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72 lines
2.2 KiB
Go
72 lines
2.2 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package states
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import (
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"reflect"
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"github.com/hashicorp/terraform/internal/addrs"
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)
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// Equal returns true if the receiver is functionally equivalent to other,
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// including any ephemeral portions of the state that would not be included
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// if the state were saved to files.
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//
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// To test only the persistent portions of two states for equality, instead
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// use statefile.StatesMarshalEqual.
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func (s *State) Equal(other *State) bool {
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// For the moment this is sufficient, but we may need to do something
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// more elaborate in future if we have any portions of state that require
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// more sophisticated comparisons.
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return reflect.DeepEqual(s, other)
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}
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// ManagedResourcesEqual returns true if all of the managed resources tracked
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// in the reciever are functionally equivalent to the same tracked in the
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// other given state.
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//
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// This is a more constrained version of Equal that disregards other
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// differences, including but not limited to changes to data resources and
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// changes to output values.
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func (s *State) ManagedResourcesEqual(other *State) bool {
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// First, some accommodations for situations where one of the objects is
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// nil, for robustness since we sometimes use a nil state to represent
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// a prior state being entirely absent.
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if s == nil && other == nil {
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return true
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}
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if s == nil {
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return !other.HasManagedResourceInstanceObjects()
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}
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if other == nil {
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return !s.HasManagedResourceInstanceObjects()
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}
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// If we get here then both states are non-nil.
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// sameManagedResources tests that its second argument has all the
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// resources that the first one does, so we'll call it twice with the
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// arguments inverted to ensure that we'll also catch situations where
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// the second has resources that the first does not.
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return sameManagedResources(s, other) && sameManagedResources(other, s)
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}
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func sameManagedResources(s1, s2 *State) bool {
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for _, ms := range s1.Modules {
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for _, rs := range ms.Resources {
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addr := rs.Addr
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if addr.Resource.Mode != addrs.ManagedResourceMode {
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continue
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}
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otherRS := s2.Resource(addr)
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if !reflect.DeepEqual(rs, otherRS) {
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return false
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}
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}
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}
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return true
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}
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