Add --paths parameter (#1)

Extractor/Program.cs

@@ -35,14 +35,19 @@ static void Main(string[] args)
                     $"The output directory.\nDefault: {destination}",
                     x => { destination = x; } },
                 { "headers-at-end",
-                    "Ignores what the archive header says and reads entry headers from the end of the file.",
+                    "Ignores what the archive header says and reads entry headers " +
+                    "from the end of the file.",
                     x => { forceEntryHeadersAtEnd = true; } },
                 { "p=|partial=",
                     "Partial extraction, e.g.:\n" +
                     "-p=/map\n" +
                     "-p=/def,/map\n" +
                     "-p=/def/world/road.sii",
                     x => { startPaths = x.Split(","); } },
+                 { "paths=",
+                    "Same as --partial, but expects a text file containing paths to extract, " +
+                    "separated by newlines.",
+                    x => { startPaths = LoadStartPathsFromFile(x); } },
                 { "r|raw",
                     "Directly dumps the contained files with their hashed filenames rather than " +
                     "traversing the archive's directory tree. " + 
@@ -90,6 +95,14 @@ static void Main(string[] args)
             }
         }
 
+        private static string[] LoadStartPathsFromFile(string file)
+        {
+            if (!File.Exists(file)) {
+                Console.WriteLine($"File {file} does not exist");
+            }
+            return File.ReadAllLines(file).Where(l => !string.IsNullOrWhiteSpace(l)).ToArray();
+        }
+
         private static void ExtractAllInDirectory(string directory, string[] startPaths)
         {
             if (!Directory.Exists(directory))

README.md

@@ -22,6 +22,9 @@ Options:
                                -p=/map
                                -p=/def,/map
                                -p=/def/world/road.sii
+      --paths=VALUE          Same as --partial, but expects a text file
+                               containing paths to extract, separated by
+                               newlines.
   -r, --raw                  Directly dumps the contained files with their
                                hashed filenames rather than traversing the
                                archive's directory tree. This allows for the