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git/t/t3400-rebase.sh
Johannes Sixt 1308c17b3e Allow rebase to run if upstream is completely merged
Consider this history:

  o--o-...-B          <- origin
      \     \
       x--x--M--x--x  <- master

In this situation, rebase considers master fully up-to-date and would
not do anything. However, if there were additional commits on origin,
the rebase would run and move the commits x on top of origin.

Here we change rebase to short-circuit out only if the history since origin
is strictly linear. Consequently, the above as well as a history like this
would be linearized:

  o--o               <- origin
      \
       x--x
        \  \
         x--M--x--x  <- master

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-07-04 21:12:39 -07:00

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#!/bin/sh
#
# Copyright (c) 2005 Amos Waterland
#
test_description='git rebase should not destroy author information
This test runs git rebase and checks that the author information is not lost.
'
. ./test-lib.sh
export GIT_AUTHOR_EMAIL=bogus_email_address
test_expect_success \
'prepare repository with topic branches' \
'echo First > A &&
git update-index --add A &&
git-commit -m "Add A." &&
git checkout -b my-topic-branch &&
echo Second > B &&
git update-index --add B &&
git-commit -m "Add B." &&
git checkout -f master &&
echo Third >> A &&
git update-index A &&
git-commit -m "Modify A." &&
git checkout -b side my-topic-branch &&
echo Side >> C &&
git add C &&
git commit -m "Add C" &&
git checkout -b nonlinear my-topic-branch &&
echo Edit >> B &&
git add B &&
git commit -m "Modify B" &&
git merge side &&
git checkout -b upstream-merged-nonlinear &&
git merge master &&
git checkout -f my-topic-branch &&
git tag topic
'
test_expect_success 'rebase against master' '
git rebase master'
test_expect_failure \
'the rebase operation should not have destroyed author information' \
'git log | grep "Author:" | grep "<>"'
test_expect_success 'rebase after merge master' '
git reset --hard topic &&
git merge master &&
git rebase master &&
! git show | grep "^Merge:"
'
test_expect_success 'rebase of history with merges is linearized' '
git checkout nonlinear &&
test 4 = $(git rev-list master.. | wc -l) &&
git rebase master &&
test 3 = $(git rev-list master.. | wc -l)
'
test_expect_success \
'rebase of history with merges after upstream merge is linearized' '
git checkout upstream-merged-nonlinear &&
test 5 = $(git rev-list master.. | wc -l) &&
git rebase master &&
test 3 = $(git rev-list master.. | wc -l)
'
test_done