82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
// Package file implements decoding between configuration in a file and a typed Configuration.
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package file
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import (
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"fmt"
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"github.com/BurntSushi/toml"
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"github.com/containous/traefik/v2/pkg/config/parser"
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"gopkg.in/yaml.v2"
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)
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// Decode decodes the given configuration file into the given element.
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// The operation goes through three stages roughly summarized as:
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// file contents -> tree of untyped nodes
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// untyped nodes -> nodes augmented with metadata such as kind (inferred from element)
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// "typed" nodes -> typed element.
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func Decode(filePath string, element interface{}) error {
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if element == nil {
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return nil
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}
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filters := getRootFieldNames(element)
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root, err := decodeFileToNode(filePath, filters...)
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if err != nil {
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return err
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}
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metaOpts := parser.MetadataOpts{TagName: parser.TagFile, AllowSliceAsStruct: false}
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err = parser.AddMetadata(element, root, metaOpts)
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if err != nil {
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return err
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}
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return parser.Fill(element, root, parser.FillerOpts{AllowSliceAsStruct: false})
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}
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// DecodeContent decodes the given configuration file content into the given element.
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// The operation goes through three stages roughly summarized as:
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// file contents -> tree of untyped nodes
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// untyped nodes -> nodes augmented with metadata such as kind (inferred from element)
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// "typed" nodes -> typed element.
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func DecodeContent(content, extension string, element interface{}) error {
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data := make(map[string]interface{})
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switch extension {
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case ".toml":
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_, err := toml.Decode(content, &data)
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if err != nil {
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return err
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}
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case ".yml", ".yaml":
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var err error
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err = yaml.Unmarshal([]byte(content), &data)
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if err != nil {
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return err
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}
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default:
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return fmt.Errorf("unsupported file extension: %s", extension)
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}
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filters := getRootFieldNames(element)
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node, err := decodeRawToNode(data, parser.DefaultRootName, filters...)
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if err != nil {
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return err
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}
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if len(node.Children) == 0 {
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return nil
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}
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metaOpts := parser.MetadataOpts{TagName: parser.TagFile, AllowSliceAsStruct: false}
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err = parser.AddMetadata(element, node, metaOpts)
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if err != nil {
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return err
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}
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return parser.Fill(element, node, parser.FillerOpts{AllowSliceAsStruct: false})
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}
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