CWL

CWL is an open source programming language created in 2014 by Luka Stojanovic.

Source code:

git clone https://github.com/common-workflow-language/cwltool

#441on PLDB

10Years Old

464Repos

The Common Workflow Language (CWL) is a specification for describing analysis workflows and tools in a way that makes them portable and scalable across a variety of software and hardware environments, from workstations to cluster, cloud, and high performance computing (HPC) environments. CWL is designed to meet the needs of data-intensive science, such as Bioinformatics, Medical Imaging, Astronomy, Physics, and Chemistry.

CWL website
CWL is developed on GitHub and has 284 stars
There are at least 464 CWL repos on GitHub
CWL first developed in https://w3id.org/cwl/meeting_minutes
file extensions for CWL include cwl
CWL on Twitter
The Google BigQuery Public Dataset GitHub snapshot shows 57 users using CWL in 75 repos on GitHub
GitHub supports syntax highlighting for CWL
commonwl.org was registered in 2015
Read more about CWL on the web: 1.

Example from Linguist:

#!/usr/bin/env cwl-runner
# Originally from
# https://github.com/Duke-GCB/GGR-cwl/blob/54e897263a702ff1074c8ac814b4bf7205d140dd/utils/trunk-peak-score.cwl
# Released under the MIT License:
# https://github.com/Duke-GCB/GGR-cwl/blob/54e897263a702ff1074c8ac814b4bf7205d140dd/LICENSE
# Converted to CWL v1.0 syntax using
# https://github.com/common-workflow-language/cwl-upgrader
# and polished by Michael R. Crusoe <mrc@commonwl.org>
# All modifications also released under the MIT License
cwlVersion: v1.0
class: CommandLineTool
doc: Trunk scores in ENCODE bed6+4 files

hints:
  DockerRequirement:
    dockerPull: dukegcb/workflow-utils

inputs:
  peaks:
    type: File
  sep:
    type: string
    default: \t

outputs:
  trunked_scores_peaks:
    type: stdout

baseCommand: awk

arguments:
- -F $(inputs.sep)
- BEGIN{OFS=FS}$5>1000{$5=1000}{print}
- $(inputs.peaks.path)

stdout: $(inputs.peaks.nameroot).trunked_scores$(inputs.peaks.nameext)

Feature	Supported	Token	Example
Comments	✓		# A comment
Line Comments	✓	#	# A comment
Semantic Indentation	X

CWL - Programming language

Language features