#!/usr/bin/env bash

#----------------------------------------
# Ghidra JShell launch
#----------------------------------------

# Optionally override the default Java heap memory, which is typically 1/4 of system RAM.
# Supported values are of the regular expression form "\d+[gGmMkK]", allowing the value to be 
# specified in gigabytes, megabytes, or kilobytes (for example: 8G, 4096m, etc).
MAXMEM_DEFAULT=

# Allow the above MAXMEM_DEFAULT to be overridden by externally set environment variables
# - GHIDRA_MAXMEM: Desired maximum heap memory for all Ghidra instances
# - GHIDRA_JSHELL_MAXMEM: Desired maximum heap memory only for Ghidra JShell instances
GHIDRA_MAXMEM=${GHIDRA_MAXMEM:=${MAXMEM_DEFAULT}}
GHIDRA_JSHELL_MAXMEM=${GHIDRA_JSHELL_MAXMEM:=${GHIDRA_MAXMEM}}

# Apply Java options from externally set environment variables
VMARG_LIST="${GHIDRA_JAVA_OPTIONS} ${GHIDRA_JSHELL_JAVA_OPTIONS} "

# Resolve symbolic link if present and get the directory this script lives in.
# NOTE: "readlink -f" is best but works on Linux only, "readlink" will only work if your PWD
# contains the link you are calling (which is the best we can do on macOS), and the "echo" is the 
# fallback, which doesn't attempt to do anything with links.
SCRIPT_FILE="$(readlink -f "$0" 2>/dev/null || readlink "$0" 2>/dev/null || echo "$0")"
SCRIPT_DIR="${SCRIPT_FILE%/*}"

# Launch Ghidra
"${SCRIPT_DIR}"/launch.sh fg jdk Ghidra-JShell "${GHIDRA_JSHELL_MAXMEM}" "${VMARG_LIST}" ghidra.JShellRun "$@"