[clue] Piping, xargs, find, grep and such

[Leif]

Here is a general purpose zsh/bash function for doing tasks such as this.

FilesHaving () {
        local command=$1
        shift
        local i
        local output
        for i in $@
        do
                output=`eval $command`
                if [ -n "$output" ]
                then
                        output=`echo $output | sed "s@^@$i: @"`
                        echo $output
                fi
        done
}

Most often I use it for finding symbols in libraries.

FilesHaving 'nm $i | grep strftime' /usr/lib/*.a 2> /dev/null

Some trickery is needed where find/xargs is required.

-Leif

On 09/16/2012 09:07 PM, David L. Anselmi wrote:
> jacob wrote:
>> puts "#{ARGF.filename}:#{output}" if output =~ /pattern/
> Yeah, when you're dealing with something modern like Perl or Ruby it may not make sense to do work 
> in external programs.  They handle command line args easily and do pattern matching as well and as 
> simply as grep.
>
> So you have to decide whether Jacob's suggestion is more elegant than the ones I suggested, which 
> will depend on whether it's more useful to adapt your output to work with grep or to add flexibility 
> to work either way.
>
> Dave
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