Eclipse Community Forums: TMF (Xtext) » Cascading Xtext Generators

Help

Home

Home » Modeling » TMF (Xtext) » Cascading Xtext Generators

Show: Today's Messages :: Show Polls :: Message Navigator

Cascading Xtext Generators [message #1849879]

Mon, 07 February 2022 09:19

Ulrich Großmann

Messages: 2
Registered: February 2022

Junior Member

Hi,

I have two independent Xtext DSLs A and B. The generator of A generates files for B. B generates java files.

A -> B -> java

Is it possible that Eclipse automatically calls the generator of DSL B after DSL A generated a file or a bunch of files? If yes, how is this achieved?

In my current Configuration DSL A generates the files but the Generator of B is not called. If i touch the generated .b files manually it works. I use Xtext version 2.23.0.

Best regards,
Uli

Report message to a moderator

Re: Cascading Xtext Generators [message #1849888 is a reply to message #1849879]

Mon, 07 February 2022 15:19

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

no, you would need second programmatic toucher / custom touching builder. builders dont see files they generate themselves.

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

Report message to a moderator

Re: Cascading Xtext Generators [message #1849889 is a reply to message #1849879]

Mon, 07 February 2022 15:19

Karsten Thoms

Messages: 762
Registered: July 2009
Location: Dortmund, Germany

Senior Member

It is a bit tricky. I did this once back in a project. The basic problem is that one execution that generates files can't automatically see that relevant files have been produced that require a second run.

What you need to do is basically what you are doing manually: After one execution refresh the produced files.

If I remember correctly, we kept track of produced files and then started a job after finishing the first run that refreshed the produced workspace resources. Note that you need to decouple the runs.

Sorry, can't share code, only the idea.

Report message to a moderator

Re: Cascading Xtext Generators [message #1849908 is a reply to message #1849879]

Tue, 08 February 2022 11:29

Ulrich Großmann

Messages: 2
Registered: February 2022

Junior Member

Thanks guys, that did the trick!

I implemented a custom BuilderParticipant and added it to my UiModule. At the end of doBuild all generated files are touched.

For touching i use the touch method of com.google.common.io.Files. Is this a good idea? Is there a better way of touching files inside Eclipse?

I tried org.eclipse.core.resources.IFile.touch but nothing happened.

Thanks,
Uli

Report message to a moderator