dropping whole side' '
git checkout gp &&
test_merge s e &&
git checkout e &&
test_merge t gp
'
test_expect_failure "rebase -p drops merge commit when entire first-parent side is dropped" "
reset_rebase &&
git rebase -p h s &&
test_cmp_rev h HEAD~2 &&
test_linear_range 'd e' h..
"
test_expect_success "rebase -p drops merge commit when entire second-parent side is dropped" "
reset_rebase &&
git rebase -p h t &&
test_cmp_rev h HEAD~2 &&
test_linear_range 'd e' h..
"
# a---b---c
# \
# d---e
# \ \
# n---r
# \
# o
#
# r = tree-same with n
test_expect_success 'setup of non-linear-history for empty commits' '
git checkout n &&
git merge --no-commit e &&
git reset n . &&
git commit -m r &&
git reset --hard &&
git clean -f &&
git tag r
'
test_expect_success "rebase -p re-creates empty internal merge commit" "
reset_rebase &&
git rebase -p c r &&
test_cmp_rev c HEAD~3 &&
test_cmp_rev HEAD^2^ HEAD~2 &&
test_revision_subjects 'd e n r' HEAD~2 HEAD^2 HEAD^ HEAD
"
test_expect_success "rebase -p re-creates empty merge commit" "
reset_rebase &&
git rebase -p o r &&
test_cmp_rev e HEAD^2 &&
test_cmp_rev o HEAD^ &&
test_revision_subjects 'r' HEAD
"
test_done