#!/bin/bash

#
# TODO:
#
# * In case of an installed Dune, it should not be necessary to pass the
#   dune-common dir to autogen.sh.
# * Check module names entered as dependencies.

set -e

canonicalname(){
	if test $# -ne 1; then
		echo Usage: canonicalname path >&2
		return 1
	fi
	file="`eval echo $1`" # expand ~
	if test ! -e "$file"; then
		echo $file: file not found >&2
		return 1
	fi
    # if this is a symlink, then follow the symlink
	if test -L "$file"; then
		fdir="`dirname \"$file\"`"
		flink="`readlink \"$file\"`"
		if test -e "$flink"; then
			# these are absolute links, or links in the CWD
			canonicalname "$flink"
		else
			canonicalname "$fdir/$flink"
		fi
	else
        # if this is a file, then remember the filename and
        # canonicalize the directory name
		if test -f "$file"; then
			fdir="`dirname \"$file\"`"
			fname="`basename \"$file\"`"
			fdir="`canonicalname \"$fdir\"`"
			echo "$fdir/$fname"
		fi
        # if this is a directory, then create an absolute 
        # directory name and we are done
		if test -d "$file"; then
			(cd "$file"; pwd)
		fi
	fi
}

canonicalpath(){
  if test $# -ne 1; then
     echo Usage: canonicalpath path >&2
     return 1
  fi
  dirname $(canonicalname "$1")
}

pkg_config_dependencies(){
    if test $# -ne 1; then
	echo Usage: pkg_config_dependencies name >&2
	return 1
    fi
    name="$1"
    depends="`pkg-config --variable=DEPENDENCIES $name| sed -e 's/,/ /g'`"
    for pkg in $depends; do
	depends="$depends `pkg_config_dependencies $pkg`"
    done
    echo $depends
}

modulesexist(){
  allfound=0

  for dep in $1; do
      found=0
      for module in $2; do
	  if [ "$dep" = "$module" ]; then
	      found=1
	      break
	  fi
      done
      if [ "$found" = "0" ]; then
          # Module not found in list, try pkg-config
          pkg-config $module &> /dev/null
          found=$?
      fi
      if [ "$found" = "0" ]; then
	  echo "ERROR:">&2
	  echo "Module with name $dep was not found" >&2
	  echo "Did you forget to specify it's location" >&2
	  echo "in the DUNE_CONTROL_PATH variable?">&2
	  echo >&2
	  allfound=1
      fi
  done
  return $allfound
}

make_unique(){
  if [ "$#" = "1" ]; then
      # take first word
      for exclude_word in $1; do
	  break;
      done
      make_unique $exclude_word "$1" 0
  else
      local exclude_word="$1"
      local words="$2"
      local pos="$3"
      local length=0
      local i=0
      local new_words=""
      local cur=0
      for word in $words; do
	  if [ $i -le $pos ]; then
	      i=$((i+1))
	      length=$((length+1))
	      new_words="$new_words $word"
	      continue
	  fi
	  if [ "$word" != "$exclude_word" ]; then
	      new_words="$new_words $word"
	      if [ "$((length-1))" = "$pos" ]; then
		  next_word="$word"
	      fi
	      length=$((length+1))
	  fi
      done
      if [ "$pos" -lt "$length" ]; then
       # process next word
	  make_unique "$next_word" "$new_words" $((pos+1))
      else
	  export UNIQUE_WORDS="$new_words"
      fi
  fi
}
       
echo
echo == Dune project/module generator ==
echo
echo duneproject will assist you in the creation of a new Dune application.
echo During this process a new directory with the name of your project will be
echo created. This directory will hold all configuration and Makefiles and a
echo simple example application.
echo

################## FIND AVAILABLE MODULES ##################

. $(canonicalpath $0)/../lib/dunemodules.lib

# create PKG_CONFIG_PATH for installed dune modules
export PKG_CONFIG_PATH="$PKG_CONFIG_PATH:$(canonicalpath $0)/../lib/pkgconfig"

# search for modules, both installed and src modules
find_modules_in_path

# sort modules to remove duplicates
sort_modules $FOUND_MODULES
FOUND_MODULES=$MODULES

# get the real module names
MODULES=""
for i in $FOUND_MODULES; do
  mod=$(eval echo \$NAME_$i)
  MODULES="$MODULES$mod "
done

if [ "$MODULES" = "" ]; then
  echo "ERROR:">&2
  echo "  No dune modules were found!">&2
  echo "  Did you forget to specify the places where ">&2
  echo "  you installed your modules in the ">&2
  echo "  DUNE_CONTROL_PATH environment variable">&2
  echo "  and adjusted the PKG_CONFIG_PATH environment">&2
  echo "  accordingly?" >&2
  exit 1;
fi

################## READ CMDLINE OPTIONS ##########
PROJECT="$1"
DEPENDENCIES="$2"
VERSION="$3"
MAINTAINER="$4"

################## READ OPTIONS ##################

while [ "$DATACORRECT" != "y" -a "$DATACORRECT" != "Y" ]; do
  while [ -z $PROJECT ]; do
    read -p "1) Name of your new Project? (e.g.: dune-grid): " PROJECT
    if echo "$MODULES" | grep -q ^$PROJECT$; then
      read -p "   A module named $PROJECT already exists. Continue anyway? [y/N] " CONT
      if test x$DELETE = xy -o x$DELETE = xY; then
        PROJECT=""
      fi
    fi
  done
  MODULE="$PROJECT"

  DEPOK=1

  while [ "$DEPOK" != 0 ]; do
  echo "2) Which modules should this module depend on?"
  echo "   Following modules are found:"
  echo "   $MODULES"
#  for i in $MODULES; do echo -n " $i"; done
#  echo ""
  while [ -z "$DEPENDENCIES" ]; do
      read -p "   Enter space separated list: " DEPENDENCIES
  done
  set +e
  modulesexist "$DEPENDENCIES" "$MODULES"
  DEPOK=$?
  set -e
  if [ "$DEPOK" != 0 ]; then
    DEPENDENCIES=""
  fi
  done

  while [ -z $VERSION ]; do
    read -p "3) Project/Module version? " VERSION
  done
  while [ -z $MAINTAINER ]; do
    read -p "4) Maintainers email address? " MAINTAINER
  done

  echo
  echo "creating Project \"$PROJECT\", version $VERSION "
  echo "which depends on \"$DEPENDENCIES\""
  echo "with maintainer \"$MAINTAINER\""
  read -p "Are these informations correct? [y/N] " DATACORRECT

  # reset data if necessary
  if [ "$DATACORRECT" != "y" -a "$DATACORRECT" != "Y" ]; then
    PROJECT=""
    DEPENDENCIES=""
    VERSION=""
    MAINTAINER=""
  fi
done

echo
echo "A sample code $MODULE.cc is generated in the \"$PROJECT\" directory."
echo "Look at the README and dune.module files there."
echo "Now you can run the dunecontrol script which will setup the new module."
echo "Sometimes you may have to tweak configure.ac a bit."

if test -d $PROJECT; then
  echo WARNING:
  echo "A directory with the name $PROJECT already exists."
  echo "Do you want to continue anyway?"
  read -p "Type Y to overwrite the old directory, N to abort. [y/N] " DELETE
  if test x$DELETE != xy -a x$DELETE != xY; then
    echo Abort...
    exit 1
  fi
  rm -rf "$PROJECT"
fi
mkdir "$PROJECT"

################## dune.module ##################
cat > "$PROJECT/dune.module" <<C_DELIM
################################
# Dune module information file #
################################

#Name of the module
Module: $MODULE
Version: $VERSION
Maintainer: $MAINTAINER
#depending on 
Depends: $DEPENDENCIES
C_DELIM

################## CONFIGURE.AC ##################

## Create the parameters passed to DUNE_CHECK_ALL

# save module list of dunemodules.inc
save_MODULES=$MODULES
for name in $DEPENDENCIES; do
  mod="`fix_variable_name $name`"
  if test "x$(eval echo \$HAVE_$mod)" != "x"; then
    # found via dunemodules.inc
    sort_modules "$mod"
    for mod in $MODULES; do
      M_DEPS="$M_DEPS $(eval echo \$NAME_$mod)"
    done
    MODULES=$save_MODULES
  else
    # found via pkg-config
    M_DEPS="`pkg_config_dependencies $name` $name"
  fi
  for dep in $M_DEPS; do
      CHECK="$CHECK [$dep]"
  done
done
set +x
make_unique "$CHECK"

# insert , between modules
j=0
for dep in $UNIQUE_WORDS; do
if [ "$j" = "0" ]; then
      CHECK="$dep"
      j=1
    else
      CHECK="$CHECK, $dep"
    fi
done

echo "------------------------------------------"
echo "writing initial files:"

# we need the module with _ instead of - to not confuse automake
fix_and_assign CMODULE $MODULE
NAME=`echo $PROJECT | sed -e 's/dune[_-]//' | tr '-' '_'`

################## CONFIGURE.AC ##################
echo "- $PROJECT/configure.ac"
cat > "$PROJECT/configure.ac" <<C_DELIM
# -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
AC_PREREQ(2.50)
DUNE_AC_INIT # gets module version from dune.module file
AM_INIT_AUTOMAKE
AC_CONFIG_SRCDIR([src/$CMODULE.cc])
AM_CONFIG_HEADER([config.h])


# we need no more than the standard DE-stuff
# this module depends on $DEPENDENCIES
# this implies checking for $CHECK
DUNE_CHECK_ALL

# implicitly set the Dune-flags everywhere
AC_SUBST(AM_CPPFLAGS, \$DUNE_CPPFLAGS)
AC_SUBST(AM_LDFLAGS, \$DUNE_LDFLAGS)
LIBS="\$DUNE_LIBS"

AC_CONFIG_FILES([
  Makefile
  src/Makefile
  doc/Makefile
  doc/doxygen/Makefile
  doc/doxygen/Doxyfile
  dune/Makefile
  dune/$NAME/Makefile
  m4/Makefile
  $MODULE.pc
])
AC_OUTPUT
# finally print the summary information
DUNE_SUMMARY_ALL
C_DELIM

################## README ##################
echo "- $PROJECT/README"
cat > "$PROJECT/README" <<R_DELIM
Preparing the Sources
=========================

Additional to the software mentioned in README you'll need the
following programs installed on your system:

  automake >= 1.5

  autoconf >= 2.50

  libtool

Getting started
---------------

If these preliminaries are met, you should run 

  dunecontrol all

which will find all installed dune modules as well as all dune modules 
(not installed) which sources reside in a subdirectory of the current 
directory. Note that if dune is not installed properly you will either
have to add the directory where the dunecontrol script resides (probably 
./dune-common/bin) to your path or specify the relative path of the script.

On your project and all uninstalled DUNE source modules found the script 
will then calls the GNU autoconf/automake to create a ./configure-script 
and the Makefiles. Afterwards that configure script will be called and the
modules will be build using make all

Most probably you'll have to provide additional information to dunecontrol 
(e. g. compilers, configure options) and/or make options. 

The most convenient way is to use options files in this case. The files
defining three variables:

AUTOGEN_FLAGS    flags passed to autogen
CONFIGURE_FLAGS  flags passed to configure
MAKE_FLAGS       flags passed to make

An example options file might look like this:

#use this options to autogen, configure and make if no other options are given
AUTOGEN_FLAGS="--ac=2.50 --ac=1.8" #Forces automake 2,50 and autoconf 1.8
CONFIGURE_FLAGS="CXX=g++-3.4 --prefix=/install/path" #force g++-3.4 as compiler
MAKE_FLAGS=install #Per default run make install instead of simply make

If you save this information into example.opts you can path the opts file to
dunecontrol via the --opts option, e. g.

  dunecontrol --opts=example.opts all

To get a full list of available configure flags just run

  dunecontrol configure --help

after running at least 
  dunecontrol autogen

More info
---------

See

     dunecontrol --help
   
for further options.


The full build-system is described in the dune-common/doc/buildsystem (SVN version) or under share/doc/dune-common/buildsystem if you installed DUNE!

\$Id$

R_DELIM

################## MAKEFILE.AM ##################
DISTCHECK_CONFIGURE_FLAGS=
for name in $DEPENDENCIES; do
  capital=`echo $name | tr '[a-z-]' '[A-Z_]'`
  DISTCHECK_CONFIGURE_FLAGS=$DISTCHECK_CONFIGURE_FLAGS"--with-${name}=\$(${capital}_ROOT) "
done
echo "- $PROJECT/Makefile.am"
cat> "$PROJECT/Makefile.am" << M_DELIM
# \$Id$

# we need the module file to be able to build via dunecontrol
EXTRA_DIST=dune.module

SUBDIRS = src m4 dune doc

if BUILD_DOCS
# TODO: set up documentation tree automatically
#SUBDIRS += doc
endif

# don't follow the full GNU-standard
# we need automake 1.5
AUTOMAKE_OPTIONS = foreign 1.5

# pass most important options when "make distcheck" is used
DISTCHECK_CONFIGURE_FLAGS = $DISTCHECK_CONFIGURE_FLAGS CXX="\$(CXX)" CC="\$(CC)"

include \$(top_srcdir)/am/top-rules
include \$(top_srcdir)/am/global-rules

M_DELIM

################## STAMP-VC ##################
echo "- $PROJECT/stamp-vc"
echo 'A stamp file to signify that this directory comes from a version control system, not an unpacked tarball' > $PROJECT/stamp-vc

################## PROJECT.PC.IN ##################
echo "- $PROJECT/$MODULE.pc.in"
cat> "$PROJECT/$MODULE.pc.in" << CC_DELIM
prefix=@prefix@
exec_prefix=@exec_prefix@
libdir=@libdir@
includedir=@includedir@
CXX=@CXX@
CC=@CC@
DEPENDENCIES=@REQUIRES@

Name: @PACKAGE_NAME@
Version: @VERSION@
Description: $MODULE module
URL: http://dune-project.org/
Requires: ${DEPENDENCIES}
Libs: -L${libdir}
Cflags: -I${includedir}
CC_DELIM
echo "    Please remember to update your $PROJECT/$MODULE.pc.in,"
echo "    Description and URL are missing right now."

###############################################################
################## The source subdirectory ####################
###############################################################

mkdir "$PROJECT/src"

################## src/MAKEFILE.AM ##################

echo "- $PROJECT/src/Makefile.am"
cat> "$PROJECT/src/Makefile.am" << M_DELIM

SUBDIRS =

noinst_PROGRAMS = ${CMODULE}

${CMODULE}_SOURCES = $CMODULE.cc

${CMODULE}_CPPFLAGS = \$(AM_CPPFLAGS) \\
	\$(DUNEMPICPPFLAGS) \\
	\$(UG_CPPFLAGS) \\
	\$(AMIRAMESH_CPPFLAGS) \\
	\$(ALBERTA_CPPFLAGS) \\
	\$(ALUGRID_CPPFLAGS)
# The libraries have to be given in reverse order (most basic libraries
# last).  Also, due to some misunderstanding, a lot of libraries include the
# -L option in LDFLAGS instead of LIBS -- so we have to include the LDFLAGS
# here as well.
${CMODULE}_LDADD = \\
	\$(DUNE_LDFLAGS) \$(DUNE_LIBS) \\
	\$(ALUGRID_LDFLAGS) \$(ALUGRID_LIBS) \\
	\$(ALBERTA_LDFLAGS) \$(ALBERTA_LIBS) \\
	\$(AMIRAMESH_LDFLAGS) \$(AMIRAMESH_LIBS) \\
	\$(UG_LDFLAGS) \$(UG_LIBS) \\
	\$(DUNEMPILIBS)	\\
	\$(LDADD)
${CMODULE}_LDFLAGS = \$(AM_LDFLAGS) \\
	\$(DUNEMPILDFLAGS) \\
	\$(UG_LDFLAGS) \\
	\$(AMIRAMESH_LDFLAGS) \\
	\$(ALBERTA_LDFLAGS) \\
	\$(ALUGRID_LDFLAGS) \\
	\$(DUNE_LDFLAGS)

# don't follow the full GNU-standard
# we need automake 1.5
AUTOMAKE_OPTIONS = foreign 1.5

# pass most important options when "make distcheck" is used
DISTCHECK_CONFIGURE_FLAGS = $DISTCHECK_CONFIGURE_FLAGS CXX="\$(CXX)" CC="\$(CC)"

include \$(top_srcdir)/am/global-rules

M_DELIM

################## PROJECT.CC ##################
echo "- $PROJECT/src/$CMODULE.cc"
cat> "$PROJECT/src/$CMODULE.cc" << CC_DELIM
#ifdef HAVE_CONFIG_H
# include "config.h"     
#endif
#include <iostream>
#include"dune/common/mpihelper.hh" // An initializer of MPI
#include"dune/common/exceptions.hh" // We use exceptions

int main(int argc, char** argv)
{
  try{
    //Maybe initialize Mpi
    Dune::MPIHelper& helper = Dune::MPIHelper::instance(argc, argv);
    std::cout << "Hello World! This is ${PROJECT}." << std::endl;
    if(Dune::MPIHelper::isFake)
      std::cout<< "This is a sequential program." << std::endl;
    else
      std::cout<<"I am rank "<<helper.rank()<<" of "<<helper.size()
        <<" processes!"<<std::endl;
    return 0;
  }
  catch (Dune::Exception &e){
    std::cerr << "Dune reported error: " << e << std::endl;
  }
  catch (...){
    std::cerr << "Unknown exception thrown!" << std::endl;
  }
}
CC_DELIM

################## M4/MAKEFILE ####################
mkdir "$PROJECT/m4"
echo "- $PROJECT/m4/Makefile.am"
cat> "$PROJECT/m4/Makefile.am" << CC_DELIM
M4FILES = $MODULE.m4

aclocaldir = \$(datadir)/aclocal
aclocal_DATA = \$(M4FILES)

EXTRA_DIST = \$(M4FILES)

include \$(top_srcdir)/am/global-rules
CC_DELIM

################## M4/PROJECT.M4 ####################
M4_MODULE=`echo $MODULE | tr '[a-z-]' '[A-Z_]'`
echo "- $PROJECT/m4/$MODULE.m4"
cat> "$PROJECT/m4/$MODULE.m4" << CC_DELIM
dnl -*- autoconf -*-
# Macros needed to find $MODULE and dependent libraries.  They are called by
# the macros in \${top_src_dir}/dependencies.m4, which is generated by
# "dunecontrol autogen"

# Additional checks needed to build $MODULE
# This macro should be invoked by every module which depends on $MODULE, as
# well as by $MODULE itself
AC_DEFUN([${M4_MODULE}_CHECKS])

# Additional checks needed to find $MODULE
# This macro should be invoked by every module which depends on $MODULE, but
# not by $MODULE itself
AC_DEFUN([${M4_MODULE}_CHECK_MODULE],
[
  DUNE_CHECK_MODULES([$MODULE],[$NAME/$NAME.hh])
])
CC_DELIM


################################################################
################## The headers subdirectory ####################
################################################################

echo "- $PROJECT/dune/$NAME"
mkdir "$PROJECT/dune"
mkdir "$PROJECT/dune/$NAME"

################## dune/Makefile.am ####################
echo "- $PROJECT/dune/Makefile.am"
cat> $PROJECT/dune/Makefile.am <<EOF
SUBDIRS = $NAME

include \$(top_srcdir)/am/global-rules
EOF

################## dune/$NAME/Makefile.am ##############
echo "- $PROJECT/dune/$NAME/Makefile.am"
cat> $PROJECT/dune/$NAME/Makefile.am <<EOF
${NAME}includedir = \$(includedir)/dune/${NAME}
${NAME}include_HEADERS = ${NAME}.hh

include \$(top_srcdir)/am/global-rules
EOF

################## dune/$NAME/$NAME.hh #################
echo "- $PROJECT/dune/$NAME/$NAME.hh"
cat> $PROJECT/dune/$NAME/$NAME.hh <<EOF
#ifndef DUNE_$NAME.hh
#define DUNE_$NAME.hh

// add your classes here

#endif // DUNE_$NAME.hh
EOF


###############################################################
################## The doc subdirectory ####################
###############################################################

mkdir "$PROJECT/doc"

################## doc/Makefile.am ####################
echo "- $PROJECT/doc/Makefile.am"
cat> "$PROJECT/doc/Makefile.am" << CC_DELIM

SUBDIRS = doxygen
CURDIR = doc
BASEDIR = ..

# add list of html files to generate from wml
PAGES=

docdir=\$(datadir)/doc/${PROJECT}

include \$(top_srcdir)/am/webstuff
include \$(top_srcdir)/am/global-rules
CC_DELIM

###############################################################
############### The doc/doxygen subdirectory ##################
###############################################################

mkdir "$PROJECT/doc/doxygen"


#################### basic Doxylocal ##########################

echo "- $PROJECT/doc/doxygen/Doxylocal"
if [ "x`which doxygen`" == "x" ]; then
    echo "Doxygen is not installed! Your documentation will not work without."
fi
# Where to search and which files to use
cat> $PROJECT/doc/doxygen/Doxylocal << CC_DELIM
# This file contains local changes to the doxygen configuration
# please us '+=' to add file/directories to the lists

# The INPUT tag can be used to specify the files and/or directories that contain
# documented source files. You may enter file names like "myfile.cpp" or
# directories like "/usr/src/myproject". Separate the files or directories
# with spaces.

INPUT                 += @top_srcdir@/dune/
# see e.g. dune-grid for the examples of mainpage and modules
# INPUT                 += @srcdir@/mainpage \
#                          @srcdir@/modules

# The EXCLUDE tag can be used to specify files and/or directories that should
# excluded from the INPUT source files. This way you can easily exclude a
# subdirectory from a directory tree whose root is specified with the INPUT tag.

# EXCLUDE               += @top_srcdir@/dune/$NAME/test

# The EXAMPLE_PATH tag can be used to specify one or more files or
# directories that contain example code fragments that are included (see
# the \include command).

# EXAMPLE_PATH          += @top_srcdir@/src

# The IMAGE_PATH tag can be used to specify one or more files or
# directories that contain image that are included in the documentation (see
# the \image command).

# IMAGE_PATH            += @top_srcdir@/dune/$NAME/pics

CC_DELIM

################# doc/doxygen/Makefile.am #####################

echo "- $PROJECT/doc/doxygen/Makefile.am"
cat> "$PROJECT/doc/doxygen/Makefile.am" << CC_DELIM

BASEDIR=../..
CURDIR=doc/doxygen

include \$(top_srcdir)/am/doxygen
include \$(top_srcdir)/am/global-rules

CC_DELIM

## done
echo "done."
echo "------------------------------------------"
echo "For further details read the Dune Buildsystem-Howto:"
echo "http://www.dune-project.org/doc/buildsystem/buildsystem.pdf"