fix(prettier): stopped defining a direct prettier dependency, since that is expected with the config

Author: travi

README.md

@@ -20,6 +20,22 @@ form8ion plugin for projects that manage code style with prettier
   * [Dependencies](#dependencies)
   * [Verification](#verification)
 
+## Features
+
+* Configures prettier in the scaffolded project to extend the provided
+  [shareable config](https://prettier.io/docs/en/configuration.html#sharing-configurations)
+* Installs the provided shareable config
+* Installs the related eslint config and configures eslint to use it
+
+### Notes
+
+* prettier will only be configured if a config scope is defined
+* the shareable config is expected to define a dependency on `prettier`, so the
+  scaffolded project will not be configured to depend directly on `prettier`
+* the pretter and eslint config names are defined by convention, so packages
+  that are named as `@<your-scope>/prettier-config` and
+  `@<your-scope>/eslint-config-prettier` are expected to exist
+
 ## Usage
 
 <!--consumer-badges start -->

src/scaffolder-test.js

@@ -25,7 +25,7 @@ suite('scaffolder', () => {
 
     const {devDependencies, eslint} = await scaffold({config: {scope}, projectRoot});
 
-    assert.deepEqual(devDependencies, ['prettier', configPackageName]);
+    assert.deepEqual(devDependencies, [configPackageName]);
     assert.deepEqual(eslint, {configs: ['prettier']});
     assert.calledWith(
       configFile.write,

src/scaffolder.js

@@ -10,6 +10,6 @@ export default async function ({config, projectRoot}) {
 
   return {
     eslint: {configs: ['prettier']},
-    devDependencies: ['prettier', configPackageName]
+    devDependencies: [configPackageName]
   };
 }

test/integration/features/step_definitions/dependencies-steps.mjs

@@ -4,6 +4,5 @@ import {assert} from 'chai';
 Then('the dependencies are defined', async function () {
   const {devDependencies} = this.scaffoldResult;
 
-  assert.include(devDependencies, 'prettier');
   assert.include(devDependencies, `${this.scope}/prettier-config`);
 });