minor refactor

- simplify CSV reading logic
- add more comments
- rework the packaging script
- remove debug information for git tags

.github/scripts/package-artifacts.sh

@@ -1,12 +1,64 @@
 #!/bin/bash
 set -euo pipefail
+USAGE="\
+Usage: $0 [-t target]... [-o output_dir] [-h]
+	-t target					add a build target
+	-o output_dir			set output directory for compressed files (default: current directory)
+	-h								Show this help message and exit
 
-export OUTPUT_DIR
-mkdir -p "$OUTPUT_DIR"
+Environment variables (override options):
+	OUTPUT_DIR							output directory for compressed files
+	CARGO_BUILD_TARGETS			comma-separated list of targets
+"
+targets=()
+output_dir=
 
-printenv CARGO_BUILD_TARGETS | awk -F, '{
-  for (i = 1; i <= NF; i++)
-    if (match($i, /^([^-]+)(-[^-]+)*-(linux|windows|darwin)(-[^-]+)*$/, matches))
-      printf "%s\0%s\0%s\0", $i, matches[3], matches[1]
-    else print "DEBUG: awk: No regex match for field index " i ": \047" $i "\047" > /dev/stderr
-}' | xargs -0 -n 3 "$(dirname -- "$(readlink -f -- "$0")")/compress-artifact.sh"
+while getopts "t:o:h" opt
+do
+	case $opt in
+		t) targets+=("$OPTARG") ;;
+		o) output_dir="$OPTARG" ;;
+		h) echo "$USAGE"; exit 0 ;;
+		*) echo "Invalid option: ${opt}" >&2; echo "$USAGE"; exit 1 ;;
+	esac
+done
+
+output_dir="${OUTPUT_DIR:-${output_dir:-.}}"
+
+if [ "${CARGO_BUILD_TARGETS+set}" ] # if set (might be empty)
+then IFS=',' read -ra targets <<< "$CARGO_BUILD_TARGETS"
+fi
+
+compress-artifact() {
+	local build_dir os arch binary_file common_files output_file
+
+	build_dir="$1"
+	os="$2"
+	arch="$3"
+
+	binary_file="${build_dir}/sculptor"
+	# can be extended to include more files if needed
+	common_files=("Config.example.toml")
+	output_file="${output_dir}/sculptor-${os}-${arch}"
+
+	if [ "$2" = "windows" ]
+	then zip -j "${output_file}.zip" "${binary_file}.exe" "${common_files[@]}"
+	else tar --transform 's|^.*/||' -czf "${output_file}.tar.gz" "$binary_file" "${common_files[@]}"
+	fi
+}
+
+for target in "${targets[@]}"
+do
+	build_dir="target/${target}/release"
+	# add more targets as needed, for now only linux and windows
+	if [[ "$target" =~ ^([^-]+)(-[^-]+)*-(linux|windows)(-[^-]+)*$ ]]
+	then
+		os="${BASH_REMATCH[3]}"
+		arch="${BASH_REMATCH[1]}"
+		declare -p BASH_REMATCH
+		echo compress-artifact "$build_dir" "$os" "$arch"
+	else
+		echo "ERROR: Invalid target: $target" >&2
+		exit 1
+	fi
+done