[Firefox] Generate a default-prefs file that can used directly in moz…

…illa-central (bug 1780609)

gulpfile.js

@@ -43,7 +43,6 @@ const through = require("through2");
 const BUILD_DIR = "build/";
 const L10N_DIR = "l10n/";
 const TEST_DIR = "test/";
-const EXTENSION_SRC_DIR = "extensions/";
 
 const BASELINE_DIR = BUILD_DIR + "baseline/";
 const MOZCENTRAL_BASELINE_DIR = BUILD_DIR + "mozcentral.baseline/";
@@ -1218,35 +1217,27 @@ gulp.task(
   )
 );
 
-function preprocessDefaultPreferences(content) {
-  const preprocessor2 = require("./external/builder/preprocessor2.js");
+function createDefaultPrefsFile() {
+  const fileName = "PdfJsViewerPrefs.js";
   const licenseHeader = fs.readFileSync("./src/license_header.js").toString();
 
-  const GLOBALS = "/* eslint-disable */\n";
   const MODIFICATION_WARNING =
     "//\n// THIS FILE IS GENERATED AUTOMATICALLY, DO NOT EDIT MANUALLY!\n//\n";
 
-  const bundleDefines = builder.merge(DEFINES, {
-    DEFAULT_PREFERENCES: getDefaultPreferences("mozcentral/"),
-  });
+  const prefs = getDefaultPreferences("mozcentral/");
+  const buf = [];
+  for (const name in prefs) {
+    let value = prefs[name];
 
-  content = preprocessor2.preprocessPDFJSCode(
-    {
-      rootPath: __dirname,
-      defines: bundleDefines,
-    },
-    content
-  );
+    if (typeof value === "string") {
+      value = `"${value}"`;
+    }
+    buf.push(`pref("pdfjs.${name}", ${value});`);
+  }
 
-  return (
-    licenseHeader +
-    "\n" +
-    GLOBALS +
-    "\n" +
-    MODIFICATION_WARNING +
-    "\n" +
-    content +
-    "\n"
+  return createStringSource(
+    fileName,
+    `${licenseHeader}\n${MODIFICATION_WARNING}\n${buf.join("\n")}\n`
   );
 }
 
@@ -1268,8 +1259,7 @@ gulp.task(
         MOZCENTRAL_CONTENT_DIR = MOZCENTRAL_EXTENSION_DIR + "content/",
         FIREFOX_EXTENSION_DIR = "extensions/firefox/",
         MOZCENTRAL_L10N_DIR =
-          MOZCENTRAL_DIR + "browser/locales/en-US/pdfviewer/",
-        FIREFOX_CONTENT_DIR = EXTENSION_SRC_DIR + "/firefox/content/";
+          MOZCENTRAL_DIR + "browser/locales/en-US/pdfviewer/";
 
       const MOZCENTRAL_WEB_FILES = [
         ...COMMON_WEB_FILES,
@@ -1331,10 +1321,7 @@ gulp.task(
           .pipe(replace(/\bPDFJSSCRIPT_COMMIT\b/g, commit))
           .pipe(gulp.dest(MOZCENTRAL_EXTENSION_DIR)),
         gulp.src("LICENSE").pipe(gulp.dest(MOZCENTRAL_EXTENSION_DIR)),
-        gulp
-          .src(FIREFOX_CONTENT_DIR + "PdfJsDefaultPreferences.jsm")
-          .pipe(transform("utf8", preprocessDefaultPreferences))
-          .pipe(gulp.dest(MOZCENTRAL_CONTENT_DIR)),
+        createDefaultPrefsFile().pipe(gulp.dest(MOZCENTRAL_CONTENT_DIR)),
       ]);
     }
   )