[EtC] Mac OS X 업데이트 후, svn 명령어에 문제 발생시.

Mac OS 는 업데이트 후 안드로이드 스튜디오에서 svn 명령어를 제대로 사용 하지 못하는 상황이 발생 하였다.

freecatz-MacBook-Pro:~ freecatz$ svn --version
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun

freecatz-MacBook-Pro:~ freecatz$ xcode-select --install
xcode-select: note: install requested for command line developer tools


freecatz-MacBook-Pro:~ freecatz$ svn --version
svn, version 1.9.4 (r1740329)
   compiled Aug 13 2017, 18:20:28 on x86_64-apple-darwin16.1.0

Copyright (C) 2016 The Apache Software Foundation.
This software consists of contributions made by many people;
see the NOTICE file for more information.
Subversion is open source software, see http://subversion.apache.org/

The following repository access (RA) modules are available:

* ra_svn : Module for accessing a repository using the svn network protocol.
  - handles 'svn' scheme
* ra_local : Module for accessing a repository on local disk.
  - handles 'file' scheme
* ra_serf : Module for accessing a repository via WebDAV protocol using serf.
  - using serf 1.3.8 (compiled with 1.3.8)
  - handles 'http' scheme
  - handles 'https' scheme

The following authentication credential caches are available:

* Plaintext cache in /Users/freecatz/.subversion
* GPG-Agent
* Mac OS X Keychain

freecatz-MacBook-Pro:~ freecatz$

참고 : http://redutan.github.io/2015/10/05/osx-after-update-git-error