Read a build module's steps and toolchains states with its own tools, so a step's result and the reported toolchain can be checked live (issue 1562)

modules/mesh-build-node/cmd/mesh-build-node/main.go

@@ -38,17 +38,19 @@ func main() {
 		return ReadRegistry(filepath.Join(home, "package-registry.json"), filepath.Join(home, "package-registry.secret"))
 	}
 	m := &Module{
-		Node:       strings.TrimSpace(os.Getenv("MESH_NODE")),
-		Reload:     func() (Recipe, error) { return ReadRecipe(paths.LockPath()) },
-		Probe:      ProbeNode,
-		Toolchain:  &Toolchain{Paths: paths, Run: forgekey.ExecRunnerClean(0), Registry: registry},
-		Toolchains: stdio.State(delivery.ToolchainsState).Put,
-		Emit:       func(t string, b any) error { return stdio.Emit(t, b) },
-		Steps:      stdio.State(delivery.StepsState).Put,
-		Work:       WorkDir,
-		Run:        forgekey.ExecRunnerClean(0),
-		Ctx:        ctx,
-		Say:        logf,
+		Node:                strings.TrimSpace(os.Getenv("MESH_NODE")),
+		Reload:              func() (Recipe, error) { return ReadRecipe(paths.LockPath()) },
+		Probe:               ProbeNode,
+		Toolchain:           &Toolchain{Paths: paths, Run: forgekey.ExecRunnerClean(0), Registry: registry},
+		Toolchains:          stdio.State(delivery.ToolchainsState).Put,
+		Emit:                func(t string, b any) error { return stdio.Emit(t, b) },
+		Steps:               stdio.State(delivery.StepsState).Put,
+		ReadSteps:           readOf(stdio.State(delivery.StepsState)),
+		ReadToolchainsState: readOf(stdio.State(delivery.ToolchainsState)),
+		Work:                WorkDir,
+		Run:                 forgekey.ExecRunnerClean(0),
+		Ctx:                 ctx,
+		Say:                 logf,
 	}
 	// Outside a launch by the runtime — a build, a check — there is no node and no state to write.
 	if m.Node != "" {