/
writer.go
55 lines (44 loc) · 1.25 KB
/
writer.go
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package templates
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"text/template"
"golang.org/x/tools/imports"
)
// WriteTemplate executes the given templates with the given data.
// Then it writes the result in the output file.
// gofmt is used to format the output file.
func WriteTemplate(filename string, tmpl string, data interface{}) error {
if err := os.MkdirAll(filepath.Dir(filename), 0775); err != nil {
return fmt.Errorf("mkdir failed: %v", err)
}
content, err := ExecuteTemplate(tmpl, data)
if err != nil {
return err
}
content, err = imports.Process(filename, content, nil)
if err != nil {
return fmt.Errorf("formatting file failed: %v", err)
}
err = ioutil.WriteFile(filename, content, 0664)
if err != nil {
return fmt.Errorf("writing file failed: %v", err)
}
return nil
}
// ExecuteTemplate renders the given template.
func ExecuteTemplate(tmpl string, data interface{}) ([]byte, error) {
t, err := template.New("").Delims("<<<", ">>>").Parse(tmpl)
if err != nil {
return nil, fmt.Errorf("parsing template failed: %v", err)
}
buf := bytes.NewBuffer(nil)
err = t.ExecuteTemplate(buf, "base", data)
if err != nil {
return nil, fmt.Errorf("executing template failed: %v", err)
}
return buf.Bytes(), nil
}