Archive for April, 2012

Current Status of Libbash

Glad to see that libbash is accepted by Google Summer of Code this year. Congratulations to André Aparício! Petteri and I will both mentor this project during the summer. Before GSoC begins, I’d like to explain the current status of this project.

I worked on this project in GSoC 2011. After the summer ended, I spent months seeking a job so I didn’t pay much attention to the project at that time. And later, I made several commits to the project and it’s looking better.

So far, we can generate correct metadata for 13849 ebuilds (5435 more than before). Nearly half of the ebuilds in the main tree can be handled by libbash now. So the goal of this year’s GSoC is to make libbash be able to handle the rest of the ebuilds.

What’s stopping us from handling more ebuilds? There are several eclasses that our grammar file can not parse. That means any ebuild that inherits from these eclasses can not be handled by libbash. On the other hand, the runtime part is not fully implemented, which is due to lack of grammar support or low priority. I have to say it’s hard to tell all the problems we are facing at once. I have been working in this pattern for quite some time:
1. Use our implementation of instruo to generate metadata for the ebuilds in the main tree.
2. Sort the error output to see which errors are the biggest enemies.
3. Solve the problems that are figured out from the error output
Generating ebuild metadata will take about 10 minutes so this process is not fast. I need to solve as many problems as I can at one pass. Typically new errors will occur after I fix the old ones. And the new errors are not introduced by the new commits. They were just hidden by the old ones. That’s why it’s hard to move forward and handle more ebuilds in a short time.

In future, the error output should be improved so it would be easy for us to figure out more problems. After constantly working on the error output for some time, I’m sure we will get fewer errors and handle more ebuilds. Looking forward to seeing a working libbash for all the ebuilds at the end of this summer.

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