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/storage-plugin-image/index.js

@@ -0,0 +1,48 @@
+module.exports.command = 'storage-plugin-image'
+
+module.exports.describe = 'Start an image storage plugin unit.'
+
+module.exports.builder = function(yargs) {
+  var os = require('os')
+
+  return yargs
+    .env('STF_STORAGE_PLUGIN_IMAGE')
+    .strict()
+    .option('concurrency', {
+      alias: 'c'
+    , describe: 'Maximum number of simultaneous transformations.'
+    , type: 'number'
+    })
+    .option('port', {
+      alias: 'p'
+    , describe: 'The port to bind to.'
+    , type: 'number'
+    , default: process.env.PORT || 7100
+    })
+    .option('storage-url', {
+      alias: 'r'
+    , describe: 'URL to the storage unit.'
+    , type: 'string'
+    , demand: true
+    })
+    .option('cache-dir', {
+      describe: 'The location where to cache images.'
+    , type: 'string'
+    , default: os.tmpdir()
+    })
+    .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_STORAGE_PLUGIN_IMAGE_` (e.g. ' +
+      '`STF_STORAGE_PLUGIN_IMAGE_CONCURRENCY`).')
+}
+
+module.exports.handler = function(argv) {
+  var os = require('os')
+
+  return require('../../units/storage/plugins/image')({
+    port: argv.port
+  , storageUrl: argv.storageUrl
+  , cacheDir: argv.cacheDir
+  , concurrency: argv.concurrency || os.cpus().length
+  })
+}