If a single process is going to bind and generate multiple programs, it is useful to be able to cache package schemas in order to avoid the (large) overhead of deserializing schemas multiple times.
198 lines
5.3 KiB
Go
198 lines
5.3 KiB
Go
// Copyright 2016-2020, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package hcl2
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import (
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"encoding/json"
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"fmt"
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"github.com/hashicorp/hcl/v2"
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"github.com/hashicorp/hcl/v2/hclsyntax"
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"github.com/pulumi/pulumi/pkg/v2/codegen"
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"github.com/pulumi/pulumi/pkg/v2/codegen/hcl2/model"
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"github.com/pulumi/pulumi/pkg/v2/codegen/schema"
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"github.com/pulumi/pulumi/sdk/v2/go/common/tokens"
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"github.com/pulumi/pulumi/sdk/v2/go/common/util/contract"
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)
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type packageSchema struct {
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schema *schema.Package
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resources map[string]*schema.Resource
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functions map[string]*schema.Function
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}
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type PackageCache struct {
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entries map[string]*packageSchema
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}
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func NewPackageCache() *PackageCache {
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return &PackageCache{
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entries: map[string]*packageSchema{},
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}
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}
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// canonicalizeToken converts a Pulumi token into its canonical "pkg:module:member" form.
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func canonicalizeToken(tok string, pkg *schema.Package) string {
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_, _, member, _ := DecomposeToken(tok, hcl.Range{})
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return fmt.Sprintf("%s:%s:%s", pkg.Name, pkg.TokenToModule(tok), member)
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}
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// loadReferencedPackageSchemas loads the schemas for any pacakges referenced by a given node.
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func (b *binder) loadReferencedPackageSchemas(n Node) error {
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// TODO: package versions
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packageNames := codegen.StringSet{}
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if r, ok := n.(*Resource); ok {
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token, tokenRange := getResourceToken(r)
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packageName, _, _, _ := DecomposeToken(token, tokenRange)
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if packageName != "pulumi" {
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packageNames.Add(packageName)
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}
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}
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diags := hclsyntax.VisitAll(n.SyntaxNode(), func(node hclsyntax.Node) hcl.Diagnostics {
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call, ok := node.(*hclsyntax.FunctionCallExpr)
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if !ok {
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return nil
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}
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token, tokenRange, ok := getInvokeToken(call)
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if !ok {
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return nil
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}
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packageName, _, _, _ := DecomposeToken(token, tokenRange)
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if packageName != "pulumi" {
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packageNames.Add(packageName)
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}
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return nil
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})
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contract.Assert(len(diags) == 0)
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b.referencedPackages = make([]*schema.Package, len(packageNames))
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for i, name := range packageNames.SortedValues() {
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if err := b.loadPackageSchema(name); err != nil {
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return err
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}
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b.referencedPackages[i] = b.options.packageCache.entries[name].schema
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}
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return nil
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}
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// loadPackageSchema loads the schema for a given package by loading the corresponding provider and calling its
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// GetSchema method.
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//
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// TODO: schema and provider versions
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func (b *binder) loadPackageSchema(name string) error {
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if _, ok := b.options.packageCache.entries[name]; ok {
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return nil
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}
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provider, err := b.options.host.Provider(tokens.Package(name), nil)
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if err != nil {
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return err
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}
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schemaBytes, err := provider.GetSchema(0)
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if err != nil {
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return err
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}
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var spec schema.PackageSpec
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if err := json.Unmarshal(schemaBytes, &spec); err != nil {
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return err
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}
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pkg, err := schema.ImportSpec(spec, nil)
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if err != nil {
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return err
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}
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resources := map[string]*schema.Resource{}
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for _, r := range pkg.Resources {
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resources[canonicalizeToken(r.Token, pkg)] = r
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}
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functions := map[string]*schema.Function{}
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for _, f := range pkg.Functions {
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functions[canonicalizeToken(f.Token, pkg)] = f
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}
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b.options.packageCache.entries[name] = &packageSchema{
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schema: pkg,
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resources: resources,
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functions: functions,
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}
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return nil
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}
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// schemaTypeToType converts a schema.Type to a model Type.
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func (b *binder) schemaTypeToType(src schema.Type) (result model.Type) {
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defer func() {
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b.typeSchemas[result] = src
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}()
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switch src := src.(type) {
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case *schema.ArrayType:
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return model.NewListType(b.schemaTypeToType(src.ElementType))
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case *schema.MapType:
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return model.NewMapType(b.schemaTypeToType(src.ElementType))
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case *schema.ObjectType:
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properties := map[string]model.Type{}
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for _, prop := range src.Properties {
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t := b.schemaTypeToType(prop.Type)
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if !prop.IsRequired {
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t = model.NewOptionalType(t)
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}
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properties[prop.Name] = t
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}
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return model.NewObjectType(properties, src)
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case *schema.TokenType:
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t, ok := model.GetOpaqueType(src.Token)
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if !ok {
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tt, err := model.NewOpaqueType(src.Token)
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contract.IgnoreError(err)
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t = tt
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}
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if src.UnderlyingType != nil {
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underlyingType := b.schemaTypeToType(src.UnderlyingType)
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return model.NewUnionType(t, underlyingType)
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}
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return t
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case *schema.UnionType:
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types := make([]model.Type, len(src.ElementTypes))
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for i, src := range src.ElementTypes {
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types[i] = b.schemaTypeToType(src)
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}
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return model.NewUnionType(types...)
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default:
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switch src {
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case schema.BoolType:
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return model.BoolType
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case schema.IntType:
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return model.IntType
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case schema.NumberType:
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return model.NumberType
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case schema.StringType:
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return model.StringType
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case schema.ArchiveType:
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return ArchiveType
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case schema.AssetType:
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return AssetType
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case schema.AnyType:
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return model.DynamicType
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default:
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return model.NoneType
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}
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}
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}
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