Add shell_command component

homeassistant/components/shell_command.py

@@ -0,0 +1,48 @@
+"""
+homeassistant.components.shell_command
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Component to expose shell commands as services.
+
+shell_command:
+  restart_pow: touch ~/.pow/restart.txt
+
+"""
+import logging
+import subprocess
+
+from homeassistant.util import slugify
+
+DOMAIN = 'shell_command'
+DEPENDENCIES = []
+
+_LOGGER = logging.getLogger(__name__)
+
+
+def setup(hass, config):
+    """ Sets up the shell_command component. """
+    conf = config.get(DOMAIN)
+
+    if not isinstance(conf, dict):
+        _LOGGER.error('Expected configuration to be a dictionary')
+        return False
+
+    for name in conf.keys():
+        if name != slugify(name):
+            _LOGGER.error('Invalid service name: %s. Try %s',
+                          name, slugify(name))
+            return False
+
+    def service_handler(call):
+        """ Execute a shell command service. """
+        try:
+            subprocess.call(conf[call.service].split(' '),
+                            stdout=subprocess.DEVNULL,
+                            stderr=subprocess.DEVNULL)
+        except subprocess.SubprocessError:
+            _LOGGER.exception('Error running command')
+
+    for name in conf.keys():
+        hass.services.register(DOMAIN, name, service_handler)
+
+    return True