[split] Move proxy plugin to oh-my-fish/plugin-proxy

https://github.com/oh-my-fish/plugin-proxy

plugins/proxy/README.md

-proxy plugin
-============
-
-The proxy plugin provides a couple helper functions to those of us who are
-stuck behind HTTP/HTTPS/FTP proxies that require authentication.  The variables
-it exports are used by many command-line and GUI applications on Linux, as well
-as [MacPorts][1] and [Homebrew][2] on OS X.
-
-Both uppercase and lowercase versions of the proxy environment variables are
-set, some applications are case sensitive.  If you'd like to learn more about
-the use of these variables, this [Arch Wiki Article][3] is a good place to
-start.
-
-## Usage
-
-In all cases you will need to add 'proxy' to your fish_plugins list in
-config.fish
-
-### No authentication
-
-If you just want to have the proxy plugin configure all the environment
-variables, you may set proxy_host:
-
-    set proxy_host myproxy.example.com:8000
-
-The proxy plugin will prepend `http://` for you.  Here's the result:
-
-    ~> set -x |grep proxy
-    ALL_PROXY http://myproxy.example.com:8000
-    FTP_PROXY http://myproxy.example.com:8000
-    HTTPS_PROXY http://myproxy.example.com:8000
-    HTTP_PROXY http://myproxy.example.com:8000
-    all_proxy http://myproxy.example.com:8000
-    ftp_proxy http://myproxy.example.com:8000
-    http_proxy http://myproxy.example.com:8000
-    https_proxy http://myproxy.example.com:8000
-
-### With authentication
-
-Set your proxy host and username:
-
-    set proxy_host myproxy.example.com:8000
-    set proxy_user mylogin
-
-When you need to make use of the proxy, just run `proxy`.  It will prompt you
-for a password and setup your environment.
-
-If you didn't setup a proxy_user variable, you will be prompted for a username.
-
-If you wish to clear your proxy variables, run `noproxy`.
-
-[1]: http://www.macports.org/
-[2]: http://brew.sh/
-[3]: https://wiki.archlinux.org/index.php/proxy_settings

plugins/proxy/_proxy_set.fish

-function _proxy_set -a proxy \
-  -d "Set all proxy vars to specified value"
-
-  set -l envars http_proxy HTTP_PROXY \
-    https_proxy HTTPS_PROXY \
-    ftp_proxy FTP_PROXY \
-    all_proxy ALL_PROXY
-  for envar in $envars
-    if test $proxy = '-e'
-      set -e $envar
-    else
-      set -gx $envar $proxy
-    end
-  end
-end

plugins/proxy/noproxy.fish

-function noproxy -d "Clear all proxy environment variables"
-  _proxy_set -e
-end

plugins/proxy/proxy.fish

-function proxy -d "Setup proxy environment variables"
-  if not set -q proxy_host
-    echo "Error: You must set proxy_host to your proxy hostname:port in config.fish"
-    echo "You may also set proxy_user to your username"
-    return
-  end
-
-  # Get user & password
-  set -l user $proxy_user
-  if not set -q proxy_user
-    read -p "echo -n 'Proxy User: '" user
-  end
-  # Hacky way to read password in fish
-  echo -n 'Proxy Password: '
-  stty -echo
-  head -n 1 | read -l pass
-  stty echo
-  echo
-  # URL encode password
-  set -l chars (echo $pass | sed -E -e 's/./\n\\0/g;/^$/d;s/\n//')
-  printf '%%%02x' "'"$chars"'" | read -l encpass
-
-  _proxy_set "http://$user:$encpass@$proxy_host"
-end
-

plugins/proxy/proxy.load

-# Initial proxy setup (no username/password)
-if set -q proxy_host
-  _proxy_set "http://$proxy_host"
-end
-