Install Playwright to control Firefox

[Playwright] is a cross-browser automation framework, intended for
automating browser-based GUI application tests.  It also works as a
general remote-control tool for automating basically anything having to
do with a browser.

Playwright requires a special Firefox binary that it manages itself.  To
avoid downloading and installing Playwright and Firefox, and thus
storing them in memory, we need them to be already available in the
rootfs image.  Since I want the control software to be updated easily,
without rebooting the machine, I decided to separate it into its own
project, [Voonex].  A short shell script to install/update and run it is
launched by the systemd user instance.

[Playwright]: https://playwright.dev/
[Voonex]: https://git.pyrocufflink.blue/dustin/voonex

ci/Dockerfile

@@ -10,6 +10,7 @@ RUN dnf install -y \
     findutils \
     make \
     openssh-clients \
+    python3-pip \
     rsync \
     squashfs-tools \
     tar \

mkrootfs.sh

@@ -19,7 +19,6 @@ echo install_weak_deps=False >> "${destdir}"/etc/dnf/dnf.conf
 dnf --installroot "${destdir}" install -y \
     bcm2711-firmware \
     dracut-network \
-    firefox \
     hostname \
     kmod \
     mesa-dri-drivers \
@@ -65,6 +64,21 @@ chroot "${destdir}" systemctl enable \
     systemd-timesyncd \
     xinit@user
 
+if ! [ -f "${destdir}"/usr/local/bin/playwright ]; then
+    python3 -m pip \
+        install \
+        --prefix "${destdir}"/usr/local \
+        playwright
+fi
+if ! [ -d "${destdir}"/usr/local/ms-playwright ]; then
+    py_site_dir=$(
+        "${destdir}"/usr/bin/python3 -c 'import site;print(site.getsitepackages()[0])'
+    )
+    PLAYWRIGHT_BROWSERS_PATH="${destdir}"/usr/local/ms-playwright \
+    PYTHONPATH="${destdir}${py_site_dir}" \
+    python3 -m playwright install firefox
+fi
+
 umask 0022
 mksquashfs "${destdir}" "${destdir}/boot/${dest}" \
     -comp lz4 \

overlay/etc/systemd/system/xinit@.service

@@ -14,7 +14,7 @@ TTYPath=/dev/tty7
 StandardInput=tty
 StandardOutput=journal
 StandardError=journal
-ExecStart=/usr/bin/startx
+ExecStart=/usr/bin/startx -- -nocursor
 Restart=always
 
 [Install]

overlay/etc/systemd/user/basementhud.service

@@ -0,0 +1,7 @@
+[Unit]
+Description=Basement HUD
+
+[Service]
+Type=simple
+Environment=PLAYWRIGHT_BROWSERS_PATH=/usr/local/ms-playwright
+ExecStart=/usr/local/bin/basementhud

overlay/etc/systemd/user/firefox.service

@@ -1,9 +0,0 @@
-[Unit]
-Description=Firefox web browser
-
-[Service]
-Type=simple
-ExecStart=/usr/bin/firefox
-Restart=always
-StandardInput=null
-StandardOutput=journal

overlay/etc/systemd/user/graphical.target

@@ -1,4 +0,0 @@
-[Unit]
-Description=Graphical Interface
-After=default.target
-AllowIsolate=yes

overlay/etc/systemd/user/graphical.target.wants/firefox.service

@@ -1 +0,0 @@
-../firefox.service

overlay/home/user/.xinitrc

@@ -3,5 +3,5 @@
 xset s off
 xset -dpms
 systemctl --user import-environment DISPLAY
-systemctl --user start graphical.target
+systemctl --user start basementhud.service
 exec openbox

overlay/usr/local/bin/basementhud

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+python3 -m ensurepip
+python3 -m pip install -U pip
+python3 -m pip install \
+    --user \
+    --find-links https://files.pyrocufflink.blue/wheels/voonex \
+    --upgrade \
+    voonex
+exec python3 -m voonex