#!/bin/bash
# maned.sh
# A rudimentary man page editor

# Version: 0.1 (Alpha, probably buggy)
# Author: Mendel Cooper <thegrendel@theriver.com>
# Reldate: 16 June 2008
# License: GPL3


savefile=      # Global, used in multiple functions.
E_NOINPUT=90   # User input missing (error). May or may not be critical.

# =========== Markup Tags ============ #
TopHeader=".TH"
NameHeader=".SH NAME"
SyntaxHeader=".SH SYNTAX"
SynopsisHeader=".SH SYNOPSIS"
InstallationHeader=".SH INSTALLATION"
DescHeader=".SH DESCRIPTION"
OptHeader=".SH OPTIONS"
FilesHeader=".SH FILES"
EnvHeader=".SH ENVIRONMENT"
AuthHeader=".SH AUTHOR"
BugsHeader=".SH BUGS"
SeeAlsoHeader=".SH SEE ALSO"
BOLD=".B"
# Add more tags, as needed.
# See groff docs for markup meanings.
# ==================================== #

start ()
{
clear                  # Clear screen.
echo "ManEd"
echo "-----"
echo
echo "Simple man page creator"
echo "Author: Mendel Cooper"
echo; echo; echo
}

progname ()
{
  echo -n "Program name? "
  read name

  echo -n "Manpage section? [Hit RETURN for default (\"1\") ]  "
  read section
  if [ -z "$section" ]
  then
    section=1   # Most man pages are in section 1.
  fi

  if [ -n "$name" ]
  then
    savefile=""$name"."$section""       #  Filename suffix = section.
    echo -n "$1 " >>$savefile
    name1=$(echo "$name" | tr a-z A-Z)  #  Change to uppercase,
                                        #+ per man page convention.
    echo -n "$name1" >>$savefile
  else
    echo "Error! No input."             # Mandatory input.
    exit $E_NOINPUT                     # Critical!
  fi

  echo -n "  \"$section\"">>$savefile   # Append, always append.

  echo -n "Version? "
  read ver
  echo -n " \"Version $ver \"">>$savefile
  echo >>$savefile

  echo -n "Short description [0 - 5 words]? "
  read sdesc
  echo "$NameHeader">>$savefile
  echo ""$BOLD" "$name"">>$savefile
  echo "\- "$sdesc"">>$savefile

}

fill_in ()
{ # This function more or less copied from "pad.sh" script.
  echo -n "$2? "       # Get user input.
  read var             # May paste (a single line only!) to fill in field.

  if [ -n "$var" ]
  then
    echo "$1 " >>$savefile
    echo -n "$var" >>$savefile
  else                 # Don't append empty field to file.
    return $E_NOINPUT  # Not critical here.
  fi

  echo >>$savefile

}    


end ()
{
clear
echo -n "Would you like to view the saved man page (y/n)? "
read ans
if [ "$ans" = "n" -o "$ans" = "N" ]; then exit; fi
exec less "$savefile"  #  Exit script and hand off control to "less" ...
                       #+ ... which formats for viewing man page source.
}


# ---------------------------------------- #
start
progname "$TopHeader"
fill_in "$SynopsisHeader" "Synopsis"
fill_in "$DescHeader" "Long description"
# May paste in *single line* of text.
fill_in "$OptHeader" "Options"
fill_in "$FilesHeader" "Files"
fill_in "$AuthHeader" "Author"
fill_in "$BugsHeader" "Bugs"
fill_in "$SeeAlsoHeader" "See also"
# fill_in "$OtherHeader" ... as necessary.
end    # ... exit not needed.
# ---------------------------------------- #

#  Note that the generated man page will usually
#+ require manual fine-tuning with a text editor.
#  However, it's a distinct improvement upon
#+ writing man source from scratch
#+ or even editing a blank man page template.

#  The main deficiency of the script is that it permits
#+ pasting only a single text line into the input fields.
#  This may be a long, cobbled-together line, which groff
#  will automatically wrap and hyphenate.
#  However, if you want multiple (newline-separated) paragraphs,
#+ these must be inserted by manual text editing on the
#+ script-generated man page.
#  Exercise (difficult): Fix this!

#  This script is not nearly as elaborate as the
#+ full-featured "manedit" package (http://wolfpack.twu.net),
#+ but it's much easier to use.