How to make git status show only staged files
 I would like to get a list of only the staged filenames.  I can't find the equivalent flag for --name-only for the git status command.  What is a good alternative?  
 The file list will be piped to php -l (PHP lint syntax checker).  
Solution: the complete command
git diff --name-only --cached | xargs -l php -l
使用git diff --name-only (使用--cached获取暂存文件) 
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