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I reviewed roadmap #4 over two months ago. I noted that the project completely changed directions: instead of rewriting OSH in C++ with custom code generators, I shipped the Python prototype of OSH!
Since then, I've made a second release, but I haven't written a new roadmap yet. One reason for this is that I've been changing my mind about what to work on.
After the first release, I was burnt out by the long slog through a shell, so I decided to focus on Oil instead. I also promised that I would "re-sell" Oil, and focus on the message, which is:
Oil is your upgrade path from bash. It's the only language that shell / bash can be automatically converted to.
But after writing a few blog posts and drafting docs about the Oil language, I was ready to work on OSH again!
The meta-goal is to have some real users, whether they're for Oil or OSH. And right now OSH is closer to that goal, so I feel more motivated to work on it.
Running shell scripts found in the wild will focus me on the right goals. I expect to work on:
To be more specific:
(I explained this new direction on lobste.rs and /r/ProgrammingLanguages.)
I've been playing with Alpine Linux, and I like it. There's a 2500-line shell script that builds Alpine packages called abuild, and I believe it's a good motivating use case for OSH.
ashdialect, so this task is easier than running arbitrary bash.
/bin/bashas OSH (ambitious)
Then I could move onto runtime. e.g. booting an entire Alpine Linux system
/bin/sh as OSH.
Future blog topic: An Evaluation of Alpine Linux. Let me know if you don't understand why I chose it, or if you think another distro or shell project would be more appropriate for Oil.
There is a similar progression with shell dialects:
ash, which is a superset of POSIX shell.
The previous tasks are about grinding on OSH, but I'm also itching to work on the Oil language. It feels solid in my head, but unfortunately there's no implementation yet.
Because this work is further down the road, I'll point out some problems to solve here, without specifying solutions:
I'm itching to work on the OPy compiler as well. I believe it will help with many of these tasks.
I want to work on Oil, but I think attracting OSH users is better for both my motivation and for the health of the project.
That means finding a "carrot". Right now I believe the carrot is:
OSH is a better shell dialect for writing Linux distributions. It has the bash features you already use, but it's stricter and easier to debug.
Linux distributions appear to be the projects that stretch the shell language the furthest. In other words, they need the most help. Recall that some of the first scripts I parsed were related to Linux distros:
As mentioned, the carrot for Oil is that it's automatic conversion of bash to Oil, but unfortunately that goal is further off.
Also notice that I haven't mentioned anything about an interactive shell. Though I believe the OSH parser has a solid foundation for command completion, right now I'm picking my battles, and interactive features are also on the back burner.
This roadmap isn't as definitive as the previous ones, because at this point, what happens is determined by:
Let me know if these motivations make sense. And if you'd like to dip your toes in to the project without too much commitment, let me know as well.