Session
Schedule FOSDEM 2022
Declarative and Minimalistic Computing

Concise Common Workflow Language

Concision and elegance in a workflow language using lisp
D.minimalistic
Arun Isaac
<p>Scientific workflows are readily and most easily expressed as shell scripts. However, shell scripts are notorious for being "duct tape", and are hard to adapt to different hardware and software environments. Workflow languages such as the Common Workflow Language (CWL) were developed to address this pain point. However, CWL does come at the cost of increased verbosity and reduced readability. Even seasoned scientists shy away from writing CWL, and fall back to the familiarity of shell scripts.</p> <p>This need not be. There is no reason to inflict the behind-the-scenes complexity of workflow languages on the user. It should be possible to automatically translate (in other words, compile) a simple shell-like script into a workflow language specification. In effect, we create a new domain specific language that is almost as easy to write as a shell script, but compiles to CWL. No other language is better suited to this task of creating domain specific languages than lisp. The lisps with their homoiconicity and unique macro system empower the programmer to use ordinary code to hack the compiler itself.</p> <p>In this talk, I will present the Concise Common Workflow Language (ccwl). The Concise Common Workflow Language (ccwl) is a concise syntax to express CWL workflows. It is a compiler that compiles a simple lispy shell-like workflow specification into a CWL workflow. It is implemented in the Scheme programming language, a minimalist dialect of lisp. I will discuss the considerations that went into the design of ccwl, and demonstrate its expressive power with illustrative examples.</p>

Additional information

Type devroom

More sessions

2/6/22
Declarative and Minimalistic Computing
D.minimalistic
<p>Welcome to the Declarative and Minimalistic Computing Devroom.</p> <p>In this year's virtual conference we will honour the late Professor John McCarthy as the founder of AI and the inventor of LISP. McCarthy with his work pioneered artificial intelligence, developed the Lisp programming language family and kickstarted our modern computing world. Lisp is one of the two oldest computer languages in use today.</p>
2/6/22
Declarative and Minimalistic Computing
Juan Julián Merelo
D.minimalistic
<p>Metaprogramming is a technique that allows the creation of data and control structures during runtime. This gives adaptiveness and expressiveness to languages, allowing the creation of data structures with complex behavior, and adapted to the environment or to the data used. In this talk we will talk about general metaprogramming techniques, with examples in Raku and other modern languages.</p>
2/6/22
Declarative and Minimalistic Computing
Ekaitz Zarraga
D.minimalistic
<p>In this presentation I share my 1-year journey with RISC-V and how I started from nearly zero and I ended up porting Guile's JIT library to RISC-V and starting the RISC-V port of Stage0. This journey is full of uncertainties and chaos but that's what finally made this happen. During this talk we'll discuss how embracing chaos can lead to great change and how we can become the source of positive chaos in people around us.</p>
2/6/22
Declarative and Minimalistic Computing
John Mercouris
D.minimalistic
<p>How can we use DSLs in our applications as a replacement for databases? CSVs? configuration files?</p>
2/6/22
Declarative and Minimalistic Computing
Andrew Tropin
D.minimalistic
<p>Functional programming becomes more popular and widespread, it allows to make simplier, and more robust software, which is easier to maintain. Similar patterns and approaches are applicable for deploying or distributing software, managing infrastructures or even personal computers.</p> <p>We will discuss how to treat your computing environment as a simple software project written in functional language and how to manage operating system, services, configurations, user software, dotfiles in a ...
2/6/22
Declarative and Minimalistic Computing
Mathieu Othacehe
D.minimalistic
<p>GNU Guix is a transactional package manager and an advanced distribution based on a minimalistic language: GNU Guile.</p> <p>While users can choose to build everything from sources, the project is providing binary substitutes. Building and distributing those substitutes is a real challenge, involving a 20 GiB database and more than thirty machines.</p> <p>In this talk I will present the architecture of the continuous integration system, how it is maintained, the current limitations as well as ...
2/6/22
Declarative and Minimalistic Computing
Troels Henriksen
D.minimalistic
<p>You need a lot of hubris to design your own programming language. As a result, new languages are often engineered (or "over-engineered") for that glorious future where millions of programmers spend their lives working with the language, and a small army is maintaining the compiler and related tools. But how would you design a language that assumes this bountiful future will never arrive? A language that, even in the best of circumstances, will always be obscure and secondary? Futhark is a ...