Add support for Taildrop (#165)

tailscale/DOCS.md

@@ -87,6 +87,14 @@ more severe level, e.g., `debug` also shows `info` messages. By default,
 the `log_level` is set to `info`, which is the recommended setting unless
 you are troubleshooting.
 
+## Taildrop
+
+This add-on support [Tailscale's Taildrop][taildrop] feature, which allows
+you to send files to your Home Assistant instance from other Tailscale
+devices.
+
+Received files are stored in the `/share/taildrop` directory.
+
 ## Changelog & Releases
 
 This repository keeps a change log using [GitHub's releases][releases]
@@ -157,3 +165,4 @@ SOFTWARE.
 [reddit]: https://reddit.com/r/homeassistant
 [releases]: https://github.com/hassio-addons/addon-tailscale/releases
 [semver]: https://semver.org/spec/v2.0.0.html
+[taildrop]: https://tailscale.com/taildrop/

tailscale/config.yaml

@@ -23,6 +23,8 @@ privileged:
 devices:
   - /dev/net/tun
 host_network: true
+map:
+  - share:rw
 schema:
   tags: ["match(^tag:[a-zA-Z0-9]-?[a-zA-Z0-9]+$)?"]
   log_level: list(trace|debug|info|notice|warning|error|fatal)?

tailscale/rootfs/etc/s6-overlay/s6-rc.d/taildrop/finish

@@ -0,0 +1,27 @@
+#!/command/with-contenv bashio
+# shellcheck shell=bash
+# ==============================================================================
+# Home Assistant Community Add-on: Tailscale
+# Take down the S6 supervision tree when Taildrop fails
+# ==============================================================================
+declare exit_code
+readonly exit_code_container=$(</run/s6-linux-init-container-results/exitcode)
+readonly exit_code_service="${1}"
+readonly exit_code_signal="${2}"
+readonly service="taildrop"
+
+bashio::log.info \
+  "Service ${service} exited with code ${exit_code_service}" \
+  "(by signal ${exit_code_signal})"
+
+if [[ "${exit_code_service}" -eq 256 ]]; then
+  if [[ "${exit_code_container}" -eq 0 ]]; then
+    echo $((128 + $exit_code_signal)) > /run/s6-linux-init-container-results/exitcode
+  fi
+  [[ "${exit_code_signal}" -eq 15 ]] && exec /run/s6/basedir/bin/halt
+elif [[ "${exit_code_service}" -ne 0 ]]; then
+  if [[ "${exit_code_container}" -eq 0 ]]; then
+    echo "${exit_code_service}" > /run/s6-linux-init-container-results/exitcode
+  fi
+  exec /run/s6/basedir/bin/halt
+fi

tailscale/rootfs/etc/s6-overlay/s6-rc.d/taildrop/run

@@ -0,0 +1,20 @@
+#!/command/with-contenv bashio
+# shellcheck shell=bash
+# ==============================================================================
+# Home Assistant Community Add-on: Tailscale
+# Fetches files send via Taildrop
+# ==============================================================================
+
+# Wait for the network to be available and logged in
+while ! bashio::fs.socket_exists "/var/run/tailscale/tailscaled.sock" || \
+  ! /opt/tailscale status --json --peers=false --self=false \
+    | jq --exit-status '.BackendState == "Running"' > /dev/null
+do
+  sleep 2
+done
+
+# Ensure the directory exists
+mkdir -p /share/taildrop
+
+# Fetch files
+exec /opt/tailscale file get --verbose --loop "/share/taildrop"

tailscale/rootfs/etc/s6-overlay/s6-rc.d/taildrop/type

@@ -0,0 +1 @@
+longrun

tailscale/rootfs/etc/s6-overlay/s6-rc.d/tailscaled/run

@@ -9,6 +9,7 @@ declare -a options
 bashio::log.info 'Starting Tailscale...'
 
 options+=(--state=/data/tailscaled.state)
+options+=(--statedir=/data/state)
 # Opt out of client log upload to log.tailscale.io
 options+=(--no-logs-no-support)
 options+=(--tun=userspace-networking)