feat: enable release channels

.travis.yml

@@ -28,4 +28,4 @@ after_success:
   - npm run semantic-release
 branches:
   except:
-    - "/^v\\d+\\.\\d+\\.\\d+$/"
+    - "/^v\\d+\\.\\d+\\.\\d+(\\-.*)?$/"

build/sr-analyzeCommits.js

@@ -0,0 +1,25 @@
+const analyzeCommits = require('@semantic-release/commit-analyzer')
+
+module.exports = function (pluginConfig, config, cb) {
+  // run standard commit analysis
+  return analyzeCommits(pluginConfig, config, function(error, type) {
+    const branch = config.env.TRAVIS_BRANCH;
+    const distTag = config.options.branchTags[branch];
+    let releaseType = type;
+
+    // if branch publishes a dist-tag
+    if (type && distTag) {
+      // map all types of releases to prereleases
+      releaseType = {
+        'major': 'premajor',
+        'minor': 'preminor',
+        'patch': 'prepatch'
+      }[type] || type;
+
+      console.log("Publishing a " + releaseType + " release.");
+    }
+
+    cb(error, releaseType);
+  });
+};
+

build/sr-verifyConditions.js

@@ -0,0 +1,19 @@
+const conditionTravis = require('@semantic-release/condition-travis');
+
+module.exports = function (pluginConfig, config, cb) {
+  const branch = config.env.TRAVIS_BRANCH;
+  const distTag = config.options.branchTags[branch];
+
+  // update semantic-release configuration to publish:
+  // - from this branch
+  // - with the specified dist tag
+  if (distTag) {
+    console.log(`Enable prerelease on dist-tag '${distTag}'.`);
+
+    config.options.branch = branch;
+    config.npm.tag = distTag;
+  }
+
+  // run default travis checks with the new configuration
+  return conditionTravis(pluginConfig, config, cb);
+};

build/sr-verifyRelease.js

@@ -0,0 +1,15 @@
+module.exports = function (pluginConfig, config, cb) {
+  if (config.nextRelease) {
+    // change version suffix of pre-releases from '-number' to '-tag.timestamp'
+    const now = new Date();
+    const timestamp = now.toISOString().replace(/[\-T\:]/g, "").slice(0,12);
+    const suffix = `-${config.npm.tag}.${timestamp}`;
+    const release = config.nextRelease;
+
+    release.version = release.version.replace(/\-.+$/, suffix);
+
+    console.log(`Ready for release v${release.version}`);
+  }
+
+  cb(null);
+};

package.json

@@ -16,6 +16,17 @@
   "publishConfig": {
     "registry": "https://registry.npm.telerik.com"
   },
+  "release": {
+    "branchTags": {
+      "develop": "dev"
+    },
+    "fallbackTags": {
+      "dev": "latest"
+    },
+    "verifyConditions": "./build/sr-verifyConditions",
+    "analyzeCommits": "./build/sr-analyzeCommits",
+    "verifyRelease": "./build/sr-verifyRelease"
+  },
   "scripts": {
     "lint": "sass-lint -v -c ./sass-lint.yml",
     "api": "sassdoc ./scss/",