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https://github.com/opentffoundation/opentf.git
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60b268200c
Signed-off-by: Christian Mesh <christianmesh1@gmail.com> Co-authored-by: Martin Atkins <mart@degeneration.co.uk> Signed-off-by: Christian Mesh <christianmesh1@gmail.com>
64 lines
2.0 KiB
Go
64 lines
2.0 KiB
Go
// Copyright (c) The OpenTofu Authors
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// SPDX-License-Identifier: MPL-2.0
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// Copyright (c) 2023 HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package funcs
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import (
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"github.com/opentofu/opentofu/internal/lang/marks"
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"github.com/zclconf/go-cty/cty"
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"github.com/zclconf/go-cty/cty/function"
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)
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var EphemeralAsNullFunc = function.New(&function.Spec{
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Params: []function.Parameter{
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{
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Name: "value",
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Type: cty.DynamicPseudoType,
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AllowUnknown: true,
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AllowNull: true,
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AllowMarked: true,
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AllowDynamicType: true,
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},
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},
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Type: func(args []cty.Value) (cty.Type, error) {
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// The result type is always the same as the argument type.
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return args[0].Type(), nil
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},
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Impl: func(args []cty.Value, retType cty.Type) (ret cty.Value, err error) {
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return cty.Transform(args[0], func(_ cty.Path, val cty.Value) (cty.Value, error) {
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ty := val.Type()
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// Preserve non-ephemeral marks
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nonEphemeralMarks := val.Marks()
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delete(nonEphemeralMarks, marks.Ephemeral)
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switch {
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case val.IsNull():
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return cty.NullVal(ty).WithMarks(nonEphemeralMarks), nil
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case !val.IsKnown():
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// This mirrors the logic in IsSensitive()
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//
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// When a value is unknown its ephemerality is also not yet
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// finalized, because authors can write expressions where the
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// ephemerality of the result is decided based on some other
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// value that isn't yet known itself. As a simple example:
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// var.unknown_bool ? var.some_ephemeral_value : "b"
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//
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// Therefore we must report that we can't predict whether an
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// unknown value will be ephemeral or not. For more information,
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// refer to https://github.com/opentofu/opentofu/issues/2415
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return cty.UnknownVal(val.Type()).WithMarks(nonEphemeralMarks), nil
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case val.HasMark(marks.Ephemeral):
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// This whole value is marked as ephemeral and should be null
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return cty.NullVal(val.Type()).WithMarks(nonEphemeralMarks), nil
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default:
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// Not marked
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return val, nil
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}
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})
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},
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})
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