#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | www.openfoam.com
#    \\/     M anipulation  |
#------------------------------------------------------------------------------
#     Copyright (C) 2020 OpenCFD Ltd.
#------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM, distributed under GPL-3.0-or-later.
#
# Script
#     install-dirs
#
# Example usage
#     install-dirs -prefix=/opt/openfoam/openfoamVER -core
#
# Description
#     Simple installer to copy architecture-independent directories.
#
#------------------------------------------------------------------------------
printHelp() {
    cat<<USAGE

Usage: ${0##*/} [OPTION]

input options:
  -source=SOURCE          Source directory
                          [\$WM_PROJECT_DIR ${WM_PROJECT_DIR:-''}]
  -platform=PLATFORM      OpenFOAM platform name [\$WM_OPTIONS ${WM_OPTIONS:-''}]
  -foam-mpi=FOAM_MPI      OpenFOAM mpi name [\$FOAM_MPI ${FOAM_MPI:-''}]

target options:
  -prefix=PREFIX          Top-level installation directory in PREFIX ['']

selections:
  -[no-]common            [do not] install (bin, etc, META-INFO)
  -[no-]devel             [do not] install (applications, src, wmake)
  -[no-]doc               [do not] install (doc)
  -[no-]tut               [do not] install (tutorials)
  -no-app, -no-apps       do not install (applications)
  -no-src                 do not install (src)
  -no-wmake               do not install (wmake)

bundled selections:
  -core                   Select: -common -devel
  -default                Select: -common -devel -doc -tut

tuning options:
  -collate                Collate modules (doc, tutorials)
  -collate-doc            Collate modules (doc) into doc/modules
  -collate-tut            Collate modules (tutorials) into tutorials/modules

general options:
  -dry-run, -n            Do not perform any operations
  -force, -f              Ignored
  -verbose, -v            Additional verbosity
  -help                   Print the help and exit


Simple installer to copy OpenFOAM non-binary directories.

Example,
    ${0##*/} -prefix=/opt/openfoamVER

USAGE
    exit 0  # A clean exit
}

unset optDryRun hadError
# 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
}

# Report error and exit
warnOrDie()
{
    if [ -n "$optDryRun" ]
    then
        hadError=true
        while [ "$#" -ge 1 ]; do echo "Error: $1" 1>&2; shift; done
    else
        die "$@"
    fi
}


# Get the option's value (argument), or die on missing or empty value
# $1 option=value
getOptionValue()
{
    local value="${1#*=}"
    # Remove any surrounding double quotes
    value="${value%\"}"
    value="${value#\"}"

    [ -n "$value" ] || die "'${1%=}' option requires a value"
    echo "$value"
}

# Test for '-no-' or '-without-' prefix. Return "false" or "true"
# $1 option
# [$2] truth value <true>
getBoolOption()
{
    case "$1" in
    (-no-* | -without-*) echo "false" ;;
    (*) echo "${2:-true}" ;;
    esac
}


#-------------------------------------------------------------------------------
# Defaults from current OpenFOAM environment
sourceDir="$WM_PROJECT_DIR"
platform="$WM_OPTIONS"
foam_mpi="$FOAM_MPI"

unset install_common install_devel
unset install_app install_src install_wmake
unset install_doc optCollate_doc
unset install_tut optCollate_tut
unset optCollate

unset prefix exec_prefix bindir libdir libdir_mpi optVerbose

# Parse options
while [ "$#" -gt 0 ]
do
    case "$1" in
    -h | -help*)    printHelp ;;
    -n | -dry-run)  optDryRun="(dry-run) " ;;
    -v | -verbose)  optVerbose=true ;;
    -f | -force)    echo "Ignored option: ${1%%=*}" 1>&2 ;;

    # Inputs
    -source=*)      sourceDir="$(getOptionValue "$1")" ;;
    -platform=*)    echo "Ignored option: ${1%%=*}" 1>&2 ;;
    -foam-mpi=*)    echo "Ignored option: ${1%%=*}" 1>&2 ;;

    # Targets
    -prefix=*)      prefix="$(getOptionValue "$1")" ;;
    -exec-prefix=*) echo "Ignored option: ${1%%=*}" 1>&2 ;;

    # Selections
    -common | -no-common)   install_common="$(getBoolOption "$1")" ;;
    -devel | -no-devel)     install_devel="$(getBoolOption "$1")" ;;
    -doc | -no-doc)         install_doc="$(getBoolOption "$1")" ;;
    -tut | -no-tut)         install_tut="$(getBoolOption "$1")" ;;
    -no-app | -no-apps)     install_app="$(getBoolOption "$1")" ;;
    -no-src)                install_src="$(getBoolOption "$1")" ;;
    -no-wmake)              install_wmake="$(getBoolOption "$1")" ;;

    -core)
        install_common=true
        install_devel=true
        ;;

    -default | -all)
        [ "$1" = "-all" ] && echo "Compat: treat $1 like -default" 1>&2
        install_common=true
        install_devel=true
        install_doc=true
        install_tut=true
        ;;

    -collate | -no-collate)
        optCollate="$(getBoolOption "$1")"
        if [ "${optCollate:-false}" = false ]
        then
            unset optCollate optCollate_doc optCollate_tut
        fi
        ;;
    -collate-doc)   optCollate_doc=true ;;
    -collate-tut)   optCollate_tut=true ;;

    (*)  die "Unknown option/argument: $1" ;;
    esac
    shift
done

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

[ "${install_common:-false}" = false ] && unset install_common
if [ "${install_devel:-false}" = false ]
then
    unset install_devel install_app install_src install_wmake
fi

if [ "${install_doc:-false}" = false ]
then
    unset install_doc
elif [ "$optCollate_doc" = true ] || [ "$optCollate" = true ]
then
    install_doc=collate
fi

if [ "${install_tut:-false}" = false ]
then
    unset install_tut
elif [ "$optCollate_tut" = true ] || [ "$optCollate" = true ]
then
    install_tut=collate
fi


# Input checks
[ -d "$sourceDir" ] || warnOrDie "Invalid -source directory: $sourceDir"

# Installation sanity check
[ -n "$prefix" ] || warnOrDie "Must specify -prefix"

if [ -n "$hadError" ]
then
    echo "Errors encounters in dry-run. Stopping" 1>&2
    exit 1
fi

if [ -z "${install_common}${install_devel}${install_doc}${install_tut}" ]
then
    exec 1>&2
    echo "Nothing specified to install"
    echo
    echo "See '${0##*/} -help' for usage"
    echo
    exit 0  # Treat as not an error
fi

# Report settings
echo "Preparing install with the following parameters" 1>&2
echo "source:" 1>&2
echo "    directory   $sourceDir" 1>&2
echo 1>&2
echo "target" 1>&2
echo "    prefix      ${prefix-[]}" 1>&2
##echo "    binary      ${install_binary:-[disabled]}" 1>&2
echo "    common      ${install_common:-[disabled]}" 1>&2
echo -n "    devel       " 1>&2
if [ -n "$install_devel" ]
then
    echo -n "true" 1>&2
    [ "$install_app" = false ] && echo -n " [app=disabled]" 1>&2
    [ "$install_src" = false ] && echo -n " [src=disabled]" 1>&2
    [ "$install_wmake" = false ] && echo -n " [wmake=disabled]" 1>&2
    echo 1>&2
else
    echo "[disabled]" 1>&2
fi
echo "    doc         ${install_doc:-[disabled]}" 1>&2
echo "    tut         ${install_tut:-[disabled]}" 1>&2
echo 1>&2


#------------------------------------------------------------------------------
# Proper umask
umask 022

# The commands
copy_cmd="cp -a ${optVerbose:+-v}"
mkdir_cmd="mkdir -p"

if [ -n "$optDryRun" ]
then
    if [ -n "$optVerbose" ]
    then
        copy_cmd="echo cp -a"
        mkdir_cmd="echo mkdir -p"
    else
        copy_cmd="true"
        mkdir_cmd="true"
    fi
fi


# Copy file or directory to <prefix>
doCopy()
{
    $mkdir_cmd "$prefix" 2>/dev/null

    for i in "$@"
    do
        if [ -e "$sourceDir/$i" ]
        then
            $copy_cmd "$sourceDir/$i" "$prefix"
            nCopied="x$nCopied"
        else
            echo "Missing? $sourceDir/$i" 1>&2
        fi
    done
    echo "${optDryRun}${#nCopied} items copied" 1>&2
}



# Collate (doc | tutorials)
# Eg,
#    modules/{NAME}/tutorials
# => tutorials/modules/{NAME}
collateModuleFiles()
{
    local subDir="$1"
    local subTarget="$prefix/$subDir/modules"

    if [ -d "$sourceDir/modules" ]
    then
    (
        cd "$sourceDir/modules" || exit

        $mkdir_cmd "$subTarget"

        for i in $(find . -mindepth 2 -maxdepth 2 -name "$subDir" -type d)
        do
            $mkdir_cmd "$subTarget/${i%/*}"
            $copy_cmd "$i"/*  "$subTarget/${i%/*}"
        done
    )
    fi
}


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

# common
# ----
message="${optDryRun}Install common:"
if [ -n "$install_common" ]
then
    echo "${message} bin etc META-INFO" 1>&2
    doCopy bin etc META-INFO
else
    echo "${message} [disabled]" 1>&2
fi
# ----


# develop (or source)
# ----
message="${optDryRun}Install devel:" 1>&2
unset dirNames blockMessage
if [ -n "$install_devel" ]
then
    if [ "$install_wmake" = false ]
    then
        blockMessage="$blockMessage [wmake=disabled]"
    else
        dirNames="$dirNames wmake"
    fi
    if [ "$install_src" = false ]
    then
        blockMessage="$blockMessage [src=disabled]"
    else
        dirNames="$dirNames src"
    fi
    if [ "$install_app" = false ]
    then
        blockMessage="$blockMessage [app=disabled]"
    else
        dirNames="$dirNames applications"
    fi
fi

if [ -n "$dirNames" ]
then
    echo "${message}${dirNames}${blockMessage}" 1>&2
    doCopy $dirNames  # Unquoted - uses word splitting
else
    echo "${message} [disabled]" 1>&2
fi
# ----


# doc
# ----
message="${optDryRun}Install doc:" 1>&2
if [ -n "$install_doc" ]
then
    echo "${message}" 1>&2
    doCopy doc

    if [ "$install_doc" = collate ]
    then
        echo "${optDryRun}Collate module doc:" 1>&2
        collateModuleFiles doc
    fi
else
    echo "${message} [disabled]" 1>&2
fi
# ----


# tutorials
# ----
message="${optDryRun}Install tutorials:" 1>&2
if [ -n "$install_tut" ]
then
    echo "${message}" 1>&2
    doCopy tutorials

    if [ "$install_tut" = collate ]
    then
        echo "${optDryRun}Collate module tutorials:" 1>&2
        collateModuleFiles tutorials
    fi
else
    echo "${message} [disabled]" 1>&2
fi
# ----


if [ -n "$optDryRun" ]
then
    [ -n "$optVerbose" ] && echo 1>&2
    echo "${optDryRun}Done" 1>&2
fi


exit 0 # clean exit

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