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 pcl
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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/v3/codegen"
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"github.com/pulumi/pulumi/pkg/v3/codegen/hcl2/model"
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"github.com/pulumi/pulumi/sdk/v3/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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