+ few performance improvement

src/installer/kiwix-install.cpp

@@ -152,19 +152,14 @@ int main(int argc, char **argv) {
 
     /* Copy the file to the data/content directory */
     string newContentPath = computeAbsolutePath(dataContentPath, contentFilename);
+    if (!fileExists(newContentPath) || getFileSize(contentPath) != getFileSize(newContentPath)) {
       copyFile(contentPath, newContentPath);
-
-    /* Add the file to the library.xml */
-    string libraryPath = computeAbsolutePath(dataLibraryPath, contentFilename + ".xml");
-    kiwix::Manager libraryManager;
-    if (libraryManager.addBookFromPath(newContentPath, "../content/" + contentFilename, "", false)) {
-      libraryManager.writeFile(libraryPath);
-    } else {
-      cerr << "Unable to build or save library file '" << libraryPath << "'" << endl;
     }
 
     /* Index the file if necessary */
-    string indexPath = computeAbsolutePath(dataIndexPath, contentFilename + ".idx");
+    string indexFilename = contentFilename + ".idx";
+    string indexPath = computeAbsolutePath(dataIndexPath, indexFilename);
+    if (buildIndexFlag && !fileExists(indexPath)) {
       kiwix::Indexer *indexer = NULL;
       try {
 	if (backend == CLUCENE) {
@@ -186,5 +181,20 @@ int main(int argc, char **argv) {
       }
     }
     
+    /* Add the file to the library.xml */
+    kiwix::Manager libraryManager;
+    string libraryPath = computeAbsolutePath(dataLibraryPath, contentFilename + ".xml");
+    string bookId = libraryManager.addBookFromPathAndGetId(newContentPath, "../content/" + contentFilename, "", false);
+    if (!bookId.empty()) {
+      libraryManager.setCurrentBookId(bookId);
+      if (buildIndexFlag) {
+	libraryManager.setBookIndex(bookId, "../index/" + indexFilename, kiwix::XAPIAN);
+      }
+      libraryManager.writeFile(libraryPath);
+    } else {
+      cerr << "Unable to build or save library file '" << libraryPath << "'" << endl;
+    }
+  }
+
   exit(0);
 }