space vs tab

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I am using ifile in a "crazy style" auto-filter arrangement on my 
courier imap server (with procmail).  I have folders with spaces in 
their name, and currently do some odd substitution tricks to get it changed.

Attached is my procmailrc and my ifile.sh "autolearn" file which runs 
once every 15 minutes from cron.  Any suggestions on de-crazifying this 
would be helpful as well.



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#!/bin/bash
IFS="
"
for mail in $(find /home/batkiwi/Maildir -cmin -15 -path '*cur*' -type f | grep -v 'Trash' | grep -v 'Sent' | grep -v 'Spam' )
do
	if [ -f $mail ]
	then

	folder=`echo $mail | sed 's/.*Maildir\/\(.*\)\/.*/\1/'`
	if [ "$folder" = "cur" ]
	then
		folder="INBOX"
	else
		folder=`echo $folder | sed 's/\.\(.*\)\/cur/\1/' | sed 's/ /:/g'`
	fi

	oldfolder=`cat "$mail" | formail -z -x X-IFile-Guess | sed 's/ /:/g'`
	subject=`cat "$mail" | formail -z -x Subject`
	if [ "$oldfolder" = "$folder" ]
	then
		#echo "$oldfolder already correct for $subject"
		blah="blah"
	elif [ "$oldfolder" = "" ]
	then
		echo "old folder empty, new folder $folder for $subject"
		grep -E "^[-[:alnum:]]*: " "$mail" | /home/batkiwi/ifile -i "$folder"
	else
		echo "$oldfolder to $folder for $subject"
		grep -E "^[-[:alnum:]]*: " "$mail" | /home/batkiwi/ifile -d "$oldfolder" -i "$folder"
	fi

	fi
done

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 filename=".procmailrc"

#Preliminaries
SHELL=/bin/sh               #Use the Bourne shell (check your path!)
MAILDIR=${HOME}/Maildir/            #First check what your mail directory is!
DEFAULT=${MAILDIR}
LOGFILE=${MAILDIR}/procmail.log
LOG="--- Logging ${LOGFILE} for ${LOGNAME}, "
IFILE=/home/batkiwi/ifile

#pass to spamc
:0fw
| spamc

#test ifile
:0wh
IFILECAT=| ${IFILE} -c -q 

#IFILECAT=| grep -E "^[-[:alnum:]]*: " | ${IFILE} -c -q
IFILECAT=`/bin/echo ${IFILECAT} | /bin/sed 's/:/ /g'`

:0fw
| formail -A "X-IFile-Guess: ${IFILECAT}"

IFILECAT=`/bin/echo ${IFILECAT} | /bin/sed 's/ /\\ /g'`

#get rid of hella-spam, 8 or more stars
:0:
* ^X-Spam-Level: \*\*\*\*\*\*\*\*
/dev/null

#filter out me spam, mateys!
:0:
* ^X-Spam-Flag:.*YES
.Trash/

:0:
* ^X-IFile-Guess: INBOX
${MAILDIR}

:0:
".${IFILECAT}/"

# Accept all the rest to your default mailbox
# should never hit this one
:0:
${MAILDIR}

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