#!/bin/sh

setvar test_description = ''test git rev-list --cherry-pick -- file''

source ./test-lib.sh

# A---B---D---F
#  \
#   \
#    C---E
#
# B changes a file foo.c, adding a line of text.  C changes foo.c as
# well as bar.c, but the change in foo.c was identical to change B.
# D and C change bar in the same way, E and F differently.

test_expect_success setup '
	echo Hallo > foo &&
	git add foo &&
	test_tick &&
	git commit -m "A" &&
	git tag A &&
	git checkout -b branch &&
	echo Bello > foo &&
	echo Cello > bar &&
	git add foo bar &&
	test_tick &&
	git commit -m "C" &&
	git tag C &&
	echo Dello > bar &&
	git add bar &&
	test_tick &&
	git commit -m "E" &&
	git tag E &&
	git checkout master &&
	git checkout branch foo &&
	test_tick &&
	git commit -m "B" &&
	git tag B &&
	echo Cello > bar &&
	git add bar &&
	test_tick &&
	git commit -m "D" &&
	git tag D &&
	echo Nello > bar &&
	git add bar &&
	test_tick &&
	git commit -m "F" &&
	git tag F
'

cat >expect <<< """
<tags/B
>tags/C
"""

test_expect_success '--left-right' '
	git rev-list --left-right B...C > actual &&
	git name-rev --stdin --name-only --refs="*tags/*" \
		< actual > actual.named &&
	test_cmp actual.named expect
'

test_expect_success '--count' '
	git rev-list --count B...C > actual &&
	test "$(cat actual)" = 2
'

test_expect_success '--cherry-pick foo comes up empty' '
	test -z "$(git rev-list --left-right --cherry-pick B...C -- foo)"
'

cat >expect <<< """
>tags/C
"""

test_expect_success '--cherry-pick bar does not come up empty' '
	git rev-list --left-right --cherry-pick B...C -- bar > actual &&
	git name-rev --stdin --name-only --refs="*tags/*" \
		< actual > actual.named &&
	test_cmp actual.named expect
'

test_expect_success 'bar does not come up empty' '
	git rev-list --left-right B...C -- bar > actual &&
	git name-rev --stdin --name-only --refs="*tags/*" \
		< actual > actual.named &&
	test_cmp actual.named expect
'

cat >expect <<< """
<tags/F
>tags/E
"""

test_expect_success '--cherry-pick bar does not come up empty (II)' '
	git rev-list --left-right --cherry-pick F...E -- bar > actual &&
	git name-rev --stdin --name-only --refs="*tags/*" \
		< actual > actual.named &&
	test_cmp actual.named expect
'

cat >expect <<< """
+tags/F
=tags/D
+tags/E
=tags/C
"""

test_expect_success '--cherry-mark' '
	git rev-list --cherry-mark F...E -- bar > actual &&
	git name-rev --stdin --name-only --refs="*tags/*" \
		< actual > actual.named &&
	test_cmp actual.named expect
'

cat >expect <<< """
<tags/F
=tags/D
>tags/E
=tags/C
"""

test_expect_success '--cherry-mark --left-right' '
	git rev-list --cherry-mark --left-right F...E -- bar > actual &&
	git name-rev --stdin --name-only --refs="*tags/*" \
		< actual > actual.named &&
	test_cmp actual.named expect
'

cat >expect <<< """
tags/E
"""

test_expect_success '--cherry-pick --right-only' '
	git rev-list --cherry-pick --right-only F...E -- bar > actual &&
	git name-rev --stdin --name-only --refs="*tags/*" \
		< actual > actual.named &&
	test_cmp actual.named expect
'

test_expect_success '--cherry-pick --left-only' '
	git rev-list --cherry-pick --left-only E...F -- bar > actual &&
	git name-rev --stdin --name-only --refs="*tags/*" \
		< actual > actual.named &&
	test_cmp actual.named expect
'

cat >expect <<< """
+tags/E
=tags/C
"""

test_expect_success '--cherry' '
	git rev-list --cherry F...E -- bar > actual &&
	git name-rev --stdin --name-only --refs="*tags/*" \
		< actual > actual.named &&
	test_cmp actual.named expect
'

cat >expect <<< """
1	1
"""

test_expect_success '--cherry --count' '
	git rev-list --cherry --count F...E -- bar > actual &&
	test_cmp actual expect
'

cat >expect <<< """
2	2
"""

test_expect_success '--cherry-mark --count' '
	git rev-list --cherry-mark --count F...E -- bar > actual &&
	test_cmp actual expect
'

cat >expect <<< """
1	1	2
"""

test_expect_success '--cherry-mark --left-right --count' '
	git rev-list --cherry-mark --left-right --count F...E -- bar > actual &&
	test_cmp actual expect
'

test_expect_success '--cherry-pick with independent, but identical branches' '
	git symbolic-ref HEAD refs/heads/independent &&
	rm .git/index &&
	echo Hallo > foo &&
	git add foo &&
	test_tick &&
	git commit -m "independent" &&
	echo Bello > foo &&
	test_tick &&
	git commit -m "independent, too" foo &&
	test -z "$(git rev-list --left-right --cherry-pick \
		HEAD...master -- foo)"
'

cat >expect <<< """
1	2
"""

test_expect_success '--count --left-right' '
	git rev-list --count --left-right C...D > actual &&
	test_cmp expect actual
'

# Corrupt the object store deliberately to make sure
# the object is not even checked for its existence.
proc remove_loose_object {
	setvar sha1 = "$(git rev-parse "$1")" &&
	setvar remainder = ${sha1#??} &&
	setvar firsttwo = ${sha1%$remainder} &&
	rm .git/objects/$firsttwo/$remainder
}

test_expect_success '--cherry-pick avoids looking at full diffs' '
	git checkout -b shy-diff &&
	test_commit dont-look-at-me &&
	echo Hello >dont-look-at-me.t &&
	test_tick &&
	git commit -m tip dont-look-at-me.t &&
	git checkout -b mainline HEAD^ &&
	test_commit to-cherry-pick &&
	remove_loose_object shy-diff^:dont-look-at-me.t &&
	git rev-list --cherry-pick ...shy-diff
'

test_done