#!/bin/sh

test_description='push to a repository that borrows from elsewhere'

. ./test-lib.sh

test_expect_success setup '
        mkdir alice-pub &&
        (
                cd alice-pub &&
                GIT_DIR=. git init
        ) &&
        mkdir alice-work &&
        (
                cd alice-work &&
                git init &&
                >file &&
                git add . &&
                git commit -m initial &&
                git push ../alice-pub master
        ) &&

        # Project Bob is a fork of project Alice
        mkdir bob-pub &&
        (
                cd bob-pub &&
                GIT_DIR=. git init &&
                mkdir -p objects/info &&
                echo ../../alice-pub/objects >objects/info/alternates
        ) &&
        git clone alice-pub bob-work &&
        (
                cd bob-work &&
                git push ../bob-pub master
        )
'

test_expect_success 'alice works and pushes' '
        (
                cd alice-work &&
                echo more >file &&
                git commit -a -m second &&
                git push ../alice-pub
        )
'

test_expect_success 'bob fetches from alice, works and pushes' '
        (
                # Bob acquires what Alice did in his work tree first.
                # Even though these objects are not directly in
                # the public repository of Bob, this push does not
                # need to send the commit Bob received from Alice
                # to his public repository, as all the object Alice
                # has at her public repository are available to it
                # via its alternates.
                cd bob-work &&
                git pull ../alice-pub master &&
                echo more bob >file &&
                git commit -a -m third &&
                git push ../bob-pub
        ) &&

        # Check that the second commit by Alice is not sent
        # to ../bob-pub
        (
                cd bob-pub &&
                second=$(git rev-parse HEAD^) &&
                rm -f objects/info/alternates &&
                test_must_fail git cat-file -t $second &&
                echo ../../alice-pub/objects >objects/info/alternates
        )
'

test_expect_success 'clean-up in case the previous failed' '
        (
                cd bob-pub &&
                echo ../../alice-pub/objects >objects/info/alternates
        )
'

test_expect_success 'alice works and pushes again' '
        (
                # Alice does not care what Bob does.  She does not
                # even have to be aware of his existence.  She just
                # keeps working and pushing
                cd alice-work &&
                echo more alice >file &&
                git commit -a -m fourth &&
                git push ../alice-pub
        )
'

test_expect_success 'bob works and pushes' '
        (
                # This time Bob does not pull from Alice, and
                # the master branch at her public repository points
                # at a commit Bob does not know about.  This should
                # not prevent the push by Bob from succeeding.
                cd bob-work &&
                echo yet more bob >file &&
                git commit -a -m fifth &&
                git push ../bob-pub
        )
'

test_expect_success 'alice works and pushes yet again' '
        (
                # Alice does not care what Bob does.  She does not
                # even have to be aware of his existence.  She just
                # keeps working and pushing
                cd alice-work &&
                echo more and more alice >file &&
                git commit -a -m sixth.1 &&
                echo more and more alice >>file &&
                git commit -a -m sixth.2 &&
                echo more and more alice >>file &&
                git commit -a -m sixth.3 &&
                git push ../alice-pub
        )
'

test_expect_success 'bob works and pushes again' '
        (
                cd alice-pub &&
                git cat-file commit master >../bob-work/commit
        )
        (
                # This time Bob does not pull from Alice, and
                # the master branch at her public repository points
                # at a commit Bob does not fully know about, but
                # he happens to have the commit object (but not the
                # necessary tree) in his repository from Alice.
                # This should not prevent the push by Bob from
                # succeeding.
                cd bob-work &&
                git hash-object -t commit -w commit &&
                echo even more bob >file &&
                git commit -a -m seventh &&
                git push ../bob-pub
        )
'

test_done