scripts/signal/authorize.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+set -Eeuo pipefail
+
+if [[ "$(hostname)" != "jeeves" ]]; then
+  echo "Signal device authorization must run on jeeves." >&2
+  exit 1
+fi
+if [[ "$EUID" -ne 0 ]]; then
+  echo "Signal device authorization must run as root." >&2
+  exit 1
+fi
+if [[ "$#" -ne 1 ]]; then
+  echo "Usage: signal_authorize.sh DEVICE_URI" >&2
+  exit 2
+fi
+if [[ "$1" != sgnl://linkdevice\?* ]]; then
+  echo "Invalid Signal device link URI." >&2
+  exit 2
+fi
+
+service_name="signal-cli"
+data_dir="/var/lib/signal-cli"
+device_uri="$1"
+restart_service=false
+
+cleanup() {
+  if [[ "$restart_service" == true ]]; then
+    systemctl start "$service_name"
+  fi
+}
+trap cleanup EXIT
+
+restart_service=true
+systemctl stop "$service_name"
+runuser -u signal-cli -- \
+  signal-cli --data-dir "$data_dir" -a +12016554378 addDevice --uri "$device_uri"

scripts/signal/link.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+
+set -Eeuo pipefail
+
+host_name="$(hostname)"
+if [[ "$#" -ne 0 ]]; then
+  echo "Usage: signal_link.sh" >&2
+  exit 2
+fi
+
+service_name="signal-cli"
+data_dir="/var/lib/signal-cli"
+link_pid=""
+temp_dir=""
+restart_service=false
+
+cleanup() {
+  if [[ -n "$link_pid" ]] && kill -0 "$link_pid" 2>/dev/null; then
+    kill "$link_pid" 2>/dev/null || true
+    wait "$link_pid" 2>/dev/null || true
+  fi
+
+  if [[ -n "$temp_dir" ]]; then
+    rm -f -- "$temp_dir/link-uri"
+    rmdir -- "$temp_dir"
+  fi
+
+  if [[ "$restart_service" == true ]]; then
+    sudo systemctl start "$service_name"
+  fi
+}
+trap cleanup EXIT
+
+restart_service=true
+sudo systemctl stop "$service_name"
+
+temp_dir="$(mktemp -d)"
+link_fifo="$temp_dir/link-uri"
+mkfifo "$link_fifo"
+
+sudo -u signal-cli \
+  signal-cli --data-dir "$data_dir" link --name "$host_name" >"$link_fifo" &
+link_pid="$!"
+
+if ! IFS= read -r device_uri <"$link_fifo"; then
+  wait "$link_pid"
+  exit 1
+fi
+if [[ "$device_uri" != sgnl://linkdevice\?* ]]; then
+  echo "signal-cli returned an invalid device link URI." >&2
+  exit 1
+fi
+
+echo "Run this command manually on jeeves in another dotfiles dir:"
+printf "sudo ./scripts/signal/authorize.sh %q\n" "$device_uri"
+echo "Waiting for jeeves to authorize this device..."
+
+wait "$link_pid"
+link_pid=""
+echo "$host_name is now linked to the Signal account on jeeves."