Google Git
Sign in
gerrit / jgit / d4e855882b7605491fdd98d5feac00e9f6c42204
commitd4e855882b7605491fdd98d5feac00e9f6c42204[log] [tgz]
authorIvan Frade <ifrade@google.com>Thu Oct 23 12:53:46 2025 -0700
committerIvan Frade <ifrade@google.com>Thu Oct 23 13:49:59 2025 -0700
tree18650a20cd4dbb2649c40da084e803a231d1f8d3
parentdd4a19442f89bcffc8e646f3a68e3da3d62c20b5 [diff]
DfsPackFile: asObjectIdSet() when only inclusion is needed.

For midx is complicated to implement the primary index. Some of the
callers use the primary index for inclusion (ignoring order or
offset). They can still do the object lookups at the pack level, but
that introduces extra instruction per object.

Offer a "asObjectIdSet" view of the pack to just check inclusion. This
works for regular packs and midxs and skips the extra instructions of
the pack checking if the index is loaded each time.

Change-Id: I72e6e6c4c5998c1e2acd5325bb0beabe6a6a6964
3 files changed
tree: 18650a20cd4dbb2649c40da084e803a231d1f8d3
  1. .github/
  2. .mvn/
  3. .settings/
  4. Documentation/
  5. lib/
  6. org.eclipse.jgit/
  7. org.eclipse.jgit.ant/
  8. org.eclipse.jgit.ant.test/
  9. org.eclipse.jgit.archive/
  10. org.eclipse.jgit.benchmarks/
  11. org.eclipse.jgit.coverage/
  12. org.eclipse.jgit.gpg.bc/
  13. org.eclipse.jgit.gpg.bc.test/
  14. org.eclipse.jgit.http.apache/
  15. org.eclipse.jgit.http.server/
  16. org.eclipse.jgit.http.test/
  17. org.eclipse.jgit.junit/
  18. org.eclipse.jgit.junit.http/
  19. org.eclipse.jgit.junit.ssh/
  20. org.eclipse.jgit.lfs/
  21. org.eclipse.jgit.lfs.server/
  22. org.eclipse.jgit.lfs.server.test/
  23. org.eclipse.jgit.lfs.test/
  24. org.eclipse.jgit.packaging/
  25. org.eclipse.jgit.pgm/
  26. org.eclipse.jgit.pgm.test/
  27. org.eclipse.jgit.ssh.apache/
  28. org.eclipse.jgit.ssh.apache.agent/
  29. org.eclipse.jgit.ssh.apache.test/
  30. org.eclipse.jgit.ssh.jsch/
  31. org.eclipse.jgit.ssh.jsch.test/
  32. org.eclipse.jgit.test/
  33. org.eclipse.jgit.ui/
  34. tools/
  35. .bazelrc
  36. .bazelversion
  37. .gitattributes
  38. .gitignore
  39. .mailmap
  40. BUILD
  41. CODE_OF_CONDUCT.md
  42. CONTRIBUTING.md
  43. LICENSE
  44. MODULE.bazel
  45. pom.xml
  46. README.md
  47. SECURITY.md
  48. WORKSPACE
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.ssh.apache.agent

    Optional support for SSH agents for org.eclipse.jgit.ssh.apache.

  • 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 6.0 and newer requires at least Java 11. Older versions require at least Java 1.8.

  • 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, http, 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:

  • signing push
  • shallow and partial cloning
  • support for remote helpers
  • support for credential helpers
  • support for multiple working trees (git-worktree)
  • using external diff tools
  • support for HTTPS client certificates
  • SHA-256 object IDs
  • git protocol V2 (client side): packfile-uris
  • multi-pack index
  • split index

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.