refs #99 - reverted to using relative paths and added test to ensure

that format for fetch file is correct

This reverts commit e7e76da.

src/main/java/gov/loc/repository/bagit/writer/BagWriter.java

@@ -61,7 +61,7 @@ public static void write(final Bag bag, final Path outputDir) throws IOException
     }
     if(bag.getItemsToFetch().size() > 0){
       logger.debug(messages.getString("writing_fetch_file"));
-      FetchWriter.writeFetchFile(bag.getItemsToFetch(), bagitDir, bag.getFileEncoding());
+      FetchWriter.writeFetchFile(bag.getItemsToFetch(), bagitDir, bag.getRootDir(), bag.getFileEncoding());
     }
     if(bag.getTagManifests().size() > 0){
       logger.debug(messages.getString("writing_tag_manifests"));

src/main/java/gov/loc/repository/bagit/writer/FetchWriter.java

@@ -29,22 +29,23 @@ private FetchWriter(){
    * 
    * @param itemsToFetch the list of {@link FetchItem}s to write into the fetch.txt
    * @param outputDir the root of the bag
+   * @param bagitRootDir the path to the root of the bag
    * @param charsetName the name of the encoding for the file
    * 
    * @throws IOException if there was a problem writing a file
    */
-  public static void writeFetchFile(final List<FetchItem> itemsToFetch, final Path outputDir, final Charset charsetName) throws IOException{
+  public static void writeFetchFile(final List<FetchItem> itemsToFetch, final Path outputDir, final Path bagitRootDir, final Charset charsetName) throws IOException{
     logger.debug(messages.getString("writing_fetch_file_to_path"), outputDir);
     final Path fetchFilePath = outputDir.resolve("fetch.txt");
 
     for(final FetchItem item : itemsToFetch){
-      final String line = formatFetchLine(item);
+      final String line = formatFetchLine(item, bagitRootDir);
       logger.debug(messages.getString("writing_line_to_file"), line, fetchFilePath);
       Files.write(fetchFilePath, line.getBytes(charsetName), StandardOpenOption.APPEND, StandardOpenOption.CREATE);
     }
   }
 
-  private static String formatFetchLine(final FetchItem fetchItem){
+  private static String formatFetchLine(final FetchItem fetchItem, final Path bagitRootDir){
     final StringBuilder sb = new StringBuilder();
     sb.append(fetchItem.getUrl()).append(' ');
 
@@ -55,7 +56,7 @@ private static String formatFetchLine(final FetchItem fetchItem){
       sb.append(fetchItem.getLength()).append(' ');
     }
 
-    sb.append(fetchItem.getPath());
+    sb.append(RelativePathWriter.formatRelativePathString(bagitRootDir, fetchItem.getPath()));
 
     return sb.toString();
   }

src/test/java/gov/loc/repository/bagit/writer/FetchWriterTest.java

@@ -4,8 +4,10 @@
 import java.lang.reflect.InvocationTargetException;
 import java.net.URL;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
@@ -37,7 +39,32 @@ public void testWriteFetchFile() throws Exception{
 
 
     assertFalse(fetch.exists());
-    FetchWriter.writeFetchFile(itemsToFetch, Paths.get(rootDir.toURI()), StandardCharsets.UTF_8);
+    FetchWriter.writeFetchFile(itemsToFetch, Paths.get(rootDir.toURI()), rootPath, StandardCharsets.UTF_8);
     assertTrue(fetch.exists());
   }
+
+  @Test
+  public void testFetchFileIsFormattedCorrectly() throws Exception{
+    File rootDir = folder.newFolder();
+    Path rootPath = rootDir.toPath();
+    File fetch = new File(rootDir, "fetch.txt");
+    List<FetchItem> itemsToFetch = new ArrayList<>();
+
+    itemsToFetch.add(new FetchItem(new URL("http://localhost:8989/bags/v0_96/holey-bag/data/dir1/test3.txt"), null, rootPath.resolve("data/dir1/test3.txt")));
+    itemsToFetch.add(new FetchItem(new URL("http://localhost:8989/bags/v0_96/holey-bag/data/dir2/dir3/test5.txt"), null, rootPath.resolve("data/dir2/dir3/test5.txt")));
+    itemsToFetch.add(new FetchItem(new URL("http://localhost:8989/bags/v0_96/holey-bag/data/dir2/test4.txt"), null, rootPath.resolve("data/dir2/test4.txt")));
+    itemsToFetch.add(new FetchItem(new URL("http://localhost:8989/bags/v0_96/holey-bag/data/test%201.txt"), null, rootPath.resolve("data/test 1.txt")));
+    itemsToFetch.add(new FetchItem(new URL("http://localhost:8989/bags/v0_96/holey-bag/data/test2.txt"), null, rootPath.resolve("data/test2.txt")));
+
+    FetchWriter.writeFetchFile(itemsToFetch, Paths.get(rootDir.toURI()), rootPath, StandardCharsets.UTF_8);
+
+    List<String> expectedLines = Arrays.asList("http://localhost:8989/bags/v0_96/holey-bag/data/dir1/test3.txt - data/dir1/test3.txt", 
+        "http://localhost:8989/bags/v0_96/holey-bag/data/dir2/dir3/test5.txt - data/dir2/dir3/test5.txt", 
+        "http://localhost:8989/bags/v0_96/holey-bag/data/dir2/test4.txt - data/dir2/test4.txt", 
+        "http://localhost:8989/bags/v0_96/holey-bag/data/test%201.txt - data/test 1.txt",
+        "http://localhost:8989/bags/v0_96/holey-bag/data/test2.txt - data/test2.txt");
+    List<String> actualLines = Files.readAllLines(fetch.toPath());
+
+    assertEquals(expectedLines, actualLines);
+  }
 }