[patch] Vastly improved sources() function

[Simon Brenner]

I found that AUTOPRUNE took a *very* long time to complete on my 
computer (P2 450), something like hours... (I rarely let it complete the 
AUTOPRUNE)

So I looked into the workings of the prune command, and found that the 
subroutine taking up the most time was the sources() function in 
sources.lunar.

I took the sources() function, and asked myself what could be taking it 
so much time. Not very hard to find out, the problem was the two uses of 
sed to replace references to $SOURCE0 into $SOURCE (The first source in 
the DETAILS file is not indexed). Two calls to `sed s/SOURCE0/SOURCE/` 
per source variable processed.

So, to eliminate the sed calls, I removed the sed calls and added one 
line before the source variables are looped through:
SOURCE0=$SOURCE
, thereby eliminating the need to translate $SOURCE0 into $SOURCE

I tested it (no fancy timing or anything, just thumbs measure), and 
found it roughly 10 times faster (serious!). A lunar prune completed in 
a couple of minutes, instead of an hour

Well... Just apply the patch =) Not that I am a master at the inner 
workings of lunar, but I can see no bugs caused by this modification...

I hope I made the world a slightly better place now =)

// Simon Brenner
-------------- next part --------------
*** sources.lunar	Wed Apr 16 21:47:09 2003
--- /home/salparot/sources.lunar	Mon May 12 16:18:33 2003
***************
*** 26,34 ****
  
    run_details $1 || return 1
  
    if [ -z "$CVS_MODULE" ]; then
      for (( CNT=0; CNT<=$MAX_SOURCES; CNT++ )) ; do
!       TEMP1=`echo SOURCE$CNT | sed s/SOURCE0/SOURCE/`
        TEMP2=`echo SOURCE$(( CNT+1))`
        TEMP3=`echo SOURCE$(( CNT+2))`
  
--- 26,36 ----
  
    run_details $1 || return 1
  
+   SOURCE0=$SOURCE
+ 
    if [ -z "$CVS_MODULE" ]; then
      for (( CNT=0; CNT<=$MAX_SOURCES; CNT++ )) ; do
!       TEMP1=`echo SOURCE$CNT`
        TEMP2=`echo SOURCE$(( CNT+1))`
        TEMP3=`echo SOURCE$(( CNT+2))`
  
***************
*** 50,56 ****
        #lets clear the array
          for (( CNT1=0; CNT1<=$CNT; CNT1++ ))
          do
!           TEMP1=`echo SOURCE$CNT1 | sed s/SOURCE0/SOURCE/`
            unset $TEMP1
          done   
          break
--- 52,58 ----
        #lets clear the array
          for (( CNT1=0; CNT1<=$CNT; CNT1++ ))
          do
!           TEMP1=`echo SOURCE$CNT1`
            unset $TEMP1
          done   
          break