build: Add default (generic OIDC) snap package for the broker (#21)

Add snap packaging for the default version of the broker.

UDENG-2044

config/oidc-broker.broker → config/oidc-broker

@@ -1,12 +1,12 @@
 [authd]
 name = OIDC Broker
-brand_icon = broker_icon.png
-dbus_name = com.ubuntu.authd.oidc_broker
-dbus_object = /com/ubuntu/authd/oidc_broker
+brand_icon = {abs_path_to_icon}
+dbus_name = com.ubuntu.authd.OidcBroker
+dbus_object = /com/ubuntu/authd/OidcBroker
 
 [oidc]
 issuer = https://{issuer_url}
-client_id = client_id
+client_id = {client_id}
 
 # The amount of days the user will be allowed to authenticate without a network connection.
 offline_expiration = 180

snap/hooks/install

@@ -0,0 +1,24 @@
+#!/bin/sh
+set -eu
+
+snap_base_dir=$(dirname ${SNAP})
+
+cat <<EOF > ${SNAP_COMMON}/oidc-broker
+[authd]
+name = OIDC Broker
+brand_icon = ${snap_base_dir}/current/broker_icon.png
+dbus_name = com.ubuntu.authd.OidcBroker
+dbus_object = /com/ubuntu/authd/OidcBroker
+
+[oidc]
+issuer = https://{issuer_url}
+client_id = {client_id}
+
+# The amount of days the user will be allowed to authenticate without a network connection.
+# offline_expiration = 180
+
+# The directory where the user's home directory will be created.
+# The user home directory will be created in the format of {home_base_dir}/{username}
+# home_base_dir = /home
+
+EOF

snap/snapcraft.yaml

@@ -0,0 +1,40 @@
+name: oidc-broker
+summary: OIDC Broker for authd
+description: |
+  Broker that enables OIDC authentication for authd.
+version: git
+grade: stable
+base: core24
+confinement: strict
+license: GPL-3.0+
+
+apps:
+  oidc-broker:
+    command: bin/oidc-broker
+    daemon: simple
+    slots:
+      - dbus-oidc
+    plugs:
+      - network
+      - config-files
+    restart-condition: always
+
+slots:
+  dbus-oidc:
+    interface: dbus
+    bus: system
+    name: com.ubuntu.authd.OidcBroker
+
+plugs:
+  config-files:
+    interface: system-files
+    read:
+      - /etc/authd/brokers.d/oidc-broker
+
+parts:
+  oidc-broker:
+    source: .
+    source-type: local
+    plugin: go
+    build-snaps:
+      - go