#!/bin/sh

# TODO
# Check all dependencies first, then build the target.
# Each target shall be implemented as one function.

if test $# -lt 1; then
  echo "  $0: Incorrect number ($#) of parameters passed: $*"
fi
OUTFILE=$1
if test $OUTFILE = gawk.texi; then
  INFILE=gawktexi.in
  COMMAND="awk -f sidebar.awk < gawktexi.in > gawk.texi"
elif test $OUTFILE = gawk.dvi; then
  INFILE=gawk.texi
  COMMAND="texi2dvi  -q --clean gawk.texi"
elif test $OUTFILE = gawkinet.dvi; then
  INFILE=gawkinet.texi
  COMMAND="texi2dvi  -q --clean gawkinet.texi"
elif test $OUTFILE = gawk.1.ps; then
  INFILE=gawk.1
  COMMAND="groff -z -man gawk.1 > gawk.1.ps"
elif test $OUTFILE = igawk.1.ps; then
  INFILE=igawk.1
  COMMAND="groff -z -man igawk.1 > igawk.1.ps"
elif test $OUTFILE = gawk.1.pdf; then
  INFILE=gawk.1.ps
  COMMAND="ps2pdf -q gawk.1.ps gawk.1.pdf"
elif test $OUTFILE = igawk.1.pdf; then
  INFILE=igawk.1.ps
  COMMAND="ps2pdf -q igawk.1.ps igawk.1.pdf"
elif test $OUTFILE = gawk.ps; then
  INFILE=gawk.dvi
  COMMAND="dvips -q -o gawk.ps gawk.dvi"
elif test $OUTFILE = gawkinet.ps; then
  INFILE=gawkinet.dvi
  COMMAND="dvips -q -o gawkinet.ps gawkinet.dvi"
elif test $OUTFILE = gawk.pdf; then
  INFILE=gawk.ps
  COMMAND="ps2pdf -q gawk.ps gawk.pdf"
elif test $OUTFILE = gawkinet.pdf; then
  INFILE=gawkinet.ps
  COMMAND="ps2pdf -q gawkinet.ps gawkinet.pdf"
else
  echo "  unknwon target $OUTFILE"
  exit 1
fi

if ! test -r "$INFILE"; then
  echo " $0: Cannot read input file $INFILE"
  exit 1
fi

if test -f "$OUTFILE"; then
  if test "$INFILE" -ot "$OUTFILE" ; then
    printf "  Target %15s is up-to-date\n" $OUTFILE
    exit 0
  fi
fi
echo "  Generating $OUTFILE from $INFILE"
echo $COMMAND | sh