#!/bin/bash
#

set -e

## This script is invoked by Xcode external targets.
##
## We must guarantee no jobserver is passed through since the file-descriptors
## have been clobbered by Xcode. If this is not done then make behaves as if
## it is allowed to run an infinite number of jobs.
##
MAKEFLAGS=
MFLAGS=

## sanity check - the build system only supports 1 arch at a time
archcount=`echo $ARCHS | awk '{ print NF }'`
if [ "$archcount" -ne 1 ]; then
    echo "*********************************************************************"
    echo "***"
    echo "*** ERROR: invalid number of architectures: $ARCHS"
    echo "*** This build system builds one (1) archtecture at a time."
    echo "***"
    echo "*********************************************************************"
    exit 1
fi

## compute if re/configure necessary
if [ $EXTERNAL_METHOD != 'xcode' ]; then
    reconfigure="terminal -> Xcode"
elif [ ! -f $EXTERNAL_BUILD/GNUmakefile ]; then
    reconfigure="no configuration present"
elif [ $EXTERNAL_SRC/make/configure.py -nt $EXTERNAL_BUILD/GNUmakefile ]; then
    reconfigure="configure script was updated"
else
    reconfigure=
fi

## perform re/configure
if [ -n "$reconfigure" ]; then
    echo "reconfiguring ($reconfigure)"

    case "$CONFIGURATION" in
    debug*)
        debug="--debug=max --optimize=none"
        ;;
    standard*|*)
        debug=
        ;;
    esac

    ## invoke configure with (hidden) option which indicates conf performed by xcode
    (set -x; $EXTERNAL_SRC/configure --force $EXTERNAL_CONFARGS \
        --build=$EXTERNAL_BUILD --arch=$ARCHS $debug --conf-method=xcode PATH=$PATH )
fi

## compute goals; these correlate with TARGET_NAME and ACTION from Xcode
spec="$TARGET_NAME:$ACTION"
echo "env specification: $spec"
case "$spec" in
    contrib:clean)
        goals=contrib.xclean
        ;;
    contrib:*)
        goals=contrib.install
        ;;
    external:clean)
        goals=clean
        ;;
    external:*)
        if [ -z "$EXTERNAL_GOALS" ]; then
            goals=build
        else
            goals="$EXTERNAL_GOALS"
        fi
        ;;
    libhb:clean)
        goals=libhb.clean
        ;;
    libhb:*)
        goals=libhb.build
        ;;
    *)
        echo "ERROR: invalid env specification: $spec"
        exit 1
        ;;
esac

## safeguard against passing blank value which would result in unlimited jobs
if [ -z "$EXTERNAL_JOBS" ]; then
    jobs=
else
    jobs=--jobs=$EXTERNAL_JOBS
fi

## log environment as provided by Xcode
logdir=$EXTERNAL_BUILD/log
if [ ! -d $logdir ]; then
    mkdir -p $logdir
fi
env | sort > $logdir/xcodemake.env.txt

## pull the trigger
## must set BUILD.method != terminal to prevent inifinite recursion
set -x
exec make -C $EXTERNAL_BUILD BUILD.method=xcode $jobs $goals $EXTERNAL_VARS