What is meaning/purpose of 'At' variable in ebuilds?

potsdamlemur

I've noticed many ebuild scripts define an 'At' variable. It's a synonym or close paraphrase of 'PN'. I've looked in the man 5 page, the ebuild HOW-TO, and searched forums and newsgroups ... no luck.

Is 'At' an informal or a formal convention? Either way, what is its intended purpose and proper use?

pjp · Posted: Wed May 28, 2003 6:39 pm Post subject:

Do you have an example ebuild that uses it?
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potsdamlemur

Sure. It seems quite popular in dev-java, but none in dev-db. In net-www it appears in orion and tomcat. I don't know about other categories; haven't checked. Here's a complete list from dev-java:

potsdamlemur

I should add that it appears to be some variation on the ${A} variable. man 5 ebuild says ${A} "contains all source files required for the package." However, ${A} is set automatically from ${SRC_URI} and should not be set explicitly, while ${At} is set explicitly. Also, some of the uses seem to indicate that ${At} is meant to hold only one filename. For example, in ibm-jdk-1.4.0-r2 we have:

pjp · Posted: Wed May 28, 2003 7:22 pm Post subject:

A little bird told me that the default function for src_unpack is to unpack ${A}, so "At" is likely A"temporary", but thats just a guess.

src_unpack for compaq-jdk-1.3.1.ebuild seems to agree with that guess though:

pjp · Posted: Wed May 28, 2003 7:23 pm Post subject:

you seem to have come to the same conclusion.
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potsdamlemur · Posted: Wed May 28, 2003 7:42 pm Post subject: Agreed.

Agreed. Proceeding on that assumption. Thanks.