b4daf94c2f
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.
132 lines
4.2 KiB
Go
132 lines
4.2 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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"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/sdk/v2/go/common/util/contract"
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)
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// bindNode binds a single node in a program. The node's dependencies are bound prior to the node itself; it is an
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// error for a node to depend--directly or indirectly--upon itself.
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func (b *binder) bindNode(node Node) hcl.Diagnostics {
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if node.isBound() {
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return nil
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}
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if node.isBinding() {
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// TODO(pdg): print trace
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rng := node.SyntaxNode().Range()
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return hcl.Diagnostics{{
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Severity: hcl.DiagError,
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Summary: "circular reference",
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Subject: &rng,
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}}
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}
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node.markBinding()
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var diagnostics hcl.Diagnostics
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deps := b.getDependencies(node)
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node.setDependencies(deps)
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// Bind any nodes this node depends on.
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for _, dep := range deps {
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diags := b.bindNode(dep)
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diagnostics = append(diagnostics, diags...)
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}
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switch node := node.(type) {
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case *ConfigVariable:
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diags := b.bindConfigVariable(node)
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diagnostics = append(diagnostics, diags...)
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case *LocalVariable:
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diags := b.bindLocalVariable(node)
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diagnostics = append(diagnostics, diags...)
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case *Resource:
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diags := b.bindResource(node)
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diagnostics = append(diagnostics, diags...)
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case *OutputVariable:
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diags := b.bindOutputVariable(node)
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diagnostics = append(diagnostics, diags...)
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default:
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contract.Failf("unexpected node of type %T (%v)", node, node.SyntaxNode().Range())
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}
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node.markBound()
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return diagnostics
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}
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// getDependencies returns the dependencies for the given node.
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func (b *binder) getDependencies(node Node) []Node {
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depSet := codegen.Set{}
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var deps []Node
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diags := hclsyntax.VisitAll(node.SyntaxNode(), func(node hclsyntax.Node) hcl.Diagnostics {
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depName := ""
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switch node := node.(type) {
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case *hclsyntax.FunctionCallExpr:
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// TODO(pdg): function scope binds tighter than "normal" scope
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depName = node.Name
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case *hclsyntax.ScopeTraversalExpr:
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depName = node.Traversal.RootName()
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default:
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return nil
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}
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// Missing reference errors will be issued during expression binding.
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referent, _ := b.root.BindReference(depName)
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if node, ok := referent.(Node); ok && !depSet.Has(node) {
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depSet.Add(node)
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deps = append(deps, node)
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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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return SourceOrderNodes(deps)
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}
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func (b *binder) bindConfigVariable(node *ConfigVariable) hcl.Diagnostics {
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block, diagnostics := model.BindBlock(node.syntax, model.StaticScope(b.root), b.tokens, b.options.modelOptions()...)
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if defaultValue, ok := block.Body.Attribute("default"); ok {
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node.DefaultValue = defaultValue.Value
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if model.InputType(node.typ).ConversionFrom(node.DefaultValue.Type()) == model.NoConversion {
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diagnostics = append(diagnostics, model.ExprNotConvertible(model.InputType(node.typ), node.DefaultValue))
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}
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}
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node.Definition = block
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return diagnostics
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}
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func (b *binder) bindLocalVariable(node *LocalVariable) hcl.Diagnostics {
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attr, diagnostics := model.BindAttribute(node.syntax, b.root, b.tokens, b.options.modelOptions()...)
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node.Definition = attr
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return diagnostics
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}
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func (b *binder) bindOutputVariable(node *OutputVariable) hcl.Diagnostics {
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block, diagnostics := model.BindBlock(node.syntax, model.StaticScope(b.root), b.tokens, b.options.modelOptions()...)
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if value, ok := block.Body.Attribute("value"); ok {
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node.Value = value.Value
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if model.InputType(node.typ).ConversionFrom(node.Value.Type()) == model.NoConversion {
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diagnostics = append(diagnostics, model.ExprNotConvertible(model.InputType(node.typ), node.Value))
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}
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}
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node.Definition = block
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return diagnostics
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}
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