chore: reuse parsing expression

analyzeCommits.js

@@ -2,6 +2,7 @@ const analyzeCommits = require('@semantic-release/commit-analyzer')
 const SemanticReleaseError = require('@semantic-release/error')
 const execSync = require('child_process').execSync;
 const lastTag = require('./lastTag');
+const utils = require('./utils');
 
 const until = f => array => {
   const first = array[0];
@@ -23,7 +24,7 @@ const lastTaggedRelease = () => {
 module.exports = function (pluginConfig, config, cb) {
   // run standard commit analysis
   return analyzeCommits(pluginConfig, config, function(error, type) {
-    const branch = config.env.TRAVIS_BRANCH || config.env.GIT_LOCAL_BRANCH ||  config.env.GITHUB_REF.split('/').slice(-1)[0];
+    const branch = config.env.TRAVIS_BRANCH || config.env.GIT_LOCAL_BRANCH ||  utils.ghParseBranch(config.env.GITHUB_REF);
     const branchTags = config.options.branchTags;
     const distTag = branchTags && branchTags[branch];
 

getLastRelease.js

@@ -1,6 +1,6 @@
 const defaultLastRelease = require('@semantic-release/last-release-npm');
 const lastTag = require('./lastTag');
-
+const utils = require('./utils');
 module.exports = function (pluginConfig, config, cb) {
   let branch;
   let oldTag;
@@ -8,7 +8,7 @@ module.exports = function (pluginConfig, config, cb) {
   if (config.env.TRAVIS) {
     branch = config.env.TRAVIS_BRANCH;
   } else if (config.env.GITHUB_REF) {
-    branch = config.env.GITHUB_REF.split('/').slice(-1)[0];
+    branch = utils.ghParseBranch(config.env.GITHUB_REF);
   } else {
     branch = config.env.GIT_LOCAL_BRANCH;
   }

utils.js

@@ -0,0 +1,6 @@
+let utils = {};
+
+utils.ghParseBranch = branch => branch.split('/').slice(-1)[0];
+
+module.exports = utils;
+

verifyConditions.js

@@ -1,3 +1,5 @@
+const utils = require('./utils');
+
 module.exports = function (pluginConfig, config, cb) {
   let branch;
   let defaultVerifyConditions;
@@ -7,7 +9,7 @@ module.exports = function (pluginConfig, config, cb) {
     branch = config.env.TRAVIS_BRANCH;
   } else if (config.env.GITHUB_REF) {
     defaultVerifyConditions = require('condition-github-actions');
-    branch = config.env.GITHUB_REF.split('/').slice(-1)[0];
+    branch = utils.ghParseBranch(config.env.GITHUB_REF);
   } else {
     defaultVerifyConditions = require('@krux/condition-jenkins');
     branch = config.env.GIT_LOCAL_BRANCH;