Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!ginosko!uunet!mcsun!hp4nl!star.cs.vu.nl!ast@cs.vu.nl
From: ast@cs.vu.nl (Andy Tanenbaum)
Newsgroups: comp.os.minix
Subject: makepost
Message-ID: <3493@ast.cs.vu.nl>
Date: 4 Oct 89 21:57:30 GMT
Sender: ast@cs.vu.nl
Reply-To: ast@cs.vu.nl (Andy Tanenbaum)
Organization: VU Informatica, Amsterdam
Lines: 115

I am starting to think about making the 1.4b posting.  Not that I am ready
to do it, just think about it.  To minimize the chance of my screwing up,
I am trying to get the computer to help.  Basically, I have two trees on
my Sun, .../minix/tape3 and .../minix/tape4.  I wrote a shell script to
take two corresponding directories, and compare all the files in the new
directory to the old one.  Files that are brand new are copied to a
scratch directory. Files that are modified have their cdif copied to the
scratch directory (unless the new file is smaller than the cdif).  Then
the .cdif files are catted to something.cdif.  This and the new files are
shar'ed, compressed and uuencoded.  This monster is then split
into mail-size chunks and copied to my posting directory, with cut lines
appended automatically top and bottom to each chunk.

When you receive this stuff, you will see things like:
  commands.xaa  commands.xab   commands.xac

The idea is that you do the following.

1. Copy your V1.3/commands to V1.4b/commands  (all the files).

2. Copy commands.x?? to V1.4b/commands.

3. Type: cd V1.4b/commands

4. Type: install commands   where 'install' is the following shell script:

cleanit $1.x??		# strip off headers and trailers
cat $1.x?? | uudecode	# get the compressed shar file
compress -cd $1.sh.Z|sh	# extract all the files
patch <$1.cdif		# patch everything
rm $1.x?? $1.sh.Z $1.sh

My hope is that this will minimize work for everyone, be acceptable to
bitnet, and minimize network bandwidth.  My 'makepost' shell script is
below.  If anyone has suggestions or comments on this whole process, let
me know or post something.  However, don't salivate.  I am not ready with
1.4b yet.  I will ring the bell when it is time to salivate.

Andy Tanenbaum

# makepost new old postdir
# prepares a posting and puts the files in postdir
# All three arguments must be absolute path names

new=$1
old=$2
post=$3
dir=`basename $new`
case $# in
3)	echo "" >/dev/null ;;
*)	echo Usage: makepost newdir olddir postdir
		exit 1 ;;
esac

rm -rf W$$
mkdir W$$
cd W$$
for i in $new/*
do  b=`basename $i`
    if test -d $i
	then 
	    # It is a directory.  Skip
	    echo $i is a dir "(skipping)"
#	    makepost $new/$b $old/$b $post
#	    exit 0
	else
	    # It is a regular file.  See if it existed last time.
	    if test -r $old/$b
		then 
		    # It existed last time. Did it change?
		    if cmp -s $new/$b $old/$b
			then
			    # File didn't change.  Don't do anything.
			    echo $b is unchanged
			else
			    # File did change.
			    echo $b has been modified
			    cdiff $old/$b $new/$b >$b.CD
			    if bigger $b.CD $new/$b
				then cp $new/$b .
echo $b.CD bigger than $new/$b
ls -l $b.CD $new/$b
				     rm $b.CD
			    fi
		    fi
		else
		    # This file is new.
		    cp $new/$b .
	    fi
   fi
done

# At this point, W$$ contains *.CD and new files (*.c, *.h etc).
crc * >Crc
cat *.CD >$dir.cdif
if test -s $dir.cdif
    then echo "" >/dev/null
    else rm $dir.cdif
fi
ls -l			# for the log
rm -rf *.CD
shar * >/tmp/$dir.sh
rm *
compress -fc /tmp/$dir.sh >$dir.sh.Z
crc *Z
rm /tmp/$dir.sh
uuencode $dir.sh.Z <$dir.sh.Z >$dir.uue
rm $dir.sh.Z
split -800 $dir.uue
echo "------------------------- cut here -------------------------" >cutline
for j in xa?
do cat cutline $j cutline >$post/$dir.$j
done
rm -rf W$$
exit 0