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https://github.com/opentffoundation/opentf.git
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75c7834ca6
Most of our transformers are pure compute and so don't really have a strong need to generate trace spans under our current focus of only exposing user-facing concepts and external requests in our traces, but unfortunately some of them indirectly depend on provider schema, which in turn means that they can potentially be unlucky enough to be the trigger for making all of the provider requests needed to fill the schema cache and therefore would end up with provider request spans being reported beneath them. As usual with these interface updates, this initial change focuses only on changing the interface and updating its direct callers and implementers to match, without any further refactoring or attempts to plumb contexts to or from other functions that don't have them yet. That means there are a few new context.TODO() calls here that we'll tidy up in a later commit that hopefully won't involve all of the noise that is caused by changing an interface API. Signed-off-by: Martin Atkins <mart@degeneration.co.uk>
79 lines
2.5 KiB
Go
79 lines
2.5 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 tofu
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import (
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"context"
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"log"
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"github.com/opentofu/opentofu/internal/states"
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)
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// StateTransformer is a GraphTransformer that adds the elements of
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// the state to the graph.
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//
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// This transform is used for example by the DestroyPlanGraphBuilder to ensure
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// that only resources that are in the state are represented in the graph.
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type StateTransformer struct {
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// ConcreteCurrent and ConcreteDeposed are used to specialize the abstract
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// resource instance nodes that this transformer will create.
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//
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// If either of these is nil, the objects of that type will be skipped and
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// not added to the graph at all. It doesn't make sense to use this
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// transformer without setting at least one of these, since that would
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// skip everything and thus be a no-op.
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ConcreteCurrent ConcreteResourceInstanceNodeFunc
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ConcreteDeposed ConcreteResourceInstanceDeposedNodeFunc
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State *states.State
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}
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func (t *StateTransformer) Transform(_ context.Context, g *Graph) error {
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if t.State == nil {
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log.Printf("[TRACE] StateTransformer: state is nil, so nothing to do")
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return nil
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}
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switch {
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case t.ConcreteCurrent != nil && t.ConcreteDeposed != nil:
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log.Printf("[TRACE] StateTransformer: creating nodes for both current and deposed instance objects")
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case t.ConcreteCurrent != nil:
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log.Printf("[TRACE] StateTransformer: creating nodes for current instance objects only")
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case t.ConcreteDeposed != nil:
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log.Printf("[TRACE] StateTransformer: creating nodes for deposed instance objects only")
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default:
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log.Printf("[TRACE] StateTransformer: pointless no-op call, creating no nodes at all")
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}
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for _, ms := range t.State.Modules {
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for _, rs := range ms.Resources {
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resourceAddr := rs.Addr
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for key, is := range rs.Instances {
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addr := resourceAddr.Instance(key)
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if obj := is.Current; obj != nil && t.ConcreteCurrent != nil {
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abstract := NewNodeAbstractResourceInstance(addr)
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node := t.ConcreteCurrent(abstract)
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g.Add(node)
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log.Printf("[TRACE] StateTransformer: added %T for %s current object", node, addr)
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}
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if t.ConcreteDeposed != nil {
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for dk := range is.Deposed {
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abstract := NewNodeAbstractResourceInstance(addr)
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node := t.ConcreteDeposed(abstract, dk)
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g.Add(node)
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log.Printf("[TRACE] StateTransformer: added %T for %s deposed object %s", node, addr, dk)
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}
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}
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}
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}
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}
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return nil
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}
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