mirror of https://github.com/pulumi/pulumi.git
90 lines
2.1 KiB
Go
90 lines
2.1 KiB
Go
// Copyright 2021-2024, 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 gen
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import (
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"fmt"
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"github.com/hashicorp/hcl/v2"
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"github.com/pulumi/pulumi/pkg/v3/codegen/hcl2/model"
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)
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type spillFunc func(x model.Expression) (string, model.Expression, bool)
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type spillTemp struct {
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Kind string
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Variable *model.Variable
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Value model.Expression
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}
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type spills struct {
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counts map[string]int
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}
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func (s *spills) newTemp(kind string, value model.Expression) *spillTemp {
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i := s.counts[kind]
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s.counts[kind] = i + 1
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v := &model.Variable{
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Name: fmt.Sprintf("%s%d", kind, i),
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VariableType: value.Type(),
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}
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return &spillTemp{
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Variable: v,
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Value: value,
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}
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}
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type spiller struct {
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spills *spills
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temps []*spillTemp
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spill spillFunc
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disabled bool
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}
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func (s *spiller) preVisit(x model.Expression) (model.Expression, hcl.Diagnostics) {
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_, isfn := x.(*model.AnonymousFunctionExpression)
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if isfn {
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s.disabled = true
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}
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return x, nil
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}
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func (s *spiller) postVisit(x model.Expression) (model.Expression, hcl.Diagnostics) {
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_, isfn := x.(*model.AnonymousFunctionExpression)
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if isfn {
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s.disabled = false
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} else if !s.disabled {
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if kind, value, ok := s.spill(x); ok {
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t := s.spills.newTemp(kind, value)
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s.temps = append(s.temps, t)
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return model.VariableReference(t.Variable), nil
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}
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}
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return x, nil
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}
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func (g *generator) rewriteSpills(
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x model.Expression, spill spillFunc,
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) (model.Expression, []*spillTemp, hcl.Diagnostics) {
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spiller := &spiller{
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spills: g.spills,
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spill: spill,
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}
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x, diags := model.VisitExpression(x, spiller.preVisit, spiller.postVisit)
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return x, spiller.temps, diags
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}
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