94 lines
3.1 KiB
Bash
Executable File
94 lines
3.1 KiB
Bash
Executable File
#!/bin/sh
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test_description='git rebase tests for -Xsubtree
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This test runs git rebase and tests the subtree strategy.
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'
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GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
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export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
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. ./test-lib.sh
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. "$TEST_DIRECTORY"/lib-rebase.sh
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commit_message() {
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git log --pretty=format:%s -1 "$1"
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}
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# There are a few bugs in the rebase with regards to the subtree strategy, and
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# this test script tries to document them. First, the following commit history
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# is generated (the onelines are shown, time flows from left to right):
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#
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# topic_1 - topic_2 - topic_3
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# \
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# README ---------------------- Add subproject main - topic_4 - files_subtree/topic_5
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#
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# Where the merge moves the files topic_[123].t into the subdirectory
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# files_subtree/ and topic_4 as well as files_subtree/topic_5 add files to that
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# directory directly.
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#
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# Then, in subsequent test cases, `git filter-branch` is used to distill just
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# the commits that touch files_subtree/. To give it a final pre-rebase touch,
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# an empty commit is added on top. The pre-rebase commit history looks like
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# this:
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#
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# Add subproject main - topic_4 - files_subtree/topic_5 - Empty commit
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#
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# where the root commit adds three files: topic_1.t, topic_2.t and topic_3.t.
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#
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# This commit history is then rebased onto `topic_3` with the
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# `-Xsubtree=files_subtree` option in two different ways:
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#
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# 1. without specifying a rebase backend
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# 2. using the `--rebase-merges` backend
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test_expect_success 'setup' '
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test_commit README &&
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git init files &&
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test_commit -C files topic_1 &&
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test_commit -C files topic_2 &&
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test_commit -C files topic_3 &&
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: perform subtree merge into files_subtree/ &&
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git fetch files refs/heads/main:refs/heads/files-main &&
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git merge -s ours --no-commit --allow-unrelated-histories \
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files-main &&
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git read-tree --prefix=files_subtree -u files-main &&
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git commit -m "Add subproject main" &&
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: add two extra commits to rebase &&
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test_commit -C files_subtree topic_4 &&
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test_commit files_subtree/topic_5 &&
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git checkout -b to-rebase &&
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git fast-export --no-data HEAD -- files_subtree/ |
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sed -e "s%\([0-9a-f]\{40\} \)files_subtree/%\1%" |
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git fast-import --force --quiet &&
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git reset --hard &&
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git commit -m "Empty commit" --allow-empty
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'
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test_expect_success 'Rebase -Xsubtree --empty=ask --onto commit' '
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reset_rebase &&
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git checkout -b rebase-onto to-rebase &&
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test_must_fail git rebase -Xsubtree=files_subtree --empty=ask --onto files-main main &&
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: first pick results in no changes &&
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git rebase --skip &&
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test "$(commit_message HEAD~2)" = "topic_4" &&
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test "$(commit_message HEAD~)" = "files_subtree/topic_5" &&
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test "$(commit_message HEAD)" = "Empty commit"
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'
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test_expect_success 'Rebase -Xsubtree --empty=ask --rebase-merges --onto commit' '
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reset_rebase &&
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git checkout -b rebase-merges-onto to-rebase &&
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test_must_fail git rebase -Xsubtree=files_subtree --empty=ask --rebase-merges --onto files-main --root &&
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: first pick results in no changes &&
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git rebase --skip &&
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test "$(commit_message HEAD~2)" = "topic_4" &&
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test "$(commit_message HEAD~)" = "files_subtree/topic_5" &&
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test "$(commit_message HEAD)" = "Empty commit"
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'
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test_done
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