#!/usr/bin/env bash

# Determine if this is Desktop cuda-gdb, or the QNX specific cuda-qnx-gdb
CUDA_GDB=`basename $0`

# Check the cuda-gdb executables in order of preference
# for unresolved shared library references.

# Start with the value of CUDA_GDB_BINARIES, so that end-users can put their own
# at the front of the list.
CUDA_GDB_BINARIES="$CUDA_GDB_BINARIES ${CUDA_GDB}-python3.12-tui"
CUDA_GDB_BINARIES="$CUDA_GDB_BINARIES ${CUDA_GDB}-python3.11-tui"
CUDA_GDB_BINARIES="$CUDA_GDB_BINARIES ${CUDA_GDB}-python3.10-tui"
CUDA_GDB_BINARIES="$CUDA_GDB_BINARIES ${CUDA_GDB}-python3.9-tui"
CUDA_GDB_BINARIES="$CUDA_GDB_BINARIES ${CUDA_GDB}-python3.8-tui"
CUDA_GDB_BINARIES="$CUDA_GDB_BINARIES ${CUDA_GDB}-minimal"

PRINT_VERSION=0
for arg in $*; do
    if [ "$arg" == "--version" ]; then
        PRINT_VERSION=1
        break
    fi
done

exec_cuda_gdb() {
    binary="$1"
    shift

    # Check to see if the specified cuda-gdb executable will run on this
    # system by invoking cuda-gdb with --version. If it succeeds
    # with exit code 0, go ahead and run the binary
    OUTPUT=`$binary --version 2>&1`
    EXITCODE=$?
    if [ $EXITCODE == 0 ]; then
        if [ "$PRINT_VERSION" != 0 ]; then
            echo "exec:" "$binary" "$@"
        fi
        exec "$binary" "$@"
    elif [[ ! "$OUTPUT" =~ "No such file or directory" ]]; then
        # In particular, cuda-qnx-gdb binaries can exit with 1
        # and a message if the QNX environment is not set up.
        echo `basename $binary`": $OUTPUT" 1>&2
    fi
}

# Check alongside this wrapper script.
# Note that 'dirname cuda-gdb-python3.12-tui' will return '.'
# even without an explicit leading './'
WRAPPER_SCRIPT_DIR=`dirname $0`
for binary in $CUDA_GDB_BINARIES; do
    if [ -f "$WRAPPER_SCRIPT_DIR/$binary" ]; then
        exec_cuda_gdb "$WRAPPER_SCRIPT_DIR/$binary" "$@"
    fi
done

# Check the $PATH
for binary in $CUDA_GDB_BINARIES; do
    exec_cuda_gdb "$binary" "$@"
done

echo "Could not find system compatible $CUDA_GDB binary executable" 1>&2
echo "Supported binaries are: $CUDA_GDB_BINARIES" 1>&2
exit 1