Beispiel #1
0
    private void verifyPrerequisites() throws TransportException {
      if (prereqs.isEmpty()) return;

      final RevWalk rw = new RevWalk(local);
      final RevFlag PREREQ = rw.newFlag("PREREQ");
      final RevFlag SEEN = rw.newFlag("SEEN");

      final List<ObjectId> missing = new ArrayList<ObjectId>();
      final List<RevObject> commits = new ArrayList<RevObject>();
      for (final ObjectId p : prereqs) {
        try {
          final RevCommit c = rw.parseCommit(p);
          if (!c.has(PREREQ)) {
            c.add(PREREQ);
            commits.add(c);
          }
        } catch (MissingObjectException notFound) {
          missing.add(p);
        } catch (IOException err) {
          throw new TransportException(uri, "Cannot read commit " + p.name(), err);
        }
      }
      if (!missing.isEmpty()) throw new MissingBundlePrerequisiteException(uri, missing);

      for (final Ref r : local.getAllRefs().values()) {
        try {
          rw.markStart(rw.parseCommit(r.getObjectId()));
        } catch (IOException readError) {
          // If we cannot read the value of the ref skip it.
        }
      }

      int remaining = commits.size();
      try {
        RevCommit c;
        while ((c = rw.next()) != null) {
          if (c.has(PREREQ)) {
            c.add(SEEN);
            if (--remaining == 0) break;
          }
        }
      } catch (IOException err) {
        throw new TransportException(uri, "Cannot read object", err);
      }

      if (remaining > 0) {
        for (final RevObject o : commits) {
          if (!o.has(SEEN)) missing.add(o);
        }
        throw new MissingBundlePrerequisiteException(uri, missing);
      }
    }
  private void markReachable(final Set<ObjectId> have, final int maxTime) throws IOException {
    for (final Ref r : local.getAllRefs().values()) {
      try {
        final RevCommit o = walk.parseCommit(r.getObjectId());
        o.add(REACHABLE);
        reachableCommits.add(o);
      } catch (IOException readError) {
        // If we cannot read the value of the ref skip it.
      }
    }

    for (final ObjectId id : have) {
      try {
        final RevCommit o = walk.parseCommit(id);
        o.add(REACHABLE);
        reachableCommits.add(o);
      } catch (IOException readError) {
        // If we cannot read the value of the ref skip it.
      }
    }

    if (maxTime > 0) {
      // Mark reachable commits until we reach maxTime. These may
      // wind up later matching up against things we want and we
      // can avoid asking for something we already happen to have.
      //
      final Date maxWhen = new Date(maxTime * 1000L);
      walk.sort(RevSort.COMMIT_TIME_DESC);
      walk.markStart(reachableCommits);
      walk.setRevFilter(CommitTimeRevFilter.after(maxWhen));
      for (; ; ) {
        final RevCommit c = walk.next();
        if (c == null) break;
        if (c.has(ADVERTISED) && !c.has(COMMON)) {
          // This is actually going to be a common commit, but
          // our peer doesn't know that fact yet.
          //
          c.add(COMMON);
          c.carry(COMMON);
          reachableCommits.add(c);
        }
      }
    }
  }
  private void recreateCommitGraph() throws IOException {
    final RevWalk rw = new RevWalk(db);
    final Map<ObjectId, ToRewrite> toRewrite = new HashMap<ObjectId, ToRewrite>();
    List<ToRewrite> queue = new ArrayList<ToRewrite>();
    final BufferedReader br =
        new BufferedReader(new InputStreamReader(new FileInputStream(graph), Constants.CHARSET));
    try {
      String line;
      while ((line = br.readLine()) != null) {
        final String[] parts = line.split("[ \t]{1,}");
        final ObjectId oldId = ObjectId.fromString(parts[0]);
        try {
          rw.parseCommit(oldId);
          // We have it already. Don't rewrite it.
          continue;
        } catch (MissingObjectException mue) {
          // Fall through and rewrite it.
        }

        final long time = Long.parseLong(parts[1]) * 1000L;
        final ObjectId[] parents = new ObjectId[parts.length - 2];
        for (int i = 0; i < parents.length; i++) {
          parents[i] = ObjectId.fromString(parts[2 + i]);
        }

        final ToRewrite t = new ToRewrite(oldId, time, parents);
        toRewrite.put(oldId, t);
        queue.add(t);
      }
    } finally {
      br.close();
    }

    pm.beginTask("Rewriting commits", queue.size());
    final ObjectWriter ow = new ObjectWriter(db);
    final ObjectId emptyTree = ow.writeTree(new Tree(db));
    final PersonIdent me =
        new PersonIdent("jgit rebuild-commitgraph", "rebuild-commitgraph@localhost");
    while (!queue.isEmpty()) {
      final ListIterator<ToRewrite> itr = queue.listIterator(queue.size());
      queue = new ArrayList<ToRewrite>();
      REWRITE:
      while (itr.hasPrevious()) {
        final ToRewrite t = itr.previous();
        final ObjectId[] newParents = new ObjectId[t.oldParents.length];
        for (int k = 0; k < t.oldParents.length; k++) {
          final ToRewrite p = toRewrite.get(t.oldParents[k]);
          if (p != null) {
            if (p.newId == null) {
              // Must defer until after the parent is rewritten.
              queue.add(t);
              continue REWRITE;
            } else {
              newParents[k] = p.newId;
            }
          } else {
            // We have the old parent object. Use it.
            //
            newParents[k] = t.oldParents[k];
          }
        }

        final Commit newc = new Commit(db);
        newc.setTreeId(emptyTree);
        newc.setAuthor(new PersonIdent(me, new Date(t.commitTime)));
        newc.setCommitter(newc.getAuthor());
        newc.setParentIds(newParents);
        newc.setMessage("ORIGINAL " + t.oldId.name() + "\n");
        t.newId = ow.writeCommit(newc);
        rewrites.put(t.oldId, t.newId);
        pm.update(1);
      }
    }
    pm.endTask();
  }