Re: [RFC-PATCHv6 4/4] pathspec: allow querying for attributes

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Stefan Beller <sbeller@xxxxxxxxxx> writes:

>> Then while parsing ":(attr:VAR1=VAL1 -VAR2 VAR3...)path/to/dir/",
>
> This syntax is not pleasant to parse IMHO as it is not clear if the token
> after white space (-VAR2 here) is another attribute or the next part of
> the list of VAR1, ...

Remove the ambiguity by declaring that the list is always whitespace
separated.  No whitespace in var, no whitespace in val, no quoting.

The set of attributes with values expected to be used in the
pathspec "attribute match" magic, I do not think there is anything
that wants such a random arbitrary string.  The value side of an
attribute with value, e.g. "eol=crlf", "conflict-marker-size=7", is
designed to be a token that our C code is prepared to parse.

In other words, if you match the parsing semantics of parse_attr()
in attr.c, you are OK.  The attribute subsystem will not give users
anything that is more complex than what that routine is prepared to
parse, and that is a "whitespace separated list, no whitespace in
attribute names, no whitespace in values, no quoting".

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