fix: format a fresh copy with its own linter, generated names can exceed the line width

README.md

@@ -1,8 +1,6 @@
 # frontend-svelte
 
-Copier template for a SvelteKit frontend, either as a `frontend/` part next to other parts or alone at the root of the project (`layout`): SvelteKit on Bun with Tailwind v4, ultracite (biome) and optional shadcn-svelte, served by a Bun server with SSR, as a static SPA behind `serve.ts`, or as a static SPA that the backend api serves from `frontend/build`.
-
-Ships `frontend/docker-compose.yml` with root-relative paths and profiles per service, `docker-compose.override.yml.example` (the `caddy` network aliases, copied by `make env`), a `Makefile` with `fmt`, `check`, `build` and `dev`, `.env.example`, `CLAUDE.md`, `.claude/rules` for Svelte and ultracite. The Svelte MCP server comes from `infra`. Applied on top of the `infra` template, `layout: parts` or `layout: single` respectively.
+Copier template for a SvelteKit frontend on Bun with Tailwind v4, biome or ESLint + Prettier and optional shadcn-svelte: SSR on Bun, a static SPA behind `serve.ts`, or a static SPA served by the backend api. A `frontend/` part or the whole project (`layout`), on top of `infra`.
 
 ```sh
 copier copy --trust -d project_name="My Thing" -d serve=bun <this-repo> <dest>

copier.yml

@@ -37,6 +37,14 @@ ui_library:
     shadcn-svelte: shadcn
   default: none
 
+linter:
+  type: str
+  help: Linter and formatter
+  choices:
+    Biome with the ultracite preset: biome
+    ESLint + Prettier (the sv create setup): eslint
+  default: biome
+
 install_deps:
   type: bool
   help: bun install after generation
@@ -58,4 +66,6 @@ prefix:
   default: "{{ 'frontend/' if layout == 'part' else '' }}"
 
 _tasks:
-  - "{% if _copier_operation == 'copy' and install_deps %}sh -c 'cd {{ part_dir }} && bun install'{% else %}true{% endif %}"
+  # Generated values (project name) can push lines past the formatter width,
+  # so every fresh copy is formatted once by its own linter.
+  - "{% if _copier_operation == 'copy' and install_deps %}sh -c 'cd {{ part_dir }} && bun install && bun --bun run fix'{% else %}true{% endif %}"

template/.claude/settings.json.jinja

@@ -4,7 +4,7 @@
       {
         "hooks": [
           {
-            "command": "{% if layout == 'part' %}cd frontend && {% endif %}bun run fix --skip=correctness/noUnusedImports",
+            "command": "{% if layout == 'part' %}cd frontend && {% endif %}bun run fix{% if linter == 'biome' %} --skip=correctness/noUnusedImports{% endif %}",
             "type": "command"
           }
         ],

template/{{ part_dir }}/.dockerignore

@@ -1,5 +1,7 @@
 node_modules
 .svelte-kit
 build
-.env
+# .env goes into the build: $env/static/public (and static/private) are
+# inlined at build time from it. It stays in the builder stage, the runtime
+# image gets build/ only. Local overrides (.env.local and the like) stay out.
 .env.*

template/{{ part_dir }}/Makefile.jinja

@@ -1,9 +1,6 @@
 COMPOSE := {% if layout == 'part' %}cd .. && {% endif %}docker compose
-{% if serve != 'api' %}IMAGE := {{ project_slug }}/frontend
-{% endif %}changed = ! git diff --quiet $(1) -- $(2) 2>/dev/null
-stamp = { git update-ref $(1) HEAD 2>/dev/null || true; }
 
-.PHONY: {% if layout == 'root' %}env recreate rebuild restart logs down deploy {% endif %}fmt check build pre-deploy post-deploy dev
+.PHONY: {% if layout == 'root' %}env recreate rebuild restart logs down {% endif %}fmt check build dev
 
 fmt:
 	bun run fix
@@ -16,14 +13,6 @@ build:
 {% if serve == 'api' %}	$(COMPOSE) run --rm frontend-dev sh -c "bun install && bun run build"
 {% else %}	$(COMPOSE) build frontend
 {% endif %}
-pre-deploy:
-	@if $(call changed,refs/deploy/frontend,.) || {% if serve == 'api' %}! test -d build{% else %}! docker image inspect $(IMAGE) >/dev/null 2>&1{% endif %}; then \
-		$(MAKE) build && $(call stamp,refs/deploy/frontend); \
-	fi
-
-post-deploy:
-	@:
-
 dev:
 	bun run dev
 {% if layout == 'root' %}
@@ -52,8 +41,4 @@ logs:
 
 down:
 	$(COMPOSE) down
-
-deploy: pre-deploy
-	$(COMPOSE) up -d
-	$(MAKE) post-deploy
 {% endif %}

template/{{ part_dir }}/docker-compose.yml.jinja

@@ -1,7 +1,7 @@
 services:
 {% if serve != 'api' %}  frontend:
     build: {{ part_dir }}
-    image: {{ project_slug }}/frontend
+    image: {{ project_slug | replace('_', '-') }}/frontend
     profiles: [frontend, services]
     restart: unless-stopped
     env_file:

template/{{ part_dir }}/package.json.jinja

@@ -3,31 +3,53 @@
   "version": "0.0.1",
   "private": true,
   "type": "module",
+  "imports": {
+    "#lib": "./src/lib/index.js",
+    "#lib/*": "./src/lib/*"
+  },
   "scripts": {
     "build": "vite build",
     "check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
     "check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
     "dev": "vite dev",
+{%- if linter == 'biome' %}
     "fix": "ultracite fix",
     "lint": "ultracite check",
+{%- else %}
+    "fix": "prettier --write . && eslint --fix .",
+    "lint": "prettier --check . && eslint .",
+{%- endif %}
     "prepare": "svelte-kit sync || echo ''",
     "preview": "vite preview"
   },
   "devDependencies": {
 {%- set deps = {
-  "@biomejs/biome": "2.5.13",
-  "@sveltejs/kit": "^2.63.0",
+  "@sveltejs/kit": "^3.0.1",
   "@sveltejs/vite-plugin-svelte": "^7.1.2",
   "@tailwindcss/vite": "^4.3.0",
   "@types/bun": "^1.3.0",
-  "svelte": "^5.56.1",
-  "svelte-check": "^4.6.0",
+  "svelte": "^5.57.1",
+  "svelte-check": "^4.7.6",
   "tailwindcss": "^4.3.0",
   "typescript": "^6.0.3",
-  "ultracite": "7.12.0",
   "vite": "^8.0.16",
 } -%}
-{%- if frontend_adapter == 'bun' %}{% set _ = deps.update({"svelte-adapter-bun": "^1.0.1"}) %}{% else %}{% set _ = deps.update({"@sveltejs/adapter-static": "^3.0.10"}) %}{% endif -%}
+{%- if linter == 'biome' %}{% set _ = deps.update({
+  "@biomejs/biome": "^2.5.15",
+  "ultracite": "^7.12.4",
+}) %}{% else %}{% set _ = deps.update({
+  "@eslint/compat": "^2.1.1",
+  "@eslint/js": "^10.0.1",
+  "eslint": "^10.12.0",
+  "eslint-config-prettier": "^10.1.8",
+  "eslint-plugin-svelte": "^3.23.0",
+  "globals": "^17.13.0",
+  "prettier": "^3.9.9",
+  "prettier-plugin-svelte": "^4.1.1",
+  "prettier-plugin-tailwindcss": "^0.8.1",
+  "typescript-eslint": "^8.71.1",
+}) %}{% endif -%}
+{%- if frontend_adapter == 'bun' %}{% set _ = deps.update({"@sveltejs/adapter-bun": "^1.0.0"}) %}{% else %}{% set _ = deps.update({"@sveltejs/adapter-static": "^4.0.0"}) %}{% endif -%}
 {%- if ui_library == 'shadcn' %}{% set _ = deps.update({
   "@internationalized/date": "^3.12.0",
   "@lucide/svelte": "^1.23.0",

template/{{ part_dir }}/src/env.ts

@@ -0,0 +1,5 @@
+import { defineEnvVars } from "@sveltejs/kit/env";
+
+export const variables = defineEnvVars({
+  PUBLIC_API_BASE_URL: { public: true, schema: (input) => input ?? "/api" },
+});

template/{{ part_dir }}/src/lib/api/client.ts

@@ -1,6 +1,6 @@
-import { env } from "$env/dynamic/public";
+import { PUBLIC_API_BASE_URL } from "$app/env/public";
 
-const BASE = env.PUBLIC_API_BASE_URL ?? "/api";
+const BASE = PUBLIC_API_BASE_URL;
 
 export class ApiError extends Error {
   status: number;

template/{{ part_dir }}/src/lib/index.ts

@@ -1,2 +0,0 @@
-// place files you want to import through the `$lib` alias in this folder.
-// biome-ignore-all lint/suspicious/noEmptySource: temporary

template/{{ part_dir }}/src/lib/index.ts.jinja

@@ -0,0 +1,3 @@
+// place files you want to import through the `#lib` alias in this folder.
+{% if linter == 'biome' %}// biome-ignore-all lint/suspicious/noEmptySource: temporary
+{% endif %}

template/{{ part_dir }}/svelte.config.js.jinja

@@ -1,36 +0,0 @@
-{% if frontend_adapter == 'bun' -%}
-import adapter from "svelte-adapter-bun";
-
-/** @type {import('@sveltejs/kit').Config} */
-const config = {
-  compilerOptions: {
-    runes: ({ filename }) =>
-      // biome-ignore lint/performance/useTopLevelRegex: svelte default behaviour
-      filename.split(/[/\\]/).includes("node_modules") ? undefined : true,
-  },
-  kit: {
-    adapter: adapter(),
-  },
-};
-
-export default config;
-{%- else -%}
-import adapter from "@sveltejs/adapter-static";
-import { vitePreprocess } from "@sveltejs/vite-plugin-svelte";
-
-/** @type {import('@sveltejs/kit').Config} */
-const config = {
-  kit: {
-    adapter: adapter({
-      assets: "build",
-      fallback: "index.html",
-      pages: "build",
-      precompress: false,
-      strict: false,
-    }),
-  },
-  preprocess: vitePreprocess(),
-};
-
-export default config;
-{%- endif %}

template/{{ part_dir }}/tsconfig.json.jinja

@@ -1,20 +1,9 @@
 {
-  "extends": "./.svelte-kit/tsconfig.json",
+  "extends": "$app/tsconfig",
   "compilerOptions": {
     "rewriteRelativeImportExtensions": true,
-    "allowJs": true,
-    "checkJs": true,
-    "esModuleInterop": true,
-    "forceConsistentCasingInFileNames": true,
-    "resolveJsonModule": true,
-    "skipLibCheck": true,
     "sourceMap": true,
-    "strict": true,
-    "moduleResolution": "bundler"
-  }
-  // Path aliases are handled by https://svelte.dev/docs/kit/configuration#alias
-  // except $lib which is handled by https://svelte.dev/docs/kit/configuration#files
-  //
-  // To make changes to top-level options such as include and exclude, we recommend extending
-  // the generated config; see https://svelte.dev/docs/kit/configuration#typescript
+    "strict": true
+  },
+  "include": ["src", "vite.config.ts"]
 }

template/{{ part_dir }}/vite.config.ts

@@ -1,20 +0,0 @@
-import { sveltekit } from "@sveltejs/kit/vite";
-import tailwindcss from "@tailwindcss/vite";
-import { defineConfig } from "vite";
-
-const allowedHosts = process.env.ALLOWED_HOSTS
-  ? process.env.ALLOWED_HOSTS.split(",")
-  : undefined;
-
-export default defineConfig({
-  plugins: [tailwindcss(), sveltekit()],
-  server: {
-    allowedHosts,
-    proxy: {
-      "/api": {
-        changeOrigin: true,
-        target: process.env.API_PROXY_TARGET ?? "http://localhost:8080",
-      },
-    },
-  },
-});

template/{{ part_dir }}/vite.config.ts.jinja

@@ -0,0 +1,51 @@
+{% if frontend_adapter == 'bun' -%}
+import adapter from "@sveltejs/adapter-bun";
+import { sveltekit } from "@sveltejs/kit/vite";
+import tailwindcss from "@tailwindcss/vite";
+import { defineConfig } from "vite";
+
+const PATH_SEP = /[/\\]/;
+{%- else -%}
+import adapter from "@sveltejs/adapter-static";
+import { sveltekit } from "@sveltejs/kit/vite";
+import { vitePreprocess } from "@sveltejs/vite-plugin-svelte";
+import tailwindcss from "@tailwindcss/vite";
+import { defineConfig } from "vite";
+{%- endif %}
+
+const allowedHosts = process.env.ALLOWED_HOSTS
+  ? process.env.ALLOWED_HOSTS.split(",")
+  : undefined;
+
+export default defineConfig({
+  plugins: [
+    tailwindcss(),
+    sveltekit({
+{%- if frontend_adapter == 'bun' %}
+      adapter: adapter(),
+      compilerOptions: {
+        runes: ({ filename }) =>
+          filename.split(PATH_SEP).includes("node_modules") ? undefined : true,
+      },
+{%- else %}
+      adapter: adapter({
+        assets: "build",
+        fallback: "index.html",
+        pages: "build",
+        precompress: false,
+        strict: false,
+      }),
+      preprocess: [vitePreprocess()],
+{%- endif %}
+    }),
+  ],
+  server: {
+    allowedHosts,
+    proxy: {
+      "/api": {
+        changeOrigin: true,
+        target: process.env.API_PROXY_TARGET ?? "http://localhost:8080",
+      },
+    },
+  },
+});

template/{{ part_dir }}/{% if layout == 'root' %}README.md{% endif %}.jinja

@@ -1,14 +1,8 @@
 # {{ project_name }}
 
-Runs in Docker, locally the same way as in production. `COMPOSE_PROFILES` in `.env` selects the services that run on this machine. `docker-compose.override.yml` holds what differs between machines: published ports and the aliases on the external `caddy` network.
-
 ```sh
-make env
-make recreate
+make env       # .env and docker-compose.override.yml from the examples
+make recreate  # the services in COMPOSE_PROFILES
+make dev       # vite on the host
+make check
 ```
-
-`make env` creates `.env` and `docker-compose.override.yml` from their examples. `make recreate` starts the selected profiles, `make rebuild` builds the image first, `make logs`, `make restart` and `make down` do what they say.
-
-To deploy, `git pull && make deploy`. It runs `make pre-deploy`, which rebuilds the image only when something in the repository changed, then `docker compose up -d`. A deploy system with its own `up` step calls `make pre-deploy` before it and `make post-deploy` after. What was built is remembered as `refs/deploy/*` in the clone.
-
-`make dev` runs the Vite dev server on the host, `make fmt` formats, `make check` runs svelte-check and the linter.

template/{{ part_dir }}/{% if linter == 'biome' %}biome.jsonc{% endif %}.jinja

@@ -21,6 +21,7 @@
       "includes": ["**/*.svelte"],
       "linter": {
         "rules": {
+          "a11y": { "useAnchorContent": "off" },
           "style": {
             "useFilenamingConvention": {
               "level": "error",

template/{{ part_dir }}/{% if linter == 'eslint' %}.prettierignore{% endif %}

@@ -0,0 +1,14 @@
+# Package managers
+package-lock.json
+pnpm-lock.yaml
+yarn.lock
+bun.lock
+bun.lockb
+
+# Written by copier and the infra template, not by hand
+.copier/
+*.md
+renovate.jsonc
+
+# Miscellaneous
+/static/

template/{{ part_dir }}/{% if linter == 'eslint' %}.prettierrc{% endif %}

@@ -0,0 +1,6 @@
+{
+  "trailingComma": "es5",
+  "plugins": ["prettier-plugin-svelte", "prettier-plugin-tailwindcss"],
+  "overrides": [{ "files": "*.svelte", "options": { "parser": "svelte" } }],
+  "tailwindStylesheet": "./src/routes/layout.css"
+}

template/{{ part_dir }}/{% if linter == 'eslint' %}eslint.config.js{% endif %}.jinja

@@ -0,0 +1,59 @@
+import { fileURLToPath } from "node:url";
+import { includeIgnoreFile } from "@eslint/compat";
+import js from "@eslint/js";
+import prettier from "eslint-config-prettier";
+import svelte from "eslint-plugin-svelte";
+import { defineConfig } from "eslint/config";
+import globals from "globals";
+import ts from "typescript-eslint";
+
+const gitignorePath = fileURLToPath(new URL("./.gitignore", import.meta.url));
+
+{% if frontend_adapter == 'bun' -%}
+const svelteConfig = {
+  compilerOptions: {
+    runes: ({ filename }) =>
+      filename.split(/[/\\]/).includes("node_modules") ? undefined : true,
+  },
+};
+{%- else -%}
+const svelteConfig = {};
+{%- endif %}
+
+export default defineConfig(
+  includeIgnoreFile(gitignorePath),
+  js.configs.recommended,
+  ...ts.configs.recommended,
+  ...svelte.configs.recommended,
+  prettier,
+  ...svelte.configs.prettier,
+  {
+    languageOptions: { globals: { ...globals.browser, ...globals.node } },
+    rules: {
+      // typescript-eslint recommends against no-undef on TypeScript projects:
+      // https://typescript-eslint.io/troubleshooting/faqs/eslint/#i-get-errors-from-the-no-undef-rule-about-global-variables-not-being-defined-even-though-there-are-no-typescript-errors
+      "no-undef": "off",
+    },
+  },
+{%- if ui_library == 'shadcn' %}
+  {
+    // shadcn-svelte primitives are copied in and changed upstream only.
+    files: ["src/lib/components/ui/**"],
+    rules: {
+      "@typescript-eslint/no-explicit-any": "off",
+      "svelte/no-navigation-without-resolve": "off",
+    },
+  },
+{%- endif %}
+  {
+    files: ["**/*.svelte", "**/*.svelte.ts", "**/*.svelte.js"],
+    languageOptions: {
+      parserOptions: {
+        extraFileExtensions: [".svelte"],
+        parser: ts.parser,
+        projectService: true,
+        svelteConfig,
+      },
+    },
+  }
+);

template/{{ part_dir }}/{% if serve != 'api' %}Dockerfile{% endif %}.jinja

@@ -1,24 +1,48 @@
 {% if frontend_adapter == 'bun' -%}
-FROM oven/bun:alpine
+FROM oven/bun:1-alpine AS deps
 
 ENV TERM=xterm-256color
 ENV COLORTERM=truecolor
+ENV BUN_INSTALL_CACHE_DIR=/bun-cache
 
 WORKDIR /app
 
 COPY package.json bun.lock* ./
 
-RUN bun install --frozen-lockfile
+RUN --mount=type=cache,target=/bun-cache bun install --frozen-lockfile
+
+
+# .env is in the context ($env/static/* are inlined at build) and stays in
+# this stage: the runtime image below gets build/ and production deps only.
+FROM deps AS builder
 
 COPY . .
 
 RUN bun --bun svelte-kit sync
 RUN bun --bun run build
 
+
+FROM oven/bun:1-alpine AS runtime
+
+ENV NODE_ENV=production
+# The cache mount only holds files; without the variable bun caches into
+# ~/.bun inside the image.
+ENV BUN_INSTALL_CACHE_DIR=/bun-cache
+
+WORKDIR /app
+
+COPY package.json bun.lock* ./
+
+RUN --mount=type=cache,target=/bun-cache bun install --frozen-lockfile --production
+
+COPY --from=builder /app/build ./build
+
+EXPOSE 3000
+
 ENTRYPOINT ["bun"]
 CMD ["build/index.js"]
 {%- else -%}
-FROM oven/bun:alpine AS deps
+FROM oven/bun:1-alpine AS deps
 
 ENV TERM=xterm-256color
 ENV COLORTERM=truecolor
@@ -39,7 +63,7 @@ RUN bun --bun svelte-kit sync
 RUN bun run build
 
 
-FROM oven/bun:alpine AS runtime
+FROM oven/bun:1-alpine AS runtime
 
 ENV NODE_ENV=production