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40d71940b6
If read_tree_trivial() succeeds and produces a tree that is already
in the object store, then the index is not written to disk, leaving
it out-of-sync with both HEAD and the working tree.
In order to write the index back out to disk after a merge,
write_index_locked() needs to be called. For most merge strategies, this
is done from try_merge_strategy(). For fast forward updates, this is
done from checkout_fast_forward(). When trivial merges work, the call to
write_index_locked() is buried a little deeper:
merge_trivial()
-> write_tree_trivial()
-> write_cache_as_tree()
-> write_index_as_tree()
-> write_locked_index()
However, it is only called when !cache_tree_fully_valid(), which is how
this bug is triggered. But that also shows why this bug doesn't affect
any other merge strategies or cases.
Add a direct call to write_index_locked() from merge_trivial() to fix
this issue. Since the indirect call to write_locked_index() was
conditional on cache_tree_fully_valid(), it won't be written twice.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
52 lines
1.1 KiB
Bash
Executable file
52 lines
1.1 KiB
Bash
Executable file
#!/bin/sh
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test_description='git merge
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Testing the resolve strategy.'
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. ./test-lib.sh
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test_expect_success 'setup' '
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echo c0 > c0.c &&
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git add c0.c &&
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git commit -m c0 &&
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git tag c0 &&
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echo c1 > c1.c &&
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git add c1.c &&
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git commit -m c1 &&
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git tag c1 &&
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git reset --hard c0 &&
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echo c2 > c2.c &&
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git add c2.c &&
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git commit -m c2 &&
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git tag c2 &&
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git reset --hard c0 &&
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echo c3 > c2.c &&
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git add c2.c &&
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git commit -m c3 &&
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git tag c3
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'
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merge_c1_to_c2_cmds='
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git reset --hard c1 &&
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git merge -s resolve c2 &&
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test "$(git rev-parse c1)" != "$(git rev-parse HEAD)" &&
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test "$(git rev-parse c1)" = "$(git rev-parse HEAD^1)" &&
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test "$(git rev-parse c2)" = "$(git rev-parse HEAD^2)" &&
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git diff --exit-code &&
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test -f c0.c &&
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test -f c1.c &&
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test -f c2.c &&
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test 3 = $(git ls-tree -r HEAD | wc -l) &&
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test 3 = $(git ls-files | wc -l)
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'
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test_expect_success 'merge c1 to c2' "$merge_c1_to_c2_cmds"
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test_expect_success 'merge c1 to c2, again' "$merge_c1_to_c2_cmds"
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test_expect_success 'merge c2 to c3 (fails)' '
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git reset --hard c2 &&
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test_must_fail git merge -s resolve c3
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'
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test_done
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