Go i18n printer directly in templates?

[Marc Coquand]

Hi!

I am trying to more easily add text into my go html templates, that I
can translate at a later stage.

So I tried adding the following in my handler

```go
p := i18nPrinter(c) // *message.Printer, uses golang's i18n library
c.HTML(http.StatusOK, "my-template.tmpl", gin.H{
"p": p,
})
```

And then within my-template, I do the following to print a specific string.

```gohtml
<p>{{ .p.Sprintf "Hello world" }}</p>
```

And then to generate translations:

```sh
$ go generate i18n/i18n.go
```

I would expect "Hello world" to show up as a list of items that need
translations, however, it seems not to.

It'd be nice if I could add the Sprintf statements directly within the
go templates, as that would lower the indirection needed.

Is there a way to accomplish that? Or is it unsupported?

Sincerely,
--
Marc

[Howard C. Shaw III]

The x packages parse the .go files and work on the parsed tree of a specified package - so they see only what is visible at the go compiler level, and never see what is in templates that are outside of the go files.

Here is a StackOverflow on this topic, which suggests a library that does support extraction from templates.

https://stackoverflow.com/questions/62245560/i18n-support-for-golang-web-application-html-templates

Here is the library recommended in that question: 
https://github.com/vorlif/spreak

Here is the relevant bullet point from the Readme:

• Powerful extractor for strings to simplify the localization process (with support for templates)

Hope that helps,

Howard