114 lines
2.9 KiB
Go
114 lines
2.9 KiB
Go
package hcl2template
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import (
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"fmt"
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"github.com/hashicorp/hcl/v2"
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)
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// A source field in an HCL file will load into the Source type.
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//
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type Source struct {
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// Type of source; ex: virtualbox-iso
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Type string
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// Given name; if any
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Name string
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Cfg interface{}
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HCL2Ref HCL2Ref
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}
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func (p *Parser) decodeSource(block *hcl.Block, sourceSpecs map[string]Decodable) (*Source, hcl.Diagnostics) {
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source := &Source{
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Type: block.Labels[0],
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Name: block.Labels[1],
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}
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source.HCL2Ref.DeclRange = block.DefRange
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var diags hcl.Diagnostics
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sourceSpec, found := sourceSpecs[source.Type]
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if !found {
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diags = append(diags, &hcl.Diagnostic{
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Summary: "Unknown " + sourceLabel + " type",
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Subject: &block.LabelRanges[0],
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})
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return source, diags
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}
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flatSource, moreDiags := decodeDecodable(block, nil, sourceSpec)
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diags = append(diags, moreDiags...)
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source.Cfg = flatSource
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return source, diags
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}
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func (source *Source) Ref() SourceRef {
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return SourceRef{
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Type: source.Type,
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Name: source.Name,
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}
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}
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type SourceRef struct {
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Type string
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Name string
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}
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// NoSource is the zero value of sourceRef, representing the absense of an
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// source.
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var NoSource SourceRef
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func sourceRefFromAbsTraversal(t hcl.Traversal) (SourceRef, hcl.Diagnostics) {
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var diags hcl.Diagnostics
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if len(t) != 3 {
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diags = append(diags, &hcl.Diagnostic{
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Severity: hcl.DiagError,
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Summary: "Invalid " + sourceLabel + " reference",
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Detail: "A " + sourceLabel + " reference must have three parts separated by periods: the keyword \"" + sourceLabel + "\", the builder type name, and the source name.",
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Subject: t.SourceRange().Ptr(),
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})
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return NoSource, diags
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}
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if t.RootName() != sourceLabel {
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diags = append(diags, &hcl.Diagnostic{
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Severity: hcl.DiagError,
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Summary: "Invalid " + sourceLabel + " reference",
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Detail: "The first part of an source reference must be the keyword \"" + sourceLabel + "\".",
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Subject: t[0].SourceRange().Ptr(),
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})
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return NoSource, diags
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}
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btStep, ok := t[1].(hcl.TraverseAttr)
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if !ok {
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diags = append(diags, &hcl.Diagnostic{
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Severity: hcl.DiagError,
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Summary: "Invalid " + sourceLabel + " reference",
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Detail: "The second part of an " + sourceLabel + " reference must be an identifier giving the builder type of the " + sourceLabel + ".",
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Subject: t[1].SourceRange().Ptr(),
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})
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return NoSource, diags
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}
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nameStep, ok := t[2].(hcl.TraverseAttr)
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if !ok {
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diags = append(diags, &hcl.Diagnostic{
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Severity: hcl.DiagError,
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Summary: "Invalid " + sourceLabel + " reference",
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Detail: "The third part of an " + sourceLabel + " reference must be an identifier giving the name of the " + sourceLabel + ".",
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Subject: t[2].SourceRange().Ptr(),
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})
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return NoSource, diags
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}
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return SourceRef{
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Type: btStep.Name,
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Name: nameStep.Name,
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}, diags
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}
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func (r SourceRef) String() string {
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return fmt.Sprintf("%s.%s", r.Type, r.Name)
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}
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