feat(build): add lightweight libreoffice build extension

.changeset/libreoffice-build-extension.md

@@ -0,0 +1,5 @@
+---
+"@trigger.dev/build": patch
+---
+
+feat(build): add libreoffice build extension for headless docx/pptx to PDF conversion

docs/guides/examples/libreoffice-pdf-conversion.mdx

@@ -12,27 +12,36 @@ import LocalDevelopment from "/snippets/local-development-extensions.mdx";
 - [LibreOffice](https://www.libreoffice.org/download/libreoffice-fresh/) installed on your machine
 - A [Cloudflare R2](https://developers.cloudflare.com) account and bucket
 
-### Using our `aptGet` build extension to add the LibreOffice package
+### Using the `libreoffice` build extension
 
-To deploy this task, you'll need to add LibreOffice to your project configuration, like this:
+To deploy this task, add the dedicated `libreoffice` build extension to your project configuration. It installs LibreOffice in headless mode (no X11 required) along with the fonts needed for accurate document rendering:
 
 ```ts trigger.config.ts
-import { aptGet } from "@trigger.dev/build/extensions/core";
+import { libreoffice } from "@trigger.dev/build/extensions/libreoffice";
 import { defineConfig } from "@trigger.dev/sdk";
 
 export default defineConfig({
   project: "<project ref>",
   // Your other config settings...
   build: {
     extensions: [
-      aptGet({
-        packages: ["libreoffice"],
-      }),
+      libreoffice(),
     ],
   },
 });
 ```
 
+By default this installs `libreoffice-writer` (for `.docx`) and `libreoffice-impress` (for `.pptx`) together with `fonts-liberation` and `fonts-dejavu-core`. You can customise which components are installed:
+
+```ts trigger.config.ts
+libreoffice({
+  // Only install the writer component (smaller image)
+  components: ["writer"],
+  // Add extra font packages if needed
+  extraFonts: ["fonts-noto"],
+})
+```
+
 <Note>
   [Build extensions](/config/extensions/overview) allow you to hook into the build system and
   customize the build process or the resulting bundle and container image (in the case of

packages/build/package.json

@@ -31,7 +31,8 @@
       "./extensions/typescript": "./src/extensions/typescript.ts",
       "./extensions/puppeteer": "./src/extensions/puppeteer.ts",
       "./extensions/playwright": "./src/extensions/playwright.ts",
-      "./extensions/lightpanda": "./src/extensions/lightpanda.ts"
+      "./extensions/lightpanda": "./src/extensions/lightpanda.ts",
+      "./extensions/libreoffice": "./src/extensions/libreoffice.ts"
     },
     "sourceDialects": [
       "@triggerdotdev/source"
@@ -65,6 +66,9 @@
       ],
       "extensions/lightpanda": [
         "dist/commonjs/extensions/lightpanda.d.ts"
+      ],
+      "extensions/libreoffice": [
+        "dist/commonjs/extensions/libreoffice.d.ts"
       ]
     }
   },
@@ -207,6 +211,17 @@
         "types": "./dist/commonjs/extensions/lightpanda.d.ts",
         "default": "./dist/commonjs/extensions/lightpanda.js"
       }
+    },
+    "./extensions/libreoffice": {
+      "import": {
+        "@triggerdotdev/source": "./src/extensions/libreoffice.ts",
+        "types": "./dist/esm/extensions/libreoffice.d.ts",
+        "default": "./dist/esm/extensions/libreoffice.js"
+      },
+      "require": {
+        "types": "./dist/commonjs/extensions/libreoffice.d.ts",
+        "default": "./dist/commonjs/extensions/libreoffice.js"
+      }
     }
   },
   "main": "./dist/commonjs/index.js",

packages/build/src/extensions/libreoffice.ts

@@ -0,0 +1,66 @@
+import { BuildManifest } from "@trigger.dev/core/v3";
+import { BuildContext, BuildExtension } from "@trigger.dev/core/v3/build";
+
+export type LibreOfficeOptions = {
+  /**
+   * Which LibreOffice component packages to install.
+   * Defaults to ["writer", "impress"] for docx and pptx support.
+   * - "writer"  → libreoffice-writer  (handles .doc/.docx)
+   * - "impress" → libreoffice-impress (handles .ppt/.pptx)
+   * - "calc"    → libreoffice-calc    (handles .xls/.xlsx)
+   * - "draw"    → libreoffice-draw    (handles .odg)
+   * - "math"    → libreoffice-math    (formula editor)
+   */
+  components?: Array<"writer" | "impress" | "calc" | "draw" | "math">;
+  /**
+   * Additional font packages to install beyond the built-in defaults.
+   * Built-in defaults: fonts-liberation, fonts-dejavu-core.
+   * Example: ["fonts-noto", "fonts-freefont-ttf"]
+   */
+  extraFonts?: string[];
+};
+
+export function libreoffice(options: LibreOfficeOptions = {}): BuildExtension {
+  return new LibreOfficeExtension(options);
+}
+
+class LibreOfficeExtension implements BuildExtension {
+  public readonly name = "LibreOfficeExtension";
+
+  constructor(private readonly options: LibreOfficeOptions = {}) {}
+
+  async onBuildComplete(context: BuildContext, manifest: BuildManifest) {
+    if (context.target === "dev") {
+      return;
+    }
+
+    const components = this.options.components ?? ["writer", "impress"];
+    const componentPkgs = components.map((c) => `libreoffice-${c}`);
+
+    // fonts-liberation: free equivalents of Times New Roman, Arial, Courier New –
+    // essential for accurate rendering of most Office documents.
+    // fonts-dejavu-core: broad Unicode coverage for international content.
+    const fontPkgs = ["fonts-liberation", "fonts-dejavu-core", ...(this.options.extraFonts ?? [])];
+
+    const allPkgs = [...componentPkgs, ...fontPkgs].join(" \\\n    ");
+
+    context.logger.debug(`Adding ${this.name} to the build`, { components });
+
+    context.addLayer({
+      id: "libreoffice",
+      image: {
+        // Use --no-install-recommends to avoid pulling in X11 desktop packages.
+        // LibreOffice's --headless flag handles PDF conversion without a display.
+        instructions: [
+          `RUN apt-get update && apt-get install -y --no-install-recommends \\\n    ${allPkgs} \\\n    && rm -rf /var/lib/apt/lists/*`,
+        ],
+      },
+      deploy: {
+        env: {
+          LIBREOFFICE_PATH: "/usr/bin/libreoffice",
+        },
+        override: true,
+      },
+    });
+  }
+}

references/libreoffice/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "references-libreoffice",
+  "private": true,
+  "type": "module",
+  "devDependencies": {
+    "trigger.dev": "workspace:*"
+  },
+  "dependencies": {
+    "@trigger.dev/build": "workspace:*",
+    "@trigger.dev/sdk": "workspace:*"
+  },
+  "scripts": {
+    "dev": "trigger dev",
+    "deploy": "trigger deploy"
+  }
+}

references/libreoffice/src/trigger/libreoffice-convert.ts

@@ -0,0 +1,81 @@
+import { task } from "@trigger.dev/sdk";
+import { execFile } from "node:child_process";
+import { mkdirSync, readFileSync, unlinkSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { promisify } from "node:util";
+
+const execFileAsync = promisify(execFile);
+
+/**
+ * Convert a .docx or .pptx file (supplied as a URL) to PDF using LibreOffice
+ * running in headless mode — no X11 display required.
+ *
+ * Requires the `libreoffice()` build extension in trigger.config.ts so that
+ * LibreOffice is available inside the deployed container.
+ */
+export const libreofficeConvert = task({
+  id: "libreoffice-convert",
+  run: async (payload: {
+    /** Public URL of the .docx or .pptx file to convert. */
+    documentUrl: string;
+    /** Optional output filename (without extension). Defaults to "output". */
+    outputName?: string;
+  }) => {
+    const { documentUrl, outputName = "output" } = payload;
+
+    // Use a unique temp directory so concurrent runs don't collide.
+    const workDir = join(tmpdir(), `lo-${Date.now()}`);
+    mkdirSync(workDir, { recursive: true });
+
+    // Derive a safe input filename from the URL.
+    const urlPath = new URL(documentUrl).pathname;
+    const ext = urlPath.split(".").pop() ?? "docx";
+    const inputPath = join(workDir, `input.${ext}`);
+    // LibreOffice names the output after the input file stem.
+    const outputPath = join(workDir, `input.pdf`);
+
+    try {
+      // 1. Download the source document.
+      const response = await fetch(documentUrl);
+      if (!response.ok) {
+        throw new Error(`Failed to fetch document: ${response.status} ${response.statusText}`);
+      }
+      const arrayBuffer = await response.arrayBuffer();
+      writeFileSync(inputPath, Buffer.from(arrayBuffer));
+
+      // 2. Convert to PDF using LibreOffice headless.
+      //    --norestore prevents LibreOffice from showing a recovery dialog.
+      //    --outdir directs the output file to our working directory.
+      const libreofficeBin = process.env.LIBREOFFICE_PATH ?? "libreoffice";
+      await execFileAsync(libreofficeBin, [
+        "--headless",
+        "--norestore",
+        "--convert-to",
+        "pdf",
+        "--outdir",
+        workDir,
+        inputPath,
+      ]);
+
+      // 3. Read the resulting PDF.
+      const pdfBuffer = readFileSync(outputPath);
+
+      return {
+        outputName: `${outputName}.pdf`,
+        sizeBytes: pdfBuffer.byteLength,
+        // Return base64 so the result is JSON-serialisable.
+        // In production you would upload pdfBuffer to S3 / R2 instead.
+        base64: pdfBuffer.toString("base64"),
+      };
+    } finally {
+      // Clean up temp files.
+      try {
+        unlinkSync(inputPath);
+      } catch {}
+      try {
+        unlinkSync(outputPath);
+      } catch {}
+    }
+  },
+});

references/libreoffice/trigger.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from "@trigger.dev/sdk/v3";
+import { libreoffice } from "@trigger.dev/build/extensions/libreoffice";
+
+export default defineConfig({
+  project: "proj_libreoffice_example",
+  build: {
+    extensions: [
+      // Installs libreoffice-writer and libreoffice-impress (headless, no X11)
+      // along with fonts-liberation and fonts-dejavu-core for accurate rendering.
+      libreoffice(),
+    ],
+  },
+});

references/libreoffice/tsconfig.json

@@ -0,0 +1,14 @@
+{
+  "compilerOptions": {
+    "target": "ES2023",
+    "module": "Node16",
+    "moduleResolution": "Node16",
+    "esModuleInterop": true,
+    "strict": true,
+    "skipLibCheck": true,
+    "customConditions": ["@triggerdotdev/source"],
+    "lib": ["DOM", "DOM.Iterable"],
+    "noEmit": true
+  },
+  "include": ["./src/**/*.ts", "trigger.config.ts"]
+}