mailcap to mc.ext script

[mcINEK <kaioshin@gazeta.pl>]

Hi!

I've just wrote a script which generates a /etc/mc/mc.ext file using
information from mime.types and mailcap files.

I found it very useful. It takes a list of extensions from mime.types
then check if in mailcap we've got support for that extension.
If yes it put this extension do mc.ext and assings action (run-mailcap).

I think, it's very good to automate generating mc.ext file.
When user install software that provides /etc/mailcap record it will be
automagically added to mc.ext.

Please, share with me with your opinions.

PS.
I'm not good in writing shell scripts, and this script is running very
slow. If you can, please improve it.

Regards.
Marcin
-- 
      .---,             --:   mcINEK   :--
     /  ,. \   '   T h e   O w l s  a r e  n o t     
    |  |  ; ;    W h a t   T h e y   S e e m . . .   '
     \ `._ /        wrote on Debian GNU/Linux SID

# !/bin/bash
# This script converts /etc/mailcap records to Midnigh Commander
# configuration file /etc/mc/mc.ext.
#
# Author: mcINEK <kaioshin@gazeta.pl>

mailcap_file="/etc/mailcap"
mime_types_file="/etc/mime.types"
mc_ext_file="mc.ext" # just debug, change it to /etc/mc/mc.ext
tmp_file="/tmp/mc.ext.tmp"

if [ ! -e $mailcap_file ]; then
  echo "Can't find $mailcap_file"
  echo "Be sure that mail-support package is installed."
  exit
fi

echo "Generating $mc_ext_file ..."

cat $mime_types_file | sed '/^#.*/d' | sed '/^$/d' > $tmp_file

{
echo "# This file is generated by a script."
echo
} > $mc_ext_file

while read line; do
  mime_type=`echo $line | awk -F' ' '{ print $1 }'`
  mime_ext=`echo $line | awk -F' ' '{ for(i=2;i<=NF;i++) {print $i} }'`
  
  ext_count=`echo $mime_ext | awk '{ print NF }'`

  if [ $ext_count == "0" ]; then
    continue
  fi

  is_in_mailcap=`grep "$mime_type" $mailcap_file`

  if [ "$is_in_mailcap" == "" ]; then
    echo -n "."
    continue
  fi
 
  # put a mime type into file (optional)
  # you can comment it out
  echo "# $mime_type" >> $mc_ext_file
   
  if [ $ext_count == "1" ]; then
    echo "shell/.$mime_ext" >> $mc_ext_file

  else
    for ((i=0; i<$ext_count; i++)); do
      mime_ext=`echo $mime_ext | sed 's/ /|/'`
    done
    
    echo "regex/\\.($mime_ext)\$" >> $mc_ext_file
    
  fi

  echo "	Open=run-mailcap $mime_type:%f" >> $mc_ext_file
  echo                     >> $mc_ext_file

  echo -n "o"

done < $tmp_file

rm $tmp_file

echo

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