#!/usr/bin/env bash

# Exit if anything fails
set -e

which nim > /dev/null || (echo "nim not in PATH"; exit 1)
which gdb > /dev/null || (echo "gdb not in PATH"; exit 1)
which readlink > /dev/null || which greadlink > /dev/null || (echo "readlink not in PATH. Please install coreutils from brew if on Mac."; exit 1)

nreadlink () {
    (which greadlink > /dev/null && greadlink "$@") || (which readlink > /dev/null && readlink "$@") || echo "Readlink could not be found"
}

# Find out where the pretty printer Python module is
NIM_SYSROOT=$(dirname $(dirname $(nreadlink -e $(which nim))))
GDB_PYTHON_MODULE_PATH="$NIM_SYSROOT/tools/nim-gdb.py"

# Run GDB with the additional arguments that load the pretty printers
# Set the environment variable `NIM_GDB` to overwrite the call to a
# different/specific command (defaults to `gdb`).
NIM_GDB="${NIM_GDB:-gdb}"

# This is needed for some reason. I can't get -eval-command to work ever
echo "source $GDB_PYTHON_MODULE_PATH" > gdbcommands.txt
# exec replaces the new process of bash with gdb. It is always good to
# have fewer processes.
exec ${NIM_GDB} --command="gdbcommands.txt" "$@"

rm gdbcommands.txt