valut: add bash completions

pkgs/tools/security/vault/default.nix

@@ -1,6 +1,13 @@
 { stdenv, lib, buildGoPackage, fetchFromGitHub }:
 
-buildGoPackage rec {
+let
+  vaultBashCompletions = fetchFromGitHub {
+    owner = "iljaweis";
+    repo = "vault-bash-completion";
+    rev = "62c142e20929f930c893ebe3366350d735e81fbd";
+    sha256 = "0nfv10ykjq9751ijdyq728gjlgldm1lxvrar8kf6nz6rdfnnl2n5";
+  };
+in buildGoPackage rec {
   name = "vault-${version}";
   version = "0.6.1";
 
@@ -18,6 +25,11 @@ buildGoPackage rec {
       -X github.com/hashicorp/vault/version.GitCommit=${version}
   '';
 
+  postInstall = ''
+    mkdir -p $bin/share/bash-completion/completions/ 
+    cp ${vaultBashCompletions}/vault-bash-completion.sh $bin/share/bash-completion/completions/vault
+  '';
+
   meta = with stdenv.lib; {
     homepage = https://www.vaultproject.io;
     description = "A tool for managing secrets";