From a8e4970af6005a4339a14f2e46fa30ee270ae933 Mon Sep 17 00:00:00 2001
From: Aaron Jheng <wentworth@outlook.com>
Date: Fri, 3 Apr 2026 09:36:46 +0800
Subject: [PATCH] swift-format: add shell completions support

Add shell completions for bash, zsh, and fish using
swift-format's built-in --generate-completion-script flag.
---
 .../compilers/swift/swift-format/default.nix        | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/compilers/swift/swift-format/default.nix b/pkgs/development/compilers/swift/swift-format/default.nix
index f1d435a6cca5..adb76e7a359a 100644
--- a/pkgs/development/compilers/swift/swift-format/default.nix
+++ b/pkgs/development/compilers/swift/swift-format/default.nix
@@ -1,11 +1,11 @@
 {
   lib,
   stdenv,
-  fetchpatch,
   callPackage,
   swift,
   swiftpm,
   swiftpm2nix,
+  installShellFiles,
   Dispatch,
   Foundation,
 }:
@@ -22,6 +22,7 @@ stdenv.mkDerivation {
   nativeBuildInputs = [
     swift
     swiftpm
+    installShellFiles
   ];
   buildInputs = [ Foundation ];
 
@@ -38,6 +39,16 @@ stdenv.mkDerivation {
     binPath="$(swiftpmBinPath)"
     mkdir -p $out/bin
     cp $binPath/swift-format $out/bin/
+
+    # Generate shell completions
+    for shell in bash zsh fish; do
+      $out/bin/swift-format --generate-completion-script $shell > swift-format.$shell
+    done
+
+    installShellCompletion --cmd swift-format \
+      --bash swift-format.bash \
+      --zsh swift-format.zsh \
+      --fish swift-format.fish
   '';
 
   meta = {