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由 Jonathan Nieder 提交于
If $GIT_DIR is set, setup_git_directory_gently does not have to do any repository discovery at all. Split off a function for the validation it still does do, in the hope that this will make setup_git_directory_gently proper less daunting to read. Signed-off-by: NJonathan Nieder <jrnieder@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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