mkscript

#!/bin/sh

# exit if command fails
set -e
# sane behaviour for cd
unset CDPATH
# set IFS to SP HT LF.
IFS=' 	
'

usage () {
  echo "Usage: $(basename "$0") [OPTIONS]... FILE

Creates a new script file and adds a header to the file according to the file \
exenstion.
If a template.\"type\" exists in ~/Templates, the content of this file will be \
used as content for the new created script file.
Makes the script file executeable.

options:
  -t <type>   type of the script file, must be the file extension
  -n          make the created file NOT executeable
  -h          display this help and exit"
}

filename=""
type_to_create=""
make_exec=1

while getopts ":t:nh" opt; do
  case "$opt" in
    t) type_to_create=$OPTARG ;;
    n) make_exec=0 ;;
    h) usage ; exit 0 ;;
    \?) usage ; exit 1 ;;
  esac
done

shift $((OPTIND-1))

[ $# -eq 0 ] && { usage ; exit 1 ; }

filename="$1"

[ -z "$type_to_create" ] && type_to_create="$(echo "$filename" |awk -F . '{if (NF>1) {print $NF}}')"
[ -z "$type_to_create" ] && { echo "No type found" ; exit 1 ; }
[ -f "$filename" ] && { echo "File '$filename' already exists." ; exit 2 ; }

template="${HOME}/Templates/template.${type_to_create}"

if [ -f "$template" ]; then
  cat "$template" >> "$filename"
else
  case "$type_to_create" in
    py)
      echo '#!/usr/bin/env python' >> "$filename"
      echo '# -*- coding: utf-8 -*-' >> "$filename"
      echo '# pylint: disable=invalid-name' >> "$filename"
      echo >> "$filename"
      echo 'import os' >> "$filename"
      echo 'import sys' >> "$filename"
      echo >> "$filename"
      echo >> "$filename"
      echo '# vim: ft=python ts=2 sts=2 sw=2 et:' >> "$filename"
      ;;

    pl)
      echo '#!/usr/bin/env perl' >> "$filename"
      echo >> "$filename"
      echo 'use warnings;' >> "$filename"
      echo 'use strict;' >> "$filename"
      echo >> "$filename"
      ;;

    sh)
      echo '#!/bin/sh' >> "$filename"
      echo >> "$filename"
      echo >> "$filename"
      echo '# vim: ft=sh ts=2 sts=2 sw=2 et:' >> "$filename"
      ;;

    bash)
      echo '#!/bin/bash' >> "$filename"
      echo >> "$filename"
      echo >> "$filename"
      echo '# vim: ft=sh ts=2 sts=2 sw=2 et:' >> "$filename"
      ;;

    scm)
      echo '#!/usr/bin/env guile' >> "$filename"
      echo '!#' >> "$filename"
      echo >> "$filename"
      echo >> "$filename"
      ;;

    tex)
      echo '\documentclass[11pt]{article}' >> "$filename"
      echo '\title{}' >> "$filename"
      echo '\author{<your name here>}' >> "$filename"
      echo '\begin{document}' >> "$filename"
      echo '\maketitle' >> "$filename"
      echo '\section{}' >> "$filename"
      echo '\end{document}' >> "$filename"
      echo >> "$filename"
      ;;

    c)
      echo '#include <stdio.h>' >> "$filename"
      echo '#include <stdlib.h>' >> "$filename"
      echo >> "$filename"
      echo 'int' >> "$filename"
      echo 'main(int argc, char *argv[])' >> "$filename"
      echo '{' >> "$filename"
      echo -e "\texit(EXIT_SUCCESS);" >> "$filename"
      echo '}' >> "$filename"
      ;;

    *)
      echo "Unknown script type $type_to_create"
      exit 3
      ;;
  esac
fi

[ -f "$filename" ] && [ "$make_exec" -eq 1 ] && chmod ugo+x "$filename"
exit $?

# vim: ft=sh ts=2 sts=2 sw=2 et: