mirror of
https://github.com/git/git.git
synced 2024-11-13 20:53:02 +01:00
2c2b6646c2
This reverts commit cdfd94837b, as it
does not just apply to "@" (and forms with modifiers like @{u}
applied to it), but also affects e.g. "refs/heads/@/foo", which it
shouldn't.
The basic idea of giving a short-hand might be good, and the topic
can be retried later, but let's revert to avoid affecting existing
use cases for now for the upcoming release.
125 lines
4.1 KiB
Text
125 lines
4.1 KiB
Text
git-check-ref-format(1)
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=======================
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NAME
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----
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git-check-ref-format - Ensures that a reference name is well formed
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SYNOPSIS
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--------
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[verse]
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'git check-ref-format' [--normalize]
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[--[no-]allow-onelevel] [--refspec-pattern]
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<refname>
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'git check-ref-format' --branch <branchname-shorthand>
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DESCRIPTION
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-----------
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Checks if a given 'refname' is acceptable, and exits with a non-zero
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status if it is not.
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A reference is used in Git to specify branches and tags. A
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branch head is stored in the `refs/heads` hierarchy, while
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a tag is stored in the `refs/tags` hierarchy of the ref namespace
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(typically in `$GIT_DIR/refs/heads` and `$GIT_DIR/refs/tags`
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directories or, as entries in file `$GIT_DIR/packed-refs`
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if refs are packed by `git gc`).
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Git imposes the following rules on how references are named:
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. They can include slash `/` for hierarchical (directory)
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grouping, but no slash-separated component can begin with a
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dot `.` or end with the sequence `.lock`.
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. They must contain at least one `/`. This enforces the presence of a
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category like `heads/`, `tags/` etc. but the actual names are not
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restricted. If the `--allow-onelevel` option is used, this rule
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is waived.
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. They cannot have two consecutive dots `..` anywhere.
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. They cannot have ASCII control characters (i.e. bytes whose
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values are lower than \040, or \177 `DEL`), space, tilde `~`,
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caret `^`, or colon `:` anywhere.
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. They cannot have question-mark `?`, asterisk `*`, or open
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bracket `[` anywhere. See the `--refspec-pattern` option below for
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an exception to this rule.
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. They cannot begin or end with a slash `/` or contain multiple
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consecutive slashes (see the `--normalize` option below for an
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exception to this rule)
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. They cannot end with a dot `.`.
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. They cannot contain a sequence `@{`.
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. They cannot contain a `\`.
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These rules make it easy for shell script based tools to parse
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reference names, pathname expansion by the shell when a reference name is used
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unquoted (by mistake), and also avoids ambiguities in certain
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reference name expressions (see linkgit:gitrevisions[7]):
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. A double-dot `..` is often used as in `ref1..ref2`, and in some
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contexts this notation means `^ref1 ref2` (i.e. not in
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`ref1` and in `ref2`).
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. A tilde `~` and caret `^` are used to introduce the postfix
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'nth parent' and 'peel onion' operation.
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. A colon `:` is used as in `srcref:dstref` to mean "use srcref\'s
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value and store it in dstref" in fetch and push operations.
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It may also be used to select a specific object such as with
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'git cat-file': "git cat-file blob v1.3.3:refs.c".
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. at-open-brace `@{` is used as a notation to access a reflog entry.
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With the `--branch` option, it expands the ``previous branch syntax''
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`@{-n}`. For example, `@{-1}` is a way to refer the last branch you
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were on. This option should be used by porcelains to accept this
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syntax anywhere a branch name is expected, so they can act as if you
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typed the branch name.
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OPTIONS
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-------
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--[no-]allow-onelevel::
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Controls whether one-level refnames are accepted (i.e.,
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refnames that do not contain multiple `/`-separated
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components). The default is `--no-allow-onelevel`.
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--refspec-pattern::
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Interpret <refname> as a reference name pattern for a refspec
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(as used with remote repositories). If this option is
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enabled, <refname> is allowed to contain a single `*`
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in place of a one full pathname component (e.g.,
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`foo/*/bar` but not `foo/bar*`).
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--normalize::
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Normalize 'refname' by removing any leading slash (`/`)
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characters and collapsing runs of adjacent slashes between
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name components into a single slash. Iff the normalized
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refname is valid then print it to standard output and exit
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with a status of 0. (`--print` is a deprecated way to spell
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`--normalize`.)
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EXAMPLES
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--------
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* Print the name of the previous branch:
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+
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------------
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$ git check-ref-format --branch @{-1}
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------------
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* Determine the reference name to use for a new branch:
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+
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------------
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$ ref=$(git check-ref-format --normalize "refs/heads/$newbranch") ||
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die "we do not like '$newbranch' as a branch name."
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------------
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GIT
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---
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Part of the linkgit:git[1] suite
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