Add support for downloading packs from GHES

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## [UNRELEASED]
 
 - Downloading CodeQL packs has been moved to the `init` step. Previously, CodeQL packs were downloaded during the `analyze` step. [#1218](https://github.com/github/codeql-action/pull/1218)
+- Allow CodeQL packs to be downloaded from GitHub Enterprise Server instances. [#1221](https://github.com/github/codeql-action/pull/1221)
 
 ## 2.1.21 - 25 Aug 2022
 

init/action.yml

@@ -10,9 +10,19 @@ inputs:
     description: The languages to be analysed
     required: false
   token:
+    description: GitHub token to use for authenticating with this instance of GitHub. To download custom packs from multiple registries, use registries-auth-tokens.
     default: ${{ github.token }}
+    required: false
+  registries:
+    description: |
+      Authenticate to GitHub Enterprise Server Container registries by passing a comma-separated list of <registry_url>=<token> pairs.
+
+      For example, you can pass `https://containers.GHEHOSTNAME1/v2/=TOKEN1,https://containers.GHEHOSTNAME2/v2/=TOKEN2`` to authenticate to two GitHub Enterprise Server instances.
+      This overrides the `token` input for pack downloads.
+    required: false
   matrix:
     default: ${{ toJson(matrix) }}
+    required: false
   config-file:
     description: Path of the config file to use
     required: false
@@ -32,7 +42,7 @@ inputs:
       analyses, you must specify packs in the codeql-config.yml file.
     required: false
   external-repository-token:
-    description: A token for fetching external config files and queries if they reside in a private repository.
+    description: A token for fetching external config files and queries if they reside in a private repository in the same GitHub instance that is running this action.
     required: false
   setup-python-dependencies:
     description: Try to auto-install your python dependencies
@@ -82,4 +92,4 @@ outputs:
 runs:
   using: 'node16'
   main: '../lib/init-action.js'
-  post: '../lib/init-action-post.js'
+  post: '../lib/init-action-post.js'