Add option to count errors if files were bumped to true

lib/spoom/cli/bump.rb

@@ -26,6 +26,8 @@ class Bump < Thor
         desc: "Only change specified list (one file by line)"
       option :suggest_bump_command, type: :string,
         desc: "Command to suggest if files can be bumped"
+      option :count_errors, type: :boolean, default: false,
+        desc: "Count the number of errors if all files were bumped"
       sig { params(directory: String).void }
       def bump(directory = ".")
         in_sorbet_project!
@@ -48,6 +50,11 @@ def bump(directory = ".")
           exit(1)
         end
 
+        if options[:count_errors] && !dry
+          say_error("`--count-errors` can only be used with `--dry`")
+          exit(1)
+        end
+
         say("Checking files...")
 
         directory = File.expand_path(directory)
@@ -95,6 +102,8 @@ def bump(directory = ".")
 
         undo_changes(files_with_errors, from)
 
+        say("Found #{errors.length} type checking error#{'s' if errors.length > 1}") if options[:count_errors]
+
         files_changed = files_to_bump - files_with_errors
         print_changes(files_changed, command: cmd, from: from, to: to, dry: dry, path: exec_path)
         undo_changes(files_to_bump, from) if dry

test/spoom/cli/bump_test.rb

@@ -367,6 +367,48 @@ class A; end
         assert_equal("true", Sorbet::Sigils.file_strictness("#{@project.path}/file1.rb"))
         assert_equal("false", Sorbet::Sigils.file_strictness("#{@project.path}/vendor/file2.rb"))
       end
+
+      def test_count_errors_without_dry
+        @project.write("file1.rb", <<~RB)
+          # typed: false
+          class Foo
+            def foo
+            end
+          end
+
+          Foo.new.foos
+        RB
+
+        out, err, status = @project.bundle_exec("spoom bump --no-color --count-errors")
+        assert_empty(out)
+        assert_equal(<<~OUT, err)
+          Error: `--count-errors` can only be used with `--dry`
+        OUT
+        refute(status)
+      end
+
+      def test_bump_count_errors
+        @project.write("file1.rb", <<~RB)
+          # typed: false
+          class Foo
+            def foo
+            end
+          end
+
+          Foo.new.foos
+        RB
+
+        out, err, status = @project.bundle_exec("spoom bump --no-color --count-errors --dry")
+        assert_empty(err)
+        assert_equal(<<~OUT, out)
+          Checking files...
+
+          Found 1 type checking error
+          No file to bump from `false` to `true`
+        OUT
+        assert(status)
+        assert_equal("false", Sorbet::Sigils.file_strictness("#{@project.path}/file1.rb"))
+      end
     end
   end
 end