Allow custom LibreOffice binary path via environment variable

.gitignore

@@ -1,7 +1,7 @@
 .vscode/
 .serverless/
 coverage/
-lib/
+# lib/
 node_modules/
 
 *.log

lib/cleanup.d.ts

@@ -0,0 +1 @@
+export declare function cleanupTempFiles(): Promise<void>;

lib/cleanup.js

@@ -0,0 +1,23 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.cleanupTempFiles = cleanupTempFiles;
+var _promises = _interopRequireDefault(require("fs/promises"));
+var _del = _interopRequireDefault(require("del"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+// Removes temp files generated by LibreOffice
+async function cleanupTempFiles() {
+  const files = await _promises.default.readdir(`/tmp`);
+  for (const file of files) {
+    if (file.endsWith('.tmp') === true || file.startsWith('OSL_PIPE')) {
+      try {
+        await (0, _del.default)([`/tmp/${file}`, `/tmp/${file}/*`], {
+          force: true
+        });
+        // eslint-disable-next-line no-empty
+      } catch (error) {}
+    }
+  }
+}

lib/convert.d.ts

@@ -0,0 +1,2 @@
+export declare const DEFAULT_ARGS: string[];
+export declare function convertTo(filename: string, format: string): Promise<string>;

lib/convert.js

@@ -0,0 +1,33 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.DEFAULT_ARGS = void 0;
+exports.convertTo = convertTo;
+var _child_process = _interopRequireDefault(require("child_process"));
+var _util = _interopRequireDefault(require("util"));
+var _cleanup = require("./cleanup");
+var _logs = require("./logs");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+const exec = _util.default.promisify(_child_process.default.exec);
+const DEFAULT_ARGS = ['--headless', '--invisible', '--nodefault', '--view', '--nolockcheck', '--nologo', '--norestore'];
+exports.DEFAULT_ARGS = DEFAULT_ARGS;
+const LO_BINARY_PATH = process.env.LO_BINARY_PATH ?? 'libreoffice7.6';
+async function convertTo(filename, format) {
+  await (0, _cleanup.cleanupTempFiles)();
+  const argumentsString = DEFAULT_ARGS.join(' ');
+  const outputFilename = filename.split(/\\ /).join(' ');
+  const cmd = `cd /tmp && ${LO_BINARY_PATH} ${argumentsString} --convert-to ${format} --outdir /tmp '/tmp/${outputFilename}'`;
+  let logs;
+
+  // due to an unknown issue, we need to run command twice
+  try {
+    logs = (await exec(cmd)).stdout;
+  } catch (e) {
+    logs = (await exec(cmd)).stdout;
+  }
+  await exec(`rm '/tmp/${outputFilename}'`);
+  await (0, _cleanup.cleanupTempFiles)();
+  return (0, _logs.getConvertedFilePath)(logs.toString());
+}

lib/index.d.ts

@@ -0,0 +1,2 @@
+export * from './convert';
+export * from './validations';

lib/index.js

@@ -0,0 +1,27 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+var _convert = require("./convert");
+Object.keys(_convert).forEach(function (key) {
+  if (key === "default" || key === "__esModule") return;
+  if (key in exports && exports[key] === _convert[key]) return;
+  Object.defineProperty(exports, key, {
+    enumerable: true,
+    get: function () {
+      return _convert[key];
+    }
+  });
+});
+var _validations = require("./validations");
+Object.keys(_validations).forEach(function (key) {
+  if (key === "default" || key === "__esModule") return;
+  if (key in exports && exports[key] === _validations[key]) return;
+  Object.defineProperty(exports, key, {
+    enumerable: true,
+    get: function () {
+      return _validations[key];
+    }
+  });
+});

lib/logs.d.ts

@@ -0,0 +1 @@
+export declare function getConvertedFilePath(logs: string): string;

lib/logs.js

@@ -0,0 +1,15 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.getConvertedFilePath = getConvertedFilePath;
+function getConvertedFilePath(logs) {
+  try {
+    return logs.match(/\/tmp\/.+->\s(\/tmp\/.+) using/)[1];
+  } catch (e) {
+    const ErrorWithExtendedMessage = new Error(e);
+    ErrorWithExtendedMessage.message += `;\tTried to parse string: "${logs}"`;
+    throw ErrorWithExtendedMessage;
+  }
+}

lib/validations.d.ts

@@ -0,0 +1 @@
+export declare function canBeConvertedToPDF(filename: string): boolean;

lib/validations.js

@@ -0,0 +1,19 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.canBeConvertedToPDF = canBeConvertedToPDF;
+var _isVideo = _interopRequireDefault(require("is-video"));
+var _isImage = _interopRequireDefault(require("is-image"));
+var _isAudioFilepath = _interopRequireDefault(require("@shelf/is-audio-filepath"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+const UNSUPPORTED_FILE_EXTENSIONS = ['.chm', '.heic', '.gdoc', '.gsheet', '.gslides', '.zip', '.dwg'];
+function canBeConvertedToPDF(filename) {
+  filename = filename.toLowerCase();
+  const isFileExtensionUnsupported = UNSUPPORTED_FILE_EXTENSIONS.some(ext => filename.endsWith(ext));
+  if (isFileExtensionUnsupported) {
+    return false;
+  }
+  return !(0, _isImage.default)(filename) && !(0, _isVideo.default)(filename) && !(0, _isAudioFilepath.default)(filename);
+}

src/convert.ts

@@ -14,7 +14,7 @@ export const DEFAULT_ARGS = [
   '--nologo',
   '--norestore',
 ];
-const LO_BINARY_PATH = 'libreoffice7.6';
+const LO_BINARY_PATH = process.env.LO_BINARY_PATH ?? 'libreoffice7.6';
 
 export async function convertTo(filename: string, format: string): Promise<string> {
   await cleanupTempFiles();