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由 Petr Baudis 提交于
Add $GIT_CONFIG environment variable whose content is used instead of .git/config if set. Also add $GIT_CONFIG_LOCAL as a forward-compatibility cue for whenever we will finally come to support] global configuration files (properly). Signed-off-by: NPetr Baudis <pasky@suse.cz> Signed-off-by: NJunio C Hamano <junkio@cox.net>
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