56 lines
1.5 KiB
Go
56 lines
1.5 KiB
Go
package configs
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import (
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"github.com/hashicorp/hcl/v2"
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"github.com/hashicorp/hcl/v2/hcldec"
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"github.com/hashicorp/terraform/internal/configs/configschema"
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"github.com/zclconf/go-cty/cty"
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)
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// Backend represents a "backend" block inside a "terraform" block in a module
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// or file.
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type Backend struct {
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Type string
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Config hcl.Body
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TypeRange hcl.Range
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DeclRange hcl.Range
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}
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func decodeBackendBlock(block *hcl.Block) (*Backend, hcl.Diagnostics) {
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return &Backend{
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Type: block.Labels[0],
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TypeRange: block.LabelRanges[0],
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Config: block.Body,
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DeclRange: block.DefRange,
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}, nil
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}
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// Hash produces a hash value for the reciever that covers the type and the
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// portions of the config that conform to the given schema.
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//
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// If the config does not conform to the schema then the result is not
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// meaningful for comparison since it will be based on an incomplete result.
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//
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// As an exception, required attributes in the schema are treated as optional
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// for the purpose of hashing, so that an incomplete configuration can still
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// be hashed. Other errors, such as extraneous attributes, have no such special
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// case.
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func (b *Backend) Hash(schema *configschema.Block) int {
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// Don't fail if required attributes are not set. Instead, we'll just
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// hash them as nulls.
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schema = schema.NoneRequired()
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spec := schema.DecoderSpec()
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val, _ := hcldec.Decode(b.Config, spec, nil)
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if val == cty.NilVal {
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val = cty.UnknownVal(schema.ImpliedType())
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}
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toHash := cty.TupleVal([]cty.Value{
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cty.StringVal(b.Type),
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val,
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})
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return toHash.Hash()
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}
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