Complete delink workflow; separate from decomp

We can now create a fresh Ghidra project, import the JSRF executable
into it, import symbols into it, delink object files from it, and then
decompile with objdiff.  Just needs some documentation.

delink/delink.sh

@@ -0,0 +1,69 @@
+#!/bin/sh -eu
+# Script to produce delinked object files in decompile/target/ directory from
+# objects.csv and a Ghidra project via boricj's delinker extension
+
+main() {
+	if [ $# -ne 3 ]; then usage; fi
+
+	ghidra_path=$1
+	project_path=$2
+	project_name=$3
+
+	printf '=== Delinking object files ===\n'
+
+	while IFS= read -r line; do # Read objects.csv line by line
+		# Split columns (col 1 in $1, col 2 in $2, etc.)
+		set -f; IFS_PREV=$IFS; IFS=,
+		set -- $line
+		set +f; IFS=$IFS_PREV
+
+		if [ "$2" == true ]; then # If object is marked for extraction
+			object_name=$1
+			printf '\n--- %s ---\n' "$object_name"
+
+			# Delete object name and delink toggle positional
+			# arguments, leaving only address ranges
+			shift 2
+
+			# Call Ghidra delinker script
+			delink "$ghidra_path" "$project_path" "$project_name" "$*" "$object_name"
+		fi
+	done < objects.csv
+}
+
+usage() {
+	printf '%s\n'\
+		'Usage: delink.sh GHIDRA_PATH PROJECT_PATH PROJECT_NAME'\
+		'    GHIDRA_PATH is the path to your Ghidra installation'\
+		'    PROJECT_PATH is the path to your JSRF Ghidra project'\
+		'    PROJECT_NAME is the name of your JSRF Ghidra project'\
+		''\
+		'Populates the target/ directory with delinked object files using the address'\
+		'ranges given in objects.csv.' >& 2
+	exit 2
+}
+
+delink() {
+# Invoke headless Ghidra with the delinker script to produce an object file
+# $1: Ghidra installation path
+# $2: Ghidra project path
+# $3: Ghidra project name
+# $4: Whitespace-separated address ranges to include in object
+# $5: Output path (inside /target)
+	# Call the right script depending on whether we're on Windows
+	# (this seems like the most reliable method I can find for POSIX sh)
+	if [ -n "$WINDIR" ]; then suffix=.bat
+	else                      suffix=
+	fi
+
+	"$1/support/analyzeHeadless$suffix" "$2" "$3"\
+		-process default.xbe\
+		-noanalysis\
+		-postScript DelinkProgram.java\
+			/exporter 'COFF relocatable object'\
+			$(printf "/include-range %s " $4)\
+			/export "../decompile/target/$5"
+}
+
+
+main "$@"