refactor(version): derive Apple build numbers

packaging/version/generate-apple-xcconfig.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd "$script_dir/../.." && pwd)"
+resolver="$script_dir/resolve-version.sh"
+output_dir="${VNIDROP_APPLE_XCCONFIG_DIR:-$repo_root/apple/Generated}"
+mode="${1:-all}"
+
+case "$mode" in
+	store|direct|all) ;;
+	*)
+		printf 'Usage: %s {store|direct|all}\n' "$0" >&2
+		exit 1
+		;;
+esac
+
+export VNIDROP_BUILD_TIME_UTC="${VNIDROP_BUILD_TIME_UTC:-$(date -u +%Y%m%d%H%M%S)}"
+product_version="$("$resolver" product)"
+mkdir -p "$output_dir"
+
+write_config() {
+	local filename=$1
+	local build_field=$2
+	local destination="$output_dir/$filename"
+	local temporary
+	local build_number
+
+	build_number="$("$resolver" "$build_field")"
+	temporary="$(mktemp "$output_dir/.${filename}.XXXXXX")"
+	printf '%s\n' \
+		'// Generated by packaging/version/generate-apple-xcconfig.sh.' \
+		'// Regenerate this file instead of editing it.' \
+		'#include "../Signing.xcconfig"' \
+		'' \
+		"PRODUCT_VERSION = $product_version" \
+		"CURRENT_PROJECT_VERSION = $build_number" \
+		> "$temporary"
+	mv "$temporary" "$destination"
+}
+
+if [[ $mode == store || $mode == all ]]; then
+	write_config StoreVersion.xcconfig apple-store-build
+fi
+if [[ $mode == direct || $mode == all ]]; then
+	write_config DirectVersion.xcconfig apple-direct-build
+fi