* [Fix] Only reserve one best checkpoint

* [Fix] Only reserve one best checkpoint

* Fix unit test

* shutdown logging

* clean the save_checkpoint logic

* Enhance config

* add unit test data

* Refacotr unitest of checkpointhook

* add comments

* Fix unit test

* remove _get_metric_scope

* tmp save

* Revert "remove _get_metric_scope"

This reverts commit eeb7a8c5ed2766bf773a9ed28f731fddacd10ac1.

* Revert "Revert "remove _get_metric_scope""

This reverts commit 5398255f6fb3dac8341f7d808f0d7d09350fcaae.

* Revert "tmp save"

This reverts commit cdc9919be8e0a78bbf264c060de2a4396c137d5a.

* clean the code

* Fix ut

* minor fix

* use str.replace

* add publish keys in checkpointhook and update hook.md file

* Update checkpoint_hook.py

To avoid `mypy` warning `mmengine/hooks/checkpoint_hook.py:358: error: Unsupported right operand type for in ("Optional[List[str]]") Found 1 error in 1 file (checked 224 source files)`

* Update hook.md

Try to avoid trim trailing whitespace waring in hook.md

* Update mmengine/hooks/checkpoint_hook.py

Co-authored-by: Mashiro <57566630+HAOCHENYE@users.noreply.github.com>

* Update mmengine/hooks/checkpoint_hook.py

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* Update mmengine/hooks/checkpoint_hook.py

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* Update mmengine/hooks/checkpoint_hook.py

Co-authored-by: Mashiro <57566630+HAOCHENYE@users.noreply.github.com>

* Update mmengine/hooks/checkpoint_hook.py

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* Update mmengine/hooks/checkpoint_hook.py

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* Update mmengine/hooks/checkpoint_hook.py

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* Update mmengine/hooks/checkpoint_hook.py

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* Update mmengine/hooks/checkpoint_hook.py

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* Update mmengine/hooks/checkpoint_hook.py

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* Update checkpoint_hook.py

* Update docs/en/tutorials/hook.md

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* Update mmengine/hooks/checkpoint_hook.py

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* Update mmengine/hooks/checkpoint_hook.py

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* Update mmengine/hooks/checkpoint_hook.py

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* Update mmengine/hooks/checkpoint_hook.py

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* Update hook.md

add 自动发布最好的和最后的权重

* Update mmengine/hooks/checkpoint_hook.py

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* Update checkpoint_hook.py

add condition when the best checkpoints more than 1.

* Update mmengine/hooks/checkpoint_hook.py

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* Update checkpoint_hook.py

delete re judge

* Update checkpoint_hook.py

* Update checkpoint_hook.py

* Update mmengine/hooks/checkpoint_hook.py

Co-authored-by: Mashiro <57566630+HAOCHENYE@users.noreply.github.com>

* Update mmengine/hooks/checkpoint_hook.py

Co-authored-by: Mashiro <57566630+HAOCHENYE@users.noreply.github.com>

* Update checkpoint_hook.py

* Update mmengine/hooks/checkpoint_hook.py

Co-authored-by: Mashiro <57566630+HAOCHENYE@users.noreply.github.com>

* Update mmengine/hooks/checkpoint_hook.py

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* Update checkpoint_hook.py

* Update mmengine/hooks/checkpoint_hook.py

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* Add Test for publish model

* Update checkpoint_hook.py

* Update test_checkpoint_hook.py

* Fix file to pass pre-commit check

* Update mmengine/hooks/checkpoint_hook.py

Co-authored-by: Mashiro <57566630+HAOCHENYE@users.noreply.github.com>

* Fix mypy warning

* rm not necessary line in checkpoint_hook.py

* Update mmengine/hooks/checkpoint_hook.py

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* rm unnecessary messages add to message_hub

* Update mmengine/hooks/checkpoint_hook.py

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* Update docs/zh_cn/tutorials/hook.md

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* Update docs/zh_cn/tutorials/hook.md

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* update checkpoint hook and hook.md file

* Apply suggestions from code review

* Apply suggestions from code review

Co-authored-by: Mashiro <57566630+HAOCHENYE@users.noreply.github.com>

* Update mmengine/hooks/checkpoint_hook.py

---------

Co-authored-by: Mashiro <57566630+HAOCHENYE@users.noreply.github.com>
Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* Replace warning with print_log

* Add comments for testing warning

* [Enhance] Ensure metrics is not empty when saving best ckpts

* fix warn to warning

* delete a unnecessary method

* [Refactor] Refactor fileio but without breaking bc

* handle compatibility

* fix format

* modify io functions

* fix ut

* fix ut

* rename method names

* refine

* refine docstring

* fix ut in windows

* update ut

* minor fix

* ensure client is not None when closing it

* add more examples for list_dir_or_file interface

* refine docstring

* refine deprecated info

* fix ut

* add a description for lmdb docstring

* fix wrong epoch andd iter when save bbest ckpt

* fix ut

* fix resume best ckpt unexpectedly

* minor refine

* fix unit test

* support save best based on multi metrics

* add unit test

* resolve bugs after rebasing

* revise docstring

* revise docstring

* fix as comment

* revise as comment

* fix bug of not save-best in iteration-based training

* revise the unit test

* [Feat] Support save best ckpt

* reformat code

* rename function and reformat code

* fix logging info

* support resume from ceph

* move func and refine

* delete symlink

* fix unittest

* perserve _allow_symlink and symlink

* change CheckPointHook before_run to before train

* using tmp_path in each checkpointhook test case

* [Refactor] Add batch_idx to hook input.

* update

* [Feature]: Add dist semantics in checkpoint hook

* [Fix]: Delete sync buffer in checkpoint hook

* [Feature]: Add checkpoint hook

* [Fix]: Fix lint

* [Fix]: Delete redundant optional and give an example to our_dir

* [Feature]: Add test the last_ckpt in UT

* [Fix]: Fix docstring problem

* [Fix]: Add patch to UT

* [Feature]: Add Test case for by epoch