#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#

test_description='See why rewinding head breaks send-pack

'
. ./test-lib.sh

cnt=64
test_expect_success setup '
        test_tick &&
        mkdir mozart mozart/is &&
        echo "Commit #0" >mozart/is/pink &&
        git update-index --add mozart/is/pink &&
        tree=$(git write-tree) &&
        commit=$(echo "Commit #0" | git commit-tree $tree) &&
        zero=$commit &&
        parent=$zero &&
        i=0 &&
        while test $i -le $cnt
        do
            i=$(($i+1)) &&
            test_tick &&
            echo "Commit #$i" >mozart/is/pink &&
            git update-index --add mozart/is/pink &&
            tree=$(git write-tree) &&
            commit=$(echo "Commit #$i" | git commit-tree $tree -p $parent) &&
            git update-ref refs/tags/commit$i $commit &&
            parent=$commit || return 1
        done &&
        git update-ref HEAD "$commit" &&
        git clone ./. victim &&
        cd victim &&
        git log &&
        cd .. &&
        git update-ref HEAD "$zero" &&
        parent=$zero &&
        i=0 &&
        while test $i -le $cnt
        do
            i=$(($i+1)) &&
            test_tick &&
            echo "Rebase #$i" >mozart/is/pink &&
            git update-index --add mozart/is/pink &&
            tree=$(git write-tree) &&
            commit=$(echo "Rebase #$i" | git commit-tree $tree -p $parent) &&
            git update-ref refs/tags/rebase$i $commit &&
            parent=$commit || return 1
        done &&
        git update-ref HEAD "$commit" &&
        echo Rebase &&
        git log'

test_expect_success 'pack the source repository' '
        git repack -a -d &&
        git prune
'

test_expect_success 'pack the destination repository' '
        cd victim &&
        git repack -a -d &&
        git prune &&
        cd ..
'

test_expect_success \
        'pushing rewound head should not barf but require --force' '
        # should not fail but refuse to update.
        if git send-pack ./victim/.git/ master
        then
                # now it should fail with Pasky patch
                echo >&2 Gaah, it should have failed.
                false
        else
                echo >&2 Thanks, it correctly failed.
                true
        fi &&
        if cmp victim/.git/refs/heads/master .git/refs/heads/master
        then
                # should have been left as it was!
                false
        else
                true
        fi &&
        # this should update
        git send-pack --force ./victim/.git/ master &&
        cmp victim/.git/refs/heads/master .git/refs/heads/master
'

test_expect_success \
        'push can be used to delete a ref' '
        cd victim &&
        git branch extra master &&
        cd .. &&
        test -f victim/.git/refs/heads/extra &&
        git send-pack ./victim/.git/ :extra master &&
        ! test -f victim/.git/refs/heads/extra
'

unset GIT_CONFIG GIT_CONFIG_LOCAL
HOME=`pwd`/no-such-directory
export HOME ;# this way we force the victim/.git/config to be used.

test_expect_success \
        'pushing with --force should be denied with denyNonFastforwards' '
        cd victim &&
        git config receive.denyNonFastforwards true &&
        cd .. &&
        git update-ref refs/heads/master master^ || return 1
        git send-pack --force ./victim/.git/ master && return 1
        ! test_cmp .git/refs/heads/master victim/.git/refs/heads/master
'

test_expect_success \
        'pushing does not include non-head refs' '
        mkdir parent && cd parent &&
        git init && touch file && git add file && git commit -m add &&
        cd .. &&
        git clone parent child && cd child && git push --all &&
        cd ../parent &&
        git branch -a >branches && ! grep origin/master branches
'

rewound_push_setup() {
        rm -rf parent child &&
        mkdir parent && cd parent &&
        git init && echo one >file && git add file && git commit -m one &&
        echo two >file && git commit -a -m two &&
        cd .. &&
        git clone parent child && cd child && git reset --hard HEAD^
}

rewound_push_succeeded() {
        cmp ../parent/.git/refs/heads/master .git/refs/heads/master
}

rewound_push_failed() {
        if rewound_push_succeeded
        then
                false
        else
                true
        fi
}

test_expect_success \
        'pushing explicit refspecs respects forcing' '
        rewound_push_setup &&
        if git send-pack ../parent/.git refs/heads/master:refs/heads/master
        then
                false
        else
                true
        fi && rewound_push_failed &&
        git send-pack ../parent/.git +refs/heads/master:refs/heads/master &&
        rewound_push_succeeded
'

test_expect_success \
        'pushing wildcard refspecs respects forcing' '
        rewound_push_setup &&
        if git send-pack ../parent/.git refs/heads/*:refs/heads/*
        then
                false
        else
                true
        fi && rewound_push_failed &&
        git send-pack ../parent/.git +refs/heads/*:refs/heads/* &&
        rewound_push_succeeded
'

test_done