#!/bin/sh
cd "${0%/*}" || exit    # Run from this directory
[ -d "$WM_PROJECT_DIR" ] || {
    echo "Error (${0##*/}) : no \$WM_PROJECT_DIR found"
    echo "    Check your OpenFOAM environment and installation"
    echo "    WM_PROJECT_DIR=$WM_PROJECT_DIR"
    exit 1
}

usage() {
    exec 1>&2
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    cat<<USAGE

usage: ${0##*/} [OPTION] [dir1 .. dirN]
options:
  -config name      use alternative doxygen config
  -dir    name      process given directory name directly
  -online           use links to the Github repositories instead of the
                    local source code
  -help

Run doxygen on OpenFOAM sources, or on specified directories only.

USAGE
    exit 1
}


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

defineURL() {
    WEB_PATH="https://develop.openfoam.com"
    FOAM_REPO_VERSION="$WM_PROJECT-plus"

    case "$WM_PROJECT_VERSION" in
    v[1-9][.0-9]*)
        FOAM_REPO_TAG="$WM_PROJECT-$WM_PROJECT_VERSION"
        ;;
    *)
        FOAM_REPO_TAG="master"
        ;;
    esac

    export FOAM_BASE_REPO="$WEB_PATH/Development/$FOAM_REPO_VERSION"
    export FOAM_ONLINE_REPO="$FOAM_BASE_REPO/blob/${FOAM_REPO_TAG}"
}


unset configName dirNames

# Parse options
while [ "$#" -gt 0 ]
do
    case "$1" in
    -h | -help*)
        usage
        ;;
    -config)
        configName="$2"
        [ -f "$configName" ] || {
            # No such file. Try some common alternatives
            for ending in $configName ".$configName" "-$configName"
            do
                if [ -f "Doxyfile$ending" ]
                then
                    configName="Doxyfile$ending"
                    break
                fi
            done
        }
        [ -f "$configName" ] || {
            echo "Could not resolve Doxyfile config: $configName" 1>&2
            exit 1
        }
        shift
        ;;
    -dir)
        shift
        if [ -d "$1" ]
        then
            dirNames="$dirNames $1"
        else
            echo "Could not resolve input directory: $1" 1>&2
            exit 1
        fi
        ;;
    -online)
        defineURL
        ;;
    -*)
        usage "unknown option: '$1'"
        ;;

    *)  # dirName
        if [ -d "$1" ]
        then
            dirNames="$dirNames $1"
        else
            echo "Could not resolve input directory: $1" 1>&2
        fi
        ;;
    *)
        usage "unknown option/argument: '$1'"
        ;;
    esac
    shift
done


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

rm -rf latex man

# Remove html directory in background
mv html html-stagedRemove$$ 2>/dev/null
rm -rf html-stagedRemove$$ 2>/dev/null &

# Ensure that created files are readable by everyone
umask 22

if [ -n "$dirNames" ]
then
    (
        cat ${configName:-Doxyfile}
        echo "INPUT = $dirNames"
    ) | doxygen -
else
    doxygen $configName
fi

# Fix permissions (NB: '+X' and not '+x'!)
chmod -R a+rX html latex man 2>/dev/null

echo
echo "Done doxygen"
echo

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