release: WRNexusJS 0.4.0

packages/styles/src/audit.ts

@@ -0,0 +1,80 @@
+export interface CssTokenAudit {
+  declared: string[];
+  used: string[];
+  missing: string[];
+  unused: string[];
+}
+
+/** Audit framework design-token declarations and var() references. */
+export function auditWireTokens(css: string): CssTokenAudit {
+  const declared = new Set<string>();
+  const used = new Set<string>();
+  for (const match of css.matchAll(/(--wire-[A-Za-z0-9_-]+)\s*:/g)) declared.add(match[1]!);
+  for (const match of css.matchAll(/var\(\s*(--wire-[A-Za-z0-9_-]+)/g)) used.add(match[1]!);
+  return {
+    declared: [...declared].sort(),
+    used: [...used].sort(),
+    missing: [...used].filter((token) => !declared.has(token)).sort(),
+    unused: [...declared].filter((token) => !used.has(token)).sort(),
+  };
+}
+
+export interface StyleSource {
+  path: string;
+  reason?: string;
+}
+
+/** Normalize/dedupe Tailwind scan sources without allowing line injection. */
+export function normalizeStyleSources(values: readonly (string | StyleSource)[]): StyleSource[] {
+  const result = new Map<string, StyleSource>();
+  for (const value of values) {
+    const source = typeof value === "string" ? { path: value } : value;
+    const path = source.path.trim();
+    if (!path || /[\r\n]/.test(path)) continue;
+    result.set(path, { path, reason: source.reason });
+  }
+  return [...result.values()];
+}
+
+export function tailwindSourceDirectives(values: readonly (string | StyleSource)[]): string {
+  return normalizeStyleSources(values)
+    .map(({ path }) => `@source ${JSON.stringify(path)};`)
+    .join("\n");
+}
+
+export interface ContrastResult {
+  ratio: number;
+  level: "fail" | "aa-large" | "aa" | "aaa";
+}
+
+function hexRgb(value: string): [number, number, number] | null {
+  const hex = value.trim().replace(/^#/, "");
+  const normalized = hex.length === 3 ? [...hex].map((part) => part + part).join("") : hex;
+  if (!/^[0-9a-f]{6}$/i.test(normalized)) return null;
+  return [0, 2, 4].map((offset) => Number.parseInt(normalized.slice(offset, offset + 2), 16)) as [
+    number,
+    number,
+    number,
+  ];
+}
+
+function luminance(value: string): number | null {
+  const rgb = hexRgb(value);
+  if (!rgb) return null;
+  const channels = rgb.map((channel) => {
+    const scaled = channel / 255;
+    return scaled <= 0.03928 ? scaled / 12.92 : ((scaled + 0.055) / 1.055) ** 2.4;
+  });
+  return 0.2126 * channels[0]! + 0.7152 * channels[1]! + 0.0722 * channels[2]!;
+}
+
+export function contrast(foreground: string, background: string): ContrastResult | null {
+  const left = luminance(foreground);
+  const right = luminance(background);
+  if (left === null || right === null) return null;
+  const ratio = (Math.max(left, right) + 0.05) / (Math.min(left, right) + 0.05);
+  return {
+    ratio: Math.round(ratio * 100) / 100,
+    level: ratio >= 7 ? "aaa" : ratio >= 4.5 ? "aa" : ratio >= 3 ? "aa-large" : "fail",
+  };
+}

packages/styles/src/config.ts

@@ -22,6 +22,12 @@ export type Mode = "development" | "production";
 export interface StyleProcessContext {
   /** Resolved absolute path to the CSS entry, or null if there is none. */
   entryPath: string | null;
+  /** Original application entry when a package-aware wrapper was generated. */
+  originalEntryPath?: string | null;
+  /** Package component/style directories that processors should scan. */
+  sources?: string[];
+  /** Package-owned CSS entries automatically imported into the application bundle. */
+  entries?: string[];
   appDir: string;
   appRoot: string;
   mode: Mode;
@@ -36,6 +42,10 @@ export interface StylesConfig {
    * used (which already resolves `@import`, including from node_modules).
    */
   process?: (ctx: StyleProcessContext) => string | Promise<string>;
+  /** Automatically append package scan sources to custom processor input. Default true. */
+  includePackageSources?: boolean;
+  /** Production defaults to throw; development defaults to best-effort fallback. */
+  failureMode?: "throw" | "fallback";
 }
 
 export interface MobileConfig {

packages/styles/src/index.ts

@@ -58,35 +58,40 @@ export {
 
 import type { Mode, StyleProcessContext, StylesConfig } from "./config.ts";
 import { bundleCss } from "./styles.ts";
+import { mkdir, writeFile } from "node:fs/promises";
+import { isAbsolute, join, relative } from "node:path";
 
 /**
  * Produce the final CSS for an entry: run the config's custom processor if one
  * is provided (Tailwind/PostCSS/Sass), otherwise use the built-in Bun bundler.
  *
- * If a custom processor throws (e.g. Tailwind can't resolve `tailwindcss`
- * because deps aren't installed), we DON'T crash every request — we log a clear,
- * actionable message and fall back to best-effort CSS so the app keeps serving.
+ * Development can fall back to best-effort CSS. Production throws by default so
+ * a deployment cannot silently ship unprocessed Tailwind/PostCSS directives.
  */
 export async function renderStyles(
   ctx: StyleProcessContext,
   styles?: StylesConfig,
 ): Promise<string> {
-  if (!ctx.entryPath) return "";
+  if (!ctx.entryPath && !ctx.entries?.length) return "";
+  const processContext =
+    styles?.includePackageSources === false ? ctx : await packageAwareStyleContext(ctx);
+  if (!processContext.entryPath) return "";
   if (styles?.process) {
     try {
-      return String(await styles.process(ctx));
+      return String(await styles.process(processContext));
     } catch (err) {
       const msg = err instanceof Error ? err.message : String(err);
-      console.error(
-        `\n[wrnexus] Stylesheet processing failed — serving un-processed CSS.\n` +
-          `  ${msg.split("\n")[0]}\n` +
-          `  If you use Tailwind, run \`bun install\` inside the app so \`tailwindcss\`\n` +
-          `  is available (an app created inside another project may not have it).\n`,
-      );
-      return await fallbackCss(ctx);
+      const details =
+        `[wrnexus] Stylesheet processing failed.\n` +
+        `  ${msg.split("\n")[0]}\n` +
+        "  If you use Tailwind, run `bun install` in the application workspace so the CLI and plugins are available.";
+      const failureMode = styles.failureMode ?? (ctx.mode === "production" ? "throw" : "fallback");
+      if (failureMode === "throw") throw new Error(details, { cause: err });
+      console.error(`\n${details}\n  Serving best-effort unprocessed CSS in development.\n`);
+      return await fallbackCss(processContext);
     }
   }
-  return bundleCss(ctx.entryPath, ctx.mode);
+  return bundleCss(processContext.entryPath!, processContext.mode);
 }
 
 /**
@@ -107,4 +112,44 @@ async function fallbackCss(ctx: StyleProcessContext): Promise<string> {
   }
 }
 
+async function packageAwareStyleContext(ctx: StyleProcessContext): Promise<StyleProcessContext> {
+  const sources = [...new Set((ctx.sources ?? []).filter(Boolean))];
+  const entries = [...new Set((ctx.entries ?? []).filter(Boolean))];
+  if (sources.length === 0 && entries.length === 0) return ctx;
+  if (!ctx.entryPath && entries.length === 0) return ctx;
+  const outputDir = join(ctx.appRoot, ".wrnexus", "styles");
+  const wrapper = join(outputDir, "global.with-package-sources.css");
+  await mkdir(outputDir, { recursive: true });
+  const localPath = (value: string): string => {
+    const path = isAbsolute(value) ? relative(outputDir, value) : value;
+    const normalized = path.replace(/\\/g, "/");
+    return normalized.startsWith(".") ? normalized : `./${normalized}`;
+  };
+  const quote = (value: string) => localPath(value).replace(/"/g, '\\"');
+  const imports = [...(ctx.entryPath ? [ctx.entryPath] : []), ...entries]
+    .map((value) => `@import "${quote(value)}";`)
+    .join("\n");
+  const directives = sources.map((value) => `@source "${quote(value)}";`).join("\n");
+  await writeFile(
+    wrapper,
+    `${imports}\n\n/* WRNexus package scan sources */\n${directives}\n`,
+    "utf8",
+  );
+  return {
+    ...ctx,
+    originalEntryPath: ctx.entryPath,
+    entryPath: wrapper,
+    sources,
+    entries,
+  };
+}
+
 export type { Mode as StylesMode };
+
+export {
+  auditWireTokens,
+  normalizeStyleSources,
+  tailwindSourceDirectives,
+  contrast,
+} from "./audit.ts";
+export type { CssTokenAudit, StyleSource, ContrastResult } from "./audit.ts";

packages/styles/src/styles.ts

@@ -62,6 +62,8 @@ export async function bundleCss(entryPath: string, mode: Mode): Promise<string>
   if (!result.success) {
     throw new Error("CSS bundle failed:\n" + result.logs.map(String).join("\n"));
   }
-  const cssOutput = result.outputs.find((o) => o.path.endsWith(".css")) ?? result.outputs[0];
-  return await cssOutput!.text();
+  const cssOutput =
+    result.outputs.find((output) => output.path?.endsWith(".css")) ?? result.outputs[0];
+  if (!cssOutput) throw new Error("CSS bundle produced no output.");
+  return await cssOutput.text();
 }