#!/bin/sh

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

. ./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 <<EOF
<tags/B
>tags/C
EOF

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 <<EOF
>tags/C
EOF

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 <<EOF
<tags/F
>tags/E
EOF

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 <<EOF
+tags/F
=tags/D
+tags/E
=tags/C
EOF

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 <<EOF
<tags/F
=tags/D
>tags/E
=tags/C
EOF

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 <<EOF
tags/E
EOF

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 <<EOF
+tags/E
=tags/C
EOF

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 <<EOF
1       1
EOF

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

cat >expect <<EOF
2       2
EOF

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

cat >expect <<EOF
1       1       2
EOF

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 <<EOF
1       2
EOF

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.
remove_loose_object () {
        sha1="$(git rev-parse "$1")" &&
        remainder=${sha1#??} &&
        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