Split out Rubocop into a dedicated job and only run once

.github/workflows/ci.yml

@@ -9,6 +9,19 @@ on:
     branches:
       - '*'
 jobs:
+  rubocop:
+    name: Rubocop
+    runs-on: 'ubuntu-20.04'
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.0'
+      - run: script/update_rubygems_and_install_bundler
+      - run: bundle install --standalone
+      - run: bundle binstubs --all
+      - run: script/run_rubocop
+
   test:
     name: 'Ruby: ${{ matrix.ruby }}, Rails: ${{ matrix.env.RAILS_VERSION }}'
     runs-on: ubuntu-20.04

.rubocop.yml

@@ -5,7 +5,9 @@ AllCops:
   Exclude:
     # Templates are really ERB which Rubocop does not parse
     - bin/**/*
+    - bundle/**/*
     - lib/generators/rspec/*/templates/**/*
+    - tmp/**/*
 
 Bundler/DuplicatedGem:
   Enabled: false

script/predicate_functions.sh

@@ -97,11 +97,3 @@ function documentation_enforced {
     return 1
   fi
 }
-
-function style_and_lint_enforced {
- if [ -x ./bin/rubocop ]; then
-   return 0
- else
-   return 1
- fi
-}

script/run_build

@@ -26,10 +26,6 @@ if documentation_enforced; then
   fold "doc check" check_documentation_coverage
 fi
 
-if style_and_lint_enforced; then
-  fold "rubocop" check_style_and_lint
-fi
-
 if is_mri; then
   fold "one-by-one specs" run_specs_one_by_one
   run_all_spec_suites

script/run_rubocop

@@ -0,0 +1,14 @@
+#!/bin/bash
+# This file was generated on 2022-01-10T22:24:10+00:00 from the rspec-dev repo.
+# DO NOT modify it by hand as your changes will get lost the next time it is generated.
+
+set -e
+source script/functions.sh
+
+# Allow repos to override the default functions and add their own
+if [ -f script/custom_build_functions.sh ]; then
+  source script/custom_build_functions.sh
+fi
+
+
+fold "rubocop" check_style_and_lint