git/t/t3431-rebase-fork-point.sh
Junio C Hamano f08132f889 rebase: --fork-point regression fix
"git rebase --fork-point master" used to work OK, as it internally
called "git merge-base --fork-point" that knew how to handle short
refname and dwim it to the full refname before calling the
underlying get_fork_point() function.

This is no longer true after the command was rewritten in C, as its
internall call made directly to get_fork_point() does not dwim a
short ref.

Move the "dwim the refname argument to the full refname" logic that
is used in "git merge-base" to the underlying get_fork_point()
function, so that the other caller of the function in the
implementation of "git rebase" behaves the same way to fix this
regression.

Signed-off-by: Alex Torok <alext9@gmail.com>
[jc: revamped the fix and used Alex's tests]
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-11 09:59:39 -08:00

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#!/bin/sh
#
# Copyright (c) 2019 Denton Liu
#
test_description='git rebase --fork-point test'
. ./test-lib.sh
# A---B---D---E (master)
# \
# C*---F---G (side)
#
# C was formerly part of master but master was rewound to remove C
#
test_expect_success setup '
test_commit A &&
test_commit B &&
test_commit C &&
git branch -t side &&
git reset --hard HEAD^ &&
test_commit D &&
test_commit E &&
git checkout side &&
test_commit F &&
test_commit G
'
test_rebase () {
expected="$1" &&
shift &&
test_expect_success "git rebase $*" "
git checkout master &&
git reset --hard E &&
git checkout side &&
git reset --hard G &&
git rebase $* &&
test_write_lines $expected >expect &&
git log --pretty=%s >actual &&
test_cmp expect actual
"
}
test_rebase 'G F E D B A'
test_rebase 'G F D B A' --onto D
test_rebase 'G F B A' --keep-base
test_rebase 'G F C E D B A' --no-fork-point
test_rebase 'G F C D B A' --no-fork-point --onto D
test_rebase 'G F C B A' --no-fork-point --keep-base
test_rebase 'G F E D B A' --fork-point refs/heads/master
test_rebase 'G F E D B A' --fork-point master
test_rebase 'G F D B A' --fork-point --onto D refs/heads/master
test_rebase 'G F D B A' --fork-point --onto D master
test_rebase 'G F B A' --fork-point --keep-base refs/heads/master
test_rebase 'G F B A' --fork-point --keep-base master
test_rebase 'G F C E D B A' refs/heads/master
test_rebase 'G F C E D B A' master
test_rebase 'G F C D B A' --onto D refs/heads/master
test_rebase 'G F C D B A' --onto D master
test_rebase 'G F C B A' --keep-base refs/heads/master
test_rebase 'G F C B A' --keep-base master
test_expect_success 'git rebase --fork-point with ambigous refname' '
git checkout master &&
git checkout -b one &&
git checkout side &&
git tag one &&
test_must_fail git rebase --fork-point --onto D one
'
test_done