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[Dufflebunk <dufflebunk AT dufflebunk.homeip.net>]

I've written a script to help with spell updates. Examples:
update_spell.sh -version 1.0b4 -updated -md5
$GRIMOIRE/devel/gcvs/DETAILS
Will update the VERSION field, update the UPDATED field, and download
and uncompress (but not untar) the archive, do an md5sum, and update the
MD5 field.

As always, for themost up to date version, check my web site
http://dufflebunk.homeip.net/~dufflebunk/sorcerer


-- 


Quidquid latine dictum sit, altum sonatur. 
-----------------
PGP public key at
http://wwwkeys.ch.pgp.net:11371/pks/lookup?op=get&search=0x92B5D3F1

#!/bin/bash

function usage()
{
cat << EOF
syntax: update_spell.sh [ option ] file
    ARGs:
    -version <new-version>	new version
    -updated                    update UPDATE field
    -md5                        download and update MD5 field
EOF
}

function args()
{

	let i=0
	while [ $# -gt 1 ] ; do
		case $1 in
			-version) NEW_VERSION=$2
				let i+=2
				shift 2
				;;
			-updated)  NEW_UPDATED=`date +%Y%m%d`
				let i+=1
				shift 1
				;;
			-md5)	wget --passive-ftp -O /tmp/update_spell.dl.$$.tmp $URL &&
				COMPRESSOR=`guess_compressor /tmp/update_spell.dl.$$.tmp` &&
				NEW_MD5=`uncompress /tmp/update_spell.dl.$$.tmp $COMPRESSOR \
					| md5sum | awk '{print $1;}'`
				rm /tmp/update_spell.dl.$$.tmp
				let i+=1
				shift 1
				;;
			*)	usage
				exit 1
		esac
	
	done
	return $i
}

#---------------------------------------------------------------------
#=item guess_compressor
##
## Guesses what program was used to compress a file
##
## Takes one arg, the file to guess about.
##
#---------------------------------------------------------------------
guess_compressor()  {

  echo  "Running guess_compressor() on $1"  >>  $DEBUG
  COMPRESSOR=`$FILEPROG  -b  $1  |  cut  -d ' '  -f1`
  if [  "$COMPRESSOR"  =  "GNU"  ] ;  then  
    COMPRESSOR=`$FILEPROG  -b  $1  |  cut  -d ' '  -f2` 
  fi
  echo  "Compressor guessed to be $COMPRESSOR"  >>  $DEBUG  &&
 
  echo $COMPRESSOR
  
}

#---------------------------------------------------------------------
#=item uncompress
##
## Just uncompresses the file, but does not expand it. i.e. bunzip
## it, but don't untar it. It dumps the expanded file to stdout.
##
## Takes two args, filename in,  and compressor.
##
#---------------------------------------------------------------------
uncompress() {

  case  $2  in
        bzip2)  bzip2  -cdf   $1  >&1 ;;
         gzip)  gzip   -cdf   $1  >&1 ;;
    compress*)  gzip   -cdf   $1  >&1 ;;
          Zip)  echo          $1  >&1 ;;
          RPM)  rpmunpack  <  $1  |  gzip  -d    \
	                          >&1 ;;
          tar)  echo          $1  >&1 ;;
            *)  false                 ;;
  esac

}

NEW_VERSION=""
NEW_UPDATED=""
NEW_MD5=""
DETAILS=${!#}
. /etc/sorcery/config
. $DETAILS > /dev/null
URL=${SOURCE_URL[0]}
args $*
shift $?

[[ $DETAILS ]] || ( usage ; exit 1 )
SED="sed"
[[ $NEW_VERSION ]] && SED="$SED -e s/^\([[:blank:]]*VERSION=\).*$/\1"$NEW_VERSION"/"
[[ $NEW_UPDATED ]] && SED="$SED -e s/^\([[:blank:]]*UPDATED=\).*$/\1"$NEW_UPDATED"/"
[[ $NEW_MD5 ]] && SED="$SED -e s/^\([[:blank:]]*MD5=\).*$/\1\""$NEW_MD5"\"/"

echo $NEW_VERSION, $NEW_UPDATED, $NEW_MD5
echo $SED

NEW_DETAILS=`$SED $DETAILS`
EQ_COL=`echo "$NEW_DETAILS" | head -n 1 | awk -F '=' '{ print length($1) ;}'`
if ! echo "$NEW_DETAILS" | grep -q "[[:blank:]]*VERSION=" ; then
	let NUM_SPACES=$EQ_COL-8
	
	NEW_DETAILS="$NEW_DETAILS"$'\n'
	for (( i=0 ; i<$NUM_SPACES; i++ )) ; do
		NEW_DETAILS="$NEW_DETAILS "
	done
	NEW_DETAILS="${NEW_DETAILS}VERSION=$NEW_VERSION"
	
fi

if ! echo "$NEW_DETAILS" | grep -q "[[:blank:]]*UPDATED=" ; then
	let NUM_SPACES=$EQ_COL-8
	
	NEW_DETAILS="$NEW_DETAILS"$'\n'
	for (( i=0 ; i<$NUM_SPACES ; i++ )) ; do
		NEW_DETAILS="$NEW_DETAILS "
	done
	NEW_DETAILS="${NEW_DETAILS}UPDATED=$NEW_UPDATED"
	
fi

if ! echo "$NEW_DETAILS" | grep -q "[[:blank:]]*MD5=" ; then
	let NUM_SPACES=$EQ_COL-4
echo "spaces=$NUM_SPACES"
	
	NEW_DETAILS="$NEW_DETAILS"$'\n'
	for (( i=0 ; i<$NUM_SPACES ; i++ )) ; do
		NEW_DETAILS="$NEW_DETAILS "
	done
	NEW_DETAILS="${NEW_DETAILS}MD5=\"$NEW_MD5\""
	
fi

echo "$NEW_DETAILS"

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