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template.go
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/
template.go
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package interfacegen
import (
"bytes"
"html"
"html/template"
"log"
"golang.org/x/tools/imports"
)
type templateParam struct {
Name string
PackageName string
Methods []string
Comment string
}
func MakeInterface(pkgName, name, comment string, methods []string) ([]byte, error) {
baseTemplate := `
package {{.PackageName}}
// {{.Comment}}
type {{.Name}} interface {
{{range $_, $method := .Methods}}
{{$method}}
{{- end}}
}
`
tmpl := template.Must(template.New("interface").Parse(baseTemplate))
var buf bytes.Buffer
tp := templateParam{
PackageName: pkgName,
Name: name,
Methods: methods,
Comment: comment,
}
err := tmpl.Execute(&buf, tp)
if err != nil {
log.Fatal(err)
}
res := buf.String()
res = html.UnescapeString(res)
return format(res)
}
func format(code string) ([]byte, error) {
opts := &imports.Options{
TabIndent: true,
TabWidth: 4,
Fragment: true,
Comments: true,
}
return imports.Process("", []byte(code), opts)
}