#!/bin/sh
#
# Copyright (c) 2005 Johannes Schindelin
#

test_description='Testing multi_ack pack fetching'

. ./test-lib.sh

# Test fetch-pack/upload-pack pair.

# Some convenience functions

add () {
        name=$1 &&
        text="$@" &&
        branch=`echo $name | sed -e 's/^\(.\).*$/\1/'` &&
        parents="" &&

        shift &&
        while test $1; do
                parents="$parents -p $1" &&
                shift
        done &&

        echo "$text" > test.txt &&
        git update-index --add test.txt &&
        tree=$(git write-tree) &&
        # make sure timestamps are in correct order
        test_tick &&
        commit=$(echo "$text" | git commit-tree $tree $parents) &&
        eval "$name=$commit; export $name" &&
        echo $commit > .git/refs/heads/$branch &&
        eval ${branch}TIP=$commit
}

pull_to_client () {
        number=$1 &&
        heads=$2 &&
        count=$3 &&
        test_expect_success "$number pull" '
                (
                        cd client &&
                        git fetch-pack -k -v .. $heads &&

                        case "$heads" in
                            *A*)
                                    echo $ATIP > .git/refs/heads/A;;
                        esac &&
                        case "$heads" in *B*)
                            echo $BTIP > .git/refs/heads/B;;
                        esac &&
                        git symbolic-ref HEAD refs/heads/`echo $heads \
                                | sed -e "s/^\(.\).*$/\1/"` &&

                        git fsck --full &&

                        mv .git/objects/pack/pack-* . &&
                        p=`ls -1 pack-*.pack` &&
                        git unpack-objects <$p &&
                        git fsck --full &&

                        idx=`echo pack-*.idx` &&
                        pack_count=`git show-index <$idx | wc -l` &&
                        test $pack_count = $count &&
                        rm -f pack-*
                )
        '
}

# Here begins the actual testing

# A1 - ... - A20 - A21
#    \
#      B1  -   B2 - .. - B70

# client pulls A20, B1. Then tracks only B. Then pulls A.

test_expect_success 'setup' '
        mkdir client &&
        (
                cd client &&
                git init &&
                git config transfer.unpacklimit 0
        ) &&
        add A1 &&
        prev=1 &&
        cur=2 &&
        while [ $cur -le 10 ]; do
                add A$cur $(eval echo \$A$prev) &&
                prev=$cur &&
                cur=$(($cur+1))
        done &&
        add B1 $A1
        echo $ATIP > .git/refs/heads/A &&
        echo $BTIP > .git/refs/heads/B &&
        git symbolic-ref HEAD refs/heads/B
'

pull_to_client 1st "B A" $((11*3))

test_expect_success 'post 1st pull setup' '
        add A11 $A10 &&
        prev=1 &&
        cur=2 &&
        while [ $cur -le 65 ]; do
                add B$cur $(eval echo \$B$prev) &&
                prev=$cur &&
                cur=$(($cur+1))
        done
'

pull_to_client 2nd "B" $((64*3))

pull_to_client 3rd "A" $((1*3))

test_expect_success 'clone shallow' '
        git clone --depth 2 "file://$(pwd)/." shallow
'

test_expect_success 'clone shallow object count' '
        (
                cd shallow &&
                git count-objects -v
        ) > count.shallow &&
        grep "^in-pack: 18" count.shallow
'

test_expect_success 'clone shallow object count (part 2)' '
        sed -e "/^in-pack:/d" -e "/^packs:/d" -e "/^size-pack:/d" \
            -e "/: 0$/d" count.shallow > count_output &&
        ! test -s count_output
'

test_expect_success 'fsck in shallow repo' '
        (
                cd shallow &&
                git fsck --full
        )
'

test_expect_success 'simple fetch in shallow repo' '
        (
                cd shallow &&
                git fetch
        )
'

test_expect_success 'no changes expected' '
        (
                cd shallow &&
                git count-objects -v
        ) > count.shallow.2 &&
        cmp count.shallow count.shallow.2
'

test_expect_success 'fetch same depth in shallow repo' '
        (
                cd shallow &&
                git fetch --depth=2
        )
'

test_expect_success 'no changes expected' '
        (
                cd shallow &&
                git count-objects -v
        ) > count.shallow.3 &&
        cmp count.shallow count.shallow.3
'

test_expect_success 'add two more' '
        add B66 $B65 &&
        add B67 $B66
'

test_expect_success 'pull in shallow repo' '
        (
                cd shallow &&
                git pull .. B
        )
'

test_expect_success 'clone shallow object count' '
        (
                cd shallow &&
                git count-objects -v
        ) > count.shallow &&
        grep "^count: 6" count.shallow
'

test_expect_success 'add two more (part 2)' '
        add B68 $B67 &&
        add B69 $B68
'

test_expect_success 'deepening pull in shallow repo' '
        (
                cd shallow &&
                git pull --depth 4 .. B
        )
'

test_expect_success 'clone shallow object count' '
        (
                cd shallow &&
                git count-objects -v
        ) > count.shallow &&
        grep "^count: 12" count.shallow
'

test_expect_success 'deepening fetch in shallow repo' '
        (
                cd shallow &&
                git fetch --depth 4 .. A:A
        )
'

test_expect_success 'clone shallow object count' '
        (
                cd shallow &&
                git count-objects -v
        ) > count.shallow &&
        grep "^count: 18" count.shallow
'

test_expect_success 'pull in shallow repo with missing merge base' '
        (
                cd shallow &&
                test_must_fail git pull --depth 4 .. A
        )
'

test_expect_success 'additional simple shallow deepenings' '
        (
                cd shallow &&
                git fetch --depth=8 &&
                git fetch --depth=10 &&
                git fetch --depth=11
        )
'

test_expect_success 'clone shallow object count' '
        (
                cd shallow &&
                git count-objects -v
        ) > count.shallow &&
        grep "^count: 52" count.shallow
'

test_done