Send each resource's module and each module's build to a node that reads them; pin mesh-host at 0b391f49a25f (issue 1145)

internal/link/enrolment.go

@@ -460,6 +460,10 @@ func (e Enrolment) Heard(ctx context.Context, report Report) (news bool, err err
 		if err := e.Inventory.RecordReadsGeneration(ctx, node.ID, report.ReadsGeneration); err != nil {
 			return false, err
 		}
+		// And whether it reads a module per resource and a build per module (novox/hq issue 1145), the same way.
+		if err := e.Inventory.RecordReadsModules(ctx, node.ID, report.ReadsModules); err != nil {
+			return false, err
+		}
 	}
 	if report.Ordered() {
 		account := AccountOf(report)

internal/link/generation_test.go

@@ -31,3 +31,18 @@ func TestTheGenerationOnTheWire(t *testing.T) {
 		t.Fatalf("a node-engine that never said it reads a generation reads as one that does: %+v", older)
 	}
 }
+
+// 1145/AC3: a report's word that the node-engine reads a module per resource and a build per module, as mesh-host's
+// report writes it: `reads_modules`, on every report of a node-engine that reads them.
+func TestWhetherTheNodeEngineReadsModulesIsOnItsReport(t *testing.T) {
+	var reads, older Report
+	if err := json.Unmarshal([]byte(`{"node":"anchor","applied":["a"],"report_sequence":8,"reads_modules":true}`), &reads); err != nil {
+		t.Fatal(err)
+	}
+	if err := json.Unmarshal([]byte(`{"node":"anchor","applied":["a"],"report_sequence":3}`), &older); err != nil {
+		t.Fatal(err)
+	}
+	if !reads.ReadsModules || older.ReadsModules {
+		t.Fatalf("1145/AC3: reads %v, an older node-engine reads %v", reads.ReadsModules, older.ReadsModules)
+	}
+}

internal/link/protocol.go

@@ -202,6 +202,10 @@ type Report struct {
 	// so, because an older node-engine refuses a key it does not know, whole. Mirrors mesh-host
 	// internal/link/messages.go.
 	ReadsGeneration bool `json:"reads_generation,omitempty"`
+	// ReadsModules says the node-engine reads a module on each resource of a declaration and the build of each module
+	// (novox/hq issue 1145), on every report it makes: the mesh sends them only to a machine that said so. Mirrors
+	// mesh-host internal/link/messages.go.
+	ReadsModules bool `json:"reads_modules,omitempty"`
 	// OlderGeneration is set on a report refusing a declaration composed from an older assignment
 	// generation than the machine applied (novox/hq issue 234). The refused declaration is the report's
 	// own Declared and Order, and its sender is read from the record of sends by that sequence.