tartrazine/internal/code-generator/generator/interpreters.go

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package generator
import (
"bytes"
"io"
"strings"
"text/template"
"gopkg.in/yaml.v2"
)
// Interpreters reads from buf and builds interpreters_map.go file from interpretersTmplPath.
func Interpreters(data []byte, interpretersTmplPath, interpretersTmplName, commit string) ([]byte, error) {
languages := make(map[string]*languageInfo)
if err := yaml.Unmarshal(data, &languages); err != nil {
return nil, err
}
orderedKeys := getAlphabeticalOrderedKeys(languages)
languagesByInterpreter := buildInterpreterLanguagesMap(languages, orderedKeys)
buf := &bytes.Buffer{}
if err := executeInterpretersTemplate(buf, languagesByInterpreter, interpretersTmplPath, interpretersTmplName, commit); err != nil {
return nil, err
}
return buf.Bytes(), nil
}
func buildInterpreterLanguagesMap(languages map[string]*languageInfo, orderedKeys []string) map[string][]string {
interpreterLangsMap := make(map[string][]string)
for _, lang := range orderedKeys {
langInfo := languages[lang]
for _, interpreter := range langInfo.Interpreters {
interpreterLangsMap[interpreter] = append(interpreterLangsMap[interpreter], lang)
}
}
return interpreterLangsMap
}
func executeInterpretersTemplate(out io.Writer, languagesByInterpreter map[string][]string, interpretersTmplPath, interpretersTmpl, commit string) error {
fmap := template.FuncMap{
"getCommit": func() string { return commit },
"formatStringSlice": func(slice []string) string { return `"` + strings.Join(slice, `","`) + `"` },
}
t := template.Must(template.New(interpretersTmpl).Funcs(fmap).ParseFiles(interpretersTmplPath))
if err := t.Execute(out, languagesByInterpreter); err != nil {
return err
}
return nil
}