chore: replace prettier workspace property

packages/adders/eslint/config/adder.ts

@@ -33,7 +33,7 @@ export const adder = defineAdderConfig({
 			name: 'eslint-config-prettier',
 			version: '^9.1.0',
 			dev: true,
-			condition: ({ prettier }) => prettier
+			condition: ({ dependencyVersion }) => Boolean(dependencyVersion('prettier'))
 		}
 	],
 	files: [
@@ -141,7 +141,7 @@ export const adder = defineAdderConfig({
 		{
 			name: () => 'eslint.config.js',
 			contentType: 'script',
-			condition: ({ prettier }) => prettier,
+			condition: ({ dependencyVersion }) => Boolean(dependencyVersion('prettier')),
 			content: addEslintConfigPrettier
 		}
 	]

packages/adders/prettier/config/adder.ts

@@ -22,7 +22,7 @@ export const adder = defineAdderConfig({
 			name: 'eslint-config-prettier',
 			version: '^9.1.0',
 			dev: true,
-			condition: ({ dependencies }) => hasEslint(dependencies)
+			condition: ({ dependencyVersion }) => hasEslint(dependencyVersion)
 		}
 	],
 	files: [
@@ -69,13 +69,13 @@ export const adder = defineAdderConfig({
 		{
 			name: () => 'package.json',
 			contentType: 'json',
-			content: ({ data, dependencies }) => {
+			content: ({ data, dependencyVersion }) => {
 				data.scripts ??= {};
 				const scripts: Record<string, string> = data.scripts;
 				const CHECK_CMD = 'prettier --check .';
 				scripts['format'] ??= 'prettier --write .';
 
-				if (hasEslint(dependencies)) {
+				if (hasEslint(dependencyVersion)) {
 					scripts['lint'] ??= `${CHECK_CMD} && eslint .`;
 					if (!scripts['lint'].includes(CHECK_CMD)) scripts['lint'] += ` && ${CHECK_CMD}`;
 				} else {
@@ -86,17 +86,17 @@ export const adder = defineAdderConfig({
 		{
 			name: () => 'eslint.config.js',
 			contentType: 'script',
-			condition: ({ dependencies: deps }) => {
+			condition: ({ dependencyVersion }) => {
 				// We only want this to execute when it's `false`, not falsy
 
-				if (deps['eslint']?.startsWith(SUPPORTED_ESLINT_VERSION) === false) {
+				if (dependencyVersion('eslint')?.startsWith(SUPPORTED_ESLINT_VERSION) === false) {
 					log.warn(
 						`An older major version of ${colors.yellow(
 							'eslint'
 						)} was detected. Skipping ${colors.yellow('eslint-config-prettier')} installation.`
 					);
 				}
-				return hasEslint(deps);
+				return hasEslint(dependencyVersion);
 			},
 			content: addEslintConfigPrettier
 		}
@@ -105,6 +105,7 @@ export const adder = defineAdderConfig({
 
 const SUPPORTED_ESLINT_VERSION = '9';
 
-function hasEslint(deps: Record<string, string>): boolean {
-	return !!deps['eslint'] && deps['eslint'].startsWith(SUPPORTED_ESLINT_VERSION);
+function hasEslint(dependencyVersion: (pkg: string) => string | undefined): boolean {
+	const version = dependencyVersion('eslint');
+	return !!version && version.startsWith(SUPPORTED_ESLINT_VERSION);
 }

packages/adders/tailwindcss/config/adder.ts

@@ -31,7 +31,7 @@ export const adder = defineAdderConfig({
 			name: 'prettier-plugin-tailwindcss',
 			version: '^0.6.5',
 			dev: true,
-			condition: ({ prettier }) => prettier
+			condition: ({ dependencyVersion }) => Boolean(dependencyVersion('prettier'))
 		}
 	],
 	files: [
@@ -134,7 +134,7 @@ export const adder = defineAdderConfig({
 
 				if (!plugins.includes(PLUGIN_NAME)) plugins.push(PLUGIN_NAME);
 			},
-			condition: ({ prettier }) => prettier
+			condition: ({ dependencyVersion }) => Boolean(dependencyVersion('prettier'))
 		}
 	]
 });

packages/cli/commands/add.ts

@@ -340,7 +340,7 @@ export async function runAddCommand(options: Options, adders: string[]): Promise
 			let installed = false;
 			installed = dependent.config.packages.every(
 				// we'll skip the conditions since we don't have any options to supply it
-				(p) => p.condition !== undefined || !!workspace.dependencies[p.name]
+				(p) => p.condition !== undefined || !!workspace.dependencyVersion(p.name)
 			);
 
 			if (installed) continue;
@@ -463,7 +463,11 @@ export async function runAddCommand(options: Options, adders: string[]): Promise
 
 	// format modified/created files with prettier (if available)
 	const workspace = createWorkspace(options.cwd);
-	if (filesToFormat.length > 0 && depsStatus === 'installed' && workspace.prettier) {
+	if (
+		filesToFormat.length > 0 &&
+		depsStatus === 'installed' &&
+		!!workspace.dependencyVersion('prettier')
+	) {
 		const { start, stop } = p.spinner();
 		start('Formatting modified files');
 		try {

packages/core/files/workspace.ts

@@ -1,7 +1,6 @@
 import fs from 'node:fs';
 import path from 'node:path';
 import * as find from 'empathic/find';
-import * as resolve from 'empathic/resolve';
 import { AGENTS, detectSync, type AgentName } from 'package-manager-detector';
 import { type AstTypes, parseScript } from '@svelte-cli/ast-tooling';
 import { TESTING } from '../env.ts';
@@ -13,8 +12,13 @@ import process from 'node:process';
 export type Workspace<Args extends OptionDefinition> = {
 	options: OptionValues<Args>;
 	cwd: string;
-	dependencies: Record<string, string>;
-	prettier: boolean;
+	/**
+	 * Returns the dependency version declared in the package.json.
+	 * This may differ from the installed version.
+	 * @param pkg the package to check for
+	 * @returns the dependency version with any leading characters such as ^ or ~ removed
+	 */
+	dependencyVersion: (pkg: string) => string | undefined;
 	typescript: boolean;
 	kit: { libDirectory: string; routesDirectory: string } | undefined;
 	packageManager: AgentName;
@@ -24,7 +28,7 @@ export function createEmptyWorkspace<Args extends OptionDefinition>() {
 	return {
 		options: {},
 		cwd: '',
-		prettier: false,
+		dependencyVersion: (_pkg) => undefined,
 		typescript: false,
 		kit: undefined
 	} as Workspace<Args>;
@@ -45,17 +49,22 @@ export function createWorkspace<Args extends OptionDefinition>(cwd: string): Wor
 	}
 
 	const { data: packageJson } = getPackageJson(workspace);
-
-	workspace.dependencies = { ...packageJson.devDependencies, ...packageJson.dependencies };
+	const dependencies = { ...packageJson.devDependencies, ...packageJson.dependencies };
+
+	workspace.dependencyVersion = (pkg) => {
+		// TODO: support monorepos
+		// it would be nice to keep this working before the user has done an install
+		// we could go up checking all the package.json until we find a pnpm-workspace.yaml, etc.
+		const found = dependencies[pkg];
+		if (!found) {
+			return found;
+		}
+		// removes the version ranges (e.g. `^` is removed from: `^9.0.0`)
+		return found.replaceAll(/[^\d|.]/g, '');
+	};
 	workspace.typescript = usesTypescript;
-	workspace.prettier = Boolean(resolve.from(cwd, 'prettier', true));
 	workspace.packageManager = detectPackageManager(cwd);
-	if ('@sveltejs/kit' in workspace.dependencies) workspace.kit = parseKitOptions(workspace);
-	for (const [key, value] of Object.entries(workspace.dependencies)) {
-		// removes the version ranges (e.g. `^` is removed from: `^9.0.0`)
-		workspace.dependencies[key] = value.replaceAll(/[^\d|.]/g, '');
-	}
-
+	if ('@sveltejs/kit' in dependencies) workspace.kit = parseKitOptions(workspace);
 	return workspace;
 }