1 git-check-ref-format(1)
2 =======================
6 git-check-ref-format - Make sure ref name is well formed
10 'git check-ref-format' <refname>
14 Checks if a given 'refname' is acceptable, and exits non-zero if
17 A reference is used in git to specify branches and tags. A
18 branch head is stored under `$GIT_DIR/refs/heads` directory, and
19 a tag is stored under `$GIT_DIR/refs/tags` directory. git
20 imposes the following rules on how refs are named:
22 . It can include slash `/` for hierarchical (directory)
23 grouping, but no slash-separated component can begin with a
26 . It cannot have two consecutive dots `..` anywhere;
28 . It cannot have ASCII control character (i.e. bytes whose
29 values are lower than \040, or \177 `DEL`), space, tilde `~`,
30 caret `{caret}`, colon `:`, question-mark `?`, asterisk `*`,
31 or open bracket `[` anywhere;
33 . It cannot end with a slash `/`.
35 These rules makes it easy for shell script based tools to parse
36 refnames, pathname expansion by the shell when a refname is used
37 unquoted (by mistake), and also avoids ambiguities in certain
38 refname expressions (see linkgit:git-rev-parse[1]). Namely:
40 . double-dot `..` are often used as in `ref1..ref2`, and in some
41 context this notation means `{caret}ref1 ref2` (i.e. not in
44 . tilde `~` and caret `{caret}` are used to introduce postfix
45 'nth parent' and 'peel onion' operation.
47 . colon `:` is used as in `srcref:dstref` to mean "use srcref\'s
48 value and store it in dstref" in fetch and push operations.
49 It may also be used to select a specific object such as with
50 'git-cat-file': "git cat-file blob v1.3.3:refs.c".
55 Part of the linkgit:git[1] suite