Merge pull request #223415 from caarlos0/nfpm-cmp-man

nfpm: add man and completions

pkgs/tools/package-management/nfpm/default.nix

@@ -1,4 +1,10 @@
-{ lib, buildGoModule, fetchFromGitHub }:
+{ stdenv
+, lib
+, buildGoModule
+, fetchFromGitHub
+, installShellFiles
+, buildPackages
+}:
 
 buildGoModule rec {
   pname = "nfpm";
@@ -15,6 +21,19 @@ buildGoModule rec {
 
   ldflags = [ "-s" "-w" "-X main.version=${version}" ];
 
+  nativeBuildInputs = [ installShellFiles ];
+
+  postInstall =
+    let emulator = stdenv.hostPlatform.emulator buildPackages;
+    in ''
+      ${emulator} $out/bin/nfpm man > nfpm.1
+      installManPage ./nfpm.1
+      installShellCompletion --cmd nfpm \
+        --bash <(${emulator} $out/bin/nfpm completion bash) \
+        --fish <(${emulator} $out/bin/nfpm completion fish) \
+        --zsh  <(${emulator} $out/bin/nfpm completion zsh)
+    '';
+
   meta = with lib; {
     description = "A simple deb and rpm packager written in Go";
     homepage = "https://github.com/goreleaser/nfpm";