feat: automate publish of patch tag

Automate publish of patch tag when PR is merged in `release-patch` tag.

Author: rosen-vladimirov

.travis.yml

@@ -2,6 +2,7 @@ branches:
   only:
     - master
     - release
+    - release-patch
 env:
   global:
   - DATE=$(date +%Y-%m-%d)
@@ -58,3 +59,10 @@ deploy:
     branch: release
   api_key:
     secure: "FM9QLOkFq6JpHlfHkT1i2Ht1ZlttZLq7K3kQNLabw7Z5+BPMcy/f3LRJkAkYMezrKLKRkq1uXmhY0BapoTnR9AVEO/t4g6dtbZ1TZ3xBH/HHnFofTFubOrc7+61DJzKduYtnQ/sn3EEOkN8jrXSY9uas4qZh7PSm1hcfjPI8gdI="
+provider: npm
+  skip_cleanup: true
+  email: [email protected]
+  on:
+    branch: release-patch
+  api_key:
+    secure: "FM9QLOkFq6JpHlfHkT1i2Ht1ZlttZLq7K3kQNLabw7Z5+BPMcy/f3LRJkAkYMezrKLKRkq1uXmhY0BapoTnR9AVEO/t4g6dtbZ1TZ3xBH/HHnFofTFubOrc7+61DJzKduYtnQ/sn3EEOkN8jrXSY9uas4qZh7PSm1hcfjPI8gdI="

.travis/add-publishConfig.js

@@ -2,20 +2,33 @@
 
 const fsModule = require("fs");
 const path = "./package.json";
-const fileOptions = {encoding: "utf-8"};
+const fileOptions = { encoding: "utf-8" };
 const content = fsModule.readFileSync(path, fileOptions);
 
 const packageDef = JSON.parse(content);
 if (!packageDef.publishConfig) {
-    packageDef.publishConfig = {};
+	packageDef.publishConfig = {};
 }
 
 const branch = process.argv[2];
 if (!branch) {
-    console.log("Please pass the branch name as an argument!");
-    process.exit(1);
+	console.log("Please pass the branch name as an argument!");
+	process.exit(1);
+}
+
+switch (branch) {
+	case "release":
+		packageDef.publishConfig.tag = "rc";
+		break;
+	case "release-patch":
+		packageDef.publishConfig.tag = "patch";
+		break;
+	case "master":
+		packageDef.publishConfig.tag = "next";
+		break;
+	default:
+		throw new Error(`Unable to publish as the branch ${branch} does not have corresponding tag. Supported branches are master (next tag), release (rc tag) and release-patch (patch tag)`);
 }
-packageDef.publishConfig.tag = branch === "release" ? "rc" : "next";
 
 const newContent = JSON.stringify(packageDef, null, "  ");
 fsModule.writeFileSync(path, newContent, fileOptions);