Ported CLI from commander to yargs because yargs suits our large CLI better and is easier to develop with. Split commands into separate files since the file was getting annoyingly long.

lib/cli/reaper/index.js

@@ -0,0 +1,50 @@
+module.exports.command = 'reaper [name]'
+
+module.exports.describe = 'Start a reaper unit.'
+
+module.exports.builder = function(yargs) {
+  var os = require('os')
+
+  return yargs
+    .env('STF_REAPER')
+    .strict()
+    .option('connect-push', {
+      alias: 'p'
+    , describe: 'Device-side ZeroMQ PULL endpoint to connect to.'
+    , array: true
+    , demand: true
+    })
+    .option('connect-sub', {
+      alias: 's'
+    , describe: 'App-side ZeroMQ PUB endpoint to connect to.'
+    , array: true
+    , demand: true
+    })
+    .option('heartbeat-timeout', {
+      alias: 't'
+    , describe: 'Consider devices with heartbeat older than the timeout ' +
+        'value dead. Given in milliseconds.'
+    , type: 'number'
+    , default: 30000
+    })
+    .option('name', {
+      describe: 'An easily identifiable name for log output.'
+    , type: 'string'
+    , default: os.hostname()
+    })
+    .epilog('Each option can be be overwritten with an environment variable ' +
+      'by converting the option to uppercase, replacing dashes with ' +
+      'underscores and prefixing it with `STF_REAPER_` (e.g. ' +
+      '`STF_REAPER_CONNECT_PUSH`).')
+}
+
+module.exports.handler = function(argv) {
+  return require('../../units/reaper')({
+    name: argv.name
+  , heartbeatTimeout: argv.heartbeatTimeout
+  , endpoints: {
+      push: argv.connectPush
+    , sub: argv.connectSub
+    }
+  })
+}