#!/bin/bash
# Builds .build/Snapshot.icns from Scripts/IconGenerator.swift.
set -euo pipefail

root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
build="$root/.build"
iconset="$build/Snapshot.iconset"
icns="$build/Snapshot.icns"

# The generator only changes when its source does.
if [[ -f "$icns" && "$icns" -nt "$root/Scripts/IconGenerator.swift" ]]; then
    exit 0
fi

tmp="$(mktemp -d)"
trap 'rm -rf "$tmp"' EXIT

swiftc -O "$root/Scripts/IconGenerator.swift" -o "$tmp/icongen"
rm -rf "$iconset"
"$tmp/icongen" "$iconset"
iconutil -c icns "$iconset" -o "$icns"
rm -rf "$iconset"
echo "make-icon: built $icns"