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95 lines
3.0 KiB
95 lines
3.0 KiB
git-check-ref-format(1) |
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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' <refname> |
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'git check-ref-format' --print <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 under the `$GIT_DIR/refs/heads` directory, and |
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a tag is stored under the `$GIT_DIR/refs/tags` directory. git |
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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 `.`. |
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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. |
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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 `{caret}`, colon `:`, question-mark `?`, asterisk `*`, |
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or open bracket `[` anywhere. |
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. They cannot end with a slash `/` nor a dot `.`. |
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. They cannot end with the sequence `.lock`. |
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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:git-rev-parse[1]): |
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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 `{caret}ref1 ref2` (i.e. not in |
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`ref1` and in `ref2`). |
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. A tilde `~` and caret `{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 `--print` option, if 'refname' is acceptable, it prints the |
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canonicalized name of a hypothetical reference with that name. That is, |
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it prints 'refname' with any extra `/` characters removed. |
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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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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=$(git check-ref-format --print "refs/heads/$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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