[PATCH] Implement packed refs
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
---
.../src/org/spearce/jgit/lib/Repository.java | 48 +++++++++++++++++++-
.../tst/org/spearce/jgit/lib/T0003_Basic.java | 44 ++++++++++++++++++
2 files changed, 91 insertions(+), 1 deletions(-)
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 76191be..3b2a82c 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/lib/Repository.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/lib/Repository.java
@@ -399,6 +399,7 @@ public class Repository {
private Ref readRef(final String revstr, final boolean missingOk)
throws IOException {
+ refreshPackredRefsCache();
for (int k = 0; k < refSearchPaths.length; k++) {
final Ref r = readRefBasic(refSearchPaths[k] + revstr);
if (missingOk || r.getObjectId() != null) {
@@ -411,6 +412,10 @@ public class Repository {
private Ref readRefBasic(String name) throws IOException {
int depth = 0;
REF_READING: do {
+ ObjectId id = packedRefs.get(name);
+ if (id != null)
+ return new Ref(null, id);
+
final File f = new File(getDirectory(), name);
if (!f.isFile()) {
return new Ref(f, null);
@@ -470,7 +475,43 @@ public class Repository {
}
public Collection<String> getTags() {
- return listFilesRecursively(new File(refsDir, "tags"), null);
+ Collection<String> tags = listFilesRecursively(new File(refsDir, "tags"), null);
+ refreshPackredRefsCache();
+ tags.addAll(packedRefs.keySet());
+ return tags;
+ }
+
+ private Map<String,ObjectId> packedRefs = new HashMap<String,ObjectId>();
+ private long packedrefstime = 0;
+
+ private void refreshPackredRefsCache() {
+ File file = new File(gitDir, "packed-refs");
+ if (!file.exists()) {
+ if (packedRefs.size() > 0)
+ packedRefs = new HashMap();
+ return;
+ }
+ if (file.lastModified() == packedrefstime)
+ return;
+ Map newPackedRefs = new HashMap();
+ try {
+ BufferedReader b=new BufferedReader(new FileReader(file));
+ String p;
+ while ((p = b.readLine()) != null) {
+ if (p.charAt(0) == '#')
+ continue;
+ if (p.charAt(0) == '^') {
+ continue;
+ }
+ int spos = p.indexOf(' ');
+ ObjectId id = new ObjectId(p.substring(0,spos));
+ String name = p.substring(spos+1);
+ newPackedRefs.put(name, id);
+ }
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+ packedRefs = newPackedRefs;
}
/**
@@ -551,4 +592,9 @@ public class Repository {
}
return ret;
}
+
+ /** Clean up stale caches */
+ public void refreshFromDisk() {
+ packedRefs = null;
+ }
}
diff --git a/org.spearce.jgit/tst/org/spearce/jgit/lib/T0003_Basic.java b/org.spearce.jgit/tst/org/spearce/jgit/lib/T0003_Basic.java
index 2f76907..02ecabf 100644
--- a/org.spearce.jgit/tst/org/spearce/jgit/lib/T0003_Basic.java
+++ b/org.spearce.jgit/tst/org/spearce/jgit/lib/T0003_Basic.java
@@ -21,6 +21,7 @@ import java.io.FileInputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
+import java.io.PrintWriter;
public class T0003_Basic extends RepositoryTestCase {
public void test001_Initalize() {
@@ -428,4 +429,47 @@ public class T0003_Basic extends RepositoryTestCase {
ObjectId cid = new ObjectWriter(db).writeCommit(commit);
assertEquals("2979b39d385014b33287054b87f77bcb3ecb5ebf", cid.toString());
}
+
+ public void test025_packedRefs() throws IOException {
+ test020_createBlobTag();
+ test021_createTreeTag();
+ test022_createCommitTag();
+
+ if (!new File(db.getDirectory(),"refs/tags/test020").delete()) throw new Error("Cannot delete unpacked tag");
+ if (!new File(db.getDirectory(),"refs/tags/test021").delete()) throw new Error("Cannot delete unpacked tag");
+ if (!new File(db.getDirectory(),"refs/tags/test022").delete()) throw new Error("Cannot delete unpacked tag");
+
+ // We cannot resolve it now, since we have no ref
+ Tag mapTag20missing = db.mapTag("test020");
+ assertNull(mapTag20missing);
+
+ // Construct packed refs file
+ PrintWriter w = new PrintWriter(new FileWriter(new File(db.getDirectory(), "packed-refs")));
+ w.println("# packed-refs with: peeled");
+ w.println("6759556b09fbb4fd8ae5e315134481cc25d46954 refs/tags/test020");
+ w.println("^e69de29bb2d1d6434b8b29ae775ad8c2e48c5391");
+ w.println("b0517bc8dbe2096b419d42424cd7030733f4abe5 refs/tags/test021");
+ w.println("^417c01c8795a35b8e835113a85a5c0c1c77f67fb");
+ w.println("0ce2ebdb36076ef0b38adbe077a07d43b43e3807 refs/tags/test022");
+ w.println("^b5d3b45a96b340441f5abb9080411705c51cc86c");
+ w.close();
+
+ Tag mapTag20 = db.mapTag("test020");
+ assertEquals("blob", mapTag20.getType());
+ assertEquals("test020 tagged\n", mapTag20.getMessage());
+ assertEquals(new PersonIdent(jauthor, 1154236443000L, -4 * 60), mapTag20.getAuthor());
+ assertEquals("e69de29bb2d1d6434b8b29ae775ad8c2e48c5391", mapTag20.getObjId().toString());
+
+ Tag mapTag21 = db.mapTag("test021");
+ assertEquals("tree", mapTag21.getType());
+ assertEquals("test021 tagged\n", mapTag21.getMessage());
+ assertEquals(new PersonIdent(jauthor, 1154236443000L, -4 * 60), mapTag21.getAuthor());
+ assertEquals("417c01c8795a35b8e835113a85a5c0c1c77f67fb", mapTag21.getObjId().toString());
+
+ Tag mapTag22 = db.mapTag("test022");
+ assertEquals("commit", mapTag22.getType());
+ assertEquals("test022 tagged\n", mapTag22.getMessage());
+ assertEquals(new PersonIdent(jauthor, 1154236443000L, -4 * 60), mapTag22.getAuthor());
+ assertEquals("b5d3b45a96b340441f5abb9080411705c51cc86c", mapTag22.getObjId().toString());
+ }
}
--
1.5.1.1
Robin Rosenberg <robin.rosenberg@dewire.com>