From 56ac1035471a688df4ed303797a7567a9dbdafdb Mon Sep 17 00:00:00 2001
From: Alan Guo Xiang Tan <gxtan1990@gmail.com>
Date: Fri, 27 Dec 2024 08:31:01 +0800
Subject: [PATCH] DEV: Copy gems from Docker image in Github actions tests
 workflow

On our own self hosted runners, pulling from github actions cache is quite slow and can take up to 20 seconds for the `bundler cache` step. Instead, we will now copy the gems from the `/var/www/discourse/vendor/bundle` folder in the `discourse/discourse_test:release` image which is built daily. This eliminates the need to pull from Github actions cache and also potentially reduces our costs of cache storage.

Note that `discourse/discourse_test:release` is pulled periodically on our self hosted runners so there is no impact on the time it takes to initialize the container.
---
 .github/workflows/tests.yml | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 17840e62fbb..434afb59255 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -30,7 +30,7 @@ jobs:
     if: github.event_name == 'pull_request' || github.repository != 'discourse/discourse-private-mirror'
     name: ${{ matrix.target }} ${{ matrix.build_type }} # Update fetch-job-id step if changing this
     runs-on: ${{ (github.repository != 'discourse/discourse' && 'ubuntu-22.04-8core') || 'debian-12' }}
-    container: discourse/discourse_test:slim${{ (matrix.build_type == 'frontend' || matrix.build_type == 'system') && '-browsers' || '' }}
+    container: discourse/discourse_test:${{ (github.repository == 'discourse/discourse' && 'release') || format('slim{0}', (matrix.build_type == 'frontend' || matrix.build_type == 'system') && '-browsers' || '') }}
     timeout-minutes: 20
 
     env:
@@ -111,10 +111,15 @@ jobs:
 
       - name: Bundler cache
         uses: actions/cache@v4
+        if: github.repository != 'discourse/discourse'
         with:
           path: vendor/bundle
           key: ${{ runner.os }}-${{ steps.container-envs.outputs.ruby_version }}-${{ steps.container-envs.outputs.debian_release }}-gem-${{ hashFiles('**/Gemfile.lock') }}-cachev2
 
+      - name: Copy gems to vendor/bundle
+        if: github.repository == 'discourse/discourse'
+        run: cp -r /var/www/discourse/vendor/bundle vendor/bundle
+
       - name: Setup gems
         run: |
           gem install bundler --conservative -v $(awk '/BUNDLED WITH/ { getline; gsub(/ /,""); print $0 }' Gemfile.lock)