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Diffstat (limited to 'Documentation/git-check-ref-format.txt')
| -rw-r--r-- | Documentation/git-check-ref-format.txt | 40 |
1 files changed, 26 insertions, 14 deletions
diff --git a/Documentation/git-check-ref-format.txt b/Documentation/git-check-ref-format.txt index fc02959ba4..d9de992585 100644 --- a/Documentation/git-check-ref-format.txt +++ b/Documentation/git-check-ref-format.txt @@ -60,7 +60,7 @@ Git imposes the following rules on how references are named: 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 +unquoted (by mistake), and also avoid ambiguities in certain reference name expressions (see linkgit:gitrevisions[7]): . A double-dot `..` is often used as in `ref1..ref2`, and in some @@ -77,11 +77,23 @@ reference name expressions (see linkgit:gitrevisions[7]): . at-open-brace `@{` is used as a notation to access a reflog entry. -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. +With the `--branch` option, the command takes a name and checks if +it can be used as a valid branch name (e.g. when creating a new +branch). But be cautious when using the +previous checkout syntax that may refer to a detached HEAD state. +The rule `git check-ref-format --branch $name` implements +may be stricter than what `git check-ref-format refs/heads/$name` +says (e.g. a dash may appear at the beginning of a ref component, +but it is explicitly forbidden at the beginning of a branch name). +When run with `--branch` option in a repository, the input is first +expanded for the ``previous checkout syntax'' +`@{-n}`. For example, `@{-1}` is a way to refer the last thing that +was checked out using "git checkout" operation. 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. As an +exception note that, the ``previous checkout operation'' might result +in a commit object name when the N-th last thing checked out was not +a branch. OPTIONS ------- @@ -94,22 +106,22 @@ OPTIONS Interpret <refname> as a reference name pattern for a refspec (as used with remote repositories). If this option is enabled, <refname> is allowed to contain a single `*` - in place of a one full pathname component (e.g., - `foo/*/bar` but not `foo/bar*`). + in the refspec (e.g., `foo/bar*/baz` or `foo/bar*baz/` + but not `foo/bar*/baz*`). --normalize:: Normalize 'refname' by removing any leading slash (`/`) characters and collapsing runs of adjacent slashes between - name components into a single slash. Iff the normalized + name components into a single slash. If the normalized refname is valid then print it to standard output and exit - with a status of 0. (`--print` is a deprecated way to spell - `--normalize`.) + with a status of 0, otherwise exit with a non-zero status. + (`--print` is a deprecated way to spell `--normalize`.) EXAMPLES -------- -* Print the name of the previous branch: +* Print the name of the previous thing checked out: + ------------ $ git check-ref-format --branch @{-1} @@ -118,8 +130,8 @@ $ git check-ref-format --branch @{-1} * Determine the reference name to use for a new branch: + ------------ -$ ref=$(git check-ref-format --normalize "refs/heads/$newbranch") || -die "we do not like '$newbranch' as a branch name." +$ ref=$(git check-ref-format --normalize "refs/heads/$newbranch")|| +{ echo "we do not like '$newbranch' as a branch name." >&2 ; exit 1 ; } ------------ GIT |