From 8904a6e4e526586006dbd57fc647007dd78fd508 Mon Sep 17 00:00:00 2001
From: gildlab <gildlab@gildlab.xyz>
Date: Tue, 19 May 2026 09:45:35 +0000
Subject: [PATCH] flake: skip npm ci in default shell when lockfile already
 installed

The default devShell ran npm ci on every entry whenever package.json was
present, wiping and reinstalling node_modules even when it already matched
the lockfile. Compare ./package-lock.json to the copy npm writes into
./node_modules/.package-lock.json after a successful install, and skip
when they match. First entry (or any entry after the lockfile changes)
still runs npm ci.

Closes #175

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
---
 flake.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/flake.nix b/flake.nix
index f1e75b3..cb31735 100644
--- a/flake.nix
+++ b/flake.nix
@@ -576,7 +576,7 @@
               ${pre-commit.shellHook}
               ${source-dotenv}
 
-              if [ -f ./package.json ]; then
+              if [ -f ./package.json ] && ! cmp -s ./package-lock.json ./node_modules/.package-lock.json 2>/dev/null; then
                 npm ci --ignore-scripts;
               fi
             '';