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Martin Fick f6928f5736 Revert "RefDirectory: Throw exception if CAS of packed ref list fails" 
This reverts commit 9c33f7364d.

Reason for revert: This change was based on the false claim that the
packedrefs file lock is held while the CAS is being done, but it is
actually released before the CAS (the in memory lock is still held,
however that does not prevent external actors from updating the
packedrefs files and then another thread from subsequently re-reading it
and updating the in memory packedRefList). Although reverting this
change can cause the CAS to fail, it should not actually matter since
the failure would indicate that another thread has already updated the
in memory packedRefList to either the same version this thread was
trying to update it too, or to a more recent version. Either way,
failing the CAS is then appropriate and should not be problematic.

Although this change reverts the code in the RefDirectory class, it
keeps the "improvements" to the test so that it continues to pass
reliably. The reason for the quotes around the word "improvements" is
because I believe the test alteration actually dramatically changes the
intent of the test, and that the original intent of the test is
untestable with the GC and RefDirectory classes as is.

Bug: 582044
Change-Id: I3acee7527bb542996dcdfaddfb2bdb45ec444db5
Signed-off-by: Martin Fick <quic_mfick@quicinc.com>
(cherry picked from commit c5617711a1)
 		2023-06-07 19:08:39 -04:00
.mvn Remove blank in maven.config 2023-04-15 00:42:22 +02:00
.settings Add resource preferences for top level jgit project 2019-12-16 11:20:12 +01:00
Documentation Add pack options to preserve and prune old pack files 2023-02-11 01:19:28 +01:00
lib Use slf4j-simple instead of log4j for logging 2021-12-31 01:09:52 +01:00
org.eclipse.jgit Revert "RefDirectory: Throw exception if CAS of packed ref list fails" 2023-06-07 19:08:39 -04:00
org.eclipse.jgit.ant Prepare 5.13.2-SNAPSHOT builds 2022-06-14 00:41:18 +02:00
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org.eclipse.jgit.benchmarks [benchmarks] Remove profiler configuration 2022-11-15 23:08:20 +01:00
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org.eclipse.jgit.pgm Add pack options to preserve and prune old pack files 2023-02-11 01:19:28 +01:00
org.eclipse.jgit.pgm.test Prepare 5.13.2-SNAPSHOT builds 2022-06-14 00:41:18 +02:00
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org.eclipse.jgit.test GcConcurrentTest: @Ignore flaky testInterruptGc 2023-04-27 01:00:58 +02:00
org.eclipse.jgit.ui Prepare 5.13.2-SNAPSHOT builds 2022-06-14 00:41:18 +02:00
tools Demote severity of some error prone bug patterns to warnings 2023-04-26 21:07:41 +02:00
.bazelrc Bazel: Add workspace status command to stamp final artifact 2020-07-17 01:10:15 +02:00
.bazelversion Bump bazel version to 4.0.0 2021-02-07 23:06:25 +01:00
.gitattributes Initial JGit contribution to eclipse.org 2009-09-29 16:47:03 -07:00
.gitignore .gitignore: remove editor- and OS-specific files 2019-04-01 13:38:00 -07:00
.mailmap Update .mailmap 2018-09-25 19:03:22 -04:00
BUILD Migrate to Apache MINA sshd 2.6.0 and Orbit I20210203173513 2021-02-04 08:35:12 +01:00
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CONTRIBUTING.md CONTRIBUTING: add explicit link to ECA 2021-06-15 14:01:00 +02:00
DEPENDENCIES Update Orbit to S20210817231813 2021-08-23 11:53:15 +02:00
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README.md

Java Git

An implementation of the Git version control system in pure Java.

This project is licensed under the EDL (Eclipse Distribution License).

JGit can be imported straight into Eclipse and built and tested from there. It can be built from the command line using Maven or Bazel. The CI builds use Maven and run on Jenkins.

  • org.eclipse.jgit

    A pure Java library capable of being run standalone, with no additional support libraries. It provides classes to read and write a Git repository and operate on a working directory.

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

  • org.eclipse.jgit.ant

    Ant tasks based on JGit.

  • org.eclipse.jgit.archive

    Support for exporting to various archive formats (zip etc).

  • org.eclipse.jgit.http.apache

    Apache httpclient support.

  • org.eclipse.jgit.http.server

    Server for the smart and dumb Git HTTP protocol.

  • org.eclipse.jgit.lfs

    Support for LFS (Large File Storage).

  • org.eclipse.jgit.lfs.server

    Basic LFS server support.

  • org.eclipse.jgit.packaging

    Production of Eclipse features and p2 repository for JGit. See the JGit Wiki on why and how to use this module.

  • org.eclipse.jgit.pgm

    Command-line interface Git commands implemented using JGit ("pgm" stands for program).

  • org.eclipse.jgit.ssh.apache

    Client support for the ssh protocol based on Apache Mina sshd.

  • org.eclipse.jgit.ui

    Simple UI for displaying git log.

Tests

  • org.eclipse.jgit.junit, org.eclipse.jgit.junit.http, org.eclipse.jgit.junit.ssh: Helpers for unit testing
  • org.eclipse.jgit.ant.test: Unit tests for org.eclipse.jgit.ant
  • org.eclipse.jgit.http.test: Unit tests for org.eclipse.jgit.http.server
  • org.eclipse.jgit.lfs.server.test: Unit tests for org.eclipse.jgit.lfs.server
  • org.eclipse.jgit.lfs.test: Unit tests for org.eclipse.jgit.lfs
  • org.eclipse.jgit.pgm.test: Unit tests for org.eclipse.jgit.pgm
  • org.eclipse.jgit.ssh.apache.test: Unit tests for org.eclipse.jgit.ssh.apache
  • org.eclipse.jgit.test: Unit tests for org.eclipse.jgit

Warnings/Caveats

  • Native symbolic links are supported, provided the file system supports them. For Windows you must use a non-administrator account and have the SeCreateSymbolicLinkPrivilege.

  • Only the timestamp of the index is used by JGit if the index is dirty.

  • JGit requires at least a Java 8 JDK.

  • CRLF conversion is performed depending on the core.autocrlf setting, however Git for Windows by default stores that setting during installation in the "system wide" configuration file. If Git is not installed, use the global or repository configuration for the core.autocrlf setting.

  • The system wide configuration file is located relative to where C Git is installed. Make sure Git can be found via the PATH environment variable. When installing Git for Windows check the "Run Git from the Windows Command Prompt" option. There are other options like Eclipse settings that can be used for pointing out where C Git is installed. Modifying PATH is the recommended option if C Git is installed.

  • We try to use the same notation of $HOME as C Git does. On Windows this is often not the same value as the user.home system property.

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.

    • Garbage collection

    • Merge

    • Rebase

    • And much more

  • org.eclipse.jgit.pgm

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

  • org.eclipse.jgit.ant

    • Ant tasks

  • org.eclipse.jgit.archive

    • Support for Zip/Tar and other formats

  • org.eclipse.http

    • HTTP client and server support

Missing Features

There are some missing features:

  • verifying signed commits
  • signing tags
  • signing push

Support

Post questions, comments or discussions to the jgit-dev@eclipse.org mailing list. You need to be subscribed to post. File bugs and enhancement requests in Bugzilla.

Contributing

See the EGit Contributor Guide.

About Git

More information about Git, its repository format, and the canonical C based implementation can be obtained from the Git website.