#!/bin/sh

test_description='git repack works correctly'

. ./test-lib.sh

test_expect_success 'objects in packs marked .keep are not repacked' '
        echo content1 > file1 &&
        echo content2 > file2 &&
        git add . &&
        git commit -m initial_commit &&
        # Create two packs
        # The first pack will contain all of the objects except one
        git rev-list --objects --all | grep -v file2 |
                git pack-objects pack > /dev/null &&
        # The second pack will contain the excluded object
        packsha1=$(git rev-list --objects --all | grep file2 |
                git pack-objects pack) &&
        touch -r pack-$packsha1.pack pack-$packsha1.keep &&
        objsha1=$(git verify-pack -v pack-$packsha1.idx | head -n 1 |
                sed -e "s/^\([0-9a-f]\{40\}\).*/\1/") &&
        mv pack-* .git/objects/pack/ &&
        git repack -A -d -l &&
        git prune-packed &&
        for p in .git/objects/pack/*.idx; do
                idx=$(basename $p)
                test "pack-$packsha1.idx" = "$idx" && continue
                if git verify-pack -v $p | egrep "^$objsha1"; then
                        found_duplicate_object=1
                        echo "DUPLICATE OBJECT FOUND"
                        break
                fi
        done &&
        test -z "$found_duplicate_object"
'

test_expect_success 'loose objects in alternate ODB are not repacked' '
        mkdir alt_objects &&
        echo `pwd`/alt_objects > .git/objects/info/alternates &&
        echo content3 > file3 &&
        objsha1=$(GIT_OBJECT_DIRECTORY=alt_objects git hash-object -w file3) &&
        git add file3 &&
        git commit -m commit_file3 &&
        git repack -a -d -l &&
        git prune-packed &&
        for p in .git/objects/pack/*.idx; do
                if git verify-pack -v $p | egrep "^$objsha1"; then
                        found_duplicate_object=1
                        echo "DUPLICATE OBJECT FOUND"
                        break
                fi
        done &&
        test -z "$found_duplicate_object"
'

test_expect_success 'packed obs in alt ODB are repacked even when local repo is packless' '
        mkdir alt_objects/pack
        mv .git/objects/pack/* alt_objects/pack &&
        git repack -a &&
        myidx=$(ls -1 .git/objects/pack/*.idx) &&
        test -f "$myidx" &&
        for p in alt_objects/pack/*.idx; do
                git verify-pack -v $p | sed -n -e "/^[0-9a-f]\{40\}/p"
        done | while read sha1 rest; do
                if ! ( git verify-pack -v $myidx | grep "^$sha1" ); then
                        echo "Missing object in local pack: $sha1"
                        return 1
                fi
        done
'

test_expect_success 'packed obs in alt ODB are repacked when local repo has packs' '
        rm -f .git/objects/pack/* &&
        echo new_content >> file1 &&
        git add file1 &&
        git commit -m more_content &&
        git repack &&
        git repack -a -d &&
        myidx=$(ls -1 .git/objects/pack/*.idx) &&
        test -f "$myidx" &&
        for p in alt_objects/pack/*.idx; do
                git verify-pack -v $p | sed -n -e "/^[0-9a-f]\{40\}/p"
        done | while read sha1 rest; do
                if ! ( git verify-pack -v $myidx | grep "^$sha1" ); then
                        echo "Missing object in local pack: $sha1"
                        return 1
                fi
        done
'

test_expect_success 'packed obs in alternate ODB kept pack are repacked' '
        # swap the .keep so the commit object is in the pack with .keep
        for p in alt_objects/pack/*.pack
        do
                base_name=$(basename $p .pack)
                if test -f alt_objects/pack/$base_name.keep
                then
                        rm alt_objects/pack/$base_name.keep
                else
                        touch alt_objects/pack/$base_name.keep
                fi
        done
        git repack -a -d &&
        myidx=$(ls -1 .git/objects/pack/*.idx) &&
        test -f "$myidx" &&
        for p in alt_objects/pack/*.idx; do
                git verify-pack -v $p | sed -n -e "/^[0-9a-f]\{40\}/p"
        done | while read sha1 rest; do
                if ! ( git verify-pack -v $myidx | grep "^$sha1" ); then
                        echo "Missing object in local pack: $sha1"
                        return 1
                fi
        done
'

test_expect_success 'packed unreachable obs in alternate ODB are not loosened' '
        rm -f alt_objects/pack/*.keep &&
        mv .git/objects/pack/* alt_objects/pack/ &&
        csha1=$(git rev-parse HEAD^{commit}) &&
        git reset --hard HEAD^ &&
        sleep 1 &&
        git reflog expire --expire=now --expire-unreachable=now --all &&
        # The pack-objects call on the next line is equivalent to
        # git repack -A -d without the call to prune-packed
        git pack-objects --honor-pack-keep --non-empty --all --reflog \
            --unpack-unreachable </dev/null pack &&
        rm -f .git/objects/pack/* &&
        mv pack-* .git/objects/pack/ &&
        test 0 = $(git verify-pack -v -- .git/objects/pack/*.idx |
                egrep "^$csha1 " | sort | uniq | wc -l) &&
        echo > .git/objects/info/alternates &&
        test_must_fail git show $csha1
'

test_expect_success 'local packed unreachable obs that exist in alternate ODB are not loosened' '
        echo `pwd`/alt_objects > .git/objects/info/alternates &&
        echo "$csha1" | git pack-objects --non-empty --all --reflog pack &&
        rm -f .git/objects/pack/* &&
        mv pack-* .git/objects/pack/ &&
        # The pack-objects call on the next line is equivalent to
        # git repack -A -d without the call to prune-packed
        git pack-objects --honor-pack-keep --non-empty --all --reflog \
            --unpack-unreachable </dev/null pack &&
        rm -f .git/objects/pack/* &&
        mv pack-* .git/objects/pack/ &&
        test 0 = $(git verify-pack -v -- .git/objects/pack/*.idx |
                egrep "^$csha1 " | sort | uniq | wc -l) &&
        echo > .git/objects/info/alternates &&
        test_must_fail git show $csha1
'

test_done