pack/unpack class

compiler/NubLib.cs

@@ -0,0 +1,62 @@
+using System.IO.Compression;
+using System.Text.Json;
+
+namespace Compiler;
+
+public class NubLib
+{
+    private static readonly JsonSerializerOptions JsonOptions = new()
+    {
+        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+        WriteIndented = true,
+    };
+
+    public static void Pack(string outputPath, string archivePath, Manifest manifest)
+    {
+        using var fs = new FileStream(outputPath, FileMode.Create);
+        using var zip = new ZipArchive(fs, ZipArchiveMode.Create);
+
+        var manifestEntry = zip.CreateEntry("manifest.json");
+        using (var writer = new StreamWriter(manifestEntry.Open()))
+        {
+            var serialized = JsonSerializer.Serialize(manifest, JsonOptions);
+
+            writer.Write(serialized);
+        }
+
+        var archiveEntry = zip.CreateEntry("lib.a");
+
+        using var entryStream = archiveEntry.Open();
+        using var fileStream = File.OpenRead(archivePath);
+
+        fileStream.CopyTo(entryStream);
+    }
+
+    public static NublibLoadResult Unpack(string nublibPath)
+    {
+        using var fs = new FileStream(nublibPath, FileMode.Open, FileAccess.Read);
+        using var zip = new ZipArchive(fs, ZipArchiveMode.Read);
+
+        var manifestEntry = zip.GetEntry("manifest.json") ?? throw new FileNotFoundException("Manifest not found in nublib", "manifest.json");
+
+        Manifest manifest;
+        using (var reader = new StreamReader(manifestEntry.Open()))
+        {
+            var json = reader.ReadToEnd();
+            manifest = JsonSerializer.Deserialize<Manifest>(json, JsonOptions) ?? throw new InvalidDataException("Failed to deserialize manifest.json");
+        }
+
+        var archiveEntry = zip.Entries.FirstOrDefault(e => e.Name.EndsWith(".a")) ?? throw new FileNotFoundException("Archive not found in nublib", "*.a");
+
+        string tempArchivePath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString("N") + ".a");
+        using (var entryStream = archiveEntry.Open())
+        using (var tempFile = File.Create(tempArchivePath))
+        {
+            entryStream.CopyTo(tempFile);
+        }
+
+        return new NublibLoadResult(manifest, tempArchivePath);
+    }
+
+    public record NublibLoadResult(Manifest Manifest, string ArchivePath);
+}