Fixup proto formatting and package comments.

This reduces the patches we need when importing into google3

Signed-off-by: Joe Richey <joerichey@google.com>

.github/workflows/ci.yml

@@ -74,9 +74,9 @@ jobs:
         uses: arduino/setup-protoc@v1
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
-          version: "3.19.1"
+          version: "3.21.4"
       - name: Install protoc-gen-go
-        run: go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.27.1
+        run: go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.28.0
       - name: Check Protobuf Generation
         run: |
           go generate ./... ./cmd/... ./launcher/...

cmd/gotpm/main.go

@@ -1,3 +1,4 @@
+// Package main is a just a binary wrapper package around cmd.
 package main
 
 import (

proto/attest.proto

@@ -1,10 +1,11 @@
 syntax = "proto3";
 
 package attest;
-option go_package = "github.com/google/go-tpm-tools/proto/attest";
 
 import "tpm.proto";
 
+option go_package = "github.com/google/go-tpm-tools/proto/attest";
+
 // Information uniquely identifying a GCE instance. Can be used to create an
 // instance URL, which can then be used with GCE APIs. Formatted like:
 //   https://www.googleapis.com/compute/v1/projects/{project_id}/zones/{zone}/instances/{instance_name}
@@ -31,8 +32,8 @@ message Attestation {
   // Attestation Key (AK) Certificate, encoded as ASN.1 DER.
   // Optional.
   bytes ak_cert = 6;
-  // Intermediate Certificates for verifying the AK Certificate, encoded as ASN.1 DER.
-  // Optional.
+  // Intermediate Certificates for verifying the AK Certificate, encoded as
+  // ASN.1 DER. Optional.
   repeated bytes intermediate_certs = 7;
 }
 
@@ -71,7 +72,7 @@ message GrubState {
   // and kernel modules.
   repeated string commands = 2;
 }
-  
+
 // The state of the Linux kernel.
 // At the moment, parsing LinuxKernelState relies on parsing the GrubState.
 // To do so, use ParseOpts{Loader: GRUB} when calling ParseMachineState.
@@ -109,9 +110,8 @@ enum WellKnownCertificate {
 }
 
 message Certificate {
-
   // The representation of the certificate. If the certificate matches a
-  // well-known certificate above, representation should contain the value in 
+  // well-known certificate above, representation should contain the value in
   // the enum. Otherwise, it will contain the raw DER.
   oneof representation {
     // DER representation of the certificate.