git/Documentation/git.txt

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.

There are also some ancilliary programs that can be viewed as useful
aids for using the core commands but which are unlikely to be used by
SCMs layered over git.

Manipulation commands
~~~~~~~~~~~~~~~~~~~~~
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-init-db.html[git-init-db]::
	Creates an empty git object database

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

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

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

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-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-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


Ancilliary Commands
-------------------
Manipulators:

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

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

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

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

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

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

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

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

Interogators:

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

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



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