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Shawn O. Pearce ed5fe8af9a Remove unnecessary region locking from LockFile
The lock file protocol relies on the atomic creation of a standardized
name in the parent directory of the file being updated.  Since the
creation is atomic, at most one thread in any process can succeed on
this creation, and all others will fail.  While the lock file exists,
that file is private to the thread that is writing it, and no others
will attempt to read or modify the file.

Consequently the use of the region level locks around the file are
unnecessary, and may actually reduce performance when using NFS, SMB,
or some other sort of remote filesystem that supports locking.

Change-Id: Ice312b6fb4fdf9d36c734c3624c6d0537903913b
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2010-11-12 13:38:06 -08:00
org.eclipse.jgit Remove unnecessary region locking from LockFile 2010-11-12 13:38:06 -08:00
org.eclipse.jgit.console Add FindBugs and CPD to the build. 2010-10-23 12:26:00 +02:00
org.eclipse.jgit.http.server Add FindBugs and CPD to the build. 2010-10-23 12:26:00 +02:00
org.eclipse.jgit.http.test Externalize strings in TransportHttp 2010-10-08 01:03:17 +03:00
org.eclipse.jgit.iplog Merge "Define DiffAlgorithm as an abstract function" 2010-09-17 15:08:27 -04:00
org.eclipse.jgit.junit Comment the use of System.gc in LocalDiskRepositoryTestCase 2010-09-28 23:27:20 +02:00
org.eclipse.jgit.packaging Update build to use tycho 0.10.0 2010-10-08 11:00:51 +02:00
org.eclipse.jgit.pgm Merge "Make Repository.shortenRefName static" 2010-11-08 17:42:21 -05:00
org.eclipse.jgit.test Merge "Fix broken MergeCommandTest" 2010-11-09 18:58:34 -05:00
org.eclipse.jgit.ui Fix FindBugs and Eclipse warnings in org.eclipse.jgit.ui 2010-10-28 16:37:49 +02:00
tools Clean up LICENSE file 2010-07-02 14:52:49 -07:00
.eclipse_iplog Update .eclipse_iplog for 0.9 2010-09-08 23:17:54 +02:00
.gitattributes Initial JGit contribution to eclipse.org 2009-09-29 16:47:03 -07:00
LICENSE Clean up LICENSE file 2010-07-02 14:52:49 -07:00
README Initial JGit contribution to eclipse.org 2009-09-29 16:47:03 -07:00
SUBMITTING_PATCHES Correcting explanation of EDL 2009-10-28 14:12:07 +01:00
pom.xml Add FindBugs and CPD to the build. 2010-10-23 12:26:00 +02:00

README

            == Java GIT ==

This package is licensed under the BSD.

  org.eclipse.jgit/

    A pure Java library capable of being run standalone, with no
    additional support libraries.  Some JUnit tests are provided
    to exercise the library.  The library provides functions to
    read and write a GIT formatted repository.

    All portions of jgit are covered by the BSD.  Absolutely no GPL,
    LGPL or EPL contributions are accepted within this package.

  org.eclipse.jgit.test/
    Unit tests for org.eclipse.jgit and the same licensing rules.

            == WARNINGS / CAVEATS              ==

- Symbolic links are not supported because java does not support it.
  Such links could be damaged.

- Only the timestamp of the index is used by jgit check if  the index
  is dirty.

- Don't try the library with a JDK other than 1.6 (Java 6) unless you
  are prepared to investigate problems yourself. JDK 1.5.0_11 and later
  Java 5 versions *may* work. Earlier versions do not. JDK 1.4 is *not*
  supported. Apple's Java 1.5.0_07 is reported to work acceptably. We
  have no information about other vendors. Please report your findings
  if you try.

- CRLF conversion is never performed. On Windows you should thereforc
  make sure your projects and workspaces are configured to save files
  with Unix (LF) line endings.

            == Package Features                ==

  org.eclipse.jgit/

    * Read loose and packed commits, trees, blobs, including
      deltafied objects.

    * Read objects from shared repositories

    * Write loose commits, trees, blobs.

    * Write blobs from local files or Java InputStreams.

    * Read blobs as Java InputStreams.

    * Copy trees to local directory, or local directory to a tree.

    * Lazily loads objects as necessary.

    * Read and write .git/config files.

    * Create a new repository.

    * Read and write refs, including walking through symrefs.

    * Read, update and write the Git index.

    * Checkout in dirty working directory if trivial.

    * Walk the history from a given set of commits looking for commits
      introducing changes in files under a specified path.

    * Object transport
      Fetch via ssh, git, http, Amazon S3 and bundles.
      Push via ssh, git and Amazon S3. JGit does not yet deltify
      the pushed packs so they may be a lot larger than C Git packs.

  org.eclipse.jgit.pgm/

    * Assorted set of command line utilities. Mostly for ad-hoc testing of jgit
      log, glog, fetch etc.

            == Missing Features                ==

There are a lot of missing features. You need the real Git for this.
For some operations it may just be the preferred solution also. There
are not just a command line, there is e.g. git-gui that makes committing
partial files simple.

- Merging. 

- Repacking.

- Generate a GIT format patch.

- Apply a GIT format patch.

- Documentation. :-)

- gitattributes support
  In particular CRLF conversion is not implemented. Files are treated
  as byte sequences.

- submodule support
  Submodules are not supported or even recognized.

            == Support                         ==

  Post question, comments or patches to the git@vger.kernel.org mailing list.


            == Contributing                    ==

  See SUBMITTING_PATCHES in this directory. However, feedback and bug reports
  are also contributions.


            == About GIT                       ==

More information about GIT, its repository format, and the canonical
C based implementation can be obtained from the GIT websites:

  http://git.or.cz/
  http://www.kernel.org/pub/software/scm/git/
  http://www.kernel.org/pub/software/scm/git/docs/