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0729e9fdd7
* configs/configschema: extend block.AttributeByPath to descend into Objects This commit adds a recursive Object.AttributeByPath function which will step through Attributes with NestedTypes. If an Attribute without a NestedType is encountered while there is still more to the path, it will return nil.
56 lines
1.6 KiB
Go
56 lines
1.6 KiB
Go
package configschema
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import (
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"github.com/zclconf/go-cty/cty"
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)
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// AttributeByPath looks up the Attribute schema which corresponds to the given
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// cty.Path. A nil value is returned if the given path does not correspond to a
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// specific attribute.
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func (b *Block) AttributeByPath(path cty.Path) *Attribute {
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block := b
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for i, step := range path {
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switch step := step.(type) {
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case cty.GetAttrStep:
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if attr := block.Attributes[step.Name]; attr != nil {
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// If the Attribute is defined with a NestedType and there's
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// more to the path, descend into the NestedType
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if attr.NestedType != nil && i < len(path)-1 {
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return attr.NestedType.AttributeByPath(path[i+1:])
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} else if i < len(path)-1 { // There's more to the path, but not more to this Attribute.
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return nil
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}
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return attr
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}
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if nestedBlock := block.BlockTypes[step.Name]; nestedBlock != nil {
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block = &nestedBlock.Block
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continue
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}
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return nil
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}
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}
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return nil
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}
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// AttributeByPath recurses through a NestedType to look up the Attribute scheme
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// which corresponds to the given cty.Path. A nil value is returned if the given
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// path does not correspond to a specific attribute.
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func (o *Object) AttributeByPath(path cty.Path) *Attribute {
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for i, step := range path {
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switch step := step.(type) {
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case cty.GetAttrStep:
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if attr := o.Attributes[step.Name]; attr != nil {
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if attr.NestedType != nil && i < len(path)-1 {
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return attr.NestedType.AttributeByPath(path[i+1:])
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} else if i < len(path)-1 { // There's more to the path, but not more to this Attribute.
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return nil
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}
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return attr
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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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