git(1)
======
v0.1, May 2005

NAME
----
git - the stupid content tracker


SYNOPSIS
--------
'git-<command>' <args>

DESCRIPTION
-----------

This is reference information for the core git commands.

The link:README[] contains much useful definition and clarification
info - read that first.  And of the commands, I suggest reading
'git-update-cache' and 'git-read-tree' first - I wish I had!

David Greaves <david@dgreaves.com>
08/05/05

Updated by Junio C Hamano <junkio@cox.net> on 2005-05-05 to
reflect recent changes.

Commands Overview
-----------------
The git commands can helpfully be split into those that manipulate
the repository, the cache and the working fileset and those that
interrogate and compare them.

Manipulation commands
~~~~~~~~~~~~~~~~~~~~~
link:git-apply-patch-script.html[git-apply-patch-script]::
        Sample script to apply the diffs from git-diff-*

link:git-checkout-cache.html[git-checkout-cache]::
        Copy files from the cache to the working directory

link:git-commit-tree.html[git-commit-tree]::
        Creates a new commit object

link:git-convert-cache.html[git-convert-cache]::
        Converts old-style GIT repository

link:git-http-pull.html[git-http-pull]::
        Downloads a remote GIT repository via HTTP

link:git-init-db.html[git-init-db]::
        Creates an empty git object database

link:git-local-pull.html[git-local-pull]::
        Duplicates another GIT repository on a local system

link:git-merge-base.html[git-merge-base]::
        Finds as good a common ancestor as possible for a merge

link:git-merge-one-file-script.html[git-merge-one-file-script]::
        The standard helper program to use with "git-merge-cache"

link:git-mktag.html[git-mktag]::
        Creates a tag object

link:git-prune-script.html[git-prune-script]::
        Prunes all unreachable objects from the object database

link:git-pull-script.html[git-pull-script]::
        Script used by Linus to pull and merge a remote repository

link:git-read-tree.html[git-read-tree]::
        Reads tree information into the directory cache

link:git-resolve-script.html[git-resolve-script]::
        Script used to merge two trees

link:git-rpull.html[git-rpull]::
        Pulls from a remote repository over ssh connection

link:git-tag-script.html[git-tag-script]::
        An example script to create a tag object signed with GPG

link:git-update-cache.html[git-update-cache]::
        Modifies the index or directory cache

link:git-write-blob.html[git-write-blob]::
        Creates a blob from a file

link:git-write-tree.html[git-write-tree]::
        Creates a tree from the current cache

Interrogation commands
~~~~~~~~~~~~~~~~~~~~~~
link:git-cat-file.html[git-cat-file]::
        Provide content or type information for repository objects

link:git-check-files.html[git-check-files]::
        Verify a list of files are up-to-date

link:git-diff-cache.html[git-diff-cache]::
        Compares content and mode of blobs between the cache and repository

link:git-diff-files.html[git-diff-files]::
        Compares files in the working tree and the cache

link:git-diff-tree.html[git-diff-tree]::
        Compares the content and mode of blobs found via two tree objects

link:git-diff-tree-helper.html[git-diff-tree-helper]::
        Generates patch format output for git-diff-*

link:git-export.html[git-export]::
        Exports each commit and a diff against each of its parents

link:git-fsck-cache.html[git-fsck-cache]::
        Verifies the connectivity and validity of the objects in the database

link:git-ls-files.html[git-ls-files]::
        Information about files in the cache/working directory

link:git-ls-tree.html[git-ls-tree]::
        Displays a tree object in human readable form

link:git-merge-cache.html[git-merge-cache]::
        Runs a merge for files needing merging

link:git-rev-list.html[git-rev-list]::
        Lists commit objects in reverse chronological order

link:git-rev-tree.html[git-rev-tree]::
        Provides the revision tree for one or more commits

link:git-rpush.html[git-rpush]::
        Helper "server-side" program used by git-rpull

link:git-tar-tree.html[git-tar-tree]::
        Creates a tar archive of the files in the named tree

link:git-unpack-file.html[git-unpack-file]::
        Creates a temporary file with a blob's contents

The interrogate commands may create files - and you can force them to
touch the working file set - but in general they don't


Terminology
-----------
see README for description

Identifier terminology
----------------------
<object>::
        Indicates any object sha1 identifier

<blob>::
        Indicates a blob object sha1 identifier

<tree>::
        Indicates a tree object sha1 identifier

<commit>::
        Indicates a commit object sha1 identifier

<tree-ish>::
        Indicates a tree, commit or tag object sha1 identifier.
        A command that takes a <tree-ish> argument ultimately
        wants to operate on a <tree> object but automatically
        dereferences <commit> and <tag> that points at a
        <tree>.

<type>::
        Indicates that an object type is required.
        Currently one of: blob/tree/commit/tag

<file>::
        Indicates a filename - always relative to the root of
        the tree structure GIT_INDEX_FILE describes.

Terminology
-----------
Each line contains terms used interchangeably

 object database, .git directory
 directory cache, index
 id, sha1, sha1-id, sha1 hash
 type, tag
 blob, blob object
 tree, tree object
 commit, commit object
 parent
 root object
 changeset


Environment Variables
---------------------
Various git commands use the following environment variables:

- 'GIT_AUTHOR_NAME'
- 'GIT_AUTHOR_EMAIL'
- 'GIT_AUTHOR_DATE'
- 'GIT_COMMITTER_NAME'
- 'GIT_COMMITTER_EMAIL'
- 'GIT_DIFF_OPTS'
- 'GIT_EXTERNAL_DIFF'
- 'GIT_INDEX_FILE'
- 'GIT_OBJECT_DIRECTORY'
- 'GIT_ALTERNATE_OBJECT_DIRECTORIES'


Author
------
Written by Linus Torvalds <torvalds@osdl.org>

Documentation
--------------
Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel.org>.

GIT
---
Part of the link:git.html[git] suite