Add fish completions

Closes https://github.com/mhinz/neovim-remote/pull/148

README.md

@@ -291,9 +291,12 @@ Using nvr from within `:terminal`: ![Demo 2](https://github.com/mhinz/neovim-rem
         \| endif
     ```
 
-- **Can I have auto-completion for bash?**
+- **Can I have auto-completion for bash/fish?**
 
     If you want basic auto-completion for bash, you can source [this
     script](contrib/completion.bash) in your .bashrc.
 
     This also completes server names with the `--servername` option.
+
+    If you want auto-completion for fish, you can add [this
+    file](contrib/completion.fish) to your fish completions dir.

contrib/completion.fish

@@ -0,0 +1,28 @@
+# Completions for nvr in fish shell
+# To install, save file to completions directory of fish config (e.g. ~/.config/fish/completions/nvr.fish)
+
+complete --command=nvr --long-option=remote --description='Use :edit to open files. If no process is found, throw an error and start a new one'
+complete --command=nvr --long-option=remote-wait --description='Like --remote, but block until all buffers opened by this option get deleted or the process exits'
+complete --command=nvr --long-option=remote-silent --description='Like --remote, but throw no error if no process is found'
+complete --command=nvr --long-option=remote-wait-silent --description='Combines --remote-wait and --remote-silent'
+complete --command=nvr --long-option=remote-tab --description='Like --remote, but use :tabedit'
+complete --command=nvr --long-option=remote-tab-wait --description='Like --remote-wait, but use :tabedit'
+complete --command=nvr --long-option=remote-tab-silent --description='Like --remote-silent, but use :tabedit'
+complete --command=nvr --long-option=remote-tab-wait-silent --description='Like --remote-wait-silent, but use :tabedit'
+complete --command=nvr --long-option=remote-send --no-files --description='Send key presses'
+complete --command=nvr --long-option=remote-expr --no-files --description='Evaluate expression and print result in shell'
+complete --command=nvr --long-option=servername --no-files --arguments='(nvr --serverlist)' --description='Set the address to be used. This overrides the default "/tmp/nvimsocket" and $NVIM_LISTEN_ADDRESS'
+complete --command=nvr --long-option=serverlist --description='Print the TCPv4 and Unix domain socket addresses of all nvim processes'
+complete --command=nvr --short-option=h --long-option=help --description='show help message and exit'
+complete --command=nvr --short-option=c --no-files --description='Execute a command after every other option'
+complete --command=nvr --short-option=d --description='Diff mode. Use :diffthis on all to be opened buffers'
+complete --command=nvr --short-option=l --description='Change to previous window via ":wincmd p"'
+complete --command=nvr --short-option=o --description='Open files via ":split"'
+complete --command=nvr --short-option=O --description='Open files via ":vsplit"'
+complete --command=nvr --short-option=p --description='Open files via ":tabedit"'
+complete --command=nvr --short-option=q --description='Read errorfile into quickfix list and display first error'
+complete --command=nvr --short-option=s --description='Silence "no server found" message'
+complete --command=nvr --short-option=t --no-files --description='Jump to file and position of given tag'
+complete --command=nvr --long-option=nostart --description='If no process is found, do not start a new one'
+complete --command=nvr --long-option=version --description='Show the nvr version'
+complete --command=nvr --old-option=cc --description='Execute a command before every other option'