Re: [PATCH] Disallow '\' in ref names

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Robin Rosenberg venit, vidit, dixit 08.05.2009 07:32:
> This is asking for trouble since '\' is a directory separator in
> Windows and thus may produce unpredictable results.
> 
> Signed-off-by: Robin Rosenberg <robin.rosenberg@xxxxxxxxxx>
> ---
>  Documentation/git-check-ref-format.txt |    2 ++
>  refs.c                                 |    3 ++-
>  2 files changed, 4 insertions(+), 1 deletions(-)
> 
> diff --git a/Documentation/git-check-ref-format.txt b/Documentation/git-check-ref-format.txt
> index c1ce268..4884520 100644
> --- a/Documentation/git-check-ref-format.txt
> +++ b/Documentation/git-check-ref-format.txt
> @@ -38,6 +38,8 @@ imposes the following rules on how references are named:
>  
>  . They cannot contain a sequence `@{`.
>  
> +- They cannot contain a `\\`

Minor nit from the doc watch dog:

+. 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
> diff --git a/refs.c b/refs.c
> index e65a3b4..fc33bc6 100644
> --- a/refs.c
> +++ b/refs.c
> @@ -682,12 +682,13 @@ int for_each_rawref(each_ref_fn fn, void *cb_data)
>   * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or
>   * - it ends with a "/".
>   * - it ends with ".lock"
> + * - it contains a "\" (backslash)
>   */
>  
>  static inline int bad_ref_char(int ch)
>  {
>  	if (((unsigned) ch) <= ' ' ||
> -	    ch == '~' || ch == '^' || ch == ':')
> +	    ch == '~' || ch == '^' || ch == ':' || ch == '\\')
>  		return 1;
>  	/* 2.13 Pattern Matching Notation */
>  	if (ch == '?' || ch == '[') /* Unsupported */

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