Examples of org.eclipse.jgit.lib.Repository.resolve()

org.eclipse.jgit.lib.Repository.resolve()
Parse a git revision string and return an object id. Combinations of these operators are supported:
- HEAD, MERGE_HEAD, FETCH_HEAD
- SHA-1: a complete or abbreviated SHA-1
- refs/...: a complete reference name
- short-name: a short reference name under {@code refs/heads}, {@code refs/tags}, or {@code refs/remotes} namespace
- tag-NN-gABBREV: output from describe, parsed by treating {@code ABBREV} as an abbreviated SHA-1.
- id^: first parent of commit id, this is the same as {@code id^1}
- id^0: ensure id is a commit
- id^n: n-th parent of commit id
- id~n: n-th historical ancestor of id, by first parent. {@code id~3} is equivalent to {@code id^1^1^1} or {@code id^^^}.
- id:path: Lookup path under tree named by id
- id^{commit}: ensure id is a commit
- id^{tree}: ensure id is a tree
- id^{tag}: ensure id is a tag
- id^{blob}: ensure id is a blob
The following operators are specified by Git conventions, but are not supported by this method:
- ref@{n}: n-th version of ref as given by its reflog
- ref@{time}: value of ref at the designated time
@param revstr A git object references expression @return an ObjectId or null if revstr can't be resolved to any ObjectId @throws AmbiguousObjectException {@code revstr} contains an abbreviated ObjectId and thisrepository contains more than one object which match to the input abbreviation. @throws IncorrectObjectTypeException the id parsed does not meet the type required to finish applying the operators in the expression. @throws RevisionSyntaxException the expression is not supported by this implementation, or does not meet the standard syntax. @throws IOException on serious errors

    fetchResult = fetchFromBundle(newRepo, bundle);
    advertisedRef = fetchResult.getAdvertisedRef("refs/heads/cc");
    assertEquals(db.resolve("c").name(), advertisedRef.getObjectId().name());
    assertEquals(db.resolve("c").name(), newRepo.resolve("refs/heads/cc")
        .name());
    assertNull(newRepo.resolve("refs/heads/c"));
    assertNull(newRepo.resolve("refs/heads/a")); // still unknown


    try {
      // Check that we actually needed the first bundle
      Repository newRepo2 = createBareRepository();

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    advertisedRef = fetchResult.getAdvertisedRef("refs/heads/cc");
    assertEquals(db.resolve("c").name(), advertisedRef.getObjectId().name());
    assertEquals(db.resolve("c").name(), newRepo.resolve("refs/heads/cc")
        .name());
    assertNull(newRepo.resolve("refs/heads/c"));
    assertNull(newRepo.resolve("refs/heads/a")); // still unknown


    try {
      // Check that we actually needed the first bundle
      Repository newRepo2 = createBareRepository();
      fetchResult = fetchFromBundle(newRepo2, bundle);

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    assertFalse(new File(db.getDirectory(), "logs/refs/heads/b").exists());


    // Create new Repository instance, to reread caches and make sure our
    // assumptions are persistent.
    Repository ndb = new FileRepository(db.getDirectory());
    assertEquals(rb2, ndb.resolve("refs/heads/new/name"));
    assertNull(ndb.resolve("refs/heads/b"));
  }


  public void tryRenameWhenLocked(String toLock, String fromName,
      String toName, String headPointsTo) throws IOException {

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    // Create new Repository instance, to reread caches and make sure our
    // assumptions are persistent.
    Repository ndb = new FileRepository(db.getDirectory());
    assertEquals(rb2, ndb.resolve("refs/heads/new/name"));
    assertNull(ndb.resolve("refs/heads/b"));
  }


  public void tryRenameWhenLocked(String toLock, String fromName,
      String toName, String headPointsTo) throws IOException {
    // setup

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        final String[] parts = line.split(";", 2);
        final String sha = parts[0];
        final String version = parts[1];


        final String tag = MessageFormat.format(releaseConvention.getTagFormat(), version);
        if (repo.resolve(tag) != null) {
            log.info("Deleting tag: " + tag);
            git.tagDelete().setTags(tag).call();
        }


        git.reset().setMode(ResetCommand.ResetType.HARD).setRef(sha).call();

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  public ObjectId getHead() throws IOException {
    Repository subRepo = getRepository();
    if (subRepo == null)
      return null;
    try {
      return subRepo.resolve(Constants.HEAD);
    } finally {
      subRepo.close();
    }
  }

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    Repository subRepo = generator.getRepository();
    if (subRepo == null)
      return new SubmoduleStatus(SubmoduleStatusType.UNINITIALIZED, path,
          id);


    ObjectId headId = subRepo.resolve(Constants.HEAD);


    // Report uninitialized if no HEAD commit in submodule repository
    if (headId == null)
      return new SubmoduleStatus(SubmoduleStatusType.UNINITIALIZED, path,
          id, headId);

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    if (submoduleRepo == null)
      return zeroid;


    final ObjectId head;
    try {
      head = submoduleRepo.resolve(Constants.HEAD);
    } catch (IOException exception) {
      return zeroid;
    } finally {
      submoduleRepo.close();
    }

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   * @return object id of HEAD reference
   * @throws IOException
   */
  public ObjectId getHead() throws IOException {
    Repository subRepo = getRepository();
    return subRepo != null ? subRepo.resolve(Constants.HEAD) : null;
  }


  /**
   * Get ref that HEAD points to in the current submodule's repository
   *

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    public static void main(String[] args) throws IOException, InvalidRemoteException, TransportException, GitAPIException {
        Repository repository = cloneRepository();


        System.out.println("Having repository: " + repository.getDirectory() + " with head: " +
                repository.getRef(Constants.HEAD) + "/" + repository.resolve("HEAD") + "/" +
                repository.resolve("refs/heads/master"));


        // TODO: why do we get null here for HEAD?!? See also
// http://stackoverflow.com/questions/17979660/jgit-pull-noheadexception

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