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glenc
n00b
Joined: 24 Jun 2002
Posts: 13
Location: Syd, Oz
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 Posted: Sat Jun 29, 2002 12:17 pm Post subject: i've written a script to handle /etc config merges |
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Hi,
I've been using Gentoo for about a week and I got sick of manually merging configs in the /etc tree after every `emerge -u`, so I wrote a script that does some of the legwork for you.
Called with no args, it prints a list of all the configs that need merging.
Called with a ._cfgXXXX_cfgfile file as an arg, it prints the `diff`s between that file and the one it intends to replace, prints the two files side-by-side using `pr` for comparison, and then asks the user whether to rm the ._cfgXXXX file, mv the ._cfgXXXX file over the existing one, or do nothing.
It makes those config updates much less of a pain in the arse. The code is posted below if anyone is interested, apologies for it's general arsy-ness, it's very much a quick hack job, but it works  If the Gentoo maintainers think it's worthwhile and want to merge it into Gentoo, I'll write code that allows the merging of the lines which `diff`er from one file to the other.
| Code: |
#!/bin/bash
# source the gentoo colours
. /etc/init.d/functions.sh
case $# in
0)
echo "${WARN}Configs in need of update:${NORMAL}"
find /etc -name '._cfg*'
exit
;;
1)
NEWCFG=$1
;;
*)
echo "${BAD}Usage: ${NORMAL}$0 [new-config-file]"
exit
;;
esac
WIDTH=$[`tput cols`/2*2] # force output width to be even
HALFWIDTH=$[$WIDTH/2-1]
[ ! -f $NEWCFG ] && { echo "${BAD}$NEWCFG: file not found${NORMAL}"; exit; }
OLDCFG=`echo $NEWCFG | perl -ne "s/\._cfg\d{4}_//; print;"`
horzline() {
for i in `seq $HALFWIDTH`; do echo -n -; done
echo -n +
for i in `seq $HALFWIDTH`; do echo -n -; done
echo
}
if cmp -s $OLDCFG $NEWCFG;then
echo ${GOOD} $OLDCFG is identical to $NEWCFG
else
echo "${WARN}*** ${GOOD}diff output ${WARN}***${NORMAL}"
diff $OLDCFG $NEWCFG
echo
echo "${WARN}*** ${GOOD}actual file contents ${WARN}***${NORMAL}"
horzline
printf "%-${HALFWIDTH}s|%-${HALFWIDTH}s\n" $OLDCFG $NEWCFG
horzline
pr -w$WIDTH -m -t -s'|' $OLDCFG $NEWCFG
horzline
fi
echo -n "[c]lobber old file, [i]gnore new file, or do [n]othing? "
read CHOICE
case $CHOICE in
c) mv $NEWCFG $OLDCFG ;;
i) rm $NEWCFG ;;
n) ;;
*) echo "Invalid choice: $CHOICE ... bailing out!"; exit 1; ;;
esac
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d4h0od
Tux's lil' helper
Joined: 27 Jun 2002
Posts: 80
Location: Europe => Sweden => Blekinge => Karlskrona => h0odet
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| Posted: Sat Jun 29, 2002 1:10 pm Post subject: tnx |
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just wanted to say thanx for the script... ive been using gentoo for a week too and i just sat and wondered if there was any program/script that could help one with updating config files
_________________
// d4h0od |
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glenc
n00b
Joined: 24 Jun 2002
Posts: 13
Location: Syd, Oz
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| Posted: Sat Jun 29, 2002 1:21 pm Post subject: |
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Thanks ... it's nice to know that my late night sleep deprivation code is making someone's life easier
On an aside, you'll notice the script has a completely unnecessary dependence on Perl, because I like Perl regex's and I hate the nuances of sed's regex handling Also, the script only works for the /etc tree at the moment, not the entire $CONFIG_MASK set, although that's about a 10 second fix when I can be bothered |
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Damasz
Tux's lil' helper
Joined: 24 Apr 2002
Posts: 91
Location: Groningen, the Netherlands
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| Posted: Sat Jun 29, 2002 2:35 pm Post subject: |
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Did you know about the etc-update script from the gentoolkit package?
Try it out! |
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glenc
n00b
Joined: 24 Jun 2002
Posts: 13
Location: Syd, Oz
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| Posted: Sat Jun 29, 2002 2:52 pm Post subject: |
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Ahh thanks ... haven't checked the source yet but it seems to be substantially more fully fledged than my script
Also, shouldn't gentoolkit stop providing /usr/sbin/epm, since the epm package itself provides /usr/bin/epm and this could lead to confusion ... |
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