About on kinow

Loading JavaScript in Jenkins Active Choices parameters

Sat, 02 Aug 2025 21:59:52 +0300

Be aware that what’s described here may introduce a security risk to your environment, and you must only do it if you really know what you are doing. You will be breaking a few security fixes of Jenkins, such as:

SECURITY-440 https://github.com/jenkinsci/active-choices-plugin/commit/720af532b0a2c69465824af5735be2859d7c3492
Jenkins XSS prevention https://wiki.jenkins-ci.org/JENKINS/Jelly-and-XSS-prevention.html

Some years ago, the Jenkins Active Choices plug-in had a security bug reported as a Groovy script could have malicious code that would trigger an XSS attack in Jenkins (i.e. run some arbitrary JS code in Jenkins). The plug-in got removed from the update site until we fixed it, and the solution was to sanitize the output of the Groovy script used to render the Jenkins parameters.

Migrating the Jena editor from CodeMirror 5 to 6

Wed, 25 Jun 2025 09:38:52 +0300

On October last year, Dependabot’s bot sent Apache Jena a pull request to update CodeMirror (a code editor component for web) to from our current 5.x version to 6.0.1. The build failed, as there were breaking changes in the CodeMirror API going from 5.x to 6.x.

CodeMirror developers wrote a nice documentation for users to migrate and update their code.

After following their documentation, unfortunately there were still build errors. Several months later, I found myself on a Saturday afternoon in a room struggling with the first heat wave in Barcelona this year, and decided to cool down by writing some code under the ceiling fan.

Running Cylc workflows on BSC MareNostrum5

Sun, 25 May 2025 09:38:52 +0300

TL;DR: Using the communication method = poll of Cylc 8 you can easily run Cylc 8 workflows on BSC MareNostrum5 HPC.

A couple of years ago I gave a talk about “HPC workflows for climate models” at an ESiWACE3 event. There, I tried to explain in an unbiased way the differences among the workflow managers commonly used for climate and weather, including Autosubmit, ecFlow, and Cylc. I worked with the three workflow managers, and developed Cylc while at NIWA in New Zealand, and currently I develop Autosubmit at the Barcelona Supercomputing Center, BSC, in Barcelona Spain.

Prado Museum visit: favorite sculptures

Sat, 26 Apr 2025 11:27:52 +0300

I visited the Prado Museum, in Madrid, for the first time a few weeks ago. These were my favorite sculptures.

The first, “Isabel II, veiled” by Camillo Torreggiani, is a marble bust but the realism of the veil over her face is truly impressive. I had seen similar pieces in Louvre, but Torreggiani’s sculpture is truly mesmerizing up close.

Isabel II, veiled, Camillo Torreggiani

“The Painter Mariano Fortuny” is special to me both for being a beautiful bust, and for portraying Marià Fortuny i Marsal, one of my favorite Catalan painters. He has a huge statue in a corner near La Rambla with Carrer Pintor Fortuny, where Casa Pierra art store is located (which I am about to visit today to refill some Cretacolor pastels). Vicenzo Gemito met Fortuny in Italy and made a terracotta bust and then the final bronze sculpture.

Using Docker to run Cypress with Maven

Sun, 11 Aug 2024 00:02:52 +0300

Apache Jena runs Cypress tests from Maven, which makes running everything containerized a bit more difficult. To make it more complicated, we also used wait-on and concurrently to orchestrate how the tests and API test process are launched.

The solution found was to combine the official Maven docker image, with the cypress/included image, in a multi-stage build.

# A multi-stage image with Cypress and Java+Maven for Jena... ALv2...
# To build it:
# `docker build -t jena/build:latest .`
#
# To run it:
# `docker run --entrypoint "" --rm -ti jena/build:latest /bin/bash`

FROM maven:3.9.8-eclipse-temurin-21-jammy AS maven

# The Maven stage. Nothing to see here, we simply copy artefacts
# from this stage onto the next one.
# Docs: https://hub.docker.com/_/maven

FROM cypress/included:13.13.1

# The image with Cypress and everything else included. Compatible
# with temurin jammy, so we can just copy Maven and Java, and set
# the $PATH.
# Docs: https://hub.docker.com/r/cypress/included
#
# NOTE: The Cypress image must match our Cypress version in package.json.
# This is due to how Cypress loads the binary from the cache. It'll
# expect a binary at `/root/.cache/Cypress/$version/Cypress/`. With
# the `$version` coming from the version from the package.json file.

COPY --from=maven /usr/share/maven/ /usr/share/maven/ 
COPY --from=maven /opt/java/ /opt/java

ENV PATH="/usr/share/maven/bin:/opt/java/openjdk/bin:$PATH"

ENTRYPOINT [""]
CMD ["mvn"]

Using the image created with the Dockerfile above, one can test Jena Fuseki UI with containers with:

Logo: Dev Multitask 100 videos

Sat, 11 May 2024 01:33:52 +0300

I modified the DevMultitask channel logo for their 100th video: https://twitter.com/DevMultitask

Dev Multitask 100 videos

The party effects are from another logo I designed for the Apache Software Foundation 20th anniversary.

Logo: Java Ring

Sun, 28 Apr 2024 22:36:52 +0300

I created this logo sometime ago for the Java community of a friend: https://twitter.com/java_ring

Java Ring logo

Acquired a license for the logo, got a copy of Duke in SVG, and some quick Inkscape-ing to slice paths and re-order them.

Coverage report for a GitHub private repository with GitHub Actions

Mon, 29 May 2023 20:36:52 +0300

Normally when you add test coverage to a GitHub repository, the reporting part boils down to a simple call to some API that will post to a third-party external service like Coveralls or Codecov. Many are already on the GitHub Actions Market Place and a few lines of YAML are enough.

A Codecov coverage report

We had to report the test coverage of a private GitHub repository of a project I am working on at the moment, that could not have integration with other services besides GitHub. So no Coveralls and no Codecov.

r/functionalprogramming turned 10

Wed, 26 Oct 2022 19:30:52 +1300

Last week r/functionalprogramming turned 10 years old! Time passed very quickly since I created the subreddit.

I had heard about functional programming before at university and from co-workers, but hadn't much need for it at work. But when I started working on Apache Commons Functor, I realized I needed somewhere to start collecting all the blog posts, papers, and other links I was finding on a part of the Internet I had no idea it existed before.

Cyclic Workflows with Prefect

Mon, 08 Nov 2021 00:00:00 +0000

Last month I wrote about Cyclic Workflows with Cylc and StackStorm and how few workflow managers support cyclic workflows.

I was surprised today while reading Prefect documentation to see this paragraph:

Most workflow frameworks act as if looping is impossible (stressing the Acyclic part of the DAG), but it’s actually trivial to implement. We simply dynamically unroll the loop, similar to how RNN gradients are sometimes computed.

Removing invisible unread GitHub notifications

Fri, 22 Oct 2021 00:00:00 +0000

Some months ago I noticed that even after I marked all my GitHub notifications as read, the unread icon displayed at the right top corner was still showing as if I had unread notifications.

GitHub Notifications icon always-on mode

I tried changing the filters, waiting for a new notification to appear so that I could mark it as read, all hoping that icon would then change. But no matter what I tried in the GitHub UI, the icon was still there.

Blender rendering on NVIDIA Jetson Nano

Sun, 17 Oct 2021 00:00:00 +0000

NVIDIA Jetson Nano computer

I had used Blender during my graduation at the Mackenzie University and started learning Blender 2.8+ again a few weeks ago. Unfortunately rendering the basic tutorials like Andrew Price’s donut takes several minutes on my old (but excellent for programming) Thinkpad T550 i7 16 GB with a simple Samsung SSD. The reason is that my GPU, a NVIDIA NVS 5400M with 2 GB memory and 96 cores cannot be used with Blender as it only supports CUDA 2.1. Blender 2.8+ GPU rendering requires CUDA 3.0 and higher, which means Blender Cycles render is using my CPU, which is slower than using a decent GPU.

Cyclic Workflows with Cylc and StackStorm

Fri, 01 Oct 2021 00:00:00 +0000

I am aware of only two workflow managers that support cyclic workflows. Cylc and StackStorm. I won’t enter into details about these two tools, but I must note that I worked on Cylc during my employment with NIWA, in New Zealand.

In this post I will only show a very simple workflow called five first using Cylc, and then the same workflow with StackStorm.

Cylc

First let’s take a look at the source code of this workflow with Cylc 8 and plot it.

Random traffic light

Tue, 06 Apr 2021 00:00:00 +0000

From a reference photo found on Twitter.

Original photograph from Twitter

Tufted Titmouse

Mon, 05 Apr 2021 00:00:00 +0000

From a reference photo by Ioannis Moutsatsos.

Original photograph of the Tufted Titmouse by Ioannis Moutsatsos

Painted using recently learned techniques after watching a video by Sarah Burns Studio, and also other mixed media technique from a Domestika course by Maru Godas.

Bezerra da Silva

Sat, 27 Mar 2021 00:00:00 +0000

Created with Staedtler colored pencils, then digitalized and post-processed in GIMP. Used a photo for reference.

Drawing of Bezerra da Silva in red colored pencil

Used in Speak Like A Brazilian in this post.

Drawing of Bezerra da Silva in Speak Like A Brazilian screenshot

Figurative drawing line of action 2021-03-11

Thu, 11 Mar 2021 00:00:00 +0000

Low poly in Inkscape

Thu, 11 Mar 2021 00:00:00 +0000

The last Inkscape about screen contest had two entries that called my attention for being created in Inkscape and for how nice they looked. Not having used Inkscape for low poly before, I decided to give it a try.

After reading a handful of tutorials, I realized it is a very interesting and relaxing process. You use a reference photo with low opacity as background, and then create the polygons manually with a vector pen.

Yandê pães logo

Sun, 07 Mar 2021 00:00:00 +0000

Logo created on Inkscape, based on ideas and sketches given by customer.

Used both for the store and for the social media and web sites.

Figurative drawing line of action 2021-02-20

Sat, 20 Feb 2021 00:00:00 +0000