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-rw-r--r--nixos/modules/services/misc/home-assistant.nix36
-rw-r--r--nixos/tests/home-assistant.nix7
-rw-r--r--pkgs/servers/home-assistant/component-packages.nix431
-rw-r--r--pkgs/servers/home-assistant/default.nix20
-rwxr-xr-xpkgs/servers/home-assistant/parse-requirements.py97
5 files changed, 581 insertions, 10 deletions
diff --git a/nixos/modules/services/misc/home-assistant.nix b/nixos/modules/services/misc/home-assistant.nix
index bc463d3e670..4fbf5a412d1 100644
--- a/nixos/modules/services/misc/home-assistant.nix
+++ b/nixos/modules/services/misc/home-assistant.nix
@@ -6,6 +6,19 @@ let
   cfg = config.services.home-assistant;
 
   configFile = pkgs.writeText "configuration.yaml" (builtins.toJSON cfg.config);
+
+  availableComponents = pkgs.home-assistant.availableComponents;
+
+  # Returns whether component is used in config
+  useComponent = component: hasAttrByPath (splitString "." component) cfg.config;
+
+  # List of components used in config
+  extraComponents = filter useComponent availableComponents;
+
+  package = if cfg.autoExtraComponents
+    then (cfg.package.override { inherit extraComponents; })
+    else cfg.package;
+
 in {
   meta.maintainers = with maintainers; [ dotlambda ];
 
@@ -29,6 +42,7 @@ in {
           };
           frontend = { };
           http = { };
+          feedreader.urls = [ "https://nixos.org/blogs.xml" ];
         }
       '';
       description = ''
@@ -48,10 +62,22 @@ in {
       '';
       description = ''
         Home Assistant package to use.
-        Most Home Assistant components require additional dependencies,
-        which are best specified by overriding <literal>pkgs.home-assistant</literal>.
-        You can find the dependencies by searching for failed imports in your log or by looking at this list:
-        <link xlink:href="https://github.com/home-assistant/home-assistant/blob/master/requirements_all.txt"/>
+        Override <literal>extraPackages</literal> in order to add additional dependencies.
+      '';
+    };
+
+    autoExtraComponents = mkOption {
+      default = true;
+      type = types.bool;
+      description = ''
+        If set to <literal>true</literal>, the components used in <literal>config</config>
+        are set as the specified package's <literal>extraComponents</literal>.
+        This in turn adds all packaged dependencies to the derivation.
+        You might still see import errors in your log.
+        In this case, you will need to package the necessary dependencies yourself
+        or ask for someone else to package them.
+        If a dependency is packaged but not automatically added to this list,
+        you might need to specify it in <literal>extraPackages</literal>.
       '';
     };
   };
@@ -67,7 +93,7 @@ in {
       '';
       serviceConfig = {
         ExecStart = ''
-          ${cfg.package}/bin/hass --config "${cfg.configDir}"
+          ${package}/bin/hass --config "${cfg.configDir}"
         '';
         User = "hass";
         Group = "hass";
diff --git a/nixos/tests/home-assistant.nix b/nixos/tests/home-assistant.nix
index 0e2fee8e808..5d7e0ec65e7 100644
--- a/nixos/tests/home-assistant.nix
+++ b/nixos/tests/home-assistant.nix
@@ -17,13 +17,16 @@ in {
             homeassistant = {
               name = "Home";
               time_zone = "UTC";
+              latitude = "0.0";
+              longitude = "0.0";
+              elevation = 0;
             };
             frontend = { };
             http = { };
           };
         };
       };
-    };
+  };
 
   testScript = ''
     startAll;
@@ -37,5 +40,7 @@ in {
     $hass->waitForOpenPort(8123);
     $hass->succeed("curl --fail http://localhost:8123/states");
     $hass->succeed("curl --fail http://localhost:8123/api/ | grep 'API running'");
+
+    $hass->fail("cat ${configDir}/home-assistant.log | grep -qF ERROR");
   '';
 })
diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
new file mode 100644
index 00000000000..679ca2afd43
--- /dev/null
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -0,0 +1,431 @@
+# Generated from parse-requirements.py
+# Do not edit!
+
+{
+  version = "0.62.1";
+  components = {
+    "nuimo_controller" = ps: with ps; [  ];
+    "bbb_gpio" = ps: with ps; [  ];
+    "doorbird" = ps: with ps; [  ];
+    "isy994" = ps: with ps; [  ];
+    "notify.html5" = ps: with ps; [ pyjwt ];
+    "sensor.mvglive" = ps: with ps; [  ];
+    "arduino" = ps: with ps; [  ];
+    "xiaomi_aqara" = ps: with ps; [  ];
+    "rpi_gpio" = ps: with ps; [  ];
+    "remember_the_milk" = ps: with ps; [ httplib2 ];
+    "media_player.sonos" = ps: with ps; [  ];
+    "sensor.travisci" = ps: with ps; [  ];
+    "notify.twitter" = ps: with ps; [  ];
+    "notify.yessssms" = ps: with ps; [  ];
+    "abode" = ps: with ps; [  ];
+    "device_tracker.automatic" = ps: with ps; [  ];
+    "sensor.dnsip" = ps: with ps; [ aiodns ];
+    "emulated_hue" = ps: with ps; [ aiohttp-cors ];
+    "http" = ps: with ps; [ aiohttp-cors ];
+    "sensor.imap" = ps: with ps; [  ];
+    "light.lifx" = ps: with ps; [  ];
+    "scene.hunterdouglas_powerview" = ps: with ps; [  ];
+    "alarmdecoder" = ps: with ps; [  ];
+    "sensor.alpha_vantage" = ps: with ps; [  ];
+    "amcrest" = ps: with ps; [  ];
+    "media_player.anthemav" = ps: with ps; [  ];
+    "apcupsd" = ps: with ps; [  ];
+    "notify.apns" = ps: with ps; [  ];
+    "asterisk_mbox" = ps: with ps; [  ];
+    "light.avion" = ps: with ps; [  ];
+    "axis" = ps: with ps; [  ];
+    "tts.baidu" = ps: with ps; [  ];
+    "sensor.modem_callerid" = ps: with ps; [  ];
+    "sensor.linux_battery" = ps: with ps; [ batinfo ];
+    "sensor.eddystone_temperature" = ps: with ps; [  ];
+    "device_tracker.linksys_ap" = ps: with ps; [ beautifulsoup4 ];
+    "sensor.geizhals" = ps: with ps; [ beautifulsoup4 ];
+    "sensor.scrape" = ps: with ps; [ beautifulsoup4 ];
+    "sensor.sytadin" = ps: with ps; [ beautifulsoup4 ];
+    "zha" = ps: with ps; [  ];
+    "blink" = ps: with ps; [  ];
+    "light.blinksticklight" = ps: with ps; [ BlinkStick ];
+    "light.blinkt" = ps: with ps; [  ];
+    "sensor.bitcoin" = ps: with ps; [  ];
+    "light.decora" = ps: with ps; [  ];
+    "sensor.bme680" = ps: with ps; [  ];
+    "notify.aws_lambda" = ps: with ps; [ boto3 ];
+    "notify.aws_sns" = ps: with ps; [ boto3 ];
+    "notify.aws_sqs" = ps: with ps; [ boto3 ];
+    "tts.amazon_polly" = ps: with ps; [ boto3 ];
+    "sensor.broadlink" = ps: with ps; [  ];
+    "switch.broadlink" = ps: with ps; [  ];
+    "sensor.buienradar" = ps: with ps; [  ];
+    "weather.buienradar" = ps: with ps; [  ];
+    "calendar.caldav" = ps: with ps; [  ];
+    "notify.ciscospark" = ps: with ps; [  ];
+    "coinbase" = ps: with ps; [  ];
+    "sensor.coinmarketcap" = ps: with ps; [  ];
+    "alarm_control_panel.concord232" = ps: with ps; [  ];
+    "binary_sensor.concord232" = ps: with ps; [  ];
+    "sensor.crimereports" = ps: with ps; [  ];
+    "datadog" = ps: with ps; [ datadog ];
+    "sensor.metoffice" = ps: with ps; [  ];
+    "weather.metoffice" = ps: with ps; [  ];
+    "light.decora_wifi" = ps: with ps; [  ];
+    "device_tracker.upc_connect" = ps: with ps; [ defusedxml ];
+    "sensor.deluge" = ps: with ps; [  ];
+    "switch.deluge" = ps: with ps; [  ];
+    "media_player.denonavr" = ps: with ps; [  ];
+    "media_player.directv" = ps: with ps; [  ];
+    "sensor.discogs" = ps: with ps; [ discogs_client ];
+    "notify.discord" = ps: with ps; [  ];
+    "updater" = ps: with ps; [ distro ];
+    "switch.digitalloggers" = ps: with ps; [  ];
+    "notify.xmpp" = ps: with ps; [ pyasn1-modules pyasn1 sleekxmpp ];
+    "sensor.dovado" = ps: with ps; [  ];
+    "sensor.dsmr" = ps: with ps; [  ];
+    "dweet" = ps: with ps; [  ];
+    "sensor.dweet" = ps: with ps; [  ];
+    "sensor.eliqonline" = ps: with ps; [  ];
+    "enocean" = ps: with ps; [  ];
+    "sensor.envirophat" = ps: with ps; [  ];
+    "sensor.season" = ps: with ps; [ ephem ];
+    "keyboard_remote" = ps: with ps; [  ];
+    "climate.honeywell" = ps: with ps; [  ];
+    "image_processing.dlib_face_detect" = ps: with ps; [  ];
+    "image_processing.dlib_face_identify" = ps: with ps; [  ];
+    "sensor.fastdotcom" = ps: with ps; [  ];
+    "sensor.fedex" = ps: with ps; [  ];
+    "feedreader" = ps: with ps; [ feedparser ];
+    "sensor.geo_rss_events" = ps: with ps; [ feedparser ];
+    "sensor.fitbit" = ps: with ps; [  ];
+    "sensor.fixer" = ps: with ps; [  ];
+    "light.flux_led" = ps: with ps; [  ];
+    "notify.free_mobile" = ps: with ps; [  ];
+    "device_tracker.fritz" = ps: with ps; [  ];
+    "sensor.fritzbox_callmonitor" = ps: with ps; [  ];
+    "sensor.fritzbox_netmonitor" = ps: with ps; [  ];
+    "switch.fritzdect" = ps: with ps; [  ];
+    "media_player.frontier_silicon" = ps: with ps; [  ];
+    "conversation" = ps: with ps; [  ];
+    "tts.google" = ps: with ps; [  ];
+    "device_tracker.bluetooth_le_tracker" = ps: with ps; [  ];
+    "sensor.gearbest" = ps: with ps; [  ];
+    "sensor.gitter" = ps: with ps; [  ];
+    "notify.gntp" = ps: with ps; [  ];
+    "google" = ps: with ps; [ google_api_python_client oauth2client ];
+    "sensor.google_travel_time" = ps: with ps; [  ];
+    "sensor.gpsd" = ps: with ps; [  ];
+    "light.greenwave" = ps: with ps; [  ];
+    "media_player.gstreamer" = ps: with ps; [  ];
+    "ffmpeg" = ps: with ps; [  ];
+    "media_player.philips_js" = ps: with ps; [  ];
+    "mqtt.server" = ps: with ps; [ hbmqtt ];
+    "climate.heatmiser" = ps: with ps; [  ];
+    "switch.hikvisioncam" = ps: with ps; [  ];
+    "notify.hipchat" = ps: with ps; [  ];
+    "binary_sensor.workday" = ps: with ps; [  ];
+    "frontend" = ps: with ps; [ user-agents ];
+    "camera.onvif" = ps: with ps; [  ];
+    "sensor.dht" = ps: with ps; [  ];
+    "media_player.braviatv" = ps: with ps; [  ];
+    "media_player.spotify" = ps: with ps; [  ];
+    "netatmo" = ps: with ps; [  ];
+    "neato" = ps: with ps; [  ];
+    "sensor.sabnzbd" = ps: with ps; [  ];
+    "switch.anel_pwrctrl" = ps: with ps; [  ];
+    "switch.edimax" = ps: with ps; [  ];
+    "sensor.gtfs" = ps: with ps; [  ];
+    "binary_sensor.flic" = ps: with ps; [  ];
+    "media_player.lg_netcast" = ps: with ps; [  ];
+    "sensor.bh1750" = ps: with ps; [  ];
+    "sensor.bme280" = ps: with ps; [  ];
+    "sensor.htu21d" = ps: with ps; [  ];
+    "light.iglo" = ps: with ps; [  ];
+    "ihc" = ps: with ps; [  ];
+    "influxdb" = ps: with ps; [ influxdb ];
+    "sensor.influxdb" = ps: with ps; [ influxdb ];
+    "insteon_local" = ps: with ps; [  ];
+    "insteon_plm" = ps: with ps; [  ];
+    "verisure" = ps: with ps; [  ];
+    "media_player.kodi" = ps: with ps; [  ];
+    "notify.kodi" = ps: with ps; [  ];
+    "device_tracker.owntracks" = ps: with ps; [ libnacl ];
+    "device_tracker.owntracks_http" = ps: with ps; [ libnacl ];
+    "dyson" = ps: with ps; [  ];
+    "camera.foscam" = ps: with ps; [  ];
+    "device_tracker.mikrotik" = ps: with ps; [  ];
+    "media_player.soundtouch" = ps: with ps; [ libsoundtouch ];
+    "light.lifx_legacy" = ps: with ps; [  ];
+    "light.osramlightify" = ps: with ps; [  ];
+    "light.limitlessled" = ps: with ps; [  ];
+    "linode" = ps: with ps; [ linode-api ];
+    "media_player.liveboxplaytv" = ps: with ps; [  ];
+    "lametric" = ps: with ps; [  ];
+    "notify.lametric" = ps: with ps; [  ];
+    "sensor.luftdaten" = ps: with ps; [  ];
+    "sensor.lyft" = ps: with ps; [  ];
+    "notify.matrix" = ps: with ps; [ matrix-client ];
+    "maxcube" = ps: with ps; [  ];
+    "notify.message_bird" = ps: with ps; [  ];
+    "sensor.mfi" = ps: with ps; [  ];
+    "switch.mfi" = ps: with ps; [  ];
+    "sensor.miflora" = ps: with ps; [  ];
+    "upnp" = ps: with ps; [  ];
+    "sensor.mopar" = ps: with ps; [  ];
+    "tts" = ps: with ps; [ mutagen ];
+    "mychevy" = ps: with ps; [  ];
+    "mycroft" = ps: with ps; [  ];
+    "usps" = ps: with ps; [  ];
+    "media_player.nad" = ps: with ps; [  ];
+    "media_player.nadtcp" = ps: with ps; [  ];
+    "discovery" = ps: with ps; [ netdisco ];
+    "sensor.neurio_energy" = ps: with ps; [  ];
+    "sensor.nederlandse_spoorwegen" = ps: with ps; [  ];
+    "nuheat" = ps: with ps; [  ];
+    "binary_sensor.trend" = ps: with ps; [ numpy ];
+    "image_processing.opencv" = ps: with ps; [ numpy ];
+    "climate.oem" = ps: with ps; [  ];
+    "media_player.onkyo" = ps: with ps; [  ];
+    "sensor.openevse" = ps: with ps; [  ];
+    "media_player.openhome" = ps: with ps; [  ];
+    "switch.orvibo" = ps: with ps; [  ];
+    "mqtt" = ps: with ps; [ paho-mqtt ];
+    "shiftr" = ps: with ps; [ paho-mqtt ];
+    "media_player.panasonic_viera" = ps: with ps; [  ];
+    "media_player.dunehd" = ps: with ps; [  ];
+    "device_tracker.aruba" = ps: with ps; [ pexpect ];
+    "device_tracker.asuswrt" = ps: with ps; [ pexpect ];
+    "device_tracker.cisco_ios" = ps: with ps; [ pexpect ];
+    "device_tracker.unifi_direct" = ps: with ps; [ pexpect ];
+    "media_player.pandora" = ps: with ps; [ pexpect ];
+    "hue" = ps: with ps; [  ];
+    "rpi_pfio" = ps: with ps; [  ];
+    "light.piglow" = ps: with ps; [  ];
+    "pilight" = ps: with ps; [  ];
+    "dominos" = ps: with ps; [  ];
+    "media_player.plex" = ps: with ps; [  ];
+    "sensor.plex" = ps: with ps; [  ];
+    "sensor.mhz19" = ps: with ps; [  ];
+    "sensor.serial_pm" = ps: with ps; [  ];
+    "sensor.pocketcasts" = ps: with ps; [  ];
+    "climate.proliphix" = ps: with ps; [  ];
+    "prometheus" = ps: with ps; [  ];
+    "sensor.systemmonitor" = ps: with ps; [ psutil ];
+    "wink" = ps: with ps; [  ];
+    "notify.pushbullet" = ps: with ps; [ pushbullet ];
+    "sensor.pushbullet" = ps: with ps; [ pushbullet ];
+    "notify.pushetta" = ps: with ps; [  ];
+    "light.rpi_gpio_pwm" = ps: with ps; [  ];
+    "canary" = ps: with ps; [  ];
+    "sensor.cpuspeed" = ps: with ps; [  ];
+    "camera.synology" = ps: with ps; [  ];
+    "hdmi_cec" = ps: with ps; [  ];
+    "light.tplink" = ps: with ps; [  ];
+    "switch.tplink" = ps: with ps; [  ];
+    "rfxtrx" = ps: with ps; [  ];
+    "sensor.tibber" = ps: with ps; [  ];
+    "switch.dlink" = ps: with ps; [  ];
+    "ads" = ps: with ps; [  ];
+    "sensor.airvisual" = ps: with ps; [  ];
+    "alarm_control_panel.alarmdotcom" = ps: with ps; [  ];
+    "arlo" = ps: with ps; [  ];
+    "apple_tv" = ps: with ps; [  ];
+    "device_tracker.bbox" = ps: with ps; [  ];
+    "sensor.bbox" = ps: with ps; [  ];
+    "device_tracker.bluetooth_tracker" = ps: with ps; [  ];
+    "media_player.cast" = ps: with ps; [ PyChromecast ];
+    "media_player.cmus" = ps: with ps; [  ];
+    "comfoconnect" = ps: with ps; [  ];
+    "tts.microsoft" = ps: with ps; [  ];
+    "sensor.cups" = ps: with ps; [  ];
+    "daikin" = ps: with ps; [  ];
+    "climate.daikin" = ps: with ps; [  ];
+    "deconz" = ps: with ps; [  ];
+    "zwave" = ps: with ps; [ pydispatcher ];
+    "android_ip_webcam" = ps: with ps; [  ];
+    "sensor.ebox" = ps: with ps; [  ];
+    "climate.econet" = ps: with ps; [  ];
+    "eight_sleep" = ps: with ps; [  ];
+    "media_player.emby" = ps: with ps; [  ];
+    "envisalink" = ps: with ps; [  ];
+    "climate.ephember" = ps: with ps; [  ];
+    "sensor.fido" = ps: with ps; [  ];
+    "climate.flexit" = ps: with ps; [  ];
+    "ifttt" = ps: with ps; [  ];
+    "remote.harmony" = ps: with ps; [  ];
+    "binary_sensor.hikvision" = ps: with ps; [  ];
+    "hive" = ps: with ps; [  ];
+    "homematic" = ps: with ps; [ pyhomematic ];
+    "sensor.hydroquebec" = ps: with ps; [  ];
+    "alarm_control_panel.ialarm" = ps: with ps; [  ];
+    "device_tracker.icloud" = ps: with ps; [  ];
+    "sensor.irish_rail_transport" = ps: with ps; [  ];
+    "binary_sensor.iss" = ps: with ps; [  ];
+    "remote.itach" = ps: with ps; [  ];
+    "kira" = ps: with ps; [  ];
+    "sensor.kwb" = ps: with ps; [  ];
+    "sensor.lacrosse" = ps: with ps; [  ];
+    "sensor.lastfm" = ps: with ps; [ pylast ];
+    "media_player.webostv" = ps: with ps; [ websockets ];
+    "notify.webostv" = ps: with ps; [  ];
+    "litejet" = ps: with ps; [  ];
+    "sensor.loopenergy" = ps: with ps; [  ];
+    "lutron_caseta" = ps: with ps; [  ];
+    "lutron" = ps: with ps; [  ];
+    "notify.mailgun" = ps: with ps; [  ];
+    "mochad" = ps: with ps; [  ];
+    "modbus" = ps: with ps; [  ];
+    "media_player.monoprice" = ps: with ps; [  ];
+    "media_player.yamaha_musiccast" = ps: with ps; [  ];
+    "cover.myq" = ps: with ps; [  ];
+    "mysensors" = ps: with ps; [  ];
+    "lock.nello" = ps: with ps; [  ];
+    "device_tracker.netgear" = ps: with ps; [  ];
+    "switch.netio" = ps: with ps; [  ];
+    "lock.nuki" = ps: with ps; [  ];
+    "sensor.nut" = ps: with ps; [  ];
+    "alarm_control_panel.nx584" = ps: with ps; [  ];
+    "binary_sensor.nx584" = ps: with ps; [  ];
+    "iota" = ps: with ps; [  ];
+    "sensor.otp" = ps: with ps; [  ];
+    "sensor.openweathermap" = ps: with ps; [  ];
+    "weather.openweathermap" = ps: with ps; [  ];
+    "qwikswitch" = ps: with ps; [  ];
+    "rainbird" = ps: with ps; [  ];
+    "climate.sensibo" = ps: with ps; [  ];
+    "sensor.serial" = ps: with ps; [  ];
+    "switch.acer_projector" = ps: with ps; [ pyserial ];
+    "lock.sesame" = ps: with ps; [  ];
+    "sensor.sma" = ps: with ps; [  ];
+    "device_tracker.snmp" = ps: with ps; [ pysnmp ];
+    "sensor.snmp" = ps: with ps; [ pysnmp ];
+    "switch.snmp" = ps: with ps; [ pysnmp ];
+    "sensor.thinkingcleaner" = ps: with ps; [  ];
+    "switch.thinkingcleaner" = ps: with ps; [  ];
+    "sensor.blockchain" = ps: with ps; [  ];
+    "media_player.clementine" = ps: with ps; [  ];
+    "digital_ocean" = ps: with ps; [ digital-ocean ];
+    "ecobee" = ps: with ps; [  ];
+    "climate.eq3btsmart" = ps: with ps; [  ];
+    "sensor.etherscan" = ps: with ps; [  ];
+    "sensor.darksky" = ps: with ps; [  ];
+    "weather.darksky" = ps: with ps; [  ];
+    "gc100" = ps: with ps; [  ];
+    "sensor.hp_ilo" = ps: with ps; [  ];
+    "joaoapps_join" = ps: with ps; [  ];
+    "notify.joaoapps_join" = ps: with ps; [  ];
+    "juicenet" = ps: with ps; [  ];
+    "lirc" = ps: with ps; [  ];
+    "fan.xiaomi_miio" = ps: with ps; [  ];
+    "light.xiaomi_miio" = ps: with ps; [  ];
+    "switch.xiaomi_miio" = ps: with ps; [  ];
+    "vacuum.xiaomi_miio" = ps: with ps; [  ];
+    "media_player.mpd" = ps: with ps; [  ];
+    "light.mystrom" = ps: with ps; [  ];
+    "switch.mystrom" = ps: with ps; [  ];
+    "nest" = ps: with ps; [  ];
+    "device_tracker.nmap_tracker" = ps: with ps; [  ];
+    "notify.pushover" = ps: with ps; [  ];
+    "sensor.ripple" = ps: with ps; [  ];
+    "media_player.roku" = ps: with ps; [  ];
+    "sensor.sochain" = ps: with ps; [  ];
+    "sensor.synologydsm" = ps: with ps; [  ];
+    "tado" = ps: with ps; [  ];
+    "telegram_bot" = ps: with ps; [  ];
+    "sensor.twitch" = ps: with ps; [  ];
+    "velbus" = ps: with ps; [  ];
+    "media_player.vlc" = ps: with ps; [  ];
+    "sensor.swiss_public_transport" = ps: with ps; [  ];
+    "alarm_control_panel.egardia" = ps: with ps; [  ];
+    "sensor.whois" = ps: with ps; [  ];
+    "device_tracker.tile" = ps: with ps; [  ];
+    "climate.touchline" = ps: with ps; [  ];
+    "device_tracker.trackr" = ps: with ps; [  ];
+    "tradfri" = ps: with ps; [  ];
+    "device_tracker.unifi" = ps: with ps; [  ];
+    "keyboard" = ps: with ps; [  ];
+    "vera" = ps: with ps; [  ];
+    "media_player.vizio" = ps: with ps; [  ];
+    "velux" = ps: with ps; [  ];
+    "wemo" = ps: with ps; [  ];
+    "camera.xeoma" = ps: with ps; [  ];
+    "zabbix" = ps: with ps; [  ];
+    "sensor.qnap" = ps: with ps; [  ];
+    "switch.rachio" = ps: with ps; [  ];
+    "climate.radiotherm" = ps: with ps; [  ];
+    "raincloud" = ps: with ps; [  ];
+    "raspihats" = ps: with ps; [  ];
+    "switch.rainmachine" = ps: with ps; [  ];
+    "python_script" = ps: with ps; [  ];
+    "rflink" = ps: with ps; [  ];
+    "ring" = ps: with ps; [  ];
+    "notify.rocketchat" = ps: with ps; [  ];
+    "vacuum.roomba" = ps: with ps; [  ];
+    "switch.rpi_rf" = ps: with ps; [  ];
+    "media_player.russound_rnet" = ps: with ps; [  ];
+    "media_player.russound_rio" = ps: with ps; [  ];
+    "media_player.yamaha" = ps: with ps; [  ];
+    "media_player.samsungtv" = ps: with ps; [  ];
+    "satel_integra" = ps: with ps; [  ];
+    "sensor.deutsche_bahn" = ps: with ps; [  ];
+    "scsgate" = ps: with ps; [  ];
+    "notify.sendgrid" = ps: with ps; [  ];
+    "light.sensehat" = ps: with ps; [  ];
+    "sensor.sensehat" = ps: with ps; [  ];
+    "media_player.aquostv" = ps: with ps; [  ];
+    "sensor.shodan" = ps: with ps; [  ];
+    "notify.simplepush" = ps: with ps; [  ];
+    "alarm_control_panel.simplisafe" = ps: with ps; [  ];
+    "skybell" = ps: with ps; [  ];
+    "notify.slack" = ps: with ps; [  ];
+    "sleepiq" = ps: with ps; [  ];
+    "media_player.snapcast" = ps: with ps; [  ];
+    "sensor.speedtest" = ps: with ps; [  ];
+    "recorder" = ps: with ps; [ sqlalchemy ];
+    "statsd" = ps: with ps; [ statsd ];
+    "sensor.steam_online" = ps: with ps; [  ];
+    "tahoma" = ps: with ps; [  ];
+    "sensor.tank_utility" = ps: with ps; [  ];
+    "binary_sensor.tapsaff" = ps: with ps; [  ];
+    "tellstick" = ps: with ps; [  ];
+    "tellduslive" = ps: with ps; [  ];
+    "sensor.temper" = ps: with ps; [  ];
+    "tesla" = ps: with ps; [  ];
+    "thingspeak" = ps: with ps; [  ];
+    "light.tikteck" = ps: with ps; [  ];
+    "calendar.todoist" = ps: with ps; [ todoist ];
+    "toon" = ps: with ps; [  ];
+    "alarm_control_panel.totalconnect" = ps: with ps; [  ];
+    "sensor.transmission" = ps: with ps; [ transmissionrpc ];
+    "switch.transmission" = ps: with ps; [ transmissionrpc ];
+    "twilio" = ps: with ps; [ twilio ];
+    "sensor.uber" = ps: with ps; [  ];
+    "sensor.ups" = ps: with ps; [  ];
+    "camera.uvc" = ps: with ps; [  ];
+    "climate.venstar" = ps: with ps; [  ];
+    "volvooncall" = ps: with ps; [  ];
+    "sensor.vasttrafik" = ps: with ps; [  ];
+    "vultr" = ps: with ps; [ vultr ];
+    "wake_on_lan" = ps: with ps; [  ];
+    "switch.wake_on_lan" = ps: with ps; [  ];
+    "sensor.waqi" = ps: with ps; [  ];
+    "cloud" = ps: with ps; [  ];
+    "waterfurnace" = ps: with ps; [  ];
+    "media_player.gpmdp" = ps: with ps; [  ];
+    "spc" = ps: with ps; [ websockets ];
+    "zigbee" = ps: with ps; [  ];
+    "sensor.xbox_live" = ps: with ps; [  ];
+    "knx" = ps: with ps; [  ];
+    "media_player.bluesound" = ps: with ps; [ xmltodict ];
+    "sensor.swiss_hydrological_data" = ps: with ps; [ xmltodict ];
+    "sensor.ted5000" = ps: with ps; [ xmltodict ];
+    "sensor.yr" = ps: with ps; [ xmltodict ];
+    "sensor.yahoo_finance" = ps: with ps; [  ];
+    "sensor.yweather" = ps: with ps; [  ];
+    "weather.yweather" = ps: with ps; [  ];
+    "light.yeelight" = ps: with ps; [  ];
+    "light.yeelightsunflower" = ps: with ps; [  ];
+    "media_extractor" = ps: with ps; [  ];
+    "light.zengge" = ps: with ps; [  ];
+    "zeroconf" = ps: with ps; [ zeroconf ];
+    "media_player.ziggo_mediabox_xl" = ps: with ps; [  ];
+  };
+}
diff --git a/pkgs/servers/home-assistant/default.nix b/pkgs/servers/home-assistant/default.nix
index 9ec314e5c73..bce0369cb52 100644
--- a/pkgs/servers/home-assistant/default.nix
+++ b/pkgs/servers/home-assistant/default.nix
@@ -1,4 +1,5 @@
 { stdenv, fetchFromGitHub, python3
+, extraComponents ? []
 , extraPackages ? ps: []
 , skipPip ? true }:
 
@@ -24,14 +25,25 @@ let
     };
   };
 
+  componentPackages = import ./component-packages.nix;
+
+  availableComponents = builtins.attrNames componentPackages.components;
+
+  getPackages = component: builtins.getAttr component componentPackages.components;
+
+  componentBuildInputs = map (component: getPackages component py.pkgs) extraComponents;
+
   # Ensure that we are using a consistent package set
   extraBuildInputs = extraPackages py.pkgs;
 
+  # Don't forget to run parse-requirements.py after updating
+  hassVersion = "0.62.1";
+
 in with py.pkgs; buildPythonApplication rec {
   pname = "homeassistant";
-  version = "0.62.1";
+  version = assert (componentPackages.version == hassVersion); hassVersion;
 
-  diabled = !isPy3k;
+  inherit availableComponents;
 
   # PyPI tarball is missing tests/ directory
   src = fetchFromGitHub {
@@ -45,8 +57,8 @@ in with py.pkgs; buildPythonApplication rec {
     # From setup.py
     requests pyyaml pytz pip jinja2 voluptuous typing aiohttp yarl async-timeout chardet astral certifi
     # From the components that are part of the default configuration.yaml
-    sqlalchemy aiohttp-cors hass-frontend user-agents distro mutagen xmltodict netdisco 
-  ] ++ extraBuildInputs;
+    sqlalchemy aiohttp-cors hass-frontend user-agents distro mutagen xmltodict netdisco
+  ] ++ componentBuildInputs ++ extraBuildInputs;
 
   checkInputs = [
     pytest requests-mock pydispatcher pytest-aiohttp
diff --git a/pkgs/servers/home-assistant/parse-requirements.py b/pkgs/servers/home-assistant/parse-requirements.py
new file mode 100755
index 00000000000..aa293921e87
--- /dev/null
+++ b/pkgs/servers/home-assistant/parse-requirements.py
@@ -0,0 +1,97 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i python3 -p "python3.withPackages (ps: with ps; [ setuptools ])"
+#
+# This script downloads https://github.com/home-assistant/home-assistant/blob/master/requirements_all.txt.
+# This file contains lines of the form
+#
+#     # homeassistant.components.foo
+#     # homeassistant.components.bar
+#     foobar==1.2.3
+#
+# i.e. it lists dependencies and the components that require them.
+# By parsing the file, a dictionary mapping component to dependencies is created.
+# For all of these dependencies, Nixpkgs' python3Packages are searched for appropriate names.
+# Then, a Nix attribute set mapping component name to dependencies is created.
+
+from urllib.request import urlopen
+import subprocess
+import os
+import sys
+import json
+import re
+from pkg_resources import Requirement, RequirementParseError
+
+PREFIX = '# homeassistant.components.'
+PKG_SET = 'python3Packages'
+
+def get_version():
+    with open(os.path.dirname(sys.argv[0]) + '/default.nix') as f:
+        m = re.search('hassVersion = "([\\d\\.]+)";', f.read())
+        return m.group(1)
+
+def fetch_reqs(version='master'):
+    requirements = {}
+    with urlopen('https://github.com/home-assistant/home-assistant/raw/{}/requirements_all.txt'.format(version)) as response:
+        components = []
+        for line in response.read().decode().splitlines():
+            if line == '':
+                components = []
+            elif line[:len(PREFIX)] == PREFIX:
+                component = line[len(PREFIX):]
+                components.append(component)
+                if component not in requirements:
+                    requirements[component] = []
+            elif line[0] != '#':
+                for component in components:
+                    requirements[component].append(line)
+    return requirements
+
+# Store a JSON dump of Nixpkgs' python3Packages
+output = subprocess.check_output(['nix-env', '-f', os.path.dirname(sys.argv[0]) + '/../../..', '-qa', '-A', PKG_SET, '--json'])
+packages = json.loads(output)
+
+def name_to_attr_path(req):
+    attr_paths = []
+    pattern = re.compile('python3\\.6-{}-\\d'.format(req), re.I)
+    for attr_path, package in packages.items():
+        if pattern.match(package['name']):
+            attr_paths.append(attr_path)
+    # Let's hope there's only one derivation with a matching name
+    assert(len(attr_paths) <= 1)
+    if attr_paths:
+        return attr_paths[0]
+    else:
+        return None
+
+version = get_version()
+requirements = fetch_reqs(version=version)
+build_inputs = {}
+for component, reqs in requirements.items():
+    attr_paths = []
+    for req in reqs:
+        try:
+            name = Requirement.parse(req).project_name
+            attr_path = name_to_attr_path(name)
+            if attr_path is not None:
+                # Add attribute path without "python3Packages." prefix
+                attr_paths.append(attr_path[len(PKG_SET + '.'):])
+        except RequirementParseError:
+            continue
+    else:
+        build_inputs[component] = attr_paths
+
+# Only select components which have any dependency
+#build_inputs = {k: v for k, v in build_inputs.items() if len(v) > 0}
+
+with open(os.path.dirname(sys.argv[0]) + '/component-packages.nix', 'w') as f:
+    f.write('# Generated from parse-requirements.py\n')
+    f.write('# Do not edit!\n\n')
+    f.write('{\n')
+    f.write('  version = "{}";\n'.format(version))
+    f.write('  components = {\n')
+    for component, attr_paths in build_inputs.items():
+        f.write('    "{}" = ps: with ps; [ '.format(component))
+        f.write(' '.join(attr_paths))
+        f.write(' ];\n')
+    f.write('  };\n')
+    f.write('}\n')