tvl-depot/third_party/git/t/t3425-rebase-topology-merges.sh
Vincent Ambo f4609b896f merge(3p/git): Merge git subtree at v2.29.2
This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb
2020-11-21 19:45:56 +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