github.com/dennwc/enry@v1.6.4-0.20180424151738-42391b8e105b/internal/code-generator/generator/interpreters.go (about) 1 package generator 2 3 import ( 4 "bytes" 5 "io" 6 "io/ioutil" 7 "strings" 8 "text/template" 9 10 "gopkg.in/yaml.v2" 11 ) 12 13 // Interpreters reads from fileToParse and builds source file from tmplPath. It complies with type File signature. 14 func Interpreters(fileToParse, samplesDir, outPath, tmplPath, tmplName, commit string) error { 15 data, err := ioutil.ReadFile(fileToParse) 16 if err != nil { 17 return err 18 } 19 20 languages := make(map[string]*languageInfo) 21 if err := yaml.Unmarshal(data, &languages); err != nil { 22 return err 23 } 24 25 orderedKeys := getAlphabeticalOrderedKeys(languages) 26 languagesByInterpreter := buildInterpreterLanguagesMap(languages, orderedKeys) 27 28 buf := &bytes.Buffer{} 29 if err := executeInterpretersTemplate(buf, languagesByInterpreter, tmplPath, tmplName, commit); err != nil { 30 return err 31 } 32 33 return formatedWrite(outPath, buf.Bytes()) 34 } 35 36 func buildInterpreterLanguagesMap(languages map[string]*languageInfo, orderedKeys []string) map[string][]string { 37 interpreterLangsMap := make(map[string][]string) 38 for _, lang := range orderedKeys { 39 langInfo := languages[lang] 40 for _, interpreter := range langInfo.Interpreters { 41 interpreterLangsMap[interpreter] = append(interpreterLangsMap[interpreter], lang) 42 } 43 } 44 45 return interpreterLangsMap 46 } 47 48 func executeInterpretersTemplate(out io.Writer, languagesByInterpreter map[string][]string, tmplPath, tmplName, commit string) error { 49 fmap := template.FuncMap{ 50 "getCommit": func() string { return commit }, 51 "formatStringSlice": func(slice []string) string { return `"` + strings.Join(slice, `","`) + `"` }, 52 } 53 54 t := template.Must(template.New(tmplName).Funcs(fmap).ParseFiles(tmplPath)) 55 if err := t.Execute(out, languagesByInterpreter); err != nil { 56 return err 57 } 58 59 return nil 60 }