On Tue, 8 Oct 2002 00:13:39 +0200, Ilya Konstantinov <[EMAIL PROTECTED]>
wrote:
>
> 1. Mount the ISOs into different directories.
> 2. Use my "union" utility to consolidate the different directories into one
> single directory. It creates directories and symbolic links as necessary, so
> that the target directory almost doesn't take up any disk space.
>
> Usage:
> union source-dir1 source-dir2 source-dir2 ... target-dir
>
> (Tip: If you want to offer those files via FTP, like we do, make the source
> directory paths relative -- because your FTP site doesn't begin at /)
>
> You can get it from
> http://toast.unwind.co.il/hacks/union
This union script is a VERY nice idea. I rewritten your perl script in
shell (I consider sh/bash more portable then perl), See below.
Ehud.
#! /bin/sh -e
# Compile by: /bin/sh -ex $*
#
# 1st arg = target-dir
# more args = sources dirs (to be symlinks)
# --------------------------------------------------
walk_dir () # walk all files on dir $1 (abs path)
{ # make symlinks / create dirs on $2 (abs
path)
SRC="$1" # source dir
DEST="$2" # destination
mkdir -p "$DEST" # create dir if does not exist
RLTV="$SRC" ########## FIX ME - relative address of $SRC to $DEST
cd $SRC # work in source dir
for SUBD in * # do for all files/dirs
do
DSUB="$DEST/$SUBD" # destination subdir
if [ -d "$SUBD" ] ; then # directory ?
( walk_dir "$SRC/$SUBD" "$DSUB" ) # walk this subdir (in subshell)
else
if [ -e "$DSUB" ] ; then # name already exists
echo "File $DSUB is multply defined, see below"
ls -al "$DSUB" # previous (symlink)
ls -al "$SRC/$SUBD" # current
echo " "
ERR=ON # error occurred
else
ln -s "$RLTV/$SUBD" "$DSUB" # create symbolic link (RELATIVE)
fi
fi
done
}
# ----------------------------------------------------------------------
umask 022 # read for all
TRGT=$1 # target dir
shift # leave only source dirs
CRNT=`pwd` # save current dir
mkdir -p $TRGT # create $TRGT if does not exist
cd $TRGT
TRGT=`pwd` # Target dir (absolute form)
ERR="" # no error switch
for SDIR in $@ # work on all source dirs
do
cd "$CRNT" # needed if source dir is relative path
cd "$SDIR"
CSDR=`pwd` # for error messages
walk_dir "$CSDR" "$TRGT" # walk all files on dir $CSDR
done
############################## union.sh ##############################
--
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