git-commit-vandalism/t/t7110-reset-merge.sh
Stephan Beyer d0f379c2dc reset: use "unpack_trees()" directly instead of "git read-tree"
This patch makes "reset_index_file()" call "unpack_trees()" directly
instead of forking and execing "git read-tree". So the code is more
efficient.

And it's also easier to see which unpack_tree() options will be used,
as we don't need to follow "git read-tree"'s command line parsing
which is quite complex.

As Daniel Barkalow found, there is a difference between this new
version and the old one. The old version gives an error for
"git reset --merge" with unmerged entries, and the new version does
not when we reset the entries to some states that differ from HEAD.
Instead, it resets the index entry and succeeds, while leaving the
conflict markers in the corresponding file in the work tree (which
will be corrected by the next patch).

The code comes from the sequencer GSoC project:

git://repo.or.cz/git/sbeyer.git

(at commit 5a78908b70ceb5a4ea9fd4b82f07ceba1f019079)

Mentored-by: Daniel Barkalow <barkalow@iabervon.org>
Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Stephan Beyer <s-beyer@gmx.net>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-01-03 15:59:14 -08:00

162 lines
5.2 KiB
Bash
Executable File

#!/bin/sh
#
# Copyright (c) 2009 Christian Couder
#
test_description='Tests for "git reset --merge"'
. ./test-lib.sh
test_expect_success setup '
for i in 1 2 3; do echo line $i; done >file1 &&
cat file1 >file2 &&
git add file1 file2 &&
test_tick &&
git commit -m "Initial commit" &&
git tag initial &&
echo line 4 >>file1 &&
cat file1 >file2 &&
test_tick &&
git commit -m "add line 4 to file1" file1 &&
git tag second
'
# The next test will test the following:
#
# working index HEAD target working index HEAD
# ----------------------------------------------------
# file1: C C C D --merge D D D
# file2: C D D D --merge C D D
test_expect_success 'reset --merge is ok with changes in file it does not touch' '
git reset --merge HEAD^ &&
! grep 4 file1 &&
grep 4 file2 &&
test "$(git rev-parse HEAD)" = "$(git rev-parse initial)" &&
test -z "$(git diff --cached)"
'
test_expect_success 'reset --merge is ok when switching back' '
git reset --merge second &&
grep 4 file1 &&
grep 4 file2 &&
test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
test -z "$(git diff --cached)"
'
# The next test will test the following:
#
# working index HEAD target working index HEAD
# ----------------------------------------------------
# file1: B B C D --merge D D D
# file2: C D D D --merge C D D
test_expect_success 'reset --merge discards changes added to index (1)' '
git reset --hard second &&
cat file1 >file2 &&
echo "line 5" >> file1 &&
git add file1 &&
git reset --merge HEAD^ &&
! grep 4 file1 &&
! grep 5 file1 &&
grep 4 file2 &&
test "$(git rev-parse HEAD)" = "$(git rev-parse initial)" &&
test -z "$(git diff --cached)"
'
test_expect_success 'reset --merge is ok again when switching back (1)' '
git reset --hard initial &&
echo "line 5" >> file2 &&
git add file2 &&
git reset --merge second &&
! grep 4 file2 &&
! grep 5 file1 &&
grep 4 file1 &&
test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
test -z "$(git diff --cached)"
'
# The next test will test the following:
#
# working index HEAD target working index HEAD
# ----------------------------------------------------
# file1: C C C D --merge D D D
# file2: C C D D --merge D D D
test_expect_success 'reset --merge discards changes added to index (2)' '
git reset --hard second &&
echo "line 4" >> file2 &&
git add file2 &&
git reset --merge HEAD^ &&
! grep 4 file2 &&
test "$(git rev-parse HEAD)" = "$(git rev-parse initial)" &&
test -z "$(git diff)" &&
test -z "$(git diff --cached)"
'
test_expect_success 'reset --merge is ok again when switching back (2)' '
git reset --hard initial &&
git reset --merge second &&
! grep 4 file2 &&
grep 4 file1 &&
test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
test -z "$(git diff --cached)"
'
# The next test will test the following:
#
# working index HEAD target working index HEAD
# ----------------------------------------------------
# file1: A B B C --merge (disallowed)
test_expect_success 'reset --merge fails with changes in file it touches' '
git reset --hard second &&
echo "line 5" >> file1 &&
test_tick &&
git commit -m "add line 5" file1 &&
sed -e "s/line 1/changed line 1/" <file1 >file3 &&
mv file3 file1 &&
test_must_fail git reset --merge HEAD^ 2>err.log &&
grep file1 err.log | grep "not uptodate"
'
test_expect_success 'setup 2 different branches' '
git reset --hard second &&
git branch branch1 &&
git branch branch2 &&
git checkout branch1 &&
echo "line 5 in branch1" >> file1 &&
test_tick &&
git commit -a -m "change in branch1" &&
git checkout branch2 &&
echo "line 5 in branch2" >> file1 &&
test_tick &&
git commit -a -m "change in branch2" &&
git tag third
'
# The next test will test the following:
#
# working index HEAD target working index HEAD
# ----------------------------------------------------
# file1: X U B C --merge X C C
test_expect_success '"reset --merge HEAD^" is ok with pending merge' '
test_must_fail git merge branch1 &&
cat file1 >orig_file1 &&
git reset --merge HEAD^ &&
test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
test -z "$(git diff --cached)" &&
test_cmp file1 orig_file1
'
# The next test will test the following:
#
# working index HEAD target working index HEAD
# ----------------------------------------------------
# file1: X U B B --merge (disallowed)
test_expect_success '"reset --merge HEAD" fails with pending merge' '
git reset --hard third &&
test_must_fail git merge branch1 &&
test_must_fail git reset --merge HEAD &&
test "$(git rev-parse HEAD)" = "$(git rev-parse third)" &&
test -n "$(git diff --cached)"
'
test_done