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-rw-r--r--Documentation/git-check-ref-format.txt15
1 files changed, 12 insertions, 3 deletions
diff --git a/Documentation/git-check-ref-format.txt b/Documentation/git-check-ref-format.txt
index c1ce26884e..e9b3b40af4 100644
--- a/Documentation/git-check-ref-format.txt
+++ b/Documentation/git-check-ref-format.txt
@@ -9,7 +9,7 @@ SYNOPSIS
--------
[verse]
'git check-ref-format' <refname>
-'git check-ref-format' [--branch] <branchname-shorthand>
+'git check-ref-format' --branch <branchname-shorthand>
DESCRIPTION
-----------
@@ -25,6 +25,10 @@ imposes the following rules on how references are named:
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
@@ -38,6 +42,8 @@ imposes the following rules on how references are named:
. 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
@@ -57,8 +63,11 @@ reference name expressions (see linkgit:git-rev-parse[1]):
. at-open-brace `@{` is used as a notation to access a reflog entry.
-With the `--branch` option, it expands a branch name shorthand and
-prints the name of the branch the shorthand refers to.
+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.
EXAMPLE
-------