[gentoo-dev] Time-and-bandwidth-saving script

[Timo Lindemann]

Hi,

first, sorry, no, I am not a dev, but wanted to show you a little 
(actually kind of trivial) script I wrote last night. The reason I didnt 
do it earlier is it just didnt come up my mind.

emerge sync takes longer and longer to complete just because of the 
sheer number of files. Then I saw the RSYNC_EXCLUDEFROM variable, and 
had this idea.

The script calculates the rsync_excludes' file's possible contents 
automatically, I even went into the effort to comment it.

---
#!/bin/bash
#
# This script brought to you by Timo Lindemann aka anykey in 2004
#
# This script calculates an excludefile for portage
# based on all software you never installed. It excludes
# only main branches of the tree.
# To use it, you just uncomment the RSYNC_EXCLUDEFROM line
# in /etc/make.conf and invoke the script as follows:
#
# getexcludes >/etc/portage/rsync_excludes
#
# Now, we filter what we have...
INSTALLED=`qpkg -nc -I|sed -e "s/\ \*//g;s/\/.*//g"|sort -d|uniq`
# ...from all that portage offers...
AVAILABLE=`ls -d /usr/portage/* | sed "s:/usr/portage/::g;/\./d"|grep -e 
"\w.*\-.*"`
# ...using a for loop and substitution. Works.
for i in ${INSTALLED}
do
         AVAILABLE=${AVAILABLE//${i}}
done;
# Then we print that list, or redirect it.
for i in ${AVAILABLE}
do
echo "/${i}/"
done;
---

If this is unwanted, please ignore it. If it is too simple, laugh at it. 
But I thought it actually is useful (at least for me).

Regards
-- 
Timo Lindemann

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