#!/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 "$commit" &&
        git clone ./. victim &&
        ( cd victim && git config receive.denyCurrentBranch warn && git log ) &&
        git update-ref HEAD "$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
    )
'

test_expect_success 'refuse pushing rewound head without --force' '
        pushed_head=$(git rev-parse --verify master) &&
        victim_orig=$(cd victim && git rev-parse --verify master) &&
        test_must_fail git send-pack ./victim master &&
        victim_head=$(cd victim && git rev-parse --verify master) &&
        test "$victim_head" = "$victim_orig" &&
        # this should update
        git send-pack --force ./victim master &&
        victim_head=$(cd victim && git rev-parse --verify master) &&
        test "$victim_head" = "$pushed_head"
'

test_expect_success 'push can be used to delete a ref' '
        ( cd victim && git branch extra master ) &&
        git send-pack ./victim :extra master &&
        ( cd victim &&
          test_must_fail git rev-parse --verify extra )
'

test_expect_success 'refuse deleting push with denyDeletes' '
        (
            cd victim &&
            ( git branch -D extra || : ) &&
            git config receive.denyDeletes true &&
            git branch extra master
        ) &&
        test_must_fail git send-pack ./victim :extra master
'

test_expect_success 'cannot override denyDeletes with git -c send-pack' '
        (
                cd victim &&
                test_might_fail git branch -D extra &&
                git config receive.denyDeletes true &&
                git branch extra master
        ) &&
        test_must_fail git -c receive.denyDeletes=false \
                                        send-pack ./victim :extra master
'

test_expect_success 'override denyDeletes with git -c receive-pack' '
        (
                cd victim &&
                test_might_fail git branch -D extra &&
                git config receive.denyDeletes true &&
                git branch extra master
        ) &&
        git send-pack \
                --receive-pack="git -c receive.denyDeletes=false receive-pack" \
                ./victim :extra master
'

test_expect_success 'denyNonFastforwards trumps --force' '
        (
            cd victim &&
            ( git branch -D extra || : ) &&
            git config receive.denyNonFastforwards true
        ) &&
        victim_orig=$(cd victim && git rev-parse --verify master) &&
        test_must_fail git send-pack --force ./victim master^:master &&
        victim_head=$(cd victim && git rev-parse --verify master) &&
        test "$victim_orig" = "$victim_head"
'

test_expect_success 'send-pack --all sends all branches' '
        # make sure we have at least 2 branches with different
        # values, just to be thorough
        git branch other-branch HEAD^ &&

        git init --bare all.git &&
        git send-pack --all all.git &&
        git for-each-ref refs/heads >expect &&
        git -C all.git for-each-ref refs/heads >actual &&
        test_cmp expect actual
'

test_expect_success 'push --all excludes remote-tracking hierarchy' '
        mkdir parent &&
        (
            cd parent &&
            git init && : >file && git add file && git commit -m add
        ) &&
        git clone parent child &&
        (
            cd child && git push --all
        ) &&
        (
            cd parent &&
            test -z "$(git for-each-ref refs/remotes/origin)"
        )
'

test_expect_success 'receive-pack runs auto-gc in remote repo' '
        rm -rf parent child &&
        git init parent &&
        (
            # Setup a repo with 2 packs
            cd parent &&
            echo "Some text" >file.txt &&
            git add . &&
            git commit -m "Initial commit" &&
            git repack -adl &&
            echo "Some more text" >>file.txt &&
            git commit -a -m "Second commit" &&
            git repack
        ) &&
        cp -R parent child &&
        (
            # Set the child to auto-pack if more than one pack exists
            cd child &&
            git config gc.autopacklimit 1 &&
            git config gc.autodetach false &&
            git branch test_auto_gc &&
            # And create a file that follows the temporary object naming
            # convention for the auto-gc to remove
            : >.git/objects/tmp_test_object &&
            test-chmtime =-1209601 .git/objects/tmp_test_object
        ) &&
        (
            cd parent &&
            echo "Even more text" >>file.txt &&
            git commit -a -m "Third commit" &&
            git send-pack ../child HEAD:refs/heads/test_auto_gc
        ) &&
        test ! -e child/.git/objects/tmp_test_object
'

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

test_expect_success 'pushing explicit refspecs respects forcing' '
        rewound_push_setup &&
        parent_orig=$(cd parent && git rev-parse --verify master) &&
        (
            cd child &&
            test_must_fail git send-pack ../parent \
                refs/heads/master:refs/heads/master
        ) &&
        parent_head=$(cd parent && git rev-parse --verify master) &&
        test "$parent_orig" = "$parent_head" &&
        (
            cd child &&
            git send-pack ../parent \
                +refs/heads/master:refs/heads/master
        ) &&
        parent_head=$(cd parent && git rev-parse --verify master) &&
        child_head=$(cd child && git rev-parse --verify master) &&
        test "$parent_head" = "$child_head"
'

test_expect_success 'pushing wildcard refspecs respects forcing' '
        rewound_push_setup &&
        parent_orig=$(cd parent && git rev-parse --verify master) &&
        (
            cd child &&
            test_must_fail git send-pack ../parent \
                "refs/heads/*:refs/heads/*"
        ) &&
        parent_head=$(cd parent && git rev-parse --verify master) &&
        test "$parent_orig" = "$parent_head" &&
        (
            cd child &&
            git send-pack ../parent \
                "+refs/heads/*:refs/heads/*"
        ) &&
        parent_head=$(cd parent && git rev-parse --verify master) &&
        child_head=$(cd child && git rev-parse --verify master) &&
        test "$parent_head" = "$child_head"
'

test_expect_success 'deny pushing to delete current branch' '
        rewound_push_setup &&
        (
            cd child &&
            test_must_fail git send-pack ../parent :refs/heads/master 2>errs
        )
'

extract_ref_advertisement () {
        perl -lne '
                # \\ is there to skip capabilities after \0
                /push< ([^\\]+)/ or next;
                exit 0 if $1 eq "0000";
                print $1;
        '
}

test_expect_success 'receive-pack de-dupes .have lines' '
        git init shared &&
        git -C shared commit --allow-empty -m both &&
        git clone -s shared fork &&
        (
                cd shared &&
                git checkout -b only-shared &&
                git commit --allow-empty -m only-shared &&
                git update-ref refs/heads/foo HEAD
        ) &&

        # Notable things in this expectation:
        #  - local refs are not de-duped
        #  - .have does not duplicate locals
        #  - .have does not duplicate itself
        local=$(git -C fork rev-parse HEAD) &&
        shared=$(git -C shared rev-parse only-shared) &&
        cat >expect <<-EOF &&
        $local refs/heads/master
        $local refs/remotes/origin/HEAD
        $local refs/remotes/origin/master
        $shared .have
        EOF

        GIT_TRACE_PACKET=$(pwd)/trace git push fork HEAD:foo &&
        extract_ref_advertisement <trace >refs &&
        test_cmp expect refs
'

test_done