#!/bin/sh

test_description='git repack works correctly'

. ./test-lib.sh

fsha1=
csha1=
tsha1=

test_expect_success '-A with -d option leaves unreachable objects unpacked' '
        echo content > file1 &&
        git add . &&
        test_tick &&
        git commit -m initial_commit &&
        # create a transient branch with unique content
        git checkout -b transient_branch &&
        echo more content >> file1 &&
        # record the objects created in the database for file, commit, tree
        fsha1=$(git hash-object file1) &&
        test_tick &&
        git commit -a -m more_content &&
        csha1=$(git rev-parse HEAD^{commit}) &&
        tsha1=$(git rev-parse HEAD^{tree}) &&
        git checkout master &&
        echo even more content >> file1 &&
        test_tick &&
        git commit -a -m even_more_content &&
        # delete the transient branch
        git branch -D transient_branch &&
        # pack the repo
        git repack -A -d -l &&
        # verify objects are packed in repository
        test 3 = $(git verify-pack -v -- .git/objects/pack/*.idx |
                   egrep "^($fsha1|$csha1|$tsha1) " |
                   sort | uniq | wc -l) &&
        git show $fsha1 &&
        git show $csha1 &&
        git show $tsha1 &&
        # now expire the reflog, while keeping reachable ones but expiring
        # unreachables immediately
        test_tick &&
        sometimeago=$(( $test_tick - 10000 )) &&
        git reflog expire --expire=$sometimeago --expire-unreachable=$test_tick --all &&
        # and repack
        git repack -A -d -l &&
        # verify objects are retained unpacked
        test 0 = $(git verify-pack -v -- .git/objects/pack/*.idx |
                   egrep "^($fsha1|$csha1|$tsha1) " |
                   sort | uniq | wc -l) &&
        git show $fsha1 &&
        git show $csha1 &&
        git show $tsha1
'

compare_mtimes ()
{
        read tref &&
        while read t; do
                test "$tref" = "$t" || return 1
        done
}

test_expect_success '-A without -d option leaves unreachable objects packed' '
        fsha1path=$(echo "$fsha1" | sed -e "s|\(..\)|\1/|") &&
        fsha1path=".git/objects/$fsha1path" &&
        csha1path=$(echo "$csha1" | sed -e "s|\(..\)|\1/|") &&
        csha1path=".git/objects/$csha1path" &&
        tsha1path=$(echo "$tsha1" | sed -e "s|\(..\)|\1/|") &&
        tsha1path=".git/objects/$tsha1path" &&
        git branch transient_branch $csha1 &&
        git repack -a -d -l &&
        test ! -f "$fsha1path" &&
        test ! -f "$csha1path" &&
        test ! -f "$tsha1path" &&
        test 1 = $(ls -1 .git/objects/pack/pack-*.pack | wc -l) &&
        packfile=$(ls .git/objects/pack/pack-*.pack) &&
        git branch -D transient_branch &&
        test_tick &&
        git repack -A -l &&
        test ! -f "$fsha1path" &&
        test ! -f "$csha1path" &&
        test ! -f "$tsha1path" &&
        git show $fsha1 &&
        git show $csha1 &&
        git show $tsha1
'

test_expect_success 'unpacked objects receive timestamp of pack file' '
        tmppack=".git/objects/pack/tmp_pack" &&
        ln "$packfile" "$tmppack" &&
        git repack -A -l -d &&
        test-tool chmtime --get "$tmppack" "$fsha1path" "$csha1path" "$tsha1path" \
                > mtimes &&
        compare_mtimes < mtimes
'

test_expect_success 'do not bother loosening old objects' '
        obj1=$(echo one | git hash-object -w --stdin) &&
        obj2=$(echo two | git hash-object -w --stdin) &&
        pack1=$(echo $obj1 | git pack-objects .git/objects/pack/pack) &&
        pack2=$(echo $obj2 | git pack-objects .git/objects/pack/pack) &&
        git prune-packed &&
        git cat-file -p $obj1 &&
        git cat-file -p $obj2 &&
        test-tool chmtime =-86400 .git/objects/pack/pack-$pack2.pack &&
        git repack -A -d --unpack-unreachable=1.hour.ago &&
        git cat-file -p $obj1 &&
        test_must_fail git cat-file -p $obj2
'

test_expect_success 'keep packed objects found only in index' '
        echo my-unique-content >file &&
        git add file &&
        git commit -m "make it reachable" &&
        git gc &&
        git reset HEAD^ &&
        git reflog expire --expire=now --all &&
        git add file &&
        test-tool chmtime =-86400 .git/objects/pack/* &&
        git gc --prune=1.hour.ago &&
        git cat-file blob :file
'

test_expect_success 'repack -k keeps unreachable packed objects' '
        # create packed-but-unreachable object
        sha1=$(echo unreachable-packed | git hash-object -w --stdin) &&
        pack=$(echo $sha1 | git pack-objects .git/objects/pack/pack) &&
        git prune-packed &&

        # -k should keep it
        git repack -adk &&
        git cat-file -p $sha1 &&

        # and double check that without -k it would have been removed
        git repack -ad &&
        test_must_fail git cat-file -p $sha1
'

test_expect_success 'repack -k packs unreachable loose objects' '
        # create loose unreachable object
        sha1=$(echo would-be-deleted-loose | git hash-object -w --stdin) &&
        objpath=.git/objects/$(echo $sha1 | sed "s,..,&/,") &&
        test_path_is_file $objpath &&

        # and confirm that the loose object goes away, but we can
        # still access it (ergo, it is packed)
        git repack -adk &&
        test_path_is_missing $objpath &&
        git cat-file -p $sha1
'

test_done