Re: OT:cscope/tags

[Perry Smith <pedz@easesoftware.com>]

On Dec 5, 2006, at 4:39 PM, Hadron Quark wrote:

> Perry Smith <pedz@easesoftware.com> writes:
>
>> cscope.  To make the db I use -q.  To invoke it via emacs, I use -q
>> and -d:
>>
>>        -d     Do not update the cross-reference.
>>
>>        -q     Enable  fast  symbol  lookup  via an inverted
>
> Just for thread completeness, how do you add these options when  
> inviking
> cscope from emacs? How are you accessing cscope from emacs? Which el
> package do you use?

Well, its a long story.  I created my own cscope.el back in 1990.   
I'm happy to share it
but it has lots of weird twisted gunk in it.  I have the concept of  
an "inherited buffer".  Each
buffer has a buffer local variable that points back to its inherited  
buffer.  In this way,
different buffers can use different cscope's and not get confused  
between them.  At the
time, there was a lot of other things that were inherited besides  
just the cscope information
(like build information and that sort of thing).

I also have a script called cscope-front (I've appended it to the  
bottom).  I doubt if it
will do you much good either except just as a thought of calling  
cscope via a script
and then that script can add and subtract arguments based upon a  
number of
variables.  This keeps the lisp code simpler -- I was more  
comfortable writing shell
scripts than lisp code at the time.

I create the cscope database via make.  The makefile creates a list  
of files called cscope.files,
(usually based upon various make variables), then it calls cscope as:

cscope -q -b

(The cscope I'm using defaults to looking in cscope.files for the  
list of files.)

 From emacs, I call cscope-front (using my cscope.el routines).  As  
you can see, the script
has debug output to /tmp/doggy.  Here are some sample lines from doggy:

/home/pedz/Eclipse/SATA/src
a='' p='/home/pedz/Eclipse/SATA/src'
/usr/local/bin/cscope -d -q -l -P /home/pedz/Eclipse/SATA/src -f  
cscope.out

The last line is all the args I use to call cscope with.

Hopefully, something in here will be useful to you.

#!/usr/local/bin/bash
#
# First arg is the string to pass to setup, second arg is the
# directory where the cscope should behave from
#
a=$1
p=$( echo $2 | sed -e 's%/$%%' )
CSCOPE=/usr/local/bin/cscope

shift
shift

/bin/pwd >>  /tmp/doggy
echo "a='$a' p='$p'" >> /tmp/doggy
if [ -n "$a" ] ; then
   source ~/.setup $a
fi
#
# DFS permissions are weird and I can execute things even though the
# file system says I can not.  So I only check to see if the file
# exists or not.
#
if [ -e cscope/bin/cscope ] ; then
   CSCOPE=cscope/bin/cscope
elif [ -e ../cscope/bin/cscope ] ; then
   CSCOPE=../cscope/bin/cscope
elif [ -e ../../cscope/bin/cscope ] ; then
   CSCOPE=../../cscope/bin/cscope
fi

echo $CSCOPE -d -q -l -P "$p" "$@" >> /tmp/doggy
exec $CSCOPE -d -q -l -P "$p" "$@" 2>>/tmp/doggy
# echo $CSCOPE -q -l -P "'$p'" "$@" >> /tmp/doggy
# exec $CSCOPE -q -l -P "'$p'" "$@" 2>> /tmp/doggy
# echo $CSCOPE -q -l >> /tmp/doggy
# $CSCOPE -q -l 2>> /tmp/doggy

# /afs/austin/aix/project/aix41C/cscope/bin/cscope -d -q -l \
#	-f /afs/austin/aix/project/aix41C/cscope/bos.db
#
#	-P /afs/austin/aix/project/aix41C/build/base