How to use easygen API

easygen's API has been the same since V2. I.e., use easygen.NewTemplate() to init a new template:

        tmpl := easygen.NewTemplate().Funcs(easygen.FuncDefs())

then use easygen.Execute():

	err := easygen.Execute(tmpl, os.Stdout, templateFile, settingVar)

Or, to get the result into variable, use the following:

        buf := new(bytes.Buffer)
        err := easygen.Execute(tmpl, buf, templateFile, settingVar)
        check(err)
        return buf.String()

to directly use template string instead of template file, use the following:

        buf := new(bytes.Buffer)
        err := easygen.Process0(tmpl, buf, templateStr, yamlFileName)

See also,

• https://github.com/go-easygen/easygen/wiki/V2-vs-V1
• https://github.com/go-easygen/easygen/blob/8022ae39b5b2aa9001f159eeabaa82c7d010474d/example_test.go#L12-L29