#!/bin/bash

# Copyright (c) 2015-2016 Sandro Mani <manisandro@gmail.com>

#

# Permission is hereby granted, free of charge, to any person obtaining a copy

# of this software and associated documentation files (the "Software"), to deal

# in the Software without restriction, including without limitation the rights

# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

# copies of the Software, and to permit persons to whom the Software is

# furnished to do so, subject to the following conditions:

#

# The above copyright notice and this permission notice shall be included in

# all copies or substantial portions of the Software.

#

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

# THE SOFTWARE

buildroot="$RPM_BUILD_ROOT"

if [ ! -d "$buildroot" ]; then

  >&2 echo "Invalid buildroot"

  exit 1

fi

# Remaining arguments are passed to elfdeps

shift

elfdepsargs="$@"

# Search for all MPI implementations:

# - Search all modules which start with mpi

# - For each module, store $MPI_DIR -> $MPI_COMPILER in assoc. array

declare -A mpi_compiler_for_dir

if [ -e /etc/profile.d/modules.sh ]; then

  . /etc/profile.d/modules.sh;

  # Add moduledirs in buildroot also for cases where an MPI implementation

  # package is being built, meaning that its module files are not yet installed

  IFS=':' read -ra _MODULEPATH <<< "$MODULEPATH"

  for i in "${!_MODULEPATH[@]}"; do

    _MODULEPATH[$i]=$buildroot${_MODULEPATH[$i]}

  done

  export MODULEPATH="$MODULEPATH:$(IFS=:; echo "${_MODULEPATH[*]}")"

  for module in $(module -t avail 2>&1 | grep "^mpi/"); do

    module load $module

    mpi_compiler_for_dir[${MPI_HOME}]=${MPI_COMPILER}

    mpi_compiler_for_dir[${MPI_FORTRAN_MOD_DIR}]=${MPI_COMPILER}

    mpi_compiler_for_dir[${MPI_PYTHON2_SITEARCH}]=${MPI_COMPILER}

    mpi_compiler_for_dir[${MPI_PYTHON3_SITEARCH}]=${MPI_COMPILER}

    module unload $module

  done

fi

# Read file list from stdin

filelist=$(sed "s/['\"]/\\\&/g")

# List provides:

if [ -x /usr/lib/rpm/elfdeps -a -n "$filelist" ]; then

  for file in $(echo $filelist | tr '[:blank:]' \\n); do

    # Get the default provides string from elfdeps

    prov=$(echo $file | /usr/lib/rpm/elfdeps --provides $elfdepsargs)

    if [ -z "$prov" ]; then

      continue

    fi

    # If the path to the scanned binary starts with a known mpi binary directory,

    # append the corresponding ($MPI_COMPILER) to the provides string

    for mpi_dir in "${!mpi_compiler_for_dir[@]}"; do

      if [[ "$file" == "$buildroot$mpi_dir"* ]]; then

        prov="${prov}(${mpi_compiler_for_dir[$mpi_dir]})"

        break

      fi

    done

    echo "$prov"

  done

fi