csexec

#!/bin/bash

#
#  csexec
#
#  Author:
#       Roman M. Yagodin <roman.yagodin@gmail.com>
#
#  Copyright (c) 2015-2019 Roman M. Yagodin
#
#  This program 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.
#
#  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

# set TMPDIR
if [ -z "$TMPDIR" ]; then
    export TMPDIR="/tmp/csexec"
    # create temp directory, if not exists
    mkdir -p "$TMPDIR"
fi

# copy (update) assemblies to temp directory
cp -u $HOME/.config/csharp/*.dll "$TMPDIR"

# use temp directory to get referenced assemblies
COMPILER_ARGS="/nologo -lib:/$TMPDIR"

# compiler args should start with "-",
# else the arg contains script file name
if [[ ${1:0:1} == "-" ]]; then
    CSEXEC_ARGS=$1

    # need to run in terminal?
    if [[ ${CSEXEC_ARGS:0:2} == "-t" || ${CSEXEC_ARGS:0:2} == "-T" ]]; then
        TERMINAL_COMMAND="x-terminal-emulator -e"
        CSEXEC_ARGS=${CSEXEC_ARGS:2}
    fi

    # get additional compiler args
    if [ -n "$CSEXEC_ARGS" ]; then
        COMPILER_ARGS="$COMPILER_ARGS $CSEXEC_ARGS"
    fi

    shift
fi

# script file
SCRIPT_FILE="$1"

# get temporary filenames
SOURCE_FILE="$(mktemp --tmpdir=$TMPDIR)"
BINARY_FILE="$(mktemp --tmpdir=$TMPDIR)"
CSEXEC_LOG="$(mktemp --tmpdir=$TMPDIR)"

# remove first (hashbang) line
tail -n +2 "$SCRIPT_FILE" > $SOURCE_FILE

pushd . > /dev/null
cd "$TMPDIR"

# build
csc $COMPILER_ARGS $SOURCE_FILE -out:$BINARY_FILE &> $CSEXEC_LOG
COMPILER_EXIT_CODE=$?

popd > /dev/null

# check working directory path length
LANG_OLD=$LANG
LANG=C
if [ ${#PWD} -gt 260 ]; then
    COMPILER_EXIT_CODE=1
    echo "Error: Cannot run the script - path is too long." >> $CSEXEC_LOG
fi
LANG=$LANG_OLD

if [ ! -s $CSEXEC_LOG ]; then
    # if compiler log is empty, remove it from the working directory (if it exists)
    rm -f "csexec.log"
else
    # otherwise, copy log to the working directory
    cp -f $CSEXEC_LOG "csexec.log"
fi

# run
if [ $COMPILER_EXIT_CODE -eq 0 ]; then
    $TERMINAL_COMMAND mono $BINARY_FILE "$@"
fi    

# remove temporary files
rm -f $SOURCE_FILE $BINARY_FILE $CSEXEC_LOG