#!/bin/sh
usage(){
    >&2 cat<<END


lmk-run
-------
This script is part of <https://github.com/poikilos/EnlivenMinetest>.

Does all of the following
- Gets and unzips linux-minetest-kit.zip if possible if there is no
  linux-minetest-kit in the current working directory.
- Compile libraries if there is no linux-minetest-kit/toolstree.
- Compile minetest if there is no exe matching the specified options.

Suggested setup for a user in the sudo group:
'''
chgrp sudo /opt
# continue to Further setup
'''

Suggested setup for minebest user:
'''
chgrp minebest /opt
# continue to Further setup
'''

Further setup:
'''
chmod g+w /opt
cd /opt
ln -s ~/git/EnlivenMinetest/utilities/lmk-run
ln -s ~/git/EnlivenMinetest/utilities/get-lmk.sh
ln -s ~/git/EnlivenMinetest/utilities/fix-lmk-permissions.sh
'''

Examples:
lmk-run classic client ~/minetest/worlds/center
# ^ creates classic client and opens the world ~/minetest/worlds/center
#   - requires that the game is in linux-minetest-kit/minetest/games
#     that has the gameid matching the one in the world (same goes for
#     any of the automatically checked world paths).

lmk-run classic server
# ^ creates minetestserver

lmk-run finetest server
# ^ creates finetestserver

lmk-run trolltest server
# ^ creates trolltestserver

lmk-run classic client
# ^ creates minetest

lmk-run finetest client
# ^ creates finetest

lmk-run trolltest client
# ^ creates trolltest



END
}
if [ "x$1" = "x--help" ]; then
    usage
    exit 0
fi
PREV_DIR="`pwd`"
if [ "x$1" != "x" ]; then
    LMK_MODE="$1"
fi
if [ "x$LMK_MODE" = "x" ]; then
    usage
    >&2 echo "[lmk-run] Error: (or LMK_MODE in environment). It should be classic, finetest, or trolltest."
    exit 1
fi
_RAW_APP="$APP"
EXE_NAME=

if [ "x$LMK_MODE" = "xclassic" ]; then
    EXE_NAME="minetest"
elif [ "x$LMK_MODE" = "xfinetest" ]; then
    EXE_NAME="finetest"
elif [ "x$LMK_MODE" = "xtrolltest" ]; then
    EXE_NAME="trolltest"
fi

if [ "x$2" != "x" ]; then
    APP="$2"
    echo "[lmk-run] set APP to $2"
fi

APP_ARG=
if [ "x$APP" = "xclient" ]; then
    APP_ARG="--client"
elif [ "x$APP" = "xserver" ]; then
    APP_ARG="--server"
    EXE_NAME="${EXE_NAME}server"
else
    usage
    echo "[lmk-run] Error: You must specify client or server after mode (APP=$APP, \$2=$2)."
    exit 1
fi

echo "[lmk-run] building $EXE_NAME, or running if already exists"
if [ "x$APP" = "x" ]; then
    usage
    >&2 echo "[lmk-run] Error: specify client or server after the mode."
    exit 1
fi



if [ ! -d "linux-minetest-kit" ]; then
    echo "[lmk-run] Running ./get-lmk.sh since there is no linux-minetest-kit directory in `pwd`..."
    ./get-lmk.sh
    code=$?
    exit $code
fi
cd linux-minetest-kit
if [ $? -ne 0 ]; then
    >&2 echo "[lmk-run] Error: cd linux-minetest-kit failed in `pwd`. Try running: ./get-lmk.sh"
    exit 1
fi
if [ ! -f "mtcompile-program.pl" ]; then
    >&2 echo "[lmk-run] Error: missing mtcompile-program.pl in `pwd`"
    exit 1
fi
$PRE_CMD="sudo -u minebest"
$PRE_CMD ls > /dev/null
if [ $? -ne 0 ]; then
    PRE_CMD=""
    >&2 echo "[lmk-run] Warning: running as $USER since 'sudo -u minebest' failed."
fi
if [ ! -d toolstree ]; then
    $PRE_CMD bash -e mtcompile-libraries.sh build
    if [ $? -ne 0 ]; then
        >&2 echo "[lmk-run] Error: '$PRE_CMD bash -e mtcompile-libraries.sh' failed in `pwd`."
        exit 1
    fi
else
    echo "[lmk-run] using existing toolstree in `pwd`"
fi

if [ ! -f minetest/bin/$EXE_NAME ]; then
    echo "[lmk-run] compiling..."
    $PRE_CMD perl mtcompile-program.pl build --$LMK_MODE $APP_ARG
    code=$?
    if [ $code -ne 0 ]; then
        extra_msg=""
        if [ -f "minetest/bin/$EXE_NAME" ]; then
            extra_msg=", but minetest/bin/$EXE_NAME exists, so you can probably run lmk-run again and it will probably run (after syncing to the tmp world as usual)."
        fi
        >&2 echo "[lmk-run] Error: '$PRE_CMD perl mtcompile-program.pl build --$LMK_MODE  $APP_ARG' failed in `pwd` with code $code"
        exit 1
    fi
else
    echo "[lmk-run] using existing `pwd`/minetest/bin/$EXE_NAME"
fi
cd minetest/bin
if [ $? -ne 0 ]; then
    PRE_CMD=""
    >&2 echo "[lmk-run] 'cd minebest/bin' failed in `pwd`."
fi
#if "x$APP" = "xserver" ]; then
echo "* Looking for a test world to copy..."
if [ "x$SRC_WORLD" = "x" ]; then
    SRC_WORLD="$3"
else
    SRC_WORLD=
fi
if [ "x$SRC_WORLD" = "x" ]; then
    for dir in ~/minetest-220509/worlds/bg190406 /home/owner/bg190406
    do
        printf "* checking for \"$dir\"..."
        if [ -d $dir ]; then
            SRC_WORLD="$dir"
            break
        fi
    done
fi
if [ "x$SRC_WORLD" = "x" ]; then
    echo "No known test world was found. Try making a small world first, and specify it as the 3rd parameter or set SRC_WORLD in the environment. Note that the gameid in the file must exist."
    exit 1
else
    echo "[lmk-run] found $SRC_WORLD to copy"
fi
world_name="`basename $SRC_WORLD`"
mkdir -p ~/tmp
dst_world="$HOME/tmp/${world_name}-$EXE_NAME"
echo "[lmk-run] syncing to $dst_world destructively..."
rsync -rt --erase $SRC_WORLD/ $dst_world
if [ $? -ne 0 ]; then
    >&2 echo "[lmk-run] 'rsync -rt --erase $SRC_WORLD/ $dst_world' failed in `pwd`."
fi
echo "[lmk-run] running $EXE_NAME --world $dst_world"
./$EXE_NAME --world $dst_world
#else
#fi