First development of the deploy action (#6)

Deploy js code to an instance of screeps.
Some debugging tools are implemented.

Reviewed-on: #6
Co-authored-by: Philipp Horstenkamp <philipp@horstenkamp.de>
Co-committed-by: Philipp Horstenkamp <philipp@horstenkamp.de>

node_modules/prebuild-install/asset.js

@@ -0,0 +1,48 @@
+var get = require('simple-get')
+var util = require('./util')
+var proxy = require('./proxy')
+var noop = Object.assign({
+  http: function () {},
+  silly: function () {}
+}, require('noop-logger'))
+
+function findAssetId (opts, cb) {
+  var downloadUrl = util.getDownloadUrl(opts)
+  var apiUrl = util.getApiUrl(opts)
+  var log = opts.log || noop
+
+  log.http('request', 'GET ' + apiUrl)
+  var reqOpts = proxy({
+    url: apiUrl,
+    json: true,
+    headers: {
+      'User-Agent': 'simple-get',
+      Authorization: 'token ' + opts.token
+    }
+  }, opts)
+
+  var req = get.concat(reqOpts, function (err, res, data) {
+    if (err) return cb(err)
+    log.http(res.statusCode, apiUrl)
+    if (res.statusCode !== 200) return cb(err)
+
+    // Find asset id in release
+    for (var release of data) {
+      if (release.tag_name === 'v' + opts.pkg.version) {
+        for (var asset of release.assets) {
+          if (asset.browser_download_url === downloadUrl) {
+            return cb(null, asset.id)
+          }
+        }
+      }
+
+      cb(new Error('Could not find GitHub release for version'))
+    }
+  })
+
+  req.setTimeout(30 * 1000, function () {
+    req.abort()
+  })
+}
+
+module.exports = findAssetId