feat(github): rest fallback for GHE issue retrieval

Falls back to REST api for issues retrieval if GHE version is < 2.17.0

lib/platform/github/index.js

@@ -1,5 +1,6 @@
 const is = require('@sindresorhus/is');
 const delay = require('delay');
+const semver = require('semver');
 const URL = require('url');
 
 const get = require('./gh-got-wrapper');
@@ -177,6 +178,8 @@ async function initRepo({
   try {
     res = await get(`repos/${repository}`);
     logger.trace({ repositoryDetails: res.body }, 'Repository details');
+    config.enterpriseVersion =
+      res.headers && res.headers['x-github-enterprise-version'];
     // istanbul ignore if
     if (res.body.fork && !includeForks) {
       try {
@@ -696,10 +699,39 @@ async function getGraphqlIssues(afterCursor = null) {
   }
 }
 
+// istanbul ignore next
+async function getRestIssues() {
+  logger.debug('Retrieving issueList');
+  const res = await get(
+    `repos/${config.repository}/issues?creator=${config.renovateUsername}&state=all&per_page=100&sort=created&direction=asc`,
+    { paginate: 'all', useCache: false }
+  );
+  // istanbul ignore if
+  if (!is.array(res.body)) {
+    logger.warn({ responseBody: res.body }, 'Could not retrieve issue list');
+    return [];
+  }
+  return res.body
+    .filter(issue => !issue.pull_request)
+    .map(i => ({
+      number: i.number,
+      state: i.state,
+      title: i.title,
+    }));
+}
+
 async function getIssueList() {
   if (!config.issueList) {
     logger.debug('Retrieving issueList');
-
+    const filterBySupportMinimumGheVersion = '2.17.0';
+    // istanbul ignore if
+    if (
+      config.enterpriseVersion &&
+      semver.lt(config.enterpriseVersion, filterBySupportMinimumGheVersion)
+    ) {
+      config.issueList = await getRestIssues();
+      return config.issueList;
+    }
     let [success, issues, cursor] = await getGraphqlIssues();
     config.issueList = [];
     while (success) {