在atom+react-native項目中安裝了nuclide。然而使用flow的時候出現了問題。
$ brew -v
Homebrew 1.2.0
$ flow version
Flow, a static type checker for JavaScript, version 0.45.0
$ flow
Launching Flow server for /Users/real/Desktop/reactPro/pro2
Wrong version of Flow. The config specifies version ^0.42.0 but this is version 0.45.0在我的.flowconfig文件中最後的地方也可以看到：
[version]
^0.42.0這意味着flow的版本應該是>=0.42.0 <0.43.0，所以0.45.0是不合適的。這就需要下載0.42.0的版本。
搜索了網上一些說法(brew 安裝特定版本)：
- brew install flow（安裝的是最新版本）
- brew versions (已經廢棄了)
- brew tap homebrew/versions（已經廢棄了）
Warning: homebrew/versions was deprecated. This tap is now empty as all its formulae were migrated.- npm install [email protected] -g （可以安裝，但是沒看到實際效果）
在我安裝flow的過程中有這樣的提示：
$ brew install flow
==> Downloading https://homebrew.bintray.com/bottles/flow-0.45.0.sierra.bottle.tar.gz
Already downloaded: /Users/real/Library/Caches/Homebrew/flow-0.45.0.sierra.bottle.tar.gz
==> Pouring flow-0.45.0.sierra.bottle.tar.gz
==> Caveats
Bash completion has been installed to:
/usr/local/etc/bash_completion.d
zsh completions have been installed to:
/usr/local/share/zsh/site-functions
==> Summary
�� /usr/local/Cellar/flow/0.45.0: 8 files, 6.4MB它下載的是0.45.0的版本，而我需要的是0.42.0的版本，於是我手動下載了。
https://homebrew.bintray.com/bottles/flow-0.42.0.sierra.bottle.tar.gz然後將解壓後的文件放到
/usr/local/Cellar/flow/這樣就安裝了0.42.0的版本。然後通過
$ brew switch flow 0.42.0就可以了。。一番心酸。。老哥們讚一讚。。