Add support for v8-canary, nightly and rc (#655)

src/distributions/installer-factory.ts

@@ -0,0 +1,31 @@
+import BaseDistribution from './base-distribution';
+import {NodeInputs} from './base-models';
+import NightlyNodejs from './nightly/nightly_builds';
+import OfficialBuilds from './official_builds/official_builds';
+import RcBuild from './rc/rc_builds';
+import CanaryBuild from './v8-canary/canary_builds';
+
+enum Distributions {
+  DEFAULT = '',
+  CANARY = 'v8-canary',
+  NIGHTLY = 'nightly',
+  RC = 'rc'
+}
+
+export function getNodejsDistribution(
+  installerOptions: NodeInputs
+): BaseDistribution {
+  const versionSpec = installerOptions.versionSpec;
+  let distribution: BaseDistribution;
+  if (versionSpec.includes(Distributions.NIGHTLY)) {
+    distribution = new NightlyNodejs(installerOptions);
+  } else if (versionSpec.includes(Distributions.CANARY)) {
+    distribution = new CanaryBuild(installerOptions);
+  } else if (versionSpec.includes(Distributions.RC)) {
+    distribution = new RcBuild(installerOptions);
+  } else {
+    distribution = new OfficialBuilds(installerOptions);
+  }
+
+  return distribution;
+}