Implement Podman-based Docker Compose projects

roles/podman/files/docker-host.sh

@@ -0,0 +1,22 @@
+# shellcheck shell=sh
+: "${UID:=$(id -u)}"
+
+if [ "$UID" -ne 0 ]; then
+	if [ -z "$XDG_RUNTIME_DIR" ] && [ -d "/run/user/$UID" ]; then
+		XDG_RUNTIME_DIR="/run/user/$UID"
+		export XDG_RUNTIME_DIR
+	fi
+
+	PODMAN_SOCKET="$XDG_RUNTIME_DIR/podman/podman.sock"
+	if [ -S "$PODMAN_SOCKET" ]; then
+		DOCKER_HOST="unix://$PODMAN_SOCKET"
+		export DOCKER_HOST
+	fi
+
+	if [ -z "$DBUS_SESSION_BUS_ADDRESS" ]; then
+		if [ -S "$XDG_RUNTIME_DIR/bus" ]; then
+			DBUS_SESSION_BUS_ADDRESS="unix:path=$XDG_RUNTIME_DIR/bus"
+			export DBUS_SESSION_BUS_ADDRESS
+		fi
+	fi
+fi