Project Description
Currently we are in a situation with libzypp where we have a C++ based and hard to use API. Due to the nature of C++ it's basically impossible to use it from other languages like Rust or even Python.
In the last hackweek I layed the grounds for calling into libzypp via GLib, so I'm going to improve on that trying to wrap the legacy reports into a new style report API and maybe expose more functionality.
Goal for this Hackweek
- Wrap new C++ event API in GLib-C
- Catch and forward legacy reports via said API
- Expose more functionality as we go
I already started to look into it, development will be done here: https://github.com/bzeller/libzypp/tree/zyppng-api
Resources
Looking for hackers with the skills:
This project is part of:
Hack Week 22 Hack Week 23
Activity
Comments
-
over 2 years ago by zbenjamin | Reply
So during the hackweek I managed to set up a very basic GObject based API that is able to initialize libzypp, list the names of all currenty known repositories and use the new async libzypp API to download a file. This is a good start and we should be able to build on it.
You can see the resulting python script that is controlling libzypp here
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"autoremove" functionality for zypper by e_bischoff
The purpose would be to have the equivalent of Ubuntu's "apt-get autoremove" functionality.
When you install package P, it might draw in dependancies D1, D2, ... Dn automatically.
When you later uninstall P, the dependancies D1, D2, ..., Dn might remain on your system.
If you keep installing and uninstalling packages, after a while your system remains cluttered with things you don't need.
The idea would be to mark all dependancies that were installed but not explicitely requested as "installed automatically". Then a command like "zypper autoremove" could remove them at once if they are not needed anymore.
Approaches seen online
After scouring forms for solutions these are some alias's used to replicate the functionality
zypper packages --unneeded | awk -F'|' 'NR==0 || NR==1 || NR==2 || NR==3 || NR==4 {next} {print $3}' | grep -v Name | sudo xargs zypper remove --clean-deps
This one is a script and has bashisms
bash mapfile -t unneeded < <(zypper --quiet pa --unneeded | awk '$1 == "i" { print $5, "-", $7 }') (( ${#unneeded@]} )) && sudo zypper --quiet rm --clean-deps --details "${unneeded@]}"
sudo zypper rm $(zypper pa --unneeded | awk '/i / {print $3}' FS='|' | uniq | tr -d ' ')
Based on testing zypper packages --orphaned
provides packages that are not in any repo, even if a user has explicitly installed them, so --orphaned
may not be the way to go, instead focusing on --unneeded
Ansible for add-on management by lmanfredi
Description
Machines can contains various combinations of add-ons and are often modified during the time.
The list of repos can change so I would like to create an automation able to reset the status to a given state, based on metadata available for these machines
Goals
Create an Ansible automation able to take care of add-on (repo list) configuration using metadata as reference
Resources
- Machines
- Repositories
- Developing modules
- Basic VM Guest management
- Module
zypper_repository_list
- ansible-collections community.general
Results
Created WIP project Ansible-add-on-openSUSE
ESETv2 Emulator / interpreter by m.crivellari
Description
ESETv2 is an intriguing challenge developed by ESET, available on their website under the "Challenge" menu.
The challenge involves an "assembly-like" language and a Python compiler that generates .evm
binary files.
This is an example using one of their samples (it prints N Fibonacci numbers):
.dataSize 0
.code
loadConst 0, r1 # first
loadConst 1, r2 # second
loadConst 1, r14 # loop helper
consoleRead r3
loop:
jumpEqual end, r3, r15
add r1, r2, r4
mov r2, r1
mov r4, r2
consoleWrite r1
sub r3, r14, r3
jump loop
end:
hlt
This language also supports multi-threading. It includes instructions such as createThread
to start a new thread, joinThread
to wait until a thread completes, and lock
/unlock
to facilitate synchronization between threads.
Goals
- create a full interpreter able to run all the available samples provided by ESET.
- improve / optimize memory (eg. using bitfields where needed as well as avoid unnecessary memory allocations)
Resources
- Challenge URL: https://join.eset.com/en/challenges/core-software-engineer
- My github project: https://github.com/DispatchCode/eset_vm2 (not 100% complete)
Achivements
Project still not complete. Added lock / unlock instruction implementation but further debug is needed; there is a bug somewhere. Actually the code it works for almost all the examples in the samples folder. 1 of them is not yet runnable (due to a missing "write" opcode implementation), another will cause the bug to show up; still not investigated, anyhow.
FizzBuzz OS by mssola
Project Description
FizzBuzz OS (or just fbos
) is an idea I've had in order to better grasp the fundamentals of the low level of a RISC-V machine. In practice, I'd like to build a small Operating System kernel that is able to launch three processes: one that simply prints "Fizz", another that prints "Buzz", and the third which prints "FizzBuzz". These processes are unaware of each other and it's up to the kernel to schedule them by using the timer interrupts as given on openSBI (fizz on % 3 seconds, buzz on % 5 seconds, and fizzbuzz on % 15 seconds).
This kernel provides just one system call, write
, which allows any program to pass the string to be written into stdout.
This project is free software and you can find it here.
Goal for this Hackweek
- Better understand the RISC-V SBI interface.
- Better understand RISC-V in privileged mode.
- Have fun.
Resources
Results
The project was a resounding success Lots of learning, and the initial target was met.
Add a machine-readable output to dmidecode by jdelvare
Description
There have been repeated requests for a machine-friendly dmidecode output over the last decade. During Hack Week 19, 5 years ago, I prepared the code to support alternative output formats, but didn't have the time to go further. Last year, Jiri Hnidek from Red Hat Linux posted a proof-of-concept implementation to add JSON output support. This is a fairly large pull request which needs to be carefully reviewed and tested.
Goals
Review Jiri's work and provide constructive feedback. Merge the code if acceptable. Evaluate the costs and benefits of using a library such as json-c.
FastFileCheck work by pstivanin
Description
FastFileCheck is a high-performance, multithreaded file integrity checker for Linux. Designed for speed and efficiency, it utilizes parallel processing and a lightweight database to quickly hash and verify large volumes of files, ensuring their integrity over time.
https://github.com/paolostivanin/FastFileCheck
Goals
- Release v1.0.0
Design overwiew:
- Main thread (producer): traverses directories and feeds the queue (one thread is more than enough for most use cases)
- Dedicated consumer thread: manages queue and distributes work to threadpool
- Worker threads: compute hashes in parallel
This separation of concerns is efficient because:
- Directory traversal is I/O bound and works well in a single thread
- Queue management is centralized, preventing race conditions
- Hash computation is CPU-intensive and properly parallelized
YQPkg - Bringing the Single Package Selection Back to Life by shundhammer
tl;dr
Rip out the high-level YQPackageSelector widget from YaST and make it a standalone Qt program without any YaST dependencies.
See section "Result" at the bottom for the current status after the hack week.
The Past and the Present
We used to have and still have a powerful software selection with the YaST sw_single module (and the YaST patterns counterpart): You can select software down to the package level, you can easily select one of many available package versions, you can select entire patterns - or just view them and pick individual packages from patterns.
You can search packages based on name, description, "requires" or "provides" level, and many more things.
The Future
YaST is on its way out, to be replaced by the new Agama installer and Cockpit for system administration. Those tools can do many things, but fine-grained package selection is not among them. And there are also no other Open Source tools available for that purpose that even come close to the YaST package selection.
Many aspects of YaST have become obsolete over the years; many subsystems now come with a good default configuration, or they can configure themselves automatically. Just think about sound or X11 configuration; when did you last need to touch them?
For others, the desktops bring their own tools (e.g. printers), or there are FOSS configuration tools (NetworkManager, BlueMan). Most YaST modules are no longer needed, and for many others there is a replacement in tools like Cockpit.
But no longer having a powerful fine-grained package selection like in YaST sw_single will hurt. Big time. At least until there is an adequate replacement, many users will want to keep it.
The Idea
YaST sw_single always revolved around a powerful high-level widget on the abstract UI level. Libyui has low-level widgets like YPushButton, YCheckBox, YInputField, more advanced ones like YTable, YTree; and some few very high-level ones like YPackageSelector and YPatternSelector that do the whole package selection thing alone, working just on the libzypp level and changing the status of packages or patterns there.
For the YaST Qt UI, the YQPackageSelector / YQPatternSelector widgets work purely on the Qt and libzypp level; no other YaST infrastructure involved, in particular no Ruby (or formerly YCP) interpreter, no libyui-level widgets, no bindings between Qt / C++ and Ruby / YaST-core, nothing. So it's not too hard to rip all that part out of YaST and create a standalone program from it.
For the NCurses UI, the NCPackageSelector / NCPatternSelector create a lot of libyui widgets (inheriting YWidget / NCWidget) and use a lot of libyui calls to glue them together; and all that of course still needs a lot of YaST / libyui / libyui-ncurses infrastructure. So NCurses is out of scope here.
Preparatory Work: Initializing the Package Subsystem
To see if this is feasible at all, the existing UI examples needed some fixing to check what is needed on that level. That was the make-or-break decision: Would it be realistically possible to set the needed environment in libzypp up (without being stranded in the middle of that task alone at the end of the hack week)?
Yes, it is: That part is already working:
https://github.com/yast/yast-ycp-ui-bindings/pull/71
Go there for a screenshot
That's already halfway there.
The complete Ruby code of this example is here. The real thing will be pure C++ without any YaST dependencies.
The Plan
RISC-V emulator in GLSL capable of running Linux by favogt
Description
There are already numerous ways to run Linux and some programs through emulation in a web browser (e.g. x86 and riscv64 on https://bellard.org/jslinux/), but none use WebGL/WebGPU to run the emulation on the GPU.
I already made a PoC of an AArch64 (64-bit Arm) emulator in OpenCL which is unfortunately hindered by a multitude of OpenCL compiler bugs on all platforms (Intel with beignet or the new compute runtime and AMD with Mesa Clover and rusticl). With more widespread and thus less broken GLSL vs. OpenCL and the less complex implementation requirements for RV32 (especially 32bit integers instead of 64bit), that should not be a major problem anymore.
Goals
Write an RISC-V system emulator in GLSL that is capable of booting Linux and run some userspace programs interactively. Ideally it is small enough to work on online test platforms like Shaderoo with a custom texture that contains bootstrap code, kernel and initrd.
Minimum:
riscv32 without FPU (RV32 IMA) and MMU (µClinux), running Linux in M-mode and userspace in U-mode.
Stretch goals:
FPU support, S-Mode support with MMU, SMP. Custom web frontend with more possibilities for I/O (disk image, network?).
Resources
RISC-V ISA Specifications
Shaderoo
OpenGL 4.5 Quick Reference Card
Result as of Hackweek 2024
WebGL turned out to be insufficient, it only supports OpenGL ES 3.0 but imageLoad/imageStore needs ES 3.1. So we switched directions and had to write a native C++ host for the shaders.
As of Hackweek Friday, the kernel attempts to boot and outputs messages, but panics due to missing memory regions.
Since then, some bugs were fixed and enough hardware emulation implemented, so that now Linux boots with framebuffer support and it's possible to log in and run programs!
The repo with a demo video is available at https://github.com/Vogtinator/risky-v
Port some classic game to Linux by MDoucha
Let's pick some old classic game, reverse engineer the data formats and game rules and write an open source engine for it from scratch. Some games from 1990s are simple enough that we could have a playable prototype by the end of the week.
Write which games you'd like to hack on in the comments. Don't forget to check e.g. on Open Source Game Clones, Github and SourceForge whether the game is ported already.
Hack Week 24 - Master of Orion II: Battle at Antares & Chaos Overlords
Work on Master of Orion II continues but we can hack more than one game. Chaos Overlords is a dystopian, lighthearted, cyberpunk turn-based strategy game originally released in 1996 for Windows 95 and Mac OS. The player takes on the role of a Chaos Overlord, attempting to control a city. Gameplay involves hiring mercenary gangs and deploying them on an 8-by-8 grid of city sectors to generate income, occupy sectors and take over the city.
How to ~~install & play~~ observe the decompilation progress:
- Clone the Git repository
- A playable reimplementation does not exist yet, but when it does, it will be linked in the repository mentioned above.
Further work needed:
- Analyze the remaining unknown data structures, most of which are related to the AI.
- Decompile the AI completely. The strong AI is part of the appeal of the game. It cannot be left out.
- Reimplement the game.
Hack Week 20, 21, 22 & 23 - Master of Orion II: Battle at Antares
Master of Orion II is one of the greatest turn-based 4X games of the 1990s. Explore the galaxy, colonize planets, research new technologies, fight space monsters and alien empires and in the end, become the ruler of the galaxy one way or another.
How to install & play:
- Clone the Git repository
- Run
./bootstrap; ./configure; make && make install
- Copy all *.LBX files from the original Master of Orion II to the installation data directory (
/usr/local/share/openorion2
by default) - Run
openorion2
Further work needed:
- Analyze the rest of the original savegame format and a few remaining data files.
- Implement most of the game. The open source engine currently supports only loading saved games from the original version and viewing the galaxy map, fleet management and list of known planets.
Hack Week 19 - Signus: The Artifact Wars
Signus is a Czech turn-based strategy game similar to Panzer General or Battle Isle series. Originally published in 1998 and open-sourced by the original developers in 2003.
How to install & play:
- Clone the Git repository
- Run
./bootstrap; ./configure; make && make install
in bothsignus
andsignus-data
directories. - Run
signus
Further work needed:
- Create openSUSE package
- Implement full support for original game data (the open source version uses slightly different data file contents but original game data can be converted using a script).
New KDE Plasma notification app/applet by apappas
Description
My memory is terrible so I depend a lot on notifications to carry me through the workday. As a plasma user I am ok with the current applet, but I don't love it. It is too small for the centrality it has in my day. Also I dislike how you can not go back to notifications you have dismissed
Goals
Develop a plasma app that * must gather notifications without disrupting the existing notification app * must offer the ablity to refer to dismissed/archived/seen notification up to some defined point in the past * must allow deletion of notifications