Add script for bulk autocorrect with Rubocop

We also had an old script which wasn't used and needed manual steps.

script/rubocop-autocorrect.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+#
+# Fixes safe cops automatically and creates a commit for each.
+#
+
+if git add --dry-run --all | grep --quiet .; then
+  echo "Dirty working tree. Please start on a fresh branch."
+  exit 1
+fi
+
+# Refresh todo file so that following commits include only related changes:
+bundle exec rubocop --regenerate-todo
+git commit --all --message "Regenerate Rubocop's TODO file"
+
+# Iterate over all safe cops:
+grep "This cop supports safe autocorrection" -A 5 .rubocop_todo.yml\
+  | grep '^[A-Z]'\
+  | tr -d :\
+  | while read cop; do
+      echo "Trying to autocorrect safely: $cop"
+      bundle exec rubocop --regenerate-todo --except "$cop"
+
+      echo "Safely autocorrect $cop\n" > .git/COMMIT_EDITMSG
+      bundle exec rubocop --autocorrect >> .git/COMMIT_EDITMSG
+      git add --all
+      git commit --file .git/COMMIT_EDITMSG
+    done

script/rubocop_autocorrect

@@ -1,19 +0,0 @@
-#!/bin/sh
-
-# Usage
-#
-# 1. Clean any git unstagged or untracked changes. Consider creating a new branch
-# 2. Remove a cop's exclusion paragraph from the .rubocop_todo.yml
-# 3. Run:
-#
-#   $ ./script/rubocop_autocorrect <removed_cop_name>
-#
-# This will commit all the changes.
-
-set -e
-
-COP="$1"
-
-bundle exec rubocop -a --only "$COP"
-git add -A
-git commit -m "Auto correct Rubocop's ${COP} cop"