Enable rubocop on all files, with exceptions (#3005)

* Enable rubocop on all files

* Add a rubocop:install_hook task to make it easier to add the pre-commit hook

* use the same checkout task version as the test task

This is to try and figure out why the rubocop task is checking out the wrong SHA

* fix rubocop complaints with sdam_prose_spec

* make rubocop only lint the current branch (not a merge with master)

* trying to get rubocop to run in PR's again...

* ugh, issue is the `ref` being in the wrong place

* maybe the pull_request trigger is necessary after all...

* fix rubocop autocorrect failure

Author: jamis

.github/workflows/rubocop.yml

@@ -1,7 +1,5 @@
----
 name: Rubocop
-
-on: [push, pull_request]
+on: [ push, pull_request ]
 
 jobs:
   build:
@@ -10,7 +8,10 @@ jobs:
       CI: true
       TESTOPTS: "-v"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v2
+        with:
+          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          submodules: recursive
       - name: Set up Ruby 3.0
         uses: ruby/setup-ruby@v1
         with:

.rubocop.yml

@@ -1,3 +1,8 @@
+inherit_from: .rubocop_todo.yml
+inherit_mode:
+  merge:
+    - Exclude
+
 plugins:
   - rubocop-performance
   - rubocop-rake