git 坑

orgin/Head -> origin/master 分支

orgin/HEAD 像一个指针，表示默认分支。origin/Head -> origin/master 代表 origin/master 是默认分支
git remote set-haed origin -d 可以删除这个分支

.idea gitignore 忽略问题

.gitignore 中添加 .idea/ 没用

原因参照 - 1
原因参照 - 2
忽略所有目录下的 .idea -> **/.idea/

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$ git rm --cached FILENAME

macos 升级后 git 编译错误

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$> git
dyld: Symbol not found: _OBJC_IVAR_$_NSFont._fFlags
  Referenced from: /Applications/Xcode.app/Contents/Frameworks/IDEFoundation.framework/Versions/A/../../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit
  Expected in: /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
 in /Applications/Xcode.app/Contents/Frameworks/IDEFoundation.framework/Versions/A/../../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit
gcc: error: unable to locate xcodebuild, please make sure the path to the Xcode folder is set correctly!
gcc: error: You can set the path to the Xcode folder using /usr/bin/xcode-select -switch

git: error: unable to locate xcodebuild, please make sure the path to the Xcode folder is set correctly!

解决办法

xcode-select –install
sudo /usr/bin/xcode-select –switch /Library/Developer/CommandLineTools/