[#57] Throw an error if attempting to unpack a directory that is not a valid LevelDB database.

Author: Fyorl

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## 1.1.0
 
 ### Improvements
+ - Attempting to unpack a directory that is not a valid LevelDB database now throws an error.
  - (Jeff Hitchcock) Added the `--folders` command-line flag, and corresponding `folders` parameter to `extractPack`. When used, this option writes the pack's entries to a directory structure matching the pack's internal Folder document structure.
 
 ### Fixes

lib/package.mjs

@@ -416,7 +416,7 @@ async function extractClassicLevel(pack, dest, {
   yaml, yamlOptions, jsonOptions, log, folders, transformEntry, transformName, transformFolderName
 }) {
   // Load the directory as a ClassicLevel DB.
-  const db = new ClassicLevel(pack, { keyEncoding: "utf8", valueEncoding: "json" });
+  const db = new ClassicLevel(pack, { keyEncoding: "utf8", valueEncoding: "json", createIfMissing: false });
 
   // Build up the folder structure
   if ( folders ) {