I think the point is that he wants ${foo} to be the shell literal, not a (missing) asciidoc attribute reference.  So escaping the ${ as $\{ prevents asciidoc from interpreting the { in ${ as the start of an attribute.

David Jencks

On Feb 27, 2020, at 10:19 AM, mojavelinux [via Asciidoctor :: Discussion] <[hidden email]> wrote:

The warning is controlled by the attribute-missing attribute. By default, the value is "skip", which produces no warning for a missing attribute (and leaves it as typed). To get a warning, you must set attribute-missing to "warn". So check your settings to see what value is being used and adjust accordingly.

See https://asciidoctor.org/docs/user-manual/#missing-attribute

Best,

-Dan

On Thu, Feb 27, 2020 at 2:54 AM halol [via Asciidoctor :: Discussion] <<a href="x-msg://41/user/SendEmail.jtp?type=node&amp;node=7691&amp;i=0" target="_top" rel="nofollow" link="external" class="">[hidden email]> wrote:

Hello,

Is there a way to process a document such as the one below, without getting a warning?

The difficulty here is to mix shell variables (using the ${var} notation is a requirement) with asciidoctor attributes in the same block. The final output is fine, but I am getting a lot of warnings and sorting out which ones matter (actually missing asciidoctor attributes) and which one don't (shell variables) is not always easy.

# Test

:attribute-missing: warn

:ADOC_ATTR:      asciidoctor

[subs="attributes"]
----
SHELL_VAR="shell"

echo {ADOC_ATTR} ${SHELL_VAR}
----

In this case, the output is:

asciidoctor: WARNING: skipping reference to missing attribute: shell_var

Thanks.

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--

Dan Allen | @mojavelinux | https://twitter.com/mojavelinux

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