drone-yaml/yaml/compiler/encode.go

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// Copyright 2019 Drone IO, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
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package compiler
import (
"encoding/base64"
"strconv"
"strings"
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"github.com/buildkite/yaml"
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json "github.com/ghodss/yaml"
)
// helper funciton encodes an interface value as a string.
// this function assumes all types were unmarshaled by the
// yaml.v2 library. The yaml.v2 package only supports a
// subset of primative types.
func encode(v interface{}) string {
switch v := v.(type) {
case string:
return v
case bool:
return strconv.FormatBool(v)
case int:
return strconv.Itoa(v)
case float64:
return strconv.FormatFloat(v, 'g', -1, 64)
case []byte:
return base64.StdEncoding.EncodeToString(v)
case []interface{}:
return encodeSlice(v)
default:
return encodeMap(v)
}
}
// helper function encodes a parameter in map format.
func encodeMap(v interface{}) string {
yml, _ := yaml.Marshal(v)
out, _ := json.YAMLToJSON(yml)
return string(out)
}
// helper function encodes a parameter in slice format.
func encodeSlice(v interface{}) string {
out, _ := yaml.Marshal(v)
in := []string{}
err := yaml.Unmarshal(out, &in)
if err == nil {
return strings.Join(in, ",")
}
out, _ = json.YAMLToJSON(out)
return string(out)
}