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cue/encoding: add package
Change-Id: I9307816b073eca99ea7cf94631866d2f1f5d2782
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cue/encoding/encoding.go
+54
cue/encoding/encoding.go
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// Copyright 2018 The CUE Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package encoding provides support for managing data format files supported
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// by CUE.
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package encoding // import "cuelang.org/go/cue/encoding"
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import "strings"
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// Encoding represents a data encoding.
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type Encoding struct {
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name string
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}
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// Name returns a lowercase name of an encoding. This is conventionally the most
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// common file extension in lower case.
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func (e *Encoding) Name() string {
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return e.name
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}
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// All returns all known encodings.
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func All() []*Encoding {
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return []*Encoding{jsonEnc, yamlEnc}
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}
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// MapExtension returns the likely encoding for a given file extension.
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func MapExtension(ext string) *Encoding {
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return extensions[strings.ToLower(ext)]
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}
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var (
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jsonEnc = &Encoding{name: "json"}
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yamlEnc = &Encoding{name: "yaml"}
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)
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// extensions maps a file extension to a Kind.
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var extensions = map[string]*Encoding{
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".json": jsonEnc,
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".jsonl": jsonEnc,
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".ndjson": jsonEnc,
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".yaml": yamlEnc,
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".yml": yamlEnc,
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}