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Date:	Wed, 17 Mar 1993 13:28:23 -0500
From:	rsalz@osf.org
Message-Id: <9303171828.AA06894@earth.osf.org>
To:	ejk@ux2.cso.uiuc.edu, sam-fans@hawkwind.utcs.toronto.edu
Subject: Re:  scripts using 3/12 sam command pipe?

I had a test copy of Boyd's stuff and have been using this for a
while.  Similar but written in rc (uses look and sed).  You'll have
to edit the "sp=" line ...

It is probably just that I haven't been able to really wrap my mind
around structural R.E.'s all that much, but find that I am not using
them all that much.  I use the multi-file aspect all the time; it is
my primary reason for using sam.  As a result, I am often writing little
shell snippets like this:
	for (i in stderr stdout nolog console) {
	    echo 'X/./ ,g/svc_c_' ^ $i ^ '/ {'
	    echo ',x/svc_c_' ^ $i ^ '/ x/svc_c_/ a/route_/'
	    echo '}'
	} >>$h/.sam.rsalz
Actually, I often write those snippets in an "unnamed" window, select
them, and then do ">rc >$sp" where sp is an envvar naming the sam pipe.
	/r$

#! /bin/rc
##  Output a series of commands that will make same go to the tag named on
##  the command line.  If no argument, use the word in the current X
##  selection.  The best way to get the selection is to install xcb; available
##  as contrib/xcb-2.1.tar.Z on export.lcs.mit.edu.

##  Useful variables
~ $#tagspath 0 && tagspath = (. .. /usr/lib/tags)
nl = '
'
tab='	'
cat=()

##  Print usage message and exit.
fn usage {
    echo Usage: $0 '[-o] [-i | tag]' >[1=2]
    exit 1
}

##  Parse flags.
while ( ! ~ $#* 0 ) {
    switch ( $1 ) {
    case -i
	! ~ $#function 0 && usage
	function = `` ($nl) {sed 1q}
    case -o
	cat=cat
    case -*
	usage
    case *
	! ~ $#function 0 && usage
	function = $1
    }
    shift
}

##  Sending to sam?
~ $#cat 0 && {
    ~ $#sp 0 && {
	sp=$home/.sam.$USER
	! ~ $#DISPLAY 0 && sp=$sp.$DISPLAY
    }
    test -r $sp || {
	echo 'No sam fifo' >[1=2]
	usage
    }
    cat='cat >$sp'
}

##  Get the current X selection.
~ $#function 0 && function = `{xcb -p 0}

function = $function ^ $tab

for (dir in $tagspath)
    test -f $dir ^ /tags && {
	line = `` ($nl) { look $function $dir ^ /tags ; echo $status }
	~ $#line 2 && ~ $line(2) 0 && {
	    {
		* = `` ($tab $nl) { echo $line(1) }
		if ( ~ $dir . || ~ $2 /* ) {
		    echo B $2 ^ $nl ^ b $2
		} else {
		    echo B $dir ^ '/' ^ $2 ^ $nl ^ b $dir ^ '/' ^ $2
		}
		shift ; shift
		{
		    echo -n $1
		    while (shift && ! ~ $#* 0)
			echo -n $tab ^ $1
		    echo
		} | sed -e 's/\[/\\[/g' \
			-e 's/[].+?|()*$^]/\\&/g' \
			-e 's/\/\\\^/\/\^/' \
			-e 's/\\\$\/$/\$\//' \
			-e 's/	/	+/g'
	    } | eval $cat
	    exit 0
	}
    }
exit 1