#!@R_SHELL@
# Shell wrapper for R executable.

R_HOME_DIR=
if test "${R_HOME_DIR}" = "@prefix@/@LIBnn@/R"; then
   case "@R_OS@" in
   linux*)
     run_arch=`uname -m`
     case "$run_arch" in 
        x86_64|mips64|ppc64|powerpc64|sparc64|s390x)
          libnn=lib64
          libnn_fallback=lib
        ;;
        *)
          libnn=lib
          libnn_fallback=lib64
        ;;
     esac
     if [ -x "@prefix@/${libnn}/R/bin/exec/R" ]; then
        R_HOME_DIR="@prefix@/${libnn}/R"
     elif [ -x "@prefix@/${libnn_fallback}/R/bin/exec/R" ]; then
        R_HOME_DIR="@prefix@/${libnn_fallback}/R"
     ## else -- leave alone (might be a sub-arch)
     fi
     ;;
  esac
fi

if test -n "${R_HOME}" && \
   test "${R_HOME}" != "${R_HOME_DIR}"; then
  echo "WARNING: ignoring environment value of R_HOME"
fi
R_HOME="${R_HOME_DIR}"
export R_HOME
R_SHARE_DIR="${R_HOME_DIR}/share"
export R_SHARE_DIR
R_INCLUDE_DIR="${R_HOME_DIR}/include"
export R_INCLUDE_DIR
R_DOC_DIR="${R_HOME_DIR}/doc"
export R_DOC_DIR

# Since this script can be called recursively, we allow R_ARCH to
# be overridden from the environment.
# This script is shared by parallel installs, so nothing in it should
# depend on the sub-architecture except the default here.
: ${R_ARCH=@R_ARCH@}

usage="
Usage: R [options] [< infile] [> outfile]
   or: R CMD command [arguments]

Start R, a system for statistical computation and graphics, with the
specified options, or invoke an R tool via the 'R CMD' interface.

Options:
  -h, --help            Print short help message and exit
  --version             Print version info and exit
  --encoding=ENC        Specify encoding to be used for stdin
  --encoding ENC        
  RHOME			Print path to R home directory and exit
  --save                Do save workspace at the end of the session
  --no-save             Don't save it
  --no-environ          Don't read the site and user environment files
  --no-site-file        Don't read the site-wide Rprofile
  --no-init-file        Don't read the user R profile
  --restore             Do restore previously saved objects at startup
  --no-restore-data     Don't restore previously saved objects
  --no-restore-history  Don't restore the R history file
  --no-restore          Don't restore anything
  --vanilla		Combine --no-save, --no-restore, --no-site-file,
			--no-init-file and --no-environ
  --no-readline         Don't use readline for command-line editing
  --min-vsize=N         Set vector heap min to N bytes; '4M' = 4 MegaB
  --max-vsize=N         Set vector heap max to N bytes;
  --min-nsize=N         Set min number of cons cells to N
  --max-nsize=N         Set max number of cons cells to N
  --max-ppsize=N        Set max size of protect stack to N
  -q, --quiet           Don't print startup message
  --silent              Same as --quiet
  --slave               Make R run as quietly as possible
  --interactive         Force an interactive session
  --verbose             Print more information about progress
  -d, --debugger=NAME   Run R through debugger NAME
  --debugger-args=ARGS  Pass ARGS as arguments to the debugger
  -g, --gui=TYPE	Use TYPE as GUI; possible values are 'X11'
			(default) and 'Tk'.
  --arch=NAME		Specify a sub-architecture
  --args                Skip the rest of the command line
  -f, --file=FILE       Take input from 'FILE'
  -e EXPR               Execute 'EXPR' and exit

Commands:
  BATCH			Run R in batch mode
  COMPILE		Compile files for use with R
  SHLIB			Build shared library for dynamic loading
  INSTALL		Install add-on packages
  REMOVE		Remove add-on packages
  build			Build add-on packages
  check			Check add-on packages
  LINK			Front-end for creating executable programs
  Rprof			Post-process R profiling files
  Rdconv		Convert Rd format to various other formats
  Rd2dvi		Convert Rd format to DVI
  Rd2pdf		Convert Rd format to PDF
  Rd2txt		Convert Rd format to pretty text
  Sd2Rd			Convert S documentation to Rd format
  Stangle		Extract S/R code from Sweave documentation
  Sweave		Process Sweave documentation
  Rdiff			Diff R output ignoring headers etc
  config		Obtain configuration information about R
  javareconf		Update the Java configuration variables
  rtags                 Create Emacs-style tag files from C, R, and Rd files

Please use 'R CMD command --help' to obtain further information about
the usage of 'command'.

Report bugs to <r-bugs@r-project.org>."

### We also have this in compiled code -> use that one to always be in sync
# version="R REPLACE_BY_VERSION.
# Copyright (C) REPLACE_BY_YEAR R Development Core Team

# R is free software and comes with ABSOLUTELY NO WARRANTY.
# You are welcome to redistribute it under the terms of the GNU
# General Public License.  For more information about these matters,
# see http://www.gnu.org/copyleft/gpl.html."


## some systems have a more portable sed, e.g. /usr/xpg4/bin/sed on Solaris,
## so make sure that is used.
SED=@SED@
export SED

error () {
  echo "ERROR: $*" >&2
  exit 1
}

### Argument loop
args=
debugger=
debugger_args=
gui=
while test -n "${1}"; do
  case ${1} in
    RHOME|--print-home)
      echo "${R_HOME}"; exit 0 ;;
    CMD)
      shift;
      export R_ARCH
      . ${R_HOME}/etc${R_ARCH}/ldpaths
      exec sh "${R_HOME}/bin/Rcmd" @OSF_SH_BUG@ ;;
    -g|--gui)
      if test -n "`echo ${2} | ${SED} 's/^-.*//'`"; then      
	gui="${2}"
        args="${args} ${1} ${2}"
	shift
      else
	error "option '${1}' requires an argument"
      fi
      ;;
    --gui=*)
      gui=`echo "${1}" | ${SED} -e 's/[^=]*=//'`
      args="${args} ${1}"
      ;;
    -d|--debugger)
      if test -n "`echo ${2} | ${SED} 's/^-.*//'`"; then      
	debugger="${2}"; shift
      else
	error "option '${1}' requires an argument"
      fi
      ;;
    --debugger=*)
      debugger=`echo "${1}" | ${SED} -e 's/[^=]*=//'` ;;
    --debugger-args=*)
      debugger_args=`echo "${1}" | ${SED} -e 's/[^=]*=//'` ;;
    -h|--help)
      echo "${usage}"; exit 0 ;;
## use the version in compiled code to always be in sync      
#    --version)
#      echo "${version}"; exit 0 ;;
    --args)
      break ;;
    --arch)
      if test -n "`echo ${2} | ${SED} 's/^-.*//'`"; then
	R_ARCH="/${2}"
        shift
      else
        error "option '${1}' requires an argument"
      fi
      ## check sub-architecture here for a better error message
      if ! test -d ${R_HOME}/etc${R_ARCH}; then
        error "sub-architecture '${1}' is not installed"
      fi
      ;;
    --arch=*)
      r_arch=`echo "${1}" | ${SED} -e 's/[^=]*=//'`
      R_ARCH="/${r_arch}"
      ## check sub-architecture here for a better error message
      if ! test -d ${R_HOME}/etc${R_ARCH}; then
        error "sub-architecture '${r_arch}' is not installed"
      fi
      ;;
    -e)
      if test -n "`echo ${2} | ${SED} 's/^-.*//'`"; then      
	a=`echo "${2}" | ${SED} -e 's/ /~+~/g'`; shift
      else
	error "option '${1}' requires an argument"
      fi
      args="${args} -e $a"
      ;;
    *)
      args="${args} ${1}" ;;
  esac
  shift
done

. ${R_HOME}/etc${R_ARCH}/ldpaths

R_binary="${R_HOME}/bin/exec${R_ARCH}/R"
export R_ARCH

case "${gui}" in
Tk|tk|X11|x11)
  ;;
"")
  ;;
*)
  error "unknown GUI ${gui}"
esac

## R_HOME may have moved, so check
if test -x "${R_HOME}"; then
  :
else
  error "R_HOME ('${R_HOME}') not found"
fi

## Startup
if test -z "${debugger}"; then
  exec "${R_binary}" @R_BATCHSAVE@ ${args} @OSF_SH_BUG@
else
  ## Ideally, we would like the debugger to start R with additional
  ## ('inferior') arguments, but not all debuggers can do this.  We know
  ## about valgrind and some versions of GDB , and deal with these.
  ## Otherwise, to be on the safe side, we disregard non-debugger
  ## command line args.
  args_ok=no
  case "`${debugger} --version 2>/dev/null`" in
    "GNU gdb"*)
      if ${debugger} --help 2>/dev/null | \
          grep ' *--args' >/dev/null; then
	args_ok=yes
	debugger_args="${debugger_args} --args"
      fi
      ;;
    valgrind*)
      args_ok=yes
      ;;
  esac
  if test -n "${args}${*}" && test "${args_ok}" = no; then
    args=`expr "${args} ${*}" : " *\(.*\)"`
    echo "*** Further command line arguments ('${args}') disregarded"
    echo "*** (maybe use 'run ${args}' from *inside* ${debugger})"
    echo ""
    exec ${debugger} ${debugger_args} "${R_binary}"
  else
    exec ${debugger} ${debugger_args} "${R_binary}" ${args} @OSF_SH_BUG@
  fi
fi

### Local Variables: ***
### mode: sh ***
### sh-indentation: 2 ***
### End: ***
