pod repo update 报错 Failed to connect to GitHub to update the CocoaPods/Specs specs repo - Please ...

今天 `$ pod install` 时报错

[!] CocoaPods could not find compatible versions for pod "CL_ShanYanSDK":
  In snapshot (Podfile.lock):
    CL_ShanYanSDK (= 2.3.1.3, ~> 2.3.1.3)

  In Podfile:
    CL_ShanYanSDK (~> 2.3.1.3)

None of your spec sources contain a spec satisfying the dependencies: `CL_ShanYanSDK (~> 2.3.1.3), CL_ShanYanSDK (= 2.3.1.3, ~> 2.3.1.3)`.

You have either:
 * out-of-date source repos which you can update with `pod repo update` or with `pod install --repo-update`.
 * mistyped the name or version.
 * not added the source repo that hosts the Podspec to your Podfile.

正常的输入 `$ pod repo update` 这次却报错

[!] Failed to connect to GitHub to update the CocoaPods/Specs specs repo - Please check if you are offline, or that GitHub is down

查查资料，需要更新Mac系统对应的openssl，好吧，搬运工上线

1.`$ which openssl` 输出 /usr/bin/openssl

2.`$ openssl version` 输出 LibreSSL 2.8.3

3.`/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"`

这一步如果报错

curl: (7) Failed to connect to raw.githubusercontent.com port 443: Connection refused

原因

由于某些“因素”，导致GitHub的raw.githubusercontent.com域名解析被污染了。

查询真实IP

在 https://www.ipaddress.com/ 查询raw.githubusercontent.com的真实IP。

修改hosts

$ sudo vi /etc/hosts 并输入密码
vim 编辑 host 添加 199.232.28.133 raw.githubusercontent.com

image.png

ESC退出编辑模式，再输入:wq保存并退出，再次输入/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"成功执行后需要点击回车

4.更新 brew

$ brew update 如果报错

[Error: /usr/local must be writable!](http://securityer.lofter.com/post/1d0f3ee7_bcf5f05)

点击查看解决步骤

5.安装 openssl

$ brew install openssl
$ brew upgrade openssl

6. If you need to have this software first in your PATH run: echo 'export PATH="/usr/local/opt/openssl/bin:$PATH"' >> ~/.bash_profile

$ which openssl 输出 /usr/bin/openssl
$ echo 'export PATH="/usr/local/opt/openssl/bin:$PATH"' >> ~/.bash_profile
$ source ~/.bash_profile
$ which openssl 输出 /usr/local/opt/openssl/bin/openssl
$ openssl version 输出 OpenSSL 1.1.1g 21 Apr 2020

7. 更新ruby

$ brew install rbenv ruby-build
$ echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
$ echo 'if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi' >> ~/.bash_profile
$ source ~/.bash_profile
$ ruby --version 输出：ruby 2.0.0p648 (2015-12-16 revision 53162) [universal.x86_64-darwin16]
$ rvm list known查看最新版本列表

image.png

$ rvm install 2.7 如果报错：

Error running 'requirements_osx_brew_update_system ruby-2.7.0

参考：http://www.cnblogs.com/yajunLi/p/8484607.html

$ ruby --version 输出 ruby 2.7.0preview1 (2019-05-31 trunk c55db6aa271df4a689dc8eb0039c929bf6ed43ff) [x86_64-darwin19]

8.更新 cocoapods

$ gem install cocoapods -n /usr/local/bin
$ pod --version 输出 1.9.3

9.最后进入项目

$ pod repo update
$ pod install