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resourceinstance.go
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resourceinstance.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package parsing
import (
"context"
"encoding/json"
"fmt"
"strings"
"golang.org/x/exp/maps"
"google.golang.org/protobuf/types/known/anypb"
"namespacelabs.dev/foundation/framework/kubernetes/kubenaming"
"namespacelabs.dev/foundation/framework/rpcerrors/multierr"
"namespacelabs.dev/foundation/internal/fnerrors"
"namespacelabs.dev/foundation/internal/parsing/invariants"
"namespacelabs.dev/foundation/internal/protos"
"namespacelabs.dev/foundation/schema"
"namespacelabs.dev/foundation/std/pkggraph"
"namespacelabs.dev/foundation/std/resources"
)
const Version_LibraryIntentsChanged = 48
type packageRefLike interface {
GetPackageName() string
GetName() string
}
func isRuntimeResource(ref packageRefLike) bool {
return ref.GetPackageName() == "namespacelabs.dev/foundation/library/runtime" || ref.GetPackageName() == "library.namespace.so/runtime"
}
func IsServerResource(ref packageRefLike) bool {
return isRuntimeResource(ref) && ref.GetName() == "Server"
}
func IsSecretResource(ref packageRefLike) bool {
return isRuntimeResource(ref) && ref.GetName() == "Secret"
}
func loadResourceInstance(ctx context.Context, pl pkggraph.PackageLoader, pkg *pkggraph.Package, parentID string, instance *schema.ResourceInstance) (*pkggraph.ResourceInstance, error) {
loc := pkg.Location
if instance.IntentFrom != nil {
if err := pl.Ensure(ctx, instance.IntentFrom.BinaryRef.AsPackageName()); err != nil {
return nil, err
}
}
class, err := pkggraph.LookupResourceClass(ctx, pl, pkg, instance.Class)
if err != nil {
return nil, err
}
name := &schema.PackageRef{PackageName: instance.PackageName, Name: instance.Name}
ri := pkggraph.ResourceSpec{
Source: protos.Clone(instance),
Class: *class,
}
provider := schema.PackageName(instance.Provider)
if provider == "" {
provider = class.DefaultProvider
}
if provider != "" {
provider, err := LookupResourceProvider(ctx, pl, pkg, provider.String(), instance.Class)
if err != nil {
return nil, fnerrors.AttachLocation(name, err)
}
ri.Provider = provider
}
if ri.Provider == nil {
return nil, fnerrors.NewWithLocation(loc, "missing provider for instance %q", instance.Name)
}
if ri.Provider.IntentType == nil {
return nil, fnerrors.NewWithLocation(loc, "missing intent type for instance %q", instance.Name)
}
ri.IntentType = ri.Provider.IntentType
if instance.SerializedIntentJson != "" {
var raw any
if err := NewJsonNumberDecoder(instance.SerializedIntentJson).Decode(&raw); err != nil {
return nil, fnerrors.InternalError("failed to unmarshal serialized intent: %w", err)
}
resourceLoc, err := pl.Resolve(ctx, schema.PackageName(instance.PackageName))
if err != nil {
return nil, fnerrors.InternalError("failed to resolve %q: %w", instance.PackageName, err)
}
parsed, err := parseRawIntent(ctx, pl, pkg, resourceLoc, ri.IntentType, raw)
if err != nil {
return nil, fnerrors.NewWithLocation(loc, "failed to parse intent %q: %w", instance.Name, err)
}
ri.Intent = parsed
if err := checkLoadPrimitiveResources(ctx, pl, loc.PackageName, ri.Class.Source, parsed); err != nil {
return nil, err
}
}
index := map[string]*schema.ResourceInstance_InputResource{}
for _, input := range instance.InputResource {
index[input.Name.Canonical()] = input
}
var errs []error
if ri.Provider != nil {
for _, expected := range ri.Provider.ResourceInputs {
value, ok := index[expected.Name.Canonical()]
var resourceRef *schema.PackageRef
if !ok {
if expected.DefaultResource != nil {
resourceRef = expected.DefaultResource
} else {
errs = append(errs, fnerrors.New("resource input for %q is missing", expected.Name.Canonical()))
continue
}
} else {
resourceRef = value.ResourceRef
delete(index, expected.Name.Canonical())
}
name := expected.Name.Canonical()
var instance *pkggraph.ResourceInstance
// Special handling for resources in the same package to avoid deadlocking the package loader.
if resourceRef.AsPackageName() == pkg.PackageName() {
var ri *schema.ResourceInstance
for _, r := range pkg.ResourceInstanceSpecs {
if r.Name == resourceRef.Name {
ri = r
break
}
}
instance, err = loadResourceInstance(ctx, pl, pkg, parentID, ri)
if err != nil {
errs = append(errs, fnerrors.BadInputError("resource %q failed to load: %w", name, err))
continue
}
} else {
resPkg, err := pl.LoadByName(ctx, resourceRef.AsPackageName())
if err != nil {
errs = append(errs, fnerrors.BadInputError("resource %q failed to load package: %w", name, err))
continue
}
instance = resPkg.LookupResourceInstance(resourceRef.Name)
}
if instance == nil {
errs = append(errs, fnerrors.BadInputError("resource %q refers to non-existing resource %q", name, resourceRef.Canonical()))
} else if instance.Spec.Class.Ref.Canonical() != expected.Class.Ref.Canonical() {
errs = append(errs, fnerrors.BadInputError("resource %q is of class %q, expected %q", name,
instance.Spec.Class.Ref.Canonical(), expected.Class.Ref.Canonical()))
} else {
ri.ResourceInputs = append(ri.ResourceInputs, pkggraph.ResourceInstance{
ResourceID: instance.ResourceID,
ResourceRef: expected.Name,
Spec: instance.Spec,
})
}
}
}
if len(index) > 0 {
errs = append(errs, fnerrors.New("the following specified resource values are not required: %s", strings.Join(maps.Keys(index), ", ")))
}
if err := multierr.New(errs...); err != nil {
return nil, err
}
return &pkggraph.ResourceInstance{
ResourceID: resources.ScopedID(parentID, name),
ResourceRef: name,
Spec: ri,
}, nil
}
func parseRawIntent(ctx context.Context, pl pkggraph.PackageLoader, pkg *pkggraph.Package, loc pkggraph.Location, intentType *pkggraph.UserType, value any) (*anypb.Any, error) {
subFsys := loc.Module.ReadOnlyFS(loc.Rel())
msg, err := protos.AllocateWellKnownMessage(ctx, protos.ParseContext{
SupportWellKnownMessages: true,
FS: subFsys,
PackageName: loc.PackageName,
EnsurePackage: func(requested schema.PackageName) error {
return invariants.EnsurePackageLoaded(ctx, pl, pkg.PackageName(), requested)
},
}, intentType.Descriptor, value)
if err != nil {
return nil, err
}
return anypb.New(msg)
}
func LookupResourceProvider(ctx context.Context, pl pkggraph.PackageLoader, pkg *pkggraph.Package, provider string, classRef *schema.PackageRef) (*pkggraph.ResourceProvider, error) {
var providerPkg *pkggraph.Package
// Is this a resource that references a provider in the same package?
if provider == pkg.PackageName().String() {
providerPkg = pkg
if pkg == nil {
return nil, fnerrors.InternalError("resource references %q as the provider but no provider package was specified", provider)
}
} else {
loadedPkg, err := pl.LoadByName(ctx, schema.PackageName(provider))
if err != nil {
return nil, err
}
providerPkg = loadedPkg
}
p := providerPkg.LookupResourceProvider(classRef)
if p == nil {
return nil, fnerrors.New("package %q is not a provider for resource class %q", providerPkg.PackageName(), classRef.Canonical())
}
return p, nil
}
func checkLoadPrimitiveResources(ctx context.Context, pl pkggraph.PackageLoader, owner schema.PackageName, class *schema.ResourceClass, value *anypb.Any) error {
if err := pkggraph.ValidateFoundation("runtime resources", Version_LibraryIntentsChanged, pkggraph.ModuleFromLoader(ctx, pl)); err != nil {
return err
}
return nil
}
func LoadResources(ctx context.Context, pl pkggraph.PackageLoader, pkg *pkggraph.Package, parentID string, pack *schema.ResourcePack) ([]pkggraph.ResourceInstance, error) {
var resources []pkggraph.ResourceInstance
for _, resource := range pack.GetResourceRef() {
pkg, err := pl.LoadByName(ctx, resource.AsPackageName())
if err != nil {
return nil, err
}
res := pkg.LookupResourceInstance(resource.Name)
if res == nil {
return nil, fnerrors.BadInputError("%s: no such resource", resource.Canonical())
}
resources = append(resources, *res)
}
for _, resource := range pack.GetResourceInstance() {
instance, err := loadResourceInstance(ctx, pl, pkg, parentID, resource)
if err != nil {
return nil, err
}
resources = append(resources, *instance)
}
return resources, nil
}
func AddServersAsResources(ctx context.Context, pl pkggraph.PackageLoader, owner *schema.PackageRef, servers []schema.PackageName, frag *schema.ServerFragment) error {
if len(servers) == 0 {
return nil
}
if frag.ResourcePack == nil {
frag.ResourcePack = &schema.ResourcePack{}
}
return AddServersAsResourcesToPack(ctx, pl, owner, servers, frag.ResourcePack)
}
func AddServersAsResourcesToPack(ctx context.Context, pl pkggraph.PackageLoader, owner *schema.PackageRef, servers []schema.PackageName, pack *schema.ResourcePack) error {
if owner.PackageName == "" {
return fnerrors.InternalError("owner.package_name is missing")
}
for _, s := range servers {
intent, err := json.Marshal(&schema.PackageRef{
PackageName: s.String(),
})
if err != nil {
return err
}
name := kubenaming.StableIDN(fmt.Sprintf("%s->%s", owner.Canonical(), s.String()), 8)
if err := pl.Ensure(ctx, schema.PackageName(s.String())); err != nil {
return err
}
pack.ResourceInstance = append(pack.ResourceInstance, &schema.ResourceInstance{
PackageName: owner.PackageName,
Name: name,
Class: &schema.PackageRef{PackageName: "namespacelabs.dev/foundation/library/runtime", Name: "Server"},
SerializedIntentJson: string(intent),
})
}
if len(servers) > 0 {
if err := pl.Ensure(ctx, "namespacelabs.dev/foundation/library/runtime"); err != nil {
return err
}
}
return nil
}