Add utility to unpack the spec.internals file

org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/misc/SpecMapUnpacker.java

@@ -0,0 +1,56 @@
+package org.hl7.fhir.convertors.misc;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.hl7.fhir.utilities.TextFile;
+import org.hl7.fhir.utilities.Utilities;
+import org.hl7.fhir.utilities.filesystem.DirectoryVisitor;
+import org.hl7.fhir.utilities.filesystem.DirectoryVisitor.IDirectoryVisitorImplementation;
+import org.hl7.fhir.utilities.filesystem.ManagedFileAccess;
+import org.hl7.fhir.utilities.npm.NpmPackage;
+
+public class SpecMapUnpacker {
+
+  public static void main(String[] args) throws IOException {
+     new SpecMapUnpacker().unpack(args[0]);
+  }
+
+  public class SpecMapScanner implements IDirectoryVisitorImplementation {
+
+    @Override
+    public boolean enterDirectory(File directory) throws IOException {
+      return true;
+    }
+
+    @Override
+    public boolean visitFile(File file) throws IOException {
+      System.out.println("Look at "+file.getAbsolutePath());
+      try {
+        NpmPackage npm = NpmPackage.fromPackage(ManagedFileAccess.inStream(file));
+        if (npm.hasFile("other", "spec.internals")) {
+          byte[] cnt = TextFile.streamToBytes(npm.load("other", "spec.internals"));
+          TextFile.bytesToFile(cnt, Utilities.path(Utilities.getDirectoryForFile(file.getAbsolutePath()), "page-map.json"));
+          System.out.println("  ...extracted");
+          return true;
+        } else {
+          System.out.println("  ...not found");
+          return false;
+        }
+        
+      } catch (Exception e) {
+        System.out.println("  ...error: "+e.getMessage());
+        return false;
+      }
+    }
+    
+  }
+  
+  private void unpack(String path) throws IOException {
+    System.out.println("Scanning "+path);
+    int count = DirectoryVisitor.visitDirectory(new SpecMapScanner(), path, "tgz");
+    System.out.println("Done. "+count+" files extracted");
+  }
+
+}