From 2d064bab64e0e0bbb4f1002ebc4f823c070068a1 Mon Sep 17 00:00:00 2001
From: Gareth <garethdavisrogers@gmail.com>
Date: Wed, 20 Aug 2025 10:13:20 -0400
Subject: [PATCH] Created a bundler service that runs once removing
 responsibilities from any other services.  The bundler service always runs
 install which should still be pretty fast if nothing or only a few gems have
 changed. A healthcheck won't work unless bundler runs continuously which is
 impractical.  Instead, a checksum is generated on bundle install and
 sentinels in the other services have a definite confirmation that bundle is
 complete.  The nice thing about this approach is that web, webpack, and
 sidekiq (which share the same bundles dependencies) will not concurrently run
 bundle install solving dep install redundancies.

---
 compose.yaml | 36 +++++++++++++++++++++++++++++-------
 1 file changed, 29 insertions(+), 7 deletions(-)

diff --git a/compose.yaml b/compose.yaml
index 1dc150c50a..ef6f18762c 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -17,6 +17,18 @@ services:
 
   redis:
     image: redis
+
+  bundler:
+    build: .
+    # Runs once: installs gems into /bundles, writes a checksum sentinel, then exits
+    command: >
+      sh -lc 'bundle check || bundle install --jobs 4 --retry 3 --quiet;
+              sha256sum Gemfile.lock > /bundles/.Gemfile.lock.sha'
+    volumes:
+      - .:/usr/src/app
+      - gems:/bundles
+    restart: "no"
+
   web:
     tty: true
     stdin_open: true
@@ -48,15 +60,17 @@ services:
       WEBPACKER_DEV_SERVER_PUBLIC: localhost:3035
 
     command: >
-      bash -c "rm -f tmp/pids/server.pid &&
-               (bundle check || bundle install) &&
-               bundle exec rails db:prepare &&
-               yarn install &&
-               bundle exec rails s -b 0.0.0.0 -p 3000"
+      sh -lc 'rm -f tmp/pids/server.pid;
+              until [ -f /bundles/.Gemfile.lock.sha ] && sha256sum -c /bundles/.Gemfile.lock.sha >/dev/null 2>&1; do sleep 0.5; done;
+              bundle exec rails db:prepare &&
+              yarn install &&
+              exec bundle exec rails s -b 0.0.0.0 -p 3000'
 
   sidekiq:
     build: .
-    command: bundle exec sidekiq
+    command: >
+      sh -lc 'until [ -f /bundles/.Gemfile.lock.sha ] && sha256sum -c /bundles/.Gemfile.lock.sha >/dev/null 2>&1; do sleep 0.5; done;
+              exec bundle exec sidekiq'
     depends_on:
       db:
         condition: service_healthy
@@ -75,12 +89,20 @@ services:
 
   webpack:
     build: .
-    command: ./bin/webpack-dev-server
+    command: >
+      sh -lc 'until [ -f /bundles/.Gemfile.lock.sha ] && sha256sum -c /bundles/.Gemfile.lock.sha >/dev/null 2>&1; do sleep 0.5; done;
+              exec ./bin/webpack-dev-server'
     ports:
       - "3035:3035"
     volumes:
       - .:/usr/src/app
       - gems:/bundles
+    healthcheck:
+      test: ["CMD-SHELL", "wget -qO- http://localhost:3035/webpack-dev-server >/dev/null || wget -qO- http://localhost:3035/sockjs-node/info >/dev/null"]
+      interval: 5s
+      timeout: 3s
+      retries: 30
+
     environment:
       WEBPACKER_DEV_SERVER_HOST: 0.0.0.0
 volumes: