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30bf83cdeb
In order to make this work reasonably we can't avoid using some funny heuristics, which are somewhat reasonable to apply within the context of Terraform itself but would not be good to add to the general "logutils". Specifically, this is adding the additional heuristic that lines starting with spaces are continuation lines and so should inherit the log level of the most recent non-continuation line.
86 lines
2.1 KiB
Go
86 lines
2.1 KiB
Go
package terraform
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import (
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"fmt"
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"log"
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"strings"
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"github.com/hashicorp/terraform/addrs"
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"github.com/hashicorp/terraform/helper/logging"
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"github.com/hashicorp/terraform/tfdiags"
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)
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// GraphBuilder is an interface that can be implemented and used with
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// Terraform to build the graph that Terraform walks.
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type GraphBuilder interface {
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// Build builds the graph for the given module path. It is up to
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// the interface implementation whether this build should expand
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// the graph or not.
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Build(addrs.ModuleInstance) (*Graph, tfdiags.Diagnostics)
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}
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// BasicGraphBuilder is a GraphBuilder that builds a graph out of a
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// series of transforms and (optionally) validates the graph is a valid
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// structure.
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type BasicGraphBuilder struct {
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Steps []GraphTransformer
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Validate bool
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// Optional name to add to the graph debug log
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Name string
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}
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func (b *BasicGraphBuilder) Build(path addrs.ModuleInstance) (*Graph, tfdiags.Diagnostics) {
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var diags tfdiags.Diagnostics
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g := &Graph{Path: path}
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var lastStepStr string
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for _, step := range b.Steps {
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if step == nil {
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continue
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}
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log.Printf("[TRACE] Executing graph transform %T", step)
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stepName := fmt.Sprintf("%T", step)
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dot := strings.LastIndex(stepName, ".")
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if dot >= 0 {
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stepName = stepName[dot+1:]
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}
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debugOp := g.DebugOperation(stepName, "")
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err := step.Transform(g)
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errMsg := ""
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if err != nil {
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errMsg = err.Error()
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}
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debugOp.End(errMsg)
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if thisStepStr := g.StringWithNodeTypes(); thisStepStr != lastStepStr {
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log.Printf("[TRACE] Completed graph transform %T with new graph:\n%s ------", step, logging.Indent(thisStepStr))
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lastStepStr = thisStepStr
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} else {
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log.Printf("[TRACE] Completed graph transform %T (no changes)", step)
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}
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if err != nil {
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if nf, isNF := err.(tfdiags.NonFatalError); isNF {
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diags = diags.Append(nf.Diagnostics)
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} else {
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diags = diags.Append(err)
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return g, diags
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}
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}
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}
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// Validate the graph structure
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if b.Validate {
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if err := g.Validate(); err != nil {
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log.Printf("[ERROR] Graph validation failed. Graph:\n\n%s", g.String())
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diags = diags.Append(err)
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return nil, diags
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}
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}
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return g, diags
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}
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