From d23c357f1c0248c7f38260d696082ace77758df4 Mon Sep 17 00:00:00 2001
From: Urban Skudnik <urban.skudnik@gmail.com>
Date: Mon, 3 Sep 2018 17:21:43 +0200
Subject: [PATCH] hcloud: Add autocomplete support for bash and zsh

Currently one would need to manually run the command to generate
completion and insert it into `.bashrc`/`.zshrc` to get the
autocompletion to work. This patch will automatically generate
both docs and save them to correct position so it should continue
to work even if user changes the shell at a later stage.
---
 pkgs/development/tools/hcloud/default.nix | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/pkgs/development/tools/hcloud/default.nix b/pkgs/development/tools/hcloud/default.nix
index 877080508d40..b3fa6f852f76 100644
--- a/pkgs/development/tools/hcloud/default.nix
+++ b/pkgs/development/tools/hcloud/default.nix
@@ -14,6 +14,19 @@ buildGoPackage rec {
 
   buildFlagsArray = [ "-ldflags=" "-w -X github.com/hetznercloud/cli/cli.Version=${version}" ];
 
+  postInstall = ''
+    mkdir -p \
+      $bin/etc/bash_completion.d \
+      $bin/share/zsh/vendor-completions
+
+    # Add bash completions
+    $bin/bin/hcloud completion bash > "$bin/etc/bash_completion.d/hcloud"
+
+    # Add zsh completions
+    echo "#compdef hcloud" > "$bin/share/zsh/vendor-completions/_hcloud"
+    $bin/bin/hcloud completion zsh >> "$bin/share/zsh/vendor-completions/_hcloud"
+  '';
+
   meta = {
     description = "A command-line interface for Hetzner Cloud, a provider for cloud virtual private servers";
     homepage = https://github.com/hetznercloud/cli;