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The collect_parents() function now is responsible for
1. parsing the commits given on the command line into a list of
commits to be merged;
2. filtering these parents into independent ones; and
3. optionally calling fmt_merge_msg() via prepare_merge_message()
to prepare an auto-generated merge log message, using fake
contents that FETCH_HEAD would have had if these commits were
fetched from the current repository with "git pull . $args..."
Make "git merge FETCH_HEAD" to be the same as the traditional
git merge "$(git fmt-merge-msg <.git/FETCH_HEAD)" $commits
invocation of the command in "git pull", where $commits are the ones
that appear in FETCH_HEAD that are not marked as not-for-merge, by
making it do a bit more, specifically:
- noticing "FETCH_HEAD" is the only "commit" on the command line
and picking the commits that are not marked as not-for-merge as
the list of commits to be merged (substitute for step #1 above);
- letting the resulting list fed to step #2 above;
- doing the step #3 above, using the contents of the FETCH_HEAD
instead of fake contents crafted from the list of commits parsed
in the step #1 above.
Note that this changes the semantics. "git merge FETCH_HEAD" has
always behaved as if the first commit in the FETCH_HEAD file were
directly specified on the command line, creating a two-way merge
whose auto-generated merge log said "merge commit xyz". With this
change, if the previous fetch was to grab multiple branches (e.g.
"git fetch $there topic-a topic-b"), the new world order is to
create an octopus, behaving as if "git pull $there topic-a topic-b"
were run. This is a deliberate change to make that happen, and
can be seen in the changes to t3033 tests.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
136 lines
3.8 KiB
Bash
Executable file
136 lines
3.8 KiB
Bash
Executable file
#!/bin/sh
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test_description='"git merge" top-level frontend'
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. ./test-lib.sh
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t3033_reset () {
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git checkout -B master two &&
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git branch -f left three &&
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git branch -f right four
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}
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test_expect_success setup '
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test_commit one &&
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git branch left &&
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git branch right &&
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test_commit two &&
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git checkout left &&
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test_commit three &&
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git checkout right &&
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test_commit four &&
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git checkout master
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'
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# Local branches
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test_expect_success 'merge an octopus into void' '
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t3033_reset &&
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git checkout --orphan test &&
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git rm -fr . &&
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test_must_fail git merge left right &&
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test_must_fail git rev-parse --verify HEAD &&
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git diff --quiet &&
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test_must_fail git rev-parse HEAD
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'
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test_expect_success 'merge an octopus, fast-forward (ff)' '
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t3033_reset &&
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git reset --hard one &&
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git merge left right &&
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# one is ancestor of three (left) and four (right)
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test_must_fail git rev-parse --verify HEAD^3 &&
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git rev-parse HEAD^1 HEAD^2 | sort >actual &&
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git rev-parse three four | sort >expect &&
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test_cmp expect actual
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'
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test_expect_success 'merge octopus, non-fast-forward (ff)' '
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t3033_reset &&
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git reset --hard one &&
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git merge --no-ff left right &&
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# one is ancestor of three (left) and four (right)
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test_must_fail git rev-parse --verify HEAD^4 &&
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git rev-parse HEAD^1 HEAD^2 HEAD^3 | sort >actual &&
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git rev-parse one three four | sort >expect &&
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test_cmp expect actual
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'
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test_expect_success 'merge octopus, fast-forward (does not ff)' '
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t3033_reset &&
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git merge left right &&
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# two (master) is not an ancestor of three (left) and four (right)
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test_must_fail git rev-parse --verify HEAD^4 &&
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git rev-parse HEAD^1 HEAD^2 HEAD^3 | sort >actual &&
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git rev-parse two three four | sort >expect &&
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test_cmp expect actual
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'
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test_expect_success 'merge octopus, non-fast-forward' '
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t3033_reset &&
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git merge --no-ff left right &&
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test_must_fail git rev-parse --verify HEAD^4 &&
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git rev-parse HEAD^1 HEAD^2 HEAD^3 | sort >actual &&
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git rev-parse two three four | sort >expect &&
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test_cmp expect actual
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'
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# The same set with FETCH_HEAD
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test_expect_success 'merge FETCH_HEAD octopus into void' '
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t3033_reset &&
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git checkout --orphan test &&
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git rm -fr . &&
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git fetch . left right &&
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test_must_fail git merge FETCH_HEAD &&
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test_must_fail git rev-parse --verify HEAD &&
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git diff --quiet &&
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test_must_fail git rev-parse HEAD
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'
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test_expect_success 'merge FETCH_HEAD octopus fast-forward (ff)' '
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t3033_reset &&
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git reset --hard one &&
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git fetch . left right &&
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git merge FETCH_HEAD &&
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# one is ancestor of three (left) and four (right)
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test_must_fail git rev-parse --verify HEAD^3 &&
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git rev-parse HEAD^1 HEAD^2 | sort >actual &&
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git rev-parse three four | sort >expect &&
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test_cmp expect actual
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'
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test_expect_success 'merge FETCH_HEAD octopus non-fast-forward (ff)' '
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t3033_reset &&
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git reset --hard one &&
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git fetch . left right &&
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git merge --no-ff FETCH_HEAD &&
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# one is ancestor of three (left) and four (right)
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test_must_fail git rev-parse --verify HEAD^4 &&
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git rev-parse HEAD^1 HEAD^2 HEAD^3 | sort >actual &&
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git rev-parse one three four | sort >expect &&
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test_cmp expect actual
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'
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test_expect_success 'merge FETCH_HEAD octopus fast-forward (does not ff)' '
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t3033_reset &&
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git fetch . left right &&
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git merge FETCH_HEAD &&
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# two (master) is not an ancestor of three (left) and four (right)
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test_must_fail git rev-parse --verify HEAD^4 &&
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git rev-parse HEAD^1 HEAD^2 HEAD^3 | sort >actual &&
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git rev-parse two three four | sort >expect &&
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test_cmp expect actual
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'
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test_expect_success 'merge FETCH_HEAD octopus non-fast-forward' '
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t3033_reset &&
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git fetch . left right &&
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git merge --no-ff FETCH_HEAD &&
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test_must_fail git rev-parse --verify HEAD^4 &&
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git rev-parse HEAD^1 HEAD^2 HEAD^3 | sort >actual &&
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git rev-parse two three four | sort >expect &&
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test_cmp expect actual
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'
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test_done
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