今天试玩Gatsby，安装sharp的时候由于是Github的，连不上。下载失败。
info sharp Downloading https://github.com/lovell/sharp-libvips/releases/download/v8.10.0/libvips-8.10.0-darwin-x64.tar.br
ERR! sharp socket hang up
info sharp Attempting to build from source via node-gyp but this may fail due to the above error
然后报这个错：
fatal error: 'vips/vips8' file not found
果然遇到Github都是一个慢字…
山哥有一个外网服务器 （my-jumper.com），速度挺快的，因为奉公守法不想做长期代理（免禁IP免罚款）。于是想用它做跳板机，让我能比较快地下载这个包。事不宜迟，走一个！
sam $ sudo ssh -f -N -g -L 443:github.com:443 my-jumper.com
修改 DNS使得所有的github.com走本地
- Run command
sudo vi /etc/hosts, 加上以下并保存。在Mac下保存即时生效
127.0.0.1 github.com
我们来验证一下：ping github.com
sam$ ping github.com
PING github.com (127.0.0.1): 56 data bytes
64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.046 ms
果然通的！
咱们来看看现在装会不会很快！
npm i -g sharp
info sharp Downloading https://github.com/lovell/sharp-libvips/releases/download/v8.10.0/libvips-8.10.0-darwin-x64.tar.br
等了一下，发现没什么进展，于是看看是什么情况：
sam$ curl https://github.com/lovell/sharp-libvips/releases/download/v8.10.0/libvips-8.10.0-darwin-x64.tar.br
<html><body>You are being <a href="https://github-production-release-asset-2e65be.s3.amazonaws.com/104502835/a530c980-e54a-11ea-884a-79331ea787e8?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A%2F20201220%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20201220T130545Z&X-Amz-Expires=300&X-Amz-Signature=7e2a057712c5903f8703b176ad697315c9880a1a5b49d9f1ceacb9f103ee4751&X-Amz-SignedHeaders=host&actor_id=0&key_id=0&repo_id=104502835&response-content-disposition=attachment%3B%20filename%3Dlibvips-8.10.0-darwin-x64.tar.br&response-content-type=application%2Foctet-stream">redirected</a>.</body></html>
居然被转发了，背后原来是去了AWS的S3。
好吧，重新转发！
$ ps aux|grep ssh
sam 2814 0.0 0.0 4285680 248 ?? S 8Dec20 0:00.04 /usr/bin/ssh-agent -l
sam 27713 0.0 0.0 4278688 744 s002 S+ 9:12PM 0:00.00 grep ssh
root 26978 0.0 0.0 4408788 656 ?? Ss 9:02PM 0:00.00 ssh -f -N -g -L 443:github.com:443 ubuntu@my-jumper.com
$ sudo kill -9 26978
重新来设置
sam $ sudo ssh -f -N -g -L 443:github-production-release-asset-2e65be.s3.amazonaws.com:443 ubuntu@my-jumper.com
# change the "127.0.0.1 github.com" to be as following
sam $ sudo vi /etc/hosts
127.0.0.1 github-production-release-asset-2e65be.s3.amazonaws.com
# 验证一下，发现生效了，哦也～
sam$ ping github-production-release-asset-2e65be.s3.amazonaws.com
PING github-production-release-asset-2e65be.s3.amazonaws.com (127.0.0.1): 56 data bytes
64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.046 ms
按捺下激动的心情，控制住颤抖的手，再来安装
sam$ npm i -g sharp
> sharp@0.26.3 install /usr/local/lib/node_modules/sharp
> (node install/libvips && node install/dll-copy && prebuild-install) || (node-gyp rebuild && node install/dll-copy)
info sharp Downloading https://github.com/lovell/sharp-libvips/releases/download/v8.10.0/libvips-8.10.0-darwin-x64.tar.br
+ sharp@0.26.3
updated 1 package in 9.607s
完事了，9秒多装好！果然是Work的！
事后把/etc/hosts还原，把这个SSH进程杀掉！
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