#!/bin/bash

#
# Script to convert the content of a (Unix) tarfile to a format that's
# more Windows/DOS friendly.
#
# Search for ASCII text files then call unix2dos to fix the end-of-line
# stuff + renamed them with suffix .txt so that they can be opened with
# notepad.
#

#
# Check argument
#
if [[ $# != 1 ]]; then
   echo "Usage: $0 <tarfile>"
   exit 1
else
   tarfile=$1
fi


#
# Split the tarfile name into directory/file + find suffix
#
the_archive=`basename $tarfile`
the_archive_dir=`dirname $tarfile`

case "$the_archive" in
  *.tar )
     suffix=".tar"
     untar_cmd="tar xf"
  ;;

  *.tgz )
     suffix=".tgz"
     untar_cmd="tar xf"
  ;;
 
  *.tar.gz )
     suffix=".tar.gz"
     untar_cmd="tar xf"
  ;;

  *.zip )
     suffix=".zip"
     untar_cmd="unzip -q"
  ;;
 
  *)
     echo "Can't process $tarfile"
     exit 1
  ;;

esac

the_base=`basename $the_archive $suffix`


#
# System-dependent configuration
#
os_name=`uname 2>/dev/null` || os_name=unknown

case "$os_name" in
  *Darwin* )
     mktemp_cmd="/usr/bin/mktemp -d -t xxx"
  ;;

  * )
     mktemp_cmd="mktemp -d"
  ;;

esac


#
# Temporary directory
#
current_dir=`pwd`
tmpdir=`$mktemp_cmd` || { echo "Can't create temporary directory" ; exit 1 ; }

#
# Copy and unzip the archive in this directory
#
cp $tarfile $tmpdir
cd $tmpdir
$untar_cmd $the_archive
rm $the_archive

echo "Processing archive: $tarfile"
# echo "  directory: $the_archive_dir"
# echo "  file name: $the_archive"
# echo "  base name: $the_base"
# echo "  suffix:    $suffix"
# echo "  tmpdir:    $tmpdir"


#
# All files we want to process are in $tmpdir
# We care about any file 'xxx.txt' or any ASCII file without a suffix
#
for f in `find . -type f` ; do

   case `basename $f` in
      *.txt )
           unix2dos $f
      ;;

      Makefile* | makefile* | *.* )
      ;; 

      *)
	   file_type=`file -b $f`
           case "$file_type" in
              ASCII*text | UTF*text )
		unix2dos $f
		mv -n $f $f.txt
              ;;
           esac
      ;;

   esac
  
done


#
# Rezip the whole thing
#
zipfile=$the_base.zip
content=`ls`
echo "Building $zipfile"
echo "zip -r $zipfile $content"
zip -q -r $zipfile $content

#
# Copy the result
#
cd $current_dir

if [[ "$zipfile" == "$the_archive" ]] ; then 
   mv "$tarfile" "$tarfile".save
fi

cp $tmpdir/$zipfile $the_archive_dir
echo "Created zip file in $the_archive_dir/$zipfile"

#
# Clean up
#
rm -rf $tmpdir