57 lines
1.2 KiB
Go
57 lines
1.2 KiB
Go
package jsonnet
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import (
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"bytes"
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"github.com/drone/drone/core"
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"github.com/google/go-jsonnet"
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)
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func Parse(req *core.ConvertArgs, template *core.Template, templateData map[string]interface{}) (string, error) {
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// create the jsonnet vm
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vm := jsonnet.MakeVM()
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vm.MaxStack = 500
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vm.StringOutput = false
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vm.ErrorFormatter.SetMaxStackTraceSize(20)
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var jsonnetFile string
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var jsonentFileName string
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if template != nil {
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jsonnetFile = template.Data
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jsonentFileName = template.Name
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} else {
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jsonnetFile = req.Config.Data
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jsonentFileName = req.Repo.Config
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}
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// map external inputs
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if len(templateData) != 0 {
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for k, v := range templateData {
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if s, ok := v.(string); ok {
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key := "input." + k
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vm.ExtVar(key, s)
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}
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}
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}
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// convert the jsonnet file to yaml
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buf := new(bytes.Buffer)
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docs, err := vm.EvaluateSnippetStream(jsonentFileName, jsonnetFile)
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if err != nil {
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doc, err2 := vm.EvaluateSnippet(jsonentFileName, jsonnetFile)
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if err2 != nil {
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return "", err
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}
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docs = append(docs, doc)
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}
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// the jsonnet vm returns a stream of yaml documents
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// that need to be combined into a single yaml file.
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for _, doc := range docs {
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buf.WriteString("---")
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buf.WriteString("\n")
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buf.WriteString(doc)
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}
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return buf.String(), nil
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}
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