mirror of
https://github.com/git/git.git
synced 2024-11-07 09:43:00 +01:00
a0a7e9e511
It is an unimportant implementation detail that branches and tags are stored somewhere under $GIT_DIR/refs directory. What is more important is that branches live in refs/heads and tags live in refs/tags hierarchy in the ref namespace. Signed-off-by: Junio C Hamano <gitster@pobox.com>
99 lines
3.2 KiB
Text
99 lines
3.2 KiB
Text
git-check-ref-format(1)
|
|
=======================
|
|
|
|
NAME
|
|
----
|
|
git-check-ref-format - Ensures that a reference name is well formed
|
|
|
|
SYNOPSIS
|
|
--------
|
|
[verse]
|
|
'git check-ref-format' <refname>
|
|
'git check-ref-format' --print <refname>
|
|
'git check-ref-format' --branch <branchname-shorthand>
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
Checks if a given 'refname' is acceptable, and exits with a non-zero
|
|
status if it is not.
|
|
|
|
A reference is used in git to specify branches and tags. A
|
|
branch head is stored in the `refs/heads` hierarchy, while
|
|
a tag is stored in the `refs/tags` hierarchy of the ref namespace
|
|
(typically in `$GIT_DIR/refs/heads` and `$GIT_DIR/refs/tags`
|
|
directories or, as entries in file `$GIT_DIR/packed-refs`
|
|
if refs are packed by `git gc`).
|
|
|
|
git imposes the following rules on how references are named:
|
|
|
|
. They can include slash `/` for hierarchical (directory)
|
|
grouping, but no slash-separated component can begin with a
|
|
dot `.`.
|
|
|
|
. They must contain at least one `/`. This enforces the presence of a
|
|
category like `heads/`, `tags/` etc. but the actual names are not
|
|
restricted.
|
|
|
|
. They cannot have two consecutive dots `..` anywhere.
|
|
|
|
. They cannot have ASCII control characters (i.e. bytes whose
|
|
values are lower than \040, or \177 `DEL`), space, tilde `~`,
|
|
caret `{caret}`, colon `:`, question-mark `?`, asterisk `*`,
|
|
or open bracket `[` anywhere.
|
|
|
|
. They cannot end with a slash `/` nor a dot `.`.
|
|
|
|
. They cannot end with the sequence `.lock`.
|
|
|
|
. They cannot contain a sequence `@{`.
|
|
|
|
. They cannot contain a `\`.
|
|
|
|
These rules make it easy for shell script based tools to parse
|
|
reference names, pathname expansion by the shell when a reference name is used
|
|
unquoted (by mistake), and also avoids ambiguities in certain
|
|
reference name expressions (see linkgit:gitrevisions[7]):
|
|
|
|
. A double-dot `..` is often used as in `ref1..ref2`, and in some
|
|
contexts this notation means `{caret}ref1 ref2` (i.e. not in
|
|
`ref1` and in `ref2`).
|
|
|
|
. A tilde `~` and caret `{caret}` are used to introduce the postfix
|
|
'nth parent' and 'peel onion' operation.
|
|
|
|
. A colon `:` is used as in `srcref:dstref` to mean "use srcref\'s
|
|
value and store it in dstref" in fetch and push operations.
|
|
It may also be used to select a specific object such as with
|
|
'git cat-file': "git cat-file blob v1.3.3:refs.c".
|
|
|
|
. at-open-brace `@{` is used as a notation to access a reflog entry.
|
|
|
|
With the `--print` option, if 'refname' is acceptable, it prints the
|
|
canonicalized name of a hypothetical reference with that name. That is,
|
|
it prints 'refname' with any extra `/` characters removed.
|
|
|
|
With the `--branch` option, it expands the ``previous branch syntax''
|
|
`@{-n}`. For example, `@{-1}` is a way to refer the last branch you
|
|
were on. This option should be used by porcelains to accept this
|
|
syntax anywhere a branch name is expected, so they can act as if you
|
|
typed the branch name.
|
|
|
|
EXAMPLES
|
|
--------
|
|
|
|
* Print the name of the previous branch:
|
|
+
|
|
------------
|
|
$ git check-ref-format --branch @{-1}
|
|
------------
|
|
|
|
* Determine the reference name to use for a new branch:
|
|
+
|
|
------------
|
|
$ ref=$(git check-ref-format --print "refs/heads/$newbranch") ||
|
|
die "we do not like '$newbranch' as a branch name."
|
|
------------
|
|
|
|
GIT
|
|
---
|
|
Part of the linkgit:git[1] suite
|