From 71afd373b18a5018b6d725442b4004ddd61c79a2 Mon Sep 17 00:00:00 2001
From: Tom Hunze <dev@thunze.de>
Date: Mon, 26 Jan 2026 22:15:08 +0100
Subject: [PATCH] prek: add shell completions

https://prek.j178.dev/installation/#shell-completion
---
 pkgs/by-name/pr/prek/package.nix | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/pkgs/by-name/pr/prek/package.nix b/pkgs/by-name/pr/prek/package.nix
index c4b42b2ce913..b12fa0ad8c44 100644
--- a/pkgs/by-name/pr/prek/package.nix
+++ b/pkgs/by-name/pr/prek/package.nix
@@ -1,7 +1,9 @@
 {
   lib,
+  stdenv,
   fetchFromGitHub,
   rustPlatform,
+  installShellFiles,
   git,
   uv,
   python312,
@@ -22,6 +24,10 @@ rustPlatform.buildRustPackage (finalAttrs: {
 
   cargoHash = "sha256-KOpQ3P9cmcWYT3bPKtKpzHPagX4b9hH0EiWGpt98NnE=";
 
+  nativeBuildInputs = [
+    installShellFiles
+  ];
+
   nativeCheckInputs = [
     git
     python312
@@ -174,6 +180,13 @@ rustPlatform.buildRustPackage (finalAttrs: {
     "version_info"
   ];
 
+  postInstall = lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
+    installShellCompletion --cmd prek \
+      --bash <(COMPLETE=bash $out/bin/prek) \
+      --fish <(COMPLETE=fish $out/bin/prek) \
+      --zsh <(COMPLETE=zsh $out/bin/prek)
+  '';
+
   doInstallCheck = true;
   nativeInstallCheckInputs = [ versionCheckHook ];