spring command

lib/packwerk/spring_command.rb

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+# typed: false
+
+require "spring/commands"
+
+module Packwerk
+  class SpringCommand
+    def env(*)
+      # Packwerk needs to run in a test environment, which has a set of autoload paths that are
+      # often a superset of the dev/prod paths (for example, test/support/helpers)
+      "test"
+    end
+
+    def exec_name
+      "packwerk"
+    end
+
+    def gem_name
+      "packwerk"
+    end
+
+    def call
+      load(Gem.bin_path(gem_name, exec_name))
+    end
+  end
+
+  Spring.register_command("packwerk", SpringCommand.new)
+end

test/unit/spring_command_test.rb

@@ -0,0 +1,20 @@
+# typed: ignore
+# frozen_string_literal: true
+
+require "test_helper"
+require "spring/commands"
+
+module Packwerk
+  class SpringCommandTest < Minitest::Test
+    test "registers command with Spring when loaded" do
+      require "packwerk/spring_command"
+
+      command = Spring.command("packwerk")
+
+      assert_not_nil(command, message: "packwerk command not registered with Spring")
+      assert_equal("packwerk", command.exec_name)
+      assert_equal("packwerk", command.gem_name)
+      assert_equal("test", command.env(nil))
+    end
+  end
+end