>> I can't seem to get awk to work.
>> Here is the command line I'm trying to use:
>>
>> svn ls -R | awk "print $1"
>
> Try:
>
> svn ls -R | awk "{print $1}"
>
> The default rule must be enclosed in braces.
Actually, this is not strictly so; while your suggested remedy
is correct in this instance, your explanation is wrong.
An awk "rule", (usually called a "statement", for it is a part
of an awk "script" which itself comprises one or more of such
statements), comprises two parts:
match-criterion { action [; ...] }
It's the *action* part of the statement which must be enclosed
in braces, and this applies to *all* statements; (in fact, if any
statement is given at all, there is no applicable concept of a
"default"; any statement may omit either the match-criterion part,
which then defaults to matching *every* input line, or it may omit
the action part, which then defaults to echoing the entire matched
input line to the output stream.
The only way to get a "default rule" would be to not specify any
script at all; in that case, the entire awk invocation would become
rather pointless, for the "default script" simply echoes the entire
input stream to the output. (And because such a "default script"
would be rather pointless, the awk command itself *requires* a
script to be specified, either directly on the command line, or
from a file specified by the `-f' option).
--
Regards,
Keith.
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