8b8f7189df
Allow the user to specify the hash algorithm on the command line by using the --object-format option to git init. Validate that the user is not attempting to reinitialize a repository with a different hash algorithm. Ensure that if we are writing a non-SHA-1 repository that we set the repository version to 1 and write the objectFormat extension. Restrict this option to work only when ENABLE_SHA256 is set until the codebase is in a situation to fully support this. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
160 lines
5.0 KiB
Plaintext
160 lines
5.0 KiB
Plaintext
git-init(1)
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===========
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NAME
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----
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git-init - Create an empty Git repository or reinitialize an existing one
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SYNOPSIS
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--------
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[verse]
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'git init' [-q | --quiet] [--bare] [--template=<template_directory>]
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[--separate-git-dir <git dir>] [--object-format=<format]
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[--shared[=<permissions>]] [directory]
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DESCRIPTION
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-----------
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This command creates an empty Git repository - basically a `.git`
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directory with subdirectories for `objects`, `refs/heads`,
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`refs/tags`, and template files. An initial `HEAD` file that
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references the HEAD of the master branch is also created.
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If the `$GIT_DIR` environment variable is set then it specifies a path
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to use instead of `./.git` for the base of the repository.
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If the object storage directory is specified via the
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`$GIT_OBJECT_DIRECTORY` environment variable then the sha1 directories
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are created underneath - otherwise the default `$GIT_DIR/objects`
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directory is used.
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Running 'git init' in an existing repository is safe. It will not
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overwrite things that are already there. The primary reason for
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rerunning 'git init' is to pick up newly added templates (or to move
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the repository to another place if --separate-git-dir is given).
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OPTIONS
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-------
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-q::
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--quiet::
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Only print error and warning messages; all other output will be suppressed.
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--bare::
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Create a bare repository. If `GIT_DIR` environment is not set, it is set to the
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current working directory.
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--object-format=<format>::
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Specify the given object format (hash algorithm) for the repository. The valid
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values are 'sha1' and (if enabled) 'sha256'. 'sha1' is the default.
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--template=<template_directory>::
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Specify the directory from which templates will be used. (See the "TEMPLATE
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DIRECTORY" section below.)
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--separate-git-dir=<git dir>::
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Instead of initializing the repository as a directory to either `$GIT_DIR` or
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`./.git/`, create a text file there containing the path to the actual
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repository. This file acts as filesystem-agnostic Git symbolic link to the
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repository.
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+
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If this is reinitialization, the repository will be moved to the specified path.
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--shared[=(false|true|umask|group|all|world|everybody|0xxx)]::
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Specify that the Git repository is to be shared amongst several users. This
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allows users belonging to the same group to push into that
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repository. When specified, the config variable "core.sharedRepository" is
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set so that files and directories under `$GIT_DIR` are created with the
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requested permissions. When not specified, Git will use permissions reported
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by umask(2).
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+
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The option can have the following values, defaulting to 'group' if no value
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is given:
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+
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--
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'umask' (or 'false')::
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Use permissions reported by umask(2). The default, when `--shared` is not
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specified.
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'group' (or 'true')::
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Make the repository group-writable, (and g+sx, since the git group may be not
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the primary group of all users). This is used to loosen the permissions of an
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otherwise safe umask(2) value. Note that the umask still applies to the other
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permission bits (e.g. if umask is '0022', using 'group' will not remove read
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privileges from other (non-group) users). See '0xxx' for how to exactly specify
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the repository permissions.
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'all' (or 'world' or 'everybody')::
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Same as 'group', but make the repository readable by all users.
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'0xxx'::
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'0xxx' is an octal number and each file will have mode '0xxx'. '0xxx' will
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override users' umask(2) value (and not only loosen permissions as 'group' and
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'all' does). '0640' will create a repository which is group-readable, but not
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group-writable or accessible to others. '0660' will create a repo that is
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readable and writable to the current user and group, but inaccessible to others.
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--
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By default, the configuration flag `receive.denyNonFastForwards` is enabled
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in shared repositories, so that you cannot force a non fast-forwarding push
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into it.
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If you provide a 'directory', the command is run inside it. If this directory
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does not exist, it will be created.
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TEMPLATE DIRECTORY
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------------------
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Files and directories in the template directory whose name do not start with a
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dot will be copied to the `$GIT_DIR` after it is created.
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The template directory will be one of the following (in order):
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- the argument given with the `--template` option;
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- the contents of the `$GIT_TEMPLATE_DIR` environment variable;
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- the `init.templateDir` configuration variable; or
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- the default template directory: `/usr/share/git-core/templates`.
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The default template directory includes some directory structure, suggested
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"exclude patterns" (see linkgit:gitignore[5]), and sample hook files.
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The sample hooks are all disabled by default. To enable one of the
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sample hooks rename it by removing its `.sample` suffix.
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See linkgit:githooks[5] for more general info on hook execution.
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EXAMPLES
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--------
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Start a new Git repository for an existing code base::
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+
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----------------
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$ cd /path/to/my/codebase
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$ git init <1>
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$ git add . <2>
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$ git commit <3>
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----------------
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+
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<1> Create a /path/to/my/codebase/.git directory.
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<2> Add all existing files to the index.
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<3> Record the pristine state as the first commit in the history.
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GIT
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---
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Part of the linkgit:git[1] suite
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