lc3run

#!/usr/bin/env bash
# Takes assembly on stdin, assembles it, and runs it
debug=false
run=true
custom_tmp=false

if [ "$1" == "--norun" ]; then
    run=false
fi

if [ "$1" == "--usetmp" ]; then
    temp_dir="$2"
    custom_tmp=true
else
    temp_dir="$(mktemp -d)"
fi

set -euo pipefail
# if debug set, print commands before executing them
if [ $debug = 'true' ]; then set -x; fi
if [ $debug = 'true' ]; then echo temp_dir: $temp_dir; fi
asm_path="$temp_dir/a.asm"
obj_path="$temp_dir/a.obj"
script_path="$temp_dir/a.script"

# Pipe input from STDIN to asm file
cat > $temp_dir/a.asm
if [ $debug = 'true' ]; then cat $asm_path; fi

# Assemble input
# `chronic` ignores output unless there is an error, in which
# case it outputs normally.
# Requires debian package 'moreutils'
chronic lc3as $asm_path || exit
if [ $debug = 'true' ]; then ls $temp_dir; fi

# Create script file
echo "file $obj_path
continue" > $script_path

# Run it.
# Remove line that says "Loaded such-and-such"
# Remove part after LC3 halts
if [ $run = 'true' ]; then
    lc3sim -norun -s $script_path | sed '1 d; /--- halting the LC-3 ---/,$ d' | head --bytes -2
else
    echo lc3sim -norun $obj_path # | sed '1 d'
    exit
fi

# If not in debug mode, clean up after ourselves.
if [ $custom_tmp == 'false' ]; then
    if [ $debug != 'true' ];
        then rm -r $temp_dir;
    fi
fi