meta-app-framework: start agl-compositor in a systemd user session

`weston-init` installs a system service for starting the compositor. As
we want it to run as a user service, this patch replaces this package
with `agl-compositor-init`. This involves:
- resetting RDEPENDS from `weston-ini-conf` so it doesn't pull in
  `weston-init` anymore
- making `agl-compositor-init` RCONFLICT with `weston-init` as it's
  still a RRECOMMENDS to `weston`

`agl-compositor-init` installs a systemd user service and socket, and
ensures agl-compositor is automatically started with the user session,
so the compositor is automatically started on boot. It also adds a
config fragment for the `agl-session@agl-driver` service (instance of
`agl-session` for user `agl-driver`) for properly configuring the TTY to
use for display.

Bug-AGL: SPEC-4161
Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
Change-Id: Ifb10a206cfa97c147283bc78c46f7f09209a9591
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/26975
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
Reviewed-by: Scott Murray <scott.murray@konsulko.com>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
ci-image-boot-test: Jenkins Job builder account

3 files changed, 49 insertions, 0 deletions

diff --git a/meta-app-framework/recipes-graphics/wayland/agl-compositor-init/agl-compositor.conf b/meta-app-framework/recipes-graphics/wayland/agl-compositor-init/agl-compositor.conf
new file mode 100644
index 000000000..66778a91b
--- /dev/null
+++ b/meta-app-framework/recipes-graphics/wayland/agl-compositor-init/agl-compositor.conf
@@ -0,0 +1,11 @@
+[Unit]
+ConditionPathExists=/dev/tty7
+
+[Service]
+Environment=XDG_SESSION_TYPE=wayland
+TTYPath=/dev/tty7
+TTYReset=yes
+TTYVHangup=yes
+TTYVTDisallocate=yes
+UtmpIdentifier=tty7
+UtmpMode=user
diff --git a/meta-app-framework/recipes-graphics/wayland/agl-compositor-init/agl-compositor.service.in b/meta-app-framework/recipes-graphics/wayland/agl-compositor-init/agl-compositor.service.in
new file mode 100644
index 000000000..2d0195184
--- /dev/null
+++ b/meta-app-framework/recipes-graphics/wayland/agl-compositor-init/agl-compositor.service.in
@@ -0,0 +1,28 @@
+#
+# Weston must be built with systemd support, and your weston.ini must load
+# the plugin systemd-notify.so.
+
+[Unit]
+Description=agl-compositor, a Wayland compositor, as a systemd user service
+Documentation=https://docs.automotivelinux.org/en/master/#5_Component_Documentation/1_agl-compositor/
+
+# Activate using a systemd socket
+Requires=agl-compositor.socket
+After=agl-compositor.socket
+
+# Since we are part of the agl session, make sure we are started before
+# it is complete.
+Before=agl-session.target
+
+[Service]
+Type=notify
+ExecStart=/usr/bin/agl-compositor @AGL_COMPOSITOR_ARGS@
+
+TimeoutStartSec=60
+WatchdogSec=20
+
+StandardOutput=journal
+StandardError=journal
+
+[Install]
+WantedBy=agl-session.target
diff --git a/meta-app-framework/recipes-graphics/wayland/agl-compositor-init/agl-compositor.socket b/meta-app-framework/recipes-graphics/wayland/agl-compositor-init/agl-compositor.socket
new file mode 100644
index 000000000..ef9769ff7
--- /dev/null
+++ b/meta-app-framework/recipes-graphics/wayland/agl-compositor-init/agl-compositor.socket
@@ -0,0 +1,10 @@
+#
+# Weston must be built with systemd support, and your weston.ini must load
+# the plugin systemd-notify.so.
+
+[Unit]
+Description=agl-compositor, a Wayland compositor, as a systemd user service
+Documentation=https://docs.automotivelinux.org/en/master/#5_Component_Documentation/1_agl-compositor/
+
+[Socket]
+ListenStream=%t/wayland-0