Add Chromium to our images

Chrome isn’t available for aarch64 yet, but Chromium (which is basically
the same browser without the proprietary bits from Google) is shipped by
Debian. They also ship a Chrome driver compiled for aarch64.

This patch adds Chromium to our images without removing Chrome on
x86_64, allowing a smooth transition to using Chromium only.

image/discourse_dev/install-selenium

@@ -1,13 +1,10 @@
 #!/bin/bash
 set -e
 
-# The chrome webdriver isn’t available for the aarch64 architecture (yet). We
-# have to rely on the geckodriver instead, so we’re just installing firefox and
-# not even chromium.
 # The Selenium gem isn’t shipped with the `selenium-manager` binary for aarch64
-# either (yet). So we have to compile it ourselves.
+# (yet). So we have to compile it ourselves.
 if [ "$(dpkg --print-architecture)" = "arm64" ]; then
-    apt update && apt install -y firefox-esr
+    apt update && apt install -y firefox-esr chromium-driver
     cd /tmp
     /tmp/install-rust
     git clone --depth 1 --no-checkout https://github.com/SeleniumHQ/selenium.git
@@ -24,5 +21,5 @@ else
     wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add - &&\
     echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list &&\
     apt update &&\
-    apt install -y google-chrome-stable firefox-esr
+    apt install -y google-chrome-stable firefox-esr chromium-driver
 fi

image/discourse_test/Dockerfile

@@ -36,4 +36,4 @@ RUN cd /var/www/discourse && sudo -E -u discourse -H bundle exec rake plugin:ins
     LOAD_PLUGINS=1 sudo -E -u discourse -H bundle exec rake plugin:install_all_gems &&\
     sudo -E -u discourse -H bundle exec ruby script/install_minio_binaries.rb
 
-ENTRYPOINT ["sudo", "-E", "-u", "discourse", "-H", "ruby", "script/docker_test.rb"]
+ENTRYPOINT ["sudo", "-E", "-u", "discourse", "-H", "ruby", "script/docker_test.rb"]

image/discourse_test/install-chrome

@@ -1,20 +1,14 @@
 #!/bin/bash
 set -e
 
-# https://googlechromelabs.github.io/chrome-for-testing/ doesn't provide linux/arm64 binaries for chrome or chromedriver
-# yet. Therefore on arm64, we install chromium instead of chrome and install a chromedriver for linux/arm64 from
-# https://github.com/electron/electron/releases/.
-#
-# On the current debian Chromium 120.0.6099.224 is installed so we have to install a chromedriver that is of the same version.
+# https://googlechromelabs.github.io/chrome-for-testing/ doesn't provide
+# linux/arm64 binaries for chrome or chromedriver yet. Therefore on arm64, we
+# install chromium instead of chrome.
 if [ "$(dpkg --print-architecture)" = "arm64" ]; then
-  apt update && apt install -y chromium unzip &&\
-    wget -q -O /tmp/chromedriver.zip https://github.com/electron/electron/releases/download/v28.2.2/chromedriver-v28.2.2-linux-arm64.zip &&\
-    unzip /tmp/chromedriver.zip -d /tmp/chromedriver &&\
-    mv /tmp/chromedriver/chromedriver /usr/bin &&\
-    rm -rf /tmp/chromedriver /tmp/chromedriver.zip
+  apt update && apt install -y chromium-driver
 else
   wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add - &&\
     echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list &&\
     apt update &&\
-    apt install -y google-chrome-stable
+    apt install -y google-chrome-stable chromium-driver
 fi