How to use custom functions in soy (closure template)

[thomasmu...@yahoo.com]

Hi, im wondering, how can i use a custom function in soy please? I am migrating from velocity to soy but carn't seem to get functions to work.

I am doing something like {$its.formatLink($changeUrl)}

https://gerrit-review.googlesource.com/?polygerrit=0#/c/plugins/its-base/+/108215/17/src/main/java/com/googlesource/gerrit/plugins/its/base/workflow/action/AddSoyComment.java@139

[Mike Samuel]

SoyFunction is in a "restricted" package as are the backend-specific
sub-interfaces so they're not part of the supported public API as
such.

What does formatLink do that can't be done in a template?
Why can't the link be formatted prior to template rendering and
included in the template input?

[thomasmu...@yahoo.com]

Oh, i am wondering how do i create a custom plugin function for soy, per comment here https://github.com/google/closure-templates/issues/144 please?

How do i do that in https://gerrit-review.googlesource.com/#/c/plugins/its-base/+/108215/35/src/main/java/com/googlesource/gerrit/plugins/its/base/workflow/action/AddSoyComment.java as i am not sure how to use guice, but in velocity you did something like 

https://github.com/GerritCodeReview/plugins_its-base/blob/master/src/main/java/com/googlesource/gerrit/plugins/its/base/workflow/action/AddVelocityComment.java#L82

https://github.com/GerritCodeReview/plugins_its-base/blob/master/src/main/java/com/googlesource/gerrit/plugins/its/base/workflow/action/AddVelocityComment.java#L128