#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | www.openfoam.com
#    \\/     M anipulation  |
#------------------------------------------------------------------------------
#     Copyright (C) 2016 OpenCFD Ltd.
#------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM, distributed under GPL-3.0-or-later.
#
# Script
#     foamGrepExeTargets
#
# Description
#     Trivial script to lists all "EXE =" targets for solvers and utilities.
#     Uses git for the grep operation.
#
# Examples
#     Confirm that all available EXE targets have actually been created:
#
#       foamGrepExeTargets           > targets-available
#       foamGrepExeTargets -appbin   > targets-created
#       diff -uw targets-available targets-created
#
#------------------------------------------------------------------------------
usage() {
    exec 1>&2
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    cat<<USAGE
usage: ${0##*/}
  -appbin       list contents of \$FOAM_APPBIN (no git required)
  -help

List available EXE= targets. Requires git.

USAGE
    exit 1
}

# Report error and exit
die()
{
    exec 1>&2
    echo
    echo "Error encountered:"
    while [ "$#" -ge 1 ]; do echo "    $1"; shift; done
    echo
    echo "See '${0##*/} -help' for usage"
    echo
    exit 1
}

#------------------------------------------------------------------------------

unset projectdir
for i in "./.git" "$WM_PROJECT_DIR/.git"
do
    if [ -d "$i" ]
    then
        projectdir="${i%/*}"
        break
    fi
done


# Parse options
while [ "$#" -gt 0 ]
do
    case "$1" in
    -h | -help*)
        usage
        ;;

    -appbin)
        test -n "$FOAM_APPBIN" && cd "$FOAM_APPBIN" || \
            die "FOAM_APPBIN is not valid"

        /bin/ls -1
        exit 0
        ;;
    *)
        die "unknown option/argument: '$1'"
        ;;
    esac
done

# Default is grep (via git)

[ -d "$projectdir" ] || \
    die "Cannot locate OpenFOAM project, or it does not have a git directory"


# Run from top-level directory - otherwise the grep is quite difficult
# A version with 'find' is likewise possible, but not as fast.

# Check 'src' too, in case somehow something is there as well.
(
    cd "$projectdir" && \
    git grep --cached -P '^\s*EXE\s*=' \
        applications/solvers \
        applications/utilities \
        src
) | sed -e 's@.*/@@' | sort | uniq

# -----------------------------------------------------------------------------