use go generate instead of make for protoc

proto/gen.go

@@ -0,0 +1,3 @@
+package proto
+
+//go:generate protoc --go_out=. mf.proto

proto/mf.proto

@@ -0,0 +1,39 @@
+syntax = "proto3";
+
+option go_package = "mfer";
+
+message MFFile {
+  enum Version {
+    NONE = 0;
+    ONE = 1; // only one for now
+  }
+  Version version = 1;
+  bytes innerMessage = 2;
+  uint64 size = 3;
+  bytes crc32 = 4;
+
+  // think we might use gosignify instead of gpg:
+  // github.com/frankbraun/gosignify
+
+  //detached signature, ascii or binary
+  optional bytes signature = 5;
+  //full GPG key id
+  optional bytes signer = 6;
+  //full GPG signing public key, ascii or binary
+  optional bytes signingPubKey = 7;
+}
+
+message MFFilePath {
+    string path = 1;
+    // FIXME checksum/hash here
+}
+
+message MFFileInner {
+  enum Version {
+    NONE = 0;
+    ONE = 1; // only one for now
+  }
+  Version version = 1;
+  uint64 count = 2;
+  repeated MFFilePath files = 3;
+}