#!/bin/sh
#  Rd2dvi -- check man pages (*.Rd help files) by LaTeX..
#
# Examples:
#  R CMD Rd2dvi /path/to/Rsrc/src/library/base/man/Normal.Rd
#  R CMD Rd2dvi `grep -l "\\keyword{distr" \
#                  /path/to/Rsrc/src/library/base/man/*.Rd | sort | uniq`

START_DIR=`pwd`

CLEAN=true
DEBUG=false
USE_XDVI=true

file_sed='s/[_$]/\\\\&/g'

while test -n "${1}"; do
  case ${1} in
    --clean=[nN]*)
      CLEAN=false ;;
    --clean=[yY]*)
      CLEAN=true ;;
    --debug=[nN]*)
      DEBUG=false ;;
    --debug=[yY]*)
      DEBUG=true ;;
    --use-xdvi=[nN]*)
      USE_XDVI=false ;;
    --use-xdvi=[yY]*)
      USE_XDVI=true ;;
    --|*)
      break ;;
  esac
  shift
done

TOC="\\Rdcontents{\\R{} objects documented:}"
if [ ${#} -eq 1 -a -d ${1} ]; then
  if test -d ${1}/man; then
    dir=${1}/man
  else
    dir=${1}
  fi
  if ${DEBUG}; then
    echo "Rd2dvi: \`Rdconv -t latex' ${dir}/ Rd files ..."
  fi
  files=`find ${dir} -name "*.[Rr]d" -print`
  subj="all in \\file{`echo ${dir} | sed ${file_sed}`}"
  if ${DEBUG}; then  
    echo "files = ${files}"
  fi
else
  files="${@}"
  if [ ${#} -gt 1 ]; then
    subj=" etc.";
  else
    subj=
    TOC=
  fi
  subj="\\file{`echo ${1} | sed ${file_sed}`}${subj}"
  if ${DEBUG}; then
    echo "Rd2dvi: Collecting files and \`Rdconv -t latex'ing them ..."
  fi
fi

if ${DEBUG}; then
  echo ""; echo "subj:"; echo "${subj}"; echo ""
fi

if test -f Rd2.dvi; then
  echo "file \`Rd2.dvi' exists; please remove first"
  exit 1
fi
BUILD_DIR=.Rd2dvi${$}
if test -d ${BUILD_DIR}; then
  rm -rf ${BUILD_DIR} || echo "cannot write to build dir" && exit 2
fi
mkdir ${BUILD_DIR}

sed 's/markright{#1}/markboth{#1}{#1}/' \
  ${R_HOME}/doc/manual/Rd.sty > ${BUILD_DIR}/Rd2.sty

cat > ${BUILD_DIR}/Rd2.tex <<EOF
\\documentclass[${R_PAPERSIZE}]{book}
\\usepackage{Rd2}
\\usepackage{makeidx}
\\makeindex
\\begin{document}
\\chapter*{}
\\begin{center}
  {\\textbf{\\huge\\R{} documentation}}
  \\par\\bigskip{\\Large of ${subj}}
  \\par\\medskip{\\large \\today}
\\end{center}
${TOC}
EOF

for f in ${files}; do
  if ${DEBUG}; then echo ${f}; fi
  R CMD Rdconv -t latex ${f} >> ${BUILD_DIR}/Rd2.tex
done

cat >> ${BUILD_DIR}/Rd2.tex <<EOF  
\\printindex
\\end{document}
EOF

cd ${BUILD_DIR}
${R_LATEXCMD} Rd2
${R_MAKEINDEXCMD} Rd2
${R_LATEXCMD} Rd2
cp Rd2.dvi ..
cd ${START_DIR}
if ${CLEAN}; then
  rm -rf ${BUILD_DIR}
else
  echo "You may want to clean up by \`rm -rf ${BUILD_DIR}'"
fi
if ${USE_XDVI}; then
  xdvi Rd2.dvi
fi