From ea2fb77104144749e91867d42c8aec0b0a44f769 Mon Sep 17 00:00:00 2001
From: jmarlena <6732600+jmarlena@users.noreply.github.com>
Date: Wed, 15 Sep 2021 12:43:53 -0700
Subject: [PATCH 1/2] Early access Importer docs follow-up-1 (#21538)

* Trigger builds

* Trigger builds

From 6a490ed8bba276fac6aa64dcdd7b1445c6ef55c6 Mon Sep 17 00:00:00 2001
From: Grace Park <gracepark@github.com>
Date: Wed, 15 Sep 2021 13:24:33 -0700
Subject: [PATCH 2/2] Adding next next version support (#21481)

* adding next next version support

* adding check for next next version

* update to use semver
---
 lib/enterprise-server-releases.js |  2 ++
 tests/linting/lint-files.js       | 39 +++++++++++++++++++++++++++++--
 2 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/lib/enterprise-server-releases.js b/lib/enterprise-server-releases.js
index 207067cfc5..86b90c6bd2 100644
--- a/lib/enterprise-server-releases.js
+++ b/lib/enterprise-server-releases.js
@@ -11,6 +11,7 @@ export const dates = JSON.parse(
 
 // Some frontmatter may contain the upcoming GHES release number
 export const next = '3.3'
+export const nextNext = '3.4'
 
 export const supported = ['3.2', '3.1', '3.0', '2.22']
 export const deprecated = [
@@ -78,6 +79,7 @@ export const getPreviousReleaseNumber = (releaseNum) => {
 
 export default {
   next,
+  nextNext,
   supported,
   deprecated,
   legacyAssetVersions,
diff --git a/tests/linting/lint-files.js b/tests/linting/lint-files.js
index 4510e13578..4b70d61ce5 100644
--- a/tests/linting/lint-files.js
+++ b/tests/linting/lint-files.js
@@ -19,10 +19,12 @@ import renderContent from '../../lib/render-content/index.js'
 import getApplicableVersions from '../../lib/get-applicable-versions.js'
 import { execSync } from 'child_process'
 import { allVersions } from '../../lib/all-versions.js'
-import { supported, next, deprecated } from '../../lib/enterprise-server-releases.js'
+import { supported, next, nextNext, deprecated } from '../../lib/enterprise-server-releases.js'
 import { getLiquidConditionals } from '../../script/helpers/get-liquid-conditionals.js'
 import allowedVersionOperators from '../../lib/liquid-tags/ifversion-supported-operators.js'
 import { isExperimental } from '../helpers/is-experimental.js'
+import semver from 'semver'
+
 const __dirname = path.dirname(fileURLToPath(import.meta.url))
 const enterpriseServerVersions = Object.keys(allVersions).filter((v) =>
   v.startsWith('enterprise-server@')
@@ -1106,12 +1108,25 @@ function validateIfversionConditionals(conds) {
             `Found a "${operator}" operator inside "${cond}", but "${operator}" is not supported`
           )
         }
+        // Check nextNext is one version ahead of next
+        if (!isNextVersion(next, nextNext)) {
+          errors.push(
+            `The nextNext version: "${nextNext} is not one version ahead of the next supported version: "${next}" - check lib/enterprise-server-releases.js`
+          )
+        }
         // Check that the versions in conditionals are supported
         // versions of GHES or the first deprecated version. Allowing
         // the first deprecated version to exist in code ensures
         // allows us to deprecate the version before removing
         // the old liquid content.
-        if (!(supported.includes(release) || release === next || deprecated[0] === release)) {
+        if (
+          !(
+            supported.includes(release) ||
+            release === next ||
+            release === nextNext ||
+            deprecated[0] === release
+          )
+        ) {
           errors.push(
             `Found ${release} inside "${cond}", but ${release} is not a supported GHES release`
           )
@@ -1122,3 +1137,23 @@ function validateIfversionConditionals(conds) {
 
   return errors
 }
+
+function isNextVersion(v1, v2) {
+  const semverNext = semver.coerce(v1)
+  const semverNextNext = semver.coerce(v2)
+  const semverSupported = []
+
+  supported.forEach((el, i) => {
+    semverSupported[i] = semver.coerce(el)
+  })
+  // Check that the next version is the next version from the supported list first
+  const maxVersion = semver.maxSatisfying(semverSupported, '*').raw
+  const nextVersionCheck =
+    semverNext.raw === semver.inc(maxVersion, 'minor') ||
+    semverNext.raw === semver.inc(maxVersion, 'major')
+  return (
+    nextVersionCheck &&
+    (semver.inc(semverNext, 'minor') === semverNextNext.raw ||
+      semver.inc(semverNext, 'major') === semverNextNext.raw)
+  )
+}