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8df9e1ecf2
Code generation failres were hard to identify and undertand * avoid unnececary re-formating & memory allocation * return clear formatting errors
63 lines
1.8 KiB
Go
63 lines
1.8 KiB
Go
// Package generator provides facilities to generate Go code for the
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// package data in enry from YAML files describing supported languages in Linguist.
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package generator
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import (
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"fmt"
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"go/format"
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"io"
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"io/ioutil"
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"path/filepath"
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"strings"
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"text/template"
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)
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// File is a common type for all generator functions.
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// It generates Go source code file based on template in tmplPath,
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// by parsing the data in fileToParse and linguist's samplesDir
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// saving results to an outFile.
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type File func(fileToParse, samplesDir, outPath, tmplPath, tmplName, commit string) error
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func formatedWrite(outPath string, source []byte) error {
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formatedSource, err := format.Source(source)
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if err != nil {
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err = fmt.Errorf("'go fmt' fails on %v", err)
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// write un-formatter source to simplify debugging
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formatedSource = source
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}
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if err := ioutil.WriteFile(outPath, formatedSource, 0666); err != nil {
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return err
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}
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return err
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}
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func executeTemplate(w io.Writer, name, path, commit string, fmap template.FuncMap, data interface{}) error {
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getCommit := func() string {
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return commit
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}
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// stringVal returns escaped string that can be directly placed into go code.
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// for value test`s it would return `test`+"`"+`s`
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stringVal := func(val string) string {
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val = strings.ReplaceAll(val, "`", "`+\"`\"+`")
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return fmt.Sprintf("`%s`", val)
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}
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if fmap == nil {
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fmap = make(template.FuncMap)
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}
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fmap["getCommit"] = getCommit
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fmap["stringVal"] = stringVal
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fmap["isRE2"] = isRE2
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const headerTmpl = "header.go.tmpl"
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headerPath := filepath.Join(filepath.Dir(path), headerTmpl)
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h := template.Must(template.New(headerTmpl).Funcs(fmap).ParseFiles(headerPath))
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if err := h.Execute(w, data); err != nil {
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return err
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}
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t := template.Must(template.New(name).Funcs(fmap).ParseFiles(path))
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return t.Execute(w, data)
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}
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