[JGIT PATCH 07/13] Don't open a PackFile multiple times on scanForPacks

["Shawn O. Pearce" <spearce@spearce.org>]

If we already have a given PackFile open in this repository then
we should reuse the existing PackFile handle.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
---
 .../src/org/spearce/jgit/lib/PackFile.java         |    5 +++++
 .../src/org/spearce/jgit/lib/Repository.java       |    8 +++++++-
 .../src/org/spearce/jgit/lib/WindowedFile.java     |    7 ++++++-
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/org.spearce.jgit/src/org/spearce/jgit/lib/PackFile.java b/org.spearce.jgit/src/org/spearce/jgit/lib/PackFile.java
index ca5681b..fc1b6ea 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/lib/PackFile.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/lib/PackFile.java
@@ -94,6 +94,11 @@ final PackedObjectLoader resolveBase(final WindowCursor curs, final long ofs)
 		return reader(curs, ofs);
 	}
 
+	/** @return the File object which locates this pack on disk. */
+	public File getPackFile() {
+		return pack.getFile();
+	}
+
 	/**
 	 * Determine if an object is contained within the pack file.
 	 * <p>
diff --git a/org.spearce.jgit/src/org/spearce/jgit/lib/Repository.java b/org.spearce.jgit/src/org/spearce/jgit/lib/Repository.java
index 89ad991..8f6e96e 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/lib/Repository.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/lib/Repository.java
@@ -825,6 +825,7 @@ synchronized (this) {
 	 */
 	public void scanForPacks() {
 		final ArrayList<PackFile> p = new ArrayList<PackFile>();
+		p.addAll(Arrays.asList(packs()));
 		for (final File d : objectsDirs())
 			scanForPacks(new File(d, "pack"), p);
 		final PackFile[] arr = new PackFile[p.size()];
@@ -843,7 +844,7 @@ public boolean accept(final File baseDir, final String n) {
 			}
 		});
 		if (idxList != null) {
-			for (final String indexName : idxList) {
+			SCAN: for (final String indexName : idxList) {
 				final String n = indexName.substring(0, indexName.length() - 4);
 				final File idxFile = new File(packDir, n + ".idx");
 				final File packFile = new File(packDir, n + ".pack");
@@ -856,6 +857,11 @@ public boolean accept(final File baseDir, final String n) {
 					continue;
 				}
 
+				for (final PackFile p : packList) {
+					if (packFile.equals(p.getPackFile()))
+						continue SCAN;
+				}
+
 				try {
 					packList.add(new PackFile(this, idxFile, packFile));
 				} catch (IOException ioe) {
diff --git a/org.spearce.jgit/src/org/spearce/jgit/lib/WindowedFile.java b/org.spearce.jgit/src/org/spearce/jgit/lib/WindowedFile.java
index 454f98b..f640c42 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/lib/WindowedFile.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/lib/WindowedFile.java
@@ -101,13 +101,18 @@ public long length() {
 		return length;
 	}
 
+	/** @return the absolute file object this file reads from. */
+	public File getFile() {
+		return fPath.getAbsoluteFile();
+	}
+
 	/**
 	 * Get the path name of this file.
 	 * 
 	 * @return the absolute path name of the file.
 	 */
 	public String getName() {
-		return fPath.getAbsolutePath();
+		return getFile().getPath();
 	}
 
 	/**
-- 
1.6.1.rc4.301.g5497a