2020-04-03 08:29:05 +02:00
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package python
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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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2020-04-14 10:30:25 +02:00
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"github.com/pulumi/pulumi/pkg/v2/codegen/hcl2"
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"github.com/pulumi/pulumi/pkg/v2/codegen/hcl2/model"
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2020-04-21 22:52:24 +02:00
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"github.com/pulumi/pulumi/pkg/v2/codegen/schema"
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2020-04-14 10:30:25 +02:00
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"github.com/pulumi/pulumi/sdk/v2/go/common/util/contract"
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2020-04-21 22:52:24 +02:00
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"github.com/zclconf/go-cty/cty"
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2020-04-03 08:29:05 +02:00
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)
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// parseProxyApply attempts to match the given parsed apply against the pattern (call __applyArg 0). If the call
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// matches, it returns the ScopeTraversalExpression that corresponds to argument zero, which can then be generated as a
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// proxied apply call.
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2020-04-25 07:04:24 +02:00
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func (g *generator) parseProxyApply(args []model.Expression,
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2020-04-03 08:29:05 +02:00
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then *model.AnonymousFunctionExpression) (*model.ScopeTraversalExpression, bool) {
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if len(args) != 1 {
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return nil, false
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}
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2020-04-25 07:04:24 +02:00
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arg, ok := args[0].(*model.ScopeTraversalExpression)
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if !ok {
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return nil, false
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}
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2020-04-03 08:29:05 +02:00
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thenTraversal, ok := then.Body.(*model.ScopeTraversalExpression)
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if !ok || thenTraversal.Parts[0] != then.Parameters[0] {
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return nil, false
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}
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2020-04-25 07:04:24 +02:00
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traversal := hcl.TraversalJoin(arg.Traversal, thenTraversal.Traversal[1:])
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2020-04-03 08:29:05 +02:00
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expr, diags := g.program.BindExpression(&hclsyntax.ScopeTraversalExpr{
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Traversal: traversal,
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SrcRange: traversal.SourceRange(),
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})
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contract.Assert(len(diags) == 0)
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return expr.(*model.ScopeTraversalExpression), true
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}
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// lowerProxyApplies lowers certain calls to the apply intrinsic into proxied property accesses. Concretely, this boils
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// down to rewriting the following shape:
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// - (call __apply (resource variable access) (call __applyArg 0))
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// into
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// - (resource variable access)
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func (g *generator) lowerProxyApplies(expr model.Expression) (model.Expression, hcl.Diagnostics) {
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rewriter := func(expr model.Expression) (model.Expression, hcl.Diagnostics) {
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// Ignore the node if it is not a call to the apply intrinsic.
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apply, ok := expr.(*model.FunctionCallExpression)
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if !ok || apply.Name != hcl2.IntrinsicApply {
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return expr, nil
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}
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// Parse the apply call.
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args, then := hcl2.ParseApplyCall(apply)
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// Attempt to match (call __apply (rvar) (call __applyArg 0))
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if v, ok := g.parseProxyApply(args, then); ok {
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return v, nil
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}
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return expr, nil
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}
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return model.VisitExpression(expr, model.IdentityVisitor, rewriter)
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}
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2020-04-21 22:52:24 +02:00
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func (g *generator) mapObjectKey(key string, obj *schema.ObjectType) string {
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if obj == nil {
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return key
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}
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prop, ok := obj.Property(key)
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if !ok {
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return key
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}
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mapCase := true
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if info, ok := prop.Language["python"]; ok {
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mapCase = info.(PropertyInfo).MapCase
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}
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if mapCase {
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return PyName(key)
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}
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return key
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}
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func (g *generator) getObjectSchema(typ model.Type) *schema.ObjectType {
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typ = model.ResolveOutputs(typ)
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if union, ok := typ.(*model.UnionType); ok {
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for _, t := range union.ElementTypes {
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if obj := g.getObjectSchema(t); obj != nil {
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return obj
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}
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}
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return nil
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}
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annotations := typ.GetAnnotations()
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if len(annotations) == 1 {
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return annotations[0].(*schema.ObjectType)
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}
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return nil
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}
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func (g *generator) lowerObjectKeys(expr model.Expression, destType model.Type) {
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rewriter := func(expr model.Expression) (model.Expression, hcl.Diagnostics) {
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switch expr := expr.(type) {
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case *model.ObjectConsExpression:
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obj := g.getObjectSchema(destType)
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for _, item := range expr.Items {
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// Ignore non-literal keys
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valueType := model.Type(model.DynamicType)
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if key, ok := item.Key.(*model.LiteralValueExpression); ok && key.Value.Type().Equals(cty.String) {
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k := key.Value.AsString()
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vt, diags := destType.Traverse(hcl.TraverseAttr{Name: k})
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contract.Ignore(diags)
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valueType = vt.(model.Type)
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key.Value = cty.StringVal(g.mapObjectKey(k, obj))
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}
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g.lowerObjectKeys(item.Value, valueType)
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}
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case *model.TupleConsExpression:
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valueType, diags := destType.Traverse(hcl.TraverseIndex{Key: cty.NumberIntVal(0)})
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contract.Ignore(diags)
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for _, element := range expr.Expressions {
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g.lowerObjectKeys(element, valueType.(model.Type))
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}
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}
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return expr, nil
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}
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_, diags := model.VisitExpression(expr, rewriter, nil)
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contract.Assert(len(diags) == 0)
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}
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