What do you use mruby for? Is the use case purely for embedded systems?

[chengyil]

Just curious who and what people use mruby for. I think Matz originally intent it to be for embedded systems. But wonder if other people had others use cases.

[fundamental]

My use of mruby isn't quite an embedded system, but it is a constrained one. I've used mruby to build an open source GUI framework for audio plugins. i.e.:

These sorts of plugins face a number of challenges which restricts what they can do (embedded in a plugin host with a different toolkit) and since they display a lot of information in ways a typical toolkit doesn't directly approach. MRuby made it possible to build the framework and complex interface in a reasonable amount of time while still being usable as a final product and not just a rough prototype.

From looking at https://github.com/mruby/mgem-list you can see that there is an interest in web dev and system level utilities (among other things). For other uses, you might find some information at https://blog.mruby.sh/ .

@fundamental - nice; reminds me a bit of me using MRI just as a wrapper over ffmpeg. Your project obviously goes much further.

@chengyil - I can not say what all influenced matz in his decision back then but I believe that lua was one inspiration, in the sense as to make it easier to add ruby to a project, while being fast for that project (like when lua is used in some C++ games as embedded scripting language/interface).

I myself to not use mruby and the primary reason is because I don't know C/C++ very well. Another smaller reason is lack of time; I am mostly focusing to stay with MRI and my projects there for now. If, however had, I would have more time and knowledge then these are the areas I'd use mruby for:

• Something similar to busybox + a shell in ruby/mruby, in particular for recovery of systems. Additionally, to use mruby as an interface for compiling/installing software. I use MRI already as glue interface for compiling everything from source on my linux system and ruby works very well there. But there are lots of things I'd love to add. For example, paco/porg support for LD_PRELOAD; or being able to not have to run "configure" and have it check for files but instead use mruby/C to provide that information already as-is and caching every check so that it does not have to be re-run. Something like a compile/installation/build:system infrastructure (including a package manager).

Another area where I'd like to use mruby (and C/C++) would be related to bioinformatics. Ruby is great but it is a bit slow when loading big data files, e. g. genomic datasets from different organisms.

[take-cheeze]

Seems they are using it too: http://bip.cnrs-mrs.fr/bip06/qsoas/downloads.html

[felixjones]

I tend to use mruby as an alternative to Lua for application scripting languages. Lua does not have language support for classes & inheritance or the syntax flexibility that Ruby has.

Games is a good example of where this could be used, but I have also used it for helping with live debugging/testing my mobile Android applications (Bluetooth keyboard + Quake-style console + mruby).

Here's some ideas for single-line game commands:

Position.set x: 100, y: 110, z: 40 if Player.access == :admin
Time.set [12, 45, :pm]
Cheat.no_clip # toggle
Cheat.no_clip = true # set to true
Cheat.no_clip = false # set to false

I'm not actually sure how great mruby is for "very embedded" systems. The floating point dependency is what puts me off more than anything.

[asfluido]

After several years as a Ruby/C developer, I am now employed at the University of Bern, Switzerland (almost four years now), where I work on a (by now quite complex) system to run research tasks, based on a simple message-passing modular paradigm. When I arrived here I decided to give Mruby a try, and I am very happy of my choice.

The image shows an emulation of a so-called Gough-Stewart platform that I am currently working on. I developed everything, including the UI! All is in Ruby and C.

Carlo

[fourmond]

I use mruby for my data analysis program QSoas, which embeds Ruby as a language both for scripting and for entering mathematical formulas. The first versions relied on embedding the Ruby interpreter, but several very ugly build failures and later weirder segfaults lead me to look for an alternative.
mruby was naturally the best choice, keeping (almost) full compatibility.

[fourmond]

(thanks to take-cheeze to have spotted it !)

[scalone]

At CloudWalk we adopted mruby to Point Of Sale, purely embedded. Follow the talk: https://www.youtube.com/watch?v=vMjT2DqV_vw

…

-- Thiago Scalone +55 16 992-410-585 @scalone

On Wed, Sep 19, 2018 at 11:45 AM Vincent Fourmond ***@***.***> wrote: (thanks to take-cheeze to have spotted it !) — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#3962 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAGpf22ZVzMag68DeiArw02XZeI2FlPVks5uclh-gaJpZM4SXuh4> .

[boatrite]

I'm using mruby as the scripting engine for a voxel engine I'm working on for fun. The core engine is built with C++ which handles rendering (via OpenGL), multithreading, meshing, probably a few other things too, but the block definitions as well as world generation are done in mruby. I've only just recently added mruby, and the project itself is not very far along either, but it's a start and has been fun to work with.

[applesnake]

Embeded MRuby in C/C++ dynamic libraries used for JSON parsing，string processing, regular expression matching and so on.Ruby code also used to as 'data' for internal exchanging.Code is data，data is code。♪(^∇^*)

[Hir0]

We use mruby to IoT Platform. Libraries for Sensors, UART, GPS, I2C, Digital Io, GPIO, BLE, LoraWAN are developed by mruby.
http://plato.click (Sorry for Japanese only)

[kaz0505]

We are applying mruby for industrial robots. https://www.youtube.com/watch?v=f7e2wdcwIHE 2020年6月29日(月) 9:07 Hir0 <notifications@github.com>:

…

We use mruby to IoT Platform. Libraries for Sensors, UART, GPS, I2C, Digital Io, GPIO, BLE, LoraWAN are developed by mruby. http://plato.click (Sorry for Japanese only) — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#3962 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AADX5QYTKGUBI7KCARLEFU3RY7LLXANCNFSM4ES65B4A> .

-- -- Kyushu Institute of Technology -- Kazuaki Tanaka

[amirrajan]

We built a commercial game engine with mRuby as a component. Games have been released to iOS, Android, and the Nintendo Switch (with additional support for Raspberry Pi and WASM): https://dragonruby.org/toolkit/game/samples