#!/bin/bash
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | Copyright (C) 2018 OpenCFD Ltd.
#    \\/     M anipulation  |
#-------------------------------------------------------------------------------
#                           | Copyright (C) 2011-2016 OpenFOAM Foundation
#------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM.
#
#     OpenFOAM is free software: you can redistribute it and/or modify it
#     under the terms of the GNU General Public License as published by
#     the Free Software Foundation, either version 3 of the License, or
#     (at your option) any later version.
#
#     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
#     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
#     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
#     for more details.
#
#     You should have received a copy of the GNU General Public License
#     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
#
# Script
#     wmakeLnIncludeAll
#
# Usage
#     wmakeLnIncludeAll [dir1 .. dirN]
#
# Description
#     Find directories with a 'Make/files' containing a 'LIB =' directive
#     and execute 'wmakeLnInclude' for each one
#
#------------------------------------------------------------------------------
Script=${0##*/}

usage() {
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    cat<<USAGE

Usage: $Script [OPTION] [dir1 .. dirN]

options:
  -j                Compile using all local cores/hyperthreads
  -jN or -j N       Compile using N cores/hyperthreads
  -h | -help        Print the usage

Find directories with a 'Make/files' containing a 'LIB =' directive
and execute 'wmakeLnInclude -update' for each one

USAGE
    exit 1
}


#------------------------------------------------------------------------------
# Parse arguments and options
#------------------------------------------------------------------------------

findName=lnInclude
nCores=0

# Default 'wmakeLnInclude' option
unset wmLnOpt

while [ "$#" -gt 0 ]
do
    case "$1" in
        -h | -help*)
            usage
            ;;
        -u | -update)
            wmLnOpt="-update"
            ;;
        # Parallel execution on WM_NCOMPPROCS cores
        -j)
            nCores=${WM_NCOMPPROCS:-0}
            test $# -ge 2 && expr $2 + 1 > /dev/null 2>&1 \
                && shift && nCores=$1

            [ "$nCores" = 0 ] && nCores=1
            ;;
        # Parallel compilation on specified number of cores
        -j[1-9]*)
            nCores=${1#-j}
            ;;
        -*)
            usage "unknown option: '$1'"
            ;;
        *)
            break
            ;;
    esac
    shift
done

# Default search is from CWD, with special handling of the top-level
# project directory: {applications,src} directories
if [ "$#" -eq 0 ]
then
    if wmakeCheckPwd "$WM_PROJECT_DIR" 2>/dev/null
    then
        set -- applications src
    else
        set -- .
    fi
fi

if [ "$nCores" -gt 0 ]
then
    echo "$Script: starting wmakeLnInclude processes on $nCores cores"
else
    echo "$Script: running wmakeLnInclude"
fi

for checkDir
do
    if [ -d $checkDir ]
    then
        echo "    searching $checkDir for 'Make' directories"
    else
        echo "    skipping non-dir $checkDir"
        continue
    fi

    find $checkDir -depth -name Make -type d -print | while read MakeDir
    do
        topDir=${MakeDir%/Make}    # trim /Make from the end
        if [ -d "$topDir" ]
        then
            if grep -qe '^ *LIB *=' "$MakeDir/files" 2>/dev/null
            then
                # If running in parallel start wmakeLnInclude on nCores
                # and more as the cores become free
                if [ "$nCores" -gt 0 ]
                then
                    joblist=($(jobs -p))
                    while (( ${#joblist[*]} > $nCores ))
                    do
                        # When the job limit is reached wait for a job to finish
                        wait -n
                        joblist=($(jobs -p))
                    done
                    wmakeLnInclude $wmLnOpt $topDir &
                else
                    wmakeLnInclude $wmLnOpt $topDir
                fi
            elif [ -d "$topDir/lnInclude" ]
            then
                echo "    removing spurious $topDir/lnInclude"
                rm -rf "$topDir/lnInclude"
            fi
        fi
    done
done

if [ "$nCores" -gt 0 ]
then
    # Wait for all of the wmakeLnInclude jobs to finish
    wait

    # Synchronize the file system to ensure that all of the links exist
    # before compilation
    # sync
    sleep 2
fi

exit 0 # clean exit

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