fix(og): read OG fonts from the repo instead of fetching Google Fonts at build

apps/sim/app/(landing)/og-utils.test.tsx

@@ -0,0 +1,28 @@
+/**
+ * @vitest-environment node
+ */
+import { describe, expect, it } from 'vitest'
+import { createLandingOgImage } from '@/app/(landing)/og-utils'
+
+/**
+ * Renders a real PNG. The bundled fonts are the point: Satori throws
+ * "No fonts are loaded" if it receives an empty `fonts` array, which is how a
+ * failed Google Fonts fetch used to take the whole build down.
+ */
+describe('landing OG image', () => {
+  it('renders a PNG using the bundled Geist fonts', async () => {
+    const response = await createLandingOgImage({
+      eyebrow: 'Sim integration',
+      title: 'Mintlify Integration',
+      subtitle: 'Deploy, edit, search, and measure Mintlify documentation',
+      pills: ['12 tools', 'API key auth', 'Free to start'],
+      domainLabel: 'sim.ai/integrations/mintlify',
+    })
+
+    expect(response.status).toBe(200)
+    const bytes = new Uint8Array(await response.arrayBuffer())
+    expect(bytes.byteLength).toBeGreaterThan(1000)
+    // PNG magic number — proves Satori laid the text out and resvg rasterized it.
+    expect(Array.from(bytes.slice(0, 8))).toEqual([137, 80, 78, 71, 13, 10, 26, 10])
+  }, 30_000)
+})

apps/sim/app/(landing)/og-utils.tsx

@@ -1,3 +1,5 @@
+import { readFile } from 'node:fs/promises'
+import { join } from 'node:path'
 import { ImageResponse } from 'next/og'
 import { SimLogoFull } from '@/app/(landing)/components/og-sim-logo'
 
@@ -18,28 +20,37 @@ function getTitleFontSize(title: string): number {
   return TITLE_FONT_SIZE.large
 }
 
-async function loadGoogleFont(
-  font: string,
-  weights: string,
-  text: string
-): Promise<ArrayBuffer | null> {
-  try {
-    const url = `https://fonts.googleapis.com/css2?family=${font}:wght@${weights}&text=${encodeURIComponent(text)}`
-    const css = await (await fetch(url)).text()
-    const resource = css.match(/src: url\(([^)]+)\) format\('(opentype|truetype|woff2?)'\)/)
+/**
+ * Geist, read from the repo rather than fetched from Google Fonts.
+ *
+ * Satori requires at least one font and throws if it gets none, so a fetch that
+ * returned nothing took the whole build down with "No fonts are loaded" on
+ * whichever page happened to be rendering. That was not a rare race: six routes
+ * build an OG image, `integrations/[slug]` alone is 237 pages, and each render
+ * fetched two weights subsetted by `&text=` — a per-page URL no cache can reuse.
+ * Several hundred uncacheable requests to one host, from one CI egress IP, in
+ * parallel across build workers.
+ *
+ * Read once at module scope, per Next's `ImageResponse` guidance. `.ttf`
+ * because Satori accepts only ttf/otf/woff — the sibling `.woff2` the app
+ * serves to browsers cannot be reused here.
+ *
+ * These live under `public/` so they need no `outputFileTracingIncludes` entry:
+ * `docker/app.Dockerfile` copies that directory into the runner, which the
+ * `force-dynamic` share-token card needs since it renders per request.
+ *
+ * `process.cwd()` is the app directory in every environment this runs in, not
+ * just dev and build. The container starts at the monorepo root, but Next's
+ * generated standalone `server.js` opens with `process.chdir(__dirname)`, and
+ * that file ships beside `public/` — which is also why `content/` is read this
+ * way at runtime.
+ */
+const FONT_DIR = join(process.cwd(), 'public', 'brand', 'fonts')
 
-    if (resource) {
-      const response = await fetch(resource[1])
-      if (response.status === 200) {
-        return await response.arrayBuffer()
-      }
-    }
-  } catch {
-    return null
-  }
-
-  return null
-}
+const [geistRegular, geistMedium] = await Promise.all([
+  readFile(join(FONT_DIR, 'Geist-Regular.ttf')),
+  readFile(join(FONT_DIR, 'Geist-Medium.ttf')),
+])
 
 interface LandingOgImageProps {
   eyebrow: string
@@ -57,12 +68,6 @@ export async function createLandingOgImage({
   pills = [],
   domainLabel = 'sim.ai',
 }: LandingOgImageProps) {
-  const text = `${eyebrow}${title}${subtitle}${pills.join('')}${domainLabel}`
-  const [regularFontData, mediumFontData] = await Promise.all([
-    loadGoogleFont('Geist', '400', text),
-    loadGoogleFont('Geist', '500', text),
-  ])
-
   return new ImageResponse(
     <div
       style={{
@@ -160,26 +165,8 @@ export async function createLandingOgImage({
     {
       ...size,
       fonts: [
-        ...(regularFontData
-          ? [
-              {
-                name: 'Geist',
-                data: regularFontData,
-                style: 'normal' as const,
-                weight: 400 as const,
-              },
-            ]
-          : []),
-        ...(mediumFontData
-          ? [
-              {
-                name: 'Geist',
-                data: mediumFontData,
-                style: 'normal' as const,
-                weight: 500 as const,
-              },
-            ]
-          : []),
+        { name: 'Geist', data: geistRegular, style: 'normal' as const, weight: 400 as const },
+        { name: 'Geist', data: geistMedium, style: 'normal' as const, weight: 500 as const },
       ],
     }
   )

apps/sim/public/brand/fonts/Geist-OFL.txt

@@ -0,0 +1,93 @@
+Copyright 2024 The Geist Project Authors (https://github.com/vercel/geist-font)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+https://openfontlicense.org
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.