FLOSS Project Planets
Russell Coker: Links September 2024
CNA Insider has an insightful documentary series about Chinese illegal immigrants to the US [1]. They should migrate to Australia, easier to get in and a better place to live.
Linus tech tips has an informative video about using Windows on Snapdragon ARM64 laptops. [2]. Maybe I should get one for running Linux. They are quite expensive on ebay now which is presumably a good sign about their quality.
A web site for comparing monospace fonts so you can find the one that best suits yuor coding [3]. Roboto works well for me.
Insightful lecture by Grace Hopper (then Captain) about the future of computers [5]. The second part is linked from the first part. Published by the NSA.
Tony Hoare gave an insightful lecture titled “The Billion Dollar Mistake” about his work on designing the Algol language in 1965 [6]. The lecture was recorded in about 2005. But it still has a lot of relevance to computer science.
Cory Doctorow wrote an insightful article on the Marshmallow test and long term thinking [8]. The rich fail this test badly.
Cory Doctorow wrote an informative article about Google’s practices of deleting Gmail accounts for no apparent reason and denying people access to their data [10]. We need more laws like the Digital Markets Act in the EU and we need them to apply to eBay/PayPal and AWS/Amazon.
- [1] https://tinyurl.com/22x27vdt
- [2] https://www.youtube.com/watch?v=zFMTJm3vmh0
- [3] https://www.codingfont.com/
- [4] https://www.noemamag.com/nationhood-revisited/
- [5] https://www.youtube.com/watch?v=si9iqF5uTFk
- [6] https://tinyurl.com/y27atm9a
- [7] https://tinyurl.com/2ys4ul3f
- [8] https://tinyurl.com/24zng3pr
- [9] https://www.youtube.com/watch?v=eUvdPHw4Nd0
- [10] https://locusmag.com/2024/07/cory-doctorow-unpersoned/
Related posts:
- Links September 2020 MD5 cracker, find plain text that matches MD5 hash [1]....
- Links August 2024 Bruce Schneier and Kim Córdova wrote an insightful article about...
- Links March 2024 Bruce Schneier wrote an interesting blog post about his workshop...
CodeLift: From budget-friendly to full redesign: 6 migration paths for Drupal 7 end-of-life
Droptica: Curious about Drupal 7 to 11 migration costs? Collect all the info for estimation in 5 minutes
Migrating from Drupal 7 to the latest version, like Drupal 11, might seem like a big challenge, but it doesn’t have to be. One of the most common obstacles is figuring out how much it will cost. You want to know the price, but you don’t want to give full access to your site just to get an estimate. The good news? You can collect all the necessary information for an accurate project estimate in just 5 minutes.
The Drop Times: Non-Code Contributions Shine at DrupalCon Barcelona 2024
Python Bytes: #403 A machine learning algorithm walks into a bar…
eGenix.com: Python Meeting Düsseldorf - 2024-10-02
The following text is in German, since we're announcing a regional user group meeting in Düsseldorf, Germany.
Das nächste Python Meeting Düsseldorf findet an folgendem Termin statt:
02.10.2024, 18:00 Uhr
Raum 1, 2.OG im Bürgerhaus Stadtteilzentrum Bilk
Düsseldorfer Arcaden, Bachstr. 145, 40217 Düsseldorf
- Detlef Lannert:
pyinfra als Alternative zu Ansible - Marc-André Lemburg:
Rapid web app development with Panel - Detlef Lannert:
Low-cost-Objekte als Alternativen zu Dictionaries? - Charlie Clark:
Editieren von ZIP Dateien mit Python
Wir treffen uns um 18:00 Uhr im Bürgerhaus in den Düsseldorfer Arcaden.
Das Bürgerhaus teilt sich den Eingang mit dem Schwimmbad und befindet
sich an der Seite der Tiefgarageneinfahrt der Düsseldorfer Arcaden.
Über dem Eingang steht ein großes "Schwimm’ in Bilk" Logo. Hinter der Tür
direkt links zu den zwei Aufzügen, dann in den 2. Stock hochfahren. Der
Eingang zum Raum 1 liegt direkt links, wenn man aus dem Aufzug kommt.
>>> Eingang in Google Street View
Das Python Meeting Düsseldorf ist eine regelmäßige Veranstaltung in Düsseldorf, die sich an Python Begeisterte aus der Region wendet.
Einen guten Überblick über die Vorträge bietet unser PyDDF YouTube-Kanal, auf dem wir Videos der Vorträge nach den Meetings veröffentlichen.Veranstaltet wird das Meeting von der eGenix.com GmbH, Langenfeld, in Zusammenarbeit mit Clark Consulting & Research, Düsseldorf:
Das Python Meeting Düsseldorf nutzt eine Mischung aus (Lightning) Talks und offener Diskussion.
Vorträge können vorher angemeldet werden, oder auch spontan während des Treffens eingebracht werden. Ein Beamer mit HDMI und FullHD Auflösung steht zur Verfügung.(Lightning) Talk Anmeldung bitte formlos per EMail an info@pyddf.de
KostenbeteiligungDas Python Meeting Düsseldorf wird von Python Nutzern für Python Nutzer veranstaltet.
Da Tagungsraum, Beamer, Internet und Getränke Kosten produzieren, bitten wir die Teilnehmer um einen Beitrag in Höhe von EUR 10,00 inkl. 19% Mwst. Schüler und Studenten zahlen EUR 5,00 inkl. 19% Mwst.
Wir möchten alle Teilnehmer bitten, den Betrag in bar mitzubringen.
AnmeldungDa wir nur 25 Personen in dem angemieteten Raum empfangen können, möchten wir bitten, sich vorher anzumelden.
Meeting Anmeldung bitte per Meetup
Weitere Informationen finden Sie auf der Webseite des Meetings:
https://pyddf.de/
Viel Spaß !
Marc-Andre Lemburg, eGenix.com
Zato Blog: Enterprise Python: Integrating with Salesforce
Salesforce connections are one of the newest additions to Zato 3.2, allowing you to look up and manage Salesforce records and other business data. To showcase it, the article will create a sample Salesforce marketing campaign in a way that does not require the usage of anything else except for basic REST APIs combined with plain Python objects, such as dicts.
If you have not done it already, you can download Zato here.
Basic workflowThe scope of our works will be:
- Creating Salesforce credentials for our integration project
- Defining a Salesforce connection in Zato
- Authoring a service that will map input data to the format that Salesforce expects
- Creating a Zato REST channel that will be invoked through curl during tests
- Testing the integration
To be able to create as connection to Salesforce in the next step, we need a few credentials. There is a full article about how to prepare them and this section is the gist of it.
In runtime, based on this information, Zato will obtain the necessary authentication and authorization tokens itself, which means that you will only focus on the business side of the integrations, not on the low-level aspects of it.
The process of obtaining the credentials needs to be coordinated with an administrator of your organization. To assist in that, the screenshots below explain where to find them.
The credentials are:
- Username and password
- Consumer key
- Consumer secret
The username and password are simply the same credentials that can be used to log in to Salesforce:
Consumer key and secret are properties of a connected app - this is a term that Salesforce uses for API clients that invoke its services. If you are already an experienced Salesforce REST API user, you may know the key and secret under their aliases of "client_id" and "client_secret" - these are the same objects.
Note that when a connected app already exists and you would like to retrieve the key and secret, they will be available under the "View" menu option for the app, not under "Edit" or "Manage".
Defining a Salesforce connection in ZatoWith all the credentials in place, we can create a new Salesforce connection in Zato Dashboard, as below.
Authoring an integration service in PythonAbove, we created a connection definition that lets Zato obtain session tokens and establish connections to Salesforce. Now, we can create an API service that will make use of such connections.
In the example below, we are using the POST REST method to invoke an endpoint that creates new Salesforce campaigns. In your own integrations, you can invoke any other Salesforce endpoint, using any REST method as needed, by following the same pattern, which is, create a model with input fields, build a Python dict for the request to Salesforce, invoke it and map all the required from the response from Salesforce to that which your own service returns to its own callers.
Note that we use a datamodel-based SimpleIO definition for the service. Among other things, although we are not going to do it here, this would let us offer definitions for this and other services.
# -*- coding: utf-8 -*- # stdlib from dataclasses import dataclass # Zato from zato.server.service import Model, Service # ########################################################################### if 0: from zato.server.connection.salesforce import SalesforceClient # ########################################################################### @dataclass(init=False) class CreateCampaignRequest(Model): name: str segment: str # ########################################################################### @dataclass(init=False) class CreateCampaignResponse(Model): campaign_id: str # ########################################################################### class CreateCampaign(Service): class SimpleIO: input = CreateCampaignRequest output = CreateCampaignResponse def handle(self): # This is our input data input = self.request.input # type: CreateCampaignRequest # Salesforce REST API endpoint to invoke - note that Zato # will add a prefix to it containing the API version. path = '/sobjects/Campaign/' # Build the request to Salesforce based on what we received request = { 'Name': input.name, 'Segment__c': input.segment, } # .. create a reference to our connection definition .. salesforce = self.cloud.salesforce['My Salesforce Connection'] # .. obtain a client to Salesforce .. with salesforce.conn.client() as client: # type: SalesforceClient # .. create the campaign now .. sf_response = client.post(path, request) # .. build our response object .. response = CreateCampaignResponse() response.campaign_id = sf_response['id'] # .. and return its ID to our caller. self.response.payload = response # ########################################################################### Creating a REST channelNote that we assign HTTP Basic Auth credentials to the channel. In this manner, it is possible for clients of this REST channel to authenticate using a method that they are already familiar which simplifies everyone's work - it is Zato that deals with how to authenticate against Salesforce whereas your API clients use the ubiquitous HTTP Basic Auth method.
Testing
The last step is to invoke the newly created channel:
$ curl http://api:password@localhost:17010/api/campaign/create -d '{"name":"Hello", "segment":"123"}' {"campaign_id":"8901Z3VHXDTebEJWs"} $That is everything - you have just integrated with Salesforce and exposed a REST channel for external applications to integrate with!
More resources➤ Python API integration tutorial
➤ What is an integration platform?
➤ Python Integration platform as a Service (iPaaS)
➤ What is an Enterprise Service Bus (ESB)? What is SOA?
Quansight Labs Blog: Numpy QuadDType: Quadruple Precision for Everyone
Quansight Labs Blog: Polars Plugins: let's make them easier to use
Python⇒Speed: Beyond multi-core parallelism: faster Mandelbrot with SIMD
What do you do when computation is too expensive?
Recently I’ve had a brilliant business idea: Mandelbrot-as-a-Service! Instead of companies calculating their own fractals, I will do it for them, freshly calculated in the cloud, with no work on their part. And by using cloud computing, I will be able to scale to the no-doubt vast number of customers who will be paying for my ingenious new service.
I have two goals:
- Speeding up results: The faster I can return fractals, the happier my customers will be.
- Reducing costs: If I can pay my cloud provider less for computing, my profits will go up!
Unfortunately, since I will only be selling freshly calculated and warm-from-the-CPU Mandelbrots, I can’t rely on caching.
What would you do in this situation?
One obvious approach is parallelism: threading or multiprocessing. This will speed up results, so it’s definitely worth doing, but it won’t reduce my costs. If we use 10 cores instead of 1 core, the service will return results ten times faster, but we’ll have to pay approximately 10× as much, since we’ll be using 10× larger instances.
However, if we can figure out how to speed up calculations on a single core, this will contribute to both our goals. We’ll both get faster results, compounded by any multi-core processing, and reduce compute costs.
In this article we will:
- Quickly go over a standard Mandelbrot implementation, written in Rust.
- Discuss why it can be tricky to optimize the Mandelbrot algorithm on a single CPU core.
- Demonstrate how you can in fact do so, by using masked SIMD operations.
- Trivially add on multi-core parallelism, using Rust’s Rayon library.
- PROFIT!
Liip: DrupalCon Barcelona Recap
DrupalCon Barcelona Group picture by Bram Driesen (source)
Hola de nou barcelonaBarcelona for me has a long history of Drupal. For Drupal Dev Days 2012 I organized a mapping sprint, we cycled to DrupalCon Barcelona 2015 as part of the #tourdedrupal report , pictures and it was nice to visit a more local event - Drupal Summer - in 2016 (report, pictures).
Coding beyond functionality. Altering technologies through artistic research by Mónica Rikić Drupal CMS: una nova experiència immediata per a DrupalThis year, the focus was on Drupal CMS (previously known by its internal development name Starshot) which is all about bringing Drupal to the next level by creating an out-of-the-box experience including a new way to create layouts (Experience Builder), integrating AI features and many more features. If you like to dive deeper into Drupal CMS, check out the meta issue listing all work tracks as well as the landing page on Drupal.org.
Driesnote by Dries BuytaertA similar, prepackaged version of Drupal already exists, handcrafted by many individuals and agencies. Recipes have recently been introduced to Drupal core. They allow to package configuration and content to pre-configure Drupal for common use cases like Search, SEO-optimization or an Event calendar feature.
Check out our blökkli starterkit that provides you will a fully-preconfigured setup that we use at Liip.
DrupalCon Crowd Drupal al governWe saw Drupal's wide adoption for Government at DrupalCon Barcelona.
Implementing AI solutions for the French government - in this session it was demonstrated how public services were improved. AI technology would support the public servants by pregenerating responses that would be validated and modified by the public servant. The use of AI technology cut down response times from an average of 19 days to 3 days and a plus of 11% found the received answers helpful.
Running a fleet of web sites with ease via LocalGov Drupal Microsites Platform showed a feature that we are also planning to roll out to one of our customers soon. You can easily manage multiple microsites in Drupal and configure on a per-site-basis the needed styling options in order to customize it to each site needs. By leveraging one CMS basis, the time-to-market and total cost of ownership for each microsite can be heavily reduced.
Jonathan Noack & Thom Nagy presenting about bs.chLarge-scale content creation with Drupal — Delights, Pitfalls and support structures to help editors - in this session our customer Thom Nagy & our product owner Jonathan Noack presented their case study on relaunching bs.ch. I liked to see how a trustful collaboration with strong communication and stakeholder management combined with agile delivery and innovation led to an outcome all participants are proud about.
The website is our flagship showcase for blökkli, the interactive pagebuilder that has delighted many of our customers already and is available for the community under the open-source license.
Even though the canton is embedded in a typically restrictive government environment, they even launched the first AI-based assistant "Alva" that answers any questions the public might have about the canton in their own language using GPT-based technology.
SostenibilitatConferences that bring together folks from all over the world have a hard time being sustainable. I appreciate the efforts to promote sustainable transport for example when amongst the attendees traveling by train, a winner was selected.
The organizing team also worked with the sponsors to make sure they were taking sustainability into account for how they set up their booths and limit the swag they would give out to participants.
DrupalCon Barcelona Mascot watching the crowdThe next DrupalCon Europe has been announced to happen in Vienna October 14-17 2025. I am particularly excited for this location as I grew up in Vienna and have been part of the Drupal Austria community as an organizing member before moving to Switzerland.
As Vienna is at the heart of Europe, I encourage you to think about sustainable ways to get to the conference.
If you travel via Hamburg, Bregenz/Feldkirch, Roma/Blorence/Bologna or Amsterdam, you should even be able to sleep on one of the new generation nightrains that offers better comfort, single-cabins and wheelchair-accessible sleepers. You typically can book your train 6 months ahead. As they introduced dynamic pricing recently, it is recommended to book your tickets early.
The beach alongside DrupalCon BarcelonaI leave you with some pictures from this year in Barcelona.
Would you like to learn more about Drupal? Find an event near you. See you 2025 at one of my favorites Drupal Mountain Camp in Davos or at DrupalCon Vienna.
Web Wash: How to Organize Content Entity Forms in Drupal
Drupal provides a robust framework for creating and managing content. However, managing form fields in complex content entities can be challenging. The Field Group, Inline Entity Form, and Conditional Fields modules offer practical tools for improving the user experience and streamlining the content creation process.
In the above live stream, we’ll use all three modules to organize and clean up fields on an “Event” content type.
Below are the show notes for the live stream.
#! code: Drupal 11: Using The Batch API To Process CSV Files
This is the fourth article in a series of articles about the Batch API in Drupal. The Batch API is a system in Drupal that allows data to be processed in small chunks in order to prevent timeout errors or memory problems.
So far in this series we have looked at creating a batch process using a form, followed by creating a batch class so that batches can be run through Drush and then using the finished state to control batch processing. All of these articles go together to form a basis of batch processing in Drupal.
In this article we will look at bringing these concepts together to perform a task that is quite common on websites, processing Comma Separated Value or CSV files, which we will do using the Drupal Batch API.
Processing CSV data is very common on the web. Whilst it is quite common to integrate with an API it is sometimes simpler to just generate a CSV file of the data you need from one system and upload it into a form on a website. Most systems will allow you to export data as a CSV file of some kind, but it's also very easy to export a CSV from commonly used programs like Excel and Google Sheets.
Processing a CSV file in PHP is quite simple, but once you reach one hundred records you will find that PHP will start to throw errors due to timeouts or memory issues. The solution is to employ the Batch API to spread the load of that processing over a number of different requests.
Open Source Conferences in September
After having participated to both Qt Contributor Summit and Akademy, I ended up going to a few more conferences in September.
Nextcloud ConferenceI went to Nextcloud Conference just after going back from Akademy. Unfortunately I was quite tired from Akademy and Qt Contributor Summit and I only stayed Saturday morning. Still it was great to meet some old colleagues there.
Group photo of the Nextcloud conference
Matrix ConferenceThe Matrix Conference happened the weekend after the Nextcloud conference. This was the first Matrix Conference and a gathering of all types of actors involved in Matrix. From the grassroots community to companies deploying Matrix based solutions to their customers. The NeoChat team was there and we were super productive into bringing back the Android version, thanks to the help of Volker Krause. This resulted in many patches in NeoChat itself but also one patch in Kirigami.
Special mention to the food and coffee offered at the conference, which was always excellent and either vegan or vegetarian. Outside of the venue, food was also execellent with a lot of middle eastern food choice.
Here some photos of the event and the food:
Donuts Hacking at the conference venue Hacking at C-Base Food outside of the venue Linux Days DornbirnIt was my second time going to the Linux Days in Dornbirn and while the weather wasn’t as welcoming as last time, the local Linux community was again super welcoming!
During the event, I did a talk in German about Plasma 6. This was my first time doing a talk in German and I hope I did okay. I also hosted a KDE stand with Simon Österle, who offered his help with the stand. His help has been invaluable to me, so huge thanks to him.
Like last year, after the conference, all helpers, presenters and stand holders went to a local restaurent to enjoy Käsespätzle. It was again delicious.
Here some photos of the event and the food:
Banner at the entrance of the Linux Days Steam Deck and Plasma Mobile The new KDE Banner Linux Days dinner menu Käsespätzle Apfelstrudel Bodensee on the way to Austria Bodensee from the train on the way back A script element has been removed to ensure Planet works properly. Please find it in the original post. A script element has been removed to ensure Planet works properly. Please find it in the original post.Conferences in September
After having participated to both Qt Contributor Summit and Akademy, I ended up going to a few more conferences in September.
Nextcloud ConferenceI went to Nextcloud Conference just after going back from Akademy. Unfortunately I was quite tired from Akademy and Qt Contributor Summit and I only stayed Saturday morning. Still it was great to meet some old colleagues there.
Group photo of the Nextcloud conference
Matrix ConferenceThe Matrix Conference happened the weekend after the Nextcloud conference. This was the first Matrix Conference and a gathering of all types of actors involved in Matrix. From the grassroots community to companies deploying Matrix based solutions to their customers. The NeoChat team was there and we were super productive into bringing back the Android version, thanks to the help of Volker Krause. This resulted in many patches in NeoChat itself but also one patch in Kirigami.
Special mention to the food and coffee offered at the conference, which was always excellent and either vegan or vegetarian. Outside of the venue, food was also execellent with a lot of middle eastern food choice.
Here some photos of the event and the food:
Donuts Hacking at the conference venue Hacking at C-Base Food outside of the venue Linux Days DornbirnIt was my second time going to the Linux Days in Dornbirn and while the weather wasn’t as welcoming as last time, the local Linux community was again super welcoming!
During the event, I did a talk in German about Plasma 6. This was my first time doing a talk in German and I hope I did okay. I also hosted a KDE stand with Simon Österle, who offered his help with the stand. His help has been invaluable to me, so huge thanks to him.
Like last year, after the conference, all helpers, presenters and stand holders went to a local restaurent to enjoy Käsespätzle. It was again delicious.
Here some photos of the event and the food:
Banner at the entrance of the Linux Days Steam Deck and Plasma Mobile The new KDE Banner Linux Days dinner menu Käsespätzle Apfelstrudel Bodensee on the way to Austria Bodensee from the train on the way back A script element has been removed to ensure Planet works properly. Please find it in the original post. A script element has been removed to ensure Planet works properly. Please find it in the original post.This Week in KDE Apps
Welcome to the third post in our “This Week in KDE Apps” series! If you missed it, we just announced this new series two weeks ago, and our goal is to cover as much as possible of what's happening in the KDE world and complete Nate's This Week in Plasma.
This week we had new releases of Amarok and Krita. There is also news regarding KDE Connect, the link between all your devices; Kate, the KDE advanced text editor; Itinerary, the travel assistant that lets you plan all your trips; Marble, KDE's map application; and more.
Let's get started!
AmarokAmarok 3.1.1 was released. 3.1.1 features a number of small improvements and bug fixes, including miscellaneous fixes for toolbars and the return of tag dialog auto-completions — functionality that initially got lost during the Qt5/KF5 port. However, most of the work has again happened under the hood to improve the codebase's Qt6/KF6 compatibility.
See the full announcement for more information
ItineraryItinerary now supports search for places (e.g. street names) in addition to stops. (Code: Jonah Brüchert, Icon: Mathis Brüchert, 24.12.0. Link)
Itinerary now shows the date of the connection when searching for a public transport connection. (Jonah Brüchert, 24.12.0. Link 1, link 2)
DigikamA new face detection algorithm based on YuNet is now available. (Michael Miller, Link)
KateThe debug plugin now works on Windows! (Waqar Ahmed, 24.12.0. Link)
The debug plugin is now much more usable. (Waqar Ahmed, 24.12.0. Link 1, link 2, link 3)
Kate context menu will now show relevant external tools. (Waqar Ahmed, 24.12.0. Link)
KCronThe System Settings page was ported to QML and given a fancy new UI! (Evgeny Chesnokov, 24.12.0. Link)
KDE ConnectFixed the Bluetooth support for KDE Connect. (Rob Emery, 24.12.0. Link 1, link 2)
KeysmithKeysmith now has an "About" page. (Plata Hill, 24.12.0. Link)
KleopatraKleopatra now supports OpenPGP v5 keys. (Ingo Klöcker, 24.12.0. Link 1, link 2)
KritaKrita 5.2.5 was released and is bringing over 50 bugfixes since 5.2.3 (5.2.4 was a Windows-specific hotfix). Major fixes have been done to audio playback, transform mask calculation and more! Read more.
LabPlotLabPlot implements a new type of plot: Process Behavior Chart (X-Chart), (Alexander Semke, Link)
MarbleMarble Maps, the QML version of Marble, has a new icon. (Mathis Brüchert, 24.12.0. Link)
Fixed a major source of visual glitches in the QML version of Marble when looking at the Earth globe. (Carl Schwan, 24.08.2. Link)
Marble Behaim — a special version of Marble to look at the oldest globe representation of the Earth known to exist — now also works on desktop thanks to Kirigami, and all the additional information and credits are now displayed using a standard "About" page. (Carl Schwan, 24.12.0. Link)
Marble's KRunner integration, Plasma Widget and the Wallpaper plugin are now fully ported to Plasma 6. (Carl Schwan, 24.12.0. Link)
NeoChatOn modern versions of Android, NeoChat will now request the correct permission to send system notifications. (James Graham, 24.12.0. Link)
SpectacleSpectacle now respects your custom save file format as expected when using the "Save As" functionality. (Noah Davis, 24.08.2. Link)
OthersValentyn Bondarenko updated several screenshots of KDE apps:
- Partion Manager
- Calligra Plan & Konversation
- Kid3
- KMag
- System Monitor
- KCharSelect & KColorChooser
- Kaffeine, KFind, KMag, KMouseTool, Konqueror, Marble & Yakuake
Eamonn Rea made more Kirigami applications remember their size across launches:
…And Everything ElseThis blog only covers the tip of the iceberg! If you’re hungry for more, check out Nate's blog about Plasma and KDE's Planet, where you can find more news from other KDE contributors.
Get InvolvedThe KDE organization has become important in the world, and your time and contributions have helped achieve that status. As we grow, it’s going to be equally important that your support become sustainable.
We need you for this to happen. You can help KDE by becoming an active community member and getting involved. Each contributor makes a huge difference in KDE; you are not a number or a cog in a machine! You don’t have to be a programmer, either. There are many things you can do: you can help hunt and confirm bugs, even maybe solve them; contribute designs for wallpapers, web pages, icons and app interfaces; translate messages and menu items into your own language; promote KDE in your local community; and a ton more things.
You can also help us by donating. Any monetary contribution, however small, will help us cover operational costs, salaries, travel expenses for contributors and in general help KDE continue bringing Free Software to the world.
Mike C. Fletcher: Interesting Memory Leak with Python 3.12 for PyOpenGL-accelerate
So I'm currently trying to figure out why the PyOpenGL 3.12 test suite is failing. There's a particular test that looks for VBO memory leakage and it looks loosely like this:
for i in range(100):
create_a_vbo_and_delete_it()
calculate_total_process_memory()
assert_no_leak()
which shouldn't ever lose more than a few bytes (limit is set to 200 for this test, but it doesn't lose even one normally). This passes fine on python2.7 through 3.11, but on 3.12 the first 75 iterations leak nothing, then on the 76th iteration (always the 76th) iteration there is a substantial memory leak (100s of KB) and then memory usage goes flat again.
My first guess is that there's something in the 3.12 JIT compiler that looks for e.g. 75 iterations, then does lots of analysis and caching and uses the 100s of KBs of RAM to track the behaviour. I can "fix" the test by reducing the iterations below 75, but that doesn't really address the underlying issue of the test, which is that it's using whole-system memory as a proxy for "did this local function leak RAM". Guess I need to find a better "does some RAM leak" test.
Update: always 75th iteration observation is *only* when run with just the single test. When run in the main test suite, the JIT seems to kick in much earlier (likely because of other tests exercising the same paths). That means it's likely to start failing as more tests are added, which reinforces the need to find a better test method.
Drupal life hack's: Drupal Link Generation: Comparing link_generator, renderer, and Url Methods
Amarok 3.1.1 released
The Amarok Development Squad is happy to announce the immediate availability of Amarok 3.1.1, the first bugfix release for Amarok 3.1 "Tricks of the Light"!
3.1.1 features a number of small improvements and bug fixes, including miscellaneous fixes for toolbars and the return of tag dialog autocompletions, a functionality that initially got lost during the Qt5/KF5 port. However, most of the work has again happened under the hood to improve the codebase's Qt6/KF6 compatibility. For the 3.2 version coming up later this year, the KDE frameworks dependency will be raised to 5.108. This should allow replacing the remaining deprecated KF5 functionalities; one of the final barriers preventing Qt6/KF6 based builds from succeeding.
Changes since 3.1.0 CHANGES:- Most of the context view QML items ported from QtControls 1 to QtControls 2
- Default to no fadeout on pause and stop (BR 491603)
- Actually show the file browser panel toolbar
- Fix track editor autocompletions (BR 491520)
- Ensure home icon is shown in browser breadcrumb widgets (BR 491354)
In addition to source code, Amarok is available for installation from many distributions' package repositories, which are likely to get updated to 3.1.1 soon, as well as the flatpak available on flathub.
Packager sectionYou can find the tarball package on download.kde.org and it has been signed with Tuomas Nurmi's GPG key.
Vasudev Kamath: Signing the systemd-boot on Upgrade Using Dpkg Triggers
In my previous post on enabling SecureBoot, I mentioned that one pending improvement was signing the systemd-boot EFI binary with my keys on every upgrade. In this post, we'll explore the implementation of this process using dpkg triggers.
For an excellent introduction to dpkg triggers, refer to this archived blog post. The source code mentioned in that post can be downloaded from alioth archive.
From /usr/share/doc/dpkg/spec/triggers.txt, triggers are described as follows:
A dpkg trigger is a facility that allows events caused by one package but of interest to another package to be recorded and aggregated, and processed later by the interested package. This feature simplifies various registration and system-update tasks and reduces duplication of processing.To implement this, we create a custom package with a single script that signs the systemd-boot EFI binary using our key. The script is as simple as:
#!/bin/bash set -e echo "Signing the new systemd-bootx64.efi" sbsign --key /etc/secureboot/db.key --cert /etc/secureboot/db.crt \ /usr/lib/systemd/boot/efi/systemd-bootx64.efi echo "Invoking bootctl install to copy stuff" bootctl installInvoking bootctl install is optional if we have enabled systemd-boot-update.service, which will update the signed bootloader on the next boot.
We need to have a triggers file under the debian/ folder of the package, which declares its interest in modifications to the path /usr/lib/systemd/boot/efi/systemd-bootx64.efi. The trigger file looks like this:
# trigger 1 interest on systemd-bootx64.efi interest-noawait /usr/lib/systemd/boot/efi/systemd-bootx64.efiYou can read about various directives and their meanings that can be used in the triggers file in the deb-triggers man page.
Once we build and install the package, this request is added to /var/lib/dpkg/triggers/File. See the screenshot below after installation of our package:
To test the functionality, I performed a re-installation of the systemd-boot-efi package, which provides the EFI binary for systemd-boot, using the following command:
sudo apt install --reinstall systemd-boot-efiDuring installation, you can see the debug message being printed in the screenshot below:
To test the systemd-boot-update.service, I commented out the bootctl install line from the above script, performed a reinstallation, and restarted the systemd-boot-update.service. Checking the log, I saw the following:
Sep 29 13:42:51 chamunda systemd[1]: Stopping systemd-boot-update.service - Automatic Boot Loader Update... Sep 29 13:42:51 chamunda systemd[1]: Starting systemd-boot-update.service - Automatic Boot Loader Update... Sep 29 13:42:51 chamunda bootctl[1801516]: Skipping "/efi/EFI/systemd/systemd-bootx64.efi", same boot loader version in place already. Sep 29 13:42:51 chamunda bootctl[1801516]: Skipping "/efi/EFI/BOOT/BOOTX64.EFI", same boot loader version in place already. Sep 29 13:42:51 chamunda bootctl[1801516]: Skipping "/efi/EFI/BOOT/BOOTX64.EFI", same boot loader version in place already. Sep 29 13:42:51 chamunda systemd[1]: Finished systemd-boot-update.service - Automatic Boot Loader Update. Sep 29 13:43:37 chamunda systemd[1]: systemd-boot-update.service: Deactivated successfully. Sep 29 13:43:37 chamunda systemd[1]: Stopped systemd-boot-update.service - Automatic Boot Loader Update. Sep 29 13:43:37 chamunda systemd[1]: Stopping systemd-boot-update.service - Automatic Boot Loader Update...Indeed, the service attempted to copy the bootloader but did not do so because there was no actual update to the binary; it was just a reinstallation trigger.
The complete code for this package can be found here.
With this post the entire series on using UKI to Secureboot with Debian comes to an end. Happy hacking!.
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