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https://github.com/opentofu/opentofu.git
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47 lines
1.4 KiB
Go
47 lines
1.4 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 statefile
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import (
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"bytes"
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"github.com/opentofu/opentofu/internal/encryption"
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"github.com/opentofu/opentofu/internal/states"
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)
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// StatesMarshalEqual returns true if and only if the two given states have
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// an identical (byte-for-byte) statefile representation.
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//
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// This function compares only the portions of the state that are persisted
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// in state files, so for example it will not return false if the only
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// differences between the two states are local values or descendent module
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// outputs.
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func StatesMarshalEqual(a, b *states.State) bool {
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var aBuf bytes.Buffer
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var bBuf bytes.Buffer
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// nil states are not valid states, and so they can never martial equal.
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if a == nil || b == nil {
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return false
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}
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// We write here some temporary files that have no header information
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// populated, thus ensuring that we're only comparing the state itself
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// and not any metadata.
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err := Write(&File{State: a}, &aBuf, encryption.StateEncryptionDisabled())
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if err != nil {
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// Should never happen, because we're writing to an in-memory buffer
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panic(err)
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}
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err = Write(&File{State: b}, &bBuf, encryption.StateEncryptionDisabled())
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if err != nil {
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// Should never happen, because we're writing to an in-memory buffer
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panic(err)
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}
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return bytes.Equal(aBuf.Bytes(), bBuf.Bytes())
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}
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