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Documentation/git-worktree: split technical info from general description

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The DESCRIPTION section should provide a high-level overview of linked
worktree functionality to bring users up to speed quickly, without
overloading them with low-level details, so relocate the technical
information to a new DETAILS section.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Eric Sunshine 2015-07-06 13:30:42 -04:00 committed by Junio C Hamano
parent 6d3824cf92
commit af189b4cbe
1 changed files with 36 additions and 34 deletions
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70
Documentation/git-worktree.txt
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@ -24,47 +24,18 @@ tree is associated with the repository. This new working tree is called a
init" or "git clone". A repository has one main working tree (if it's not a
bare repository) and zero or more linked working trees.
Each linked working tree has a private sub-directory in the repository's
$GIT_DIR/worktrees directory. The private sub-directory's name is usually
the base name of the linked working tree's path, possibly appended with a
number to make it unique. For example, when `$GIT_DIR=/path/main/.git` the
command `git checkout --to /path/other/test-next next` creates the linked
working tree in `/path/other/test-next` and also creates a
`$GIT_DIR/worktrees/test-next` directory (or `$GIT_DIR/worktrees/test-next1`
if `test-next` is already taken).
Within a linked working tree, $GIT_DIR is set to point to this private
directory (e.g. `/path/main/.git/worktrees/test-next` in the example) and
$GIT_COMMON_DIR is set to point back to the main working tree's $GIT_DIR
(e.g. `/path/main/.git`). These settings are made in a `.git` file located at
the top directory of the linked working tree.
Path resolution via `git rev-parse --git-path` uses either
$GIT_DIR or $GIT_COMMON_DIR depending on the path. For example, in the
linked working tree `git rev-parse --git-path HEAD` returns
`/path/main/.git/worktrees/test-next/HEAD` (not
`/path/other/test-next/.git/HEAD` or `/path/main/.git/HEAD`) while `git
rev-parse --git-path refs/heads/master` uses
$GIT_COMMON_DIR and returns `/path/main/.git/refs/heads/master`,
since refs are shared across all working trees.
See linkgit:gitrepository-layout[5] for more information. The rule of
thumb is do not make any assumption about whether a path belongs to
$GIT_DIR or $GIT_COMMON_DIR when you need to directly access something
inside $GIT_DIR. Use `git rev-parse --git-path` to get the final path.
When you are done with a linked working tree you can simply delete it.
The working tree's entry in the repository's $GIT_DIR/worktrees
directory will eventually be removed automatically (see
The working tree's administrative files in the repository (see
"DETAILS" below) will eventually be removed automatically (see
`gc.pruneworktreesexpire` in linkgit::git-config[1]), or you can run
`git worktree prune` in the main or any linked working tree to
clean up any stale entries in $GIT_DIR/worktrees.
clean up any stale administrative files.
If you move a linked working directory to another file system, or
within a file system that does not support hard links, you need to run
at least one git command inside the linked working directory
(e.g. `git status`) in order to update its entry in $GIT_DIR/worktrees
so that it does not get automatically removed.
(e.g. `git status`) in order to update its administrative files in the
repository so that they do not get automatically pruned.
To prevent a $GIT_DIR/worktrees entry from from being pruned (which
can be useful in some situations, such as when the
@ -97,6 +68,37 @@ OPTIONS
--expire <time>::
With `prune`, only expire unused worktrees older than <time>.
DETAILS
-------
Each linked working tree has a private sub-directory in the repository's
$GIT_DIR/worktrees directory. The private sub-directory's name is usually
the base name of the linked working tree's path, possibly appended with a
number to make it unique. For example, when `$GIT_DIR=/path/main/.git` the
command `git checkout --to /path/other/test-next next` creates the linked
working tree in `/path/other/test-next` and also creates a
`$GIT_DIR/worktrees/test-next` directory (or `$GIT_DIR/worktrees/test-next1`
if `test-next` is already taken).
Within a linked working tree, $GIT_DIR is set to point to this private
directory (e.g. `/path/main/.git/worktrees/test-next` in the example) and
$GIT_COMMON_DIR is set to point back to the main working tree's $GIT_DIR
(e.g. `/path/main/.git`). These settings are made in a `.git` file located at
the top directory of the linked working tree.
Path resolution via `git rev-parse --git-path` uses either
$GIT_DIR or $GIT_COMMON_DIR depending on the path. For example, in the
linked working tree `git rev-parse --git-path HEAD` returns
`/path/main/.git/worktrees/test-next/HEAD` (not
`/path/other/test-next/.git/HEAD` or `/path/main/.git/HEAD`) while `git
rev-parse --git-path refs/heads/master` uses
$GIT_COMMON_DIR and returns `/path/main/.git/refs/heads/master`,
since refs are shared across all working trees.
See linkgit:gitrepository-layout[5] for more information. The rule of
thumb is do not make any assumption about whether a path belongs to
$GIT_DIR or $GIT_COMMON_DIR when you need to directly access something
inside $GIT_DIR. Use `git rev-parse --git-path` to get the final path.
BUGS
----
Multiple checkout support for submodules is incomplete. It is NOT