nextflow | A DSL for data-driven computational pipelines | BPM library

 by   nextflow-io Groovy Version: 24.02.0-edge License: Apache-2.0

kandi X-RAY | nextflow Summary

kandi X-RAY | nextflow Summary

nextflow is a Groovy library typically used in Automation, BPM, Docker applications. nextflow has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Nextflow is a bioinformatics workflow manager that enables the development of portable and reproducible workflows. It supports deploying workflows on a variety of execution platforms including local, HPC schedulers, AWS Batch, Google Cloud Life Sciences, and Kubernetes. Additionally, it provides support for manage your workflow dependencies through built-in support for Conda, Docker, Singularity, and Modules.
Support
    Quality
      Security
        License
          Reuse

            kandi-support Support

              nextflow has a medium active ecosystem.
              It has 2061 star(s) with 535 fork(s). There are 86 watchers for this library.
              There were 7 major release(s) in the last 12 months.
              There are 228 open issues and 2389 have been closed. On average issues are closed in 308 days. There are 56 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of nextflow is 24.02.0-edge

            kandi-Quality Quality

              nextflow has no bugs reported.

            kandi-Security Security

              nextflow has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              nextflow is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              nextflow releases are available to install and integrate.
              Installation instructions, examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of nextflow
            Get all kandi verified functions for this library.

            nextflow Key Features

            No Key Features are available at this moment for nextflow.

            nextflow Examples and Code Snippets

            Errors Installing singularity inside dockerfile
            Lines of Code : 82dot img1License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            FROM python:3.8.9-slim 
            LABEL 
            authors="phil.ewels@scilifelab.se,erik.danielsson@scilifelab.se" \
              description="Docker image containing requirements for the nfcore tools"
            
            # Do not pick up python packages from $HOME
            ENV PYTHONNUSERSITE=1
            
            How do I print nextflow script parameters in arparse style?
            Lines of Code : 30dot img2License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            nextflow.enable.dsl=2
            
            
            params.publish_dir = System.getenv('TMPDIR') ?: './results'
            params.publish_mode = 'copy'
            
            check_params()
            
            
            workflow {
                
                // your awesome workflow here
            }
            
            def check_params() {
            
                if( params.remove('help') ) {
            if statement to select a channel in input block with nextflow
            Lines of Code : 94dot img3License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            input:
                [from ] [attributes]
            
            ch1 = Channel.of( 'hello', 'world' )
            ch2 = Channel.of( 1, 3, 5, 7, 9 )
            
            params.foo = false
            params.bar = false
            
            
            process test {
            
                echo true
            
                input:
                val myval from ( params.
            Input param not working as conditional switch in Nextflow processes
            Lines of Code : 58dot img4License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            params.force = false
            
            println("Force: ${params.force}")
            
            
            process test {
            
                echo true
            
                when:
                params.force
            
                """
                echo "foo"
                """
            }
            
            nextflow run test.nf 
            N E X T F L O W  ~  version 21.04.3
            Launch
            Pass path for `publishDir` to NextFlow Processes
            Lines of Code : 43dot img5License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            publishDir("${results_dir}/MY_PROC_RESULTS/", mode: "copy")
            
            nextflow.enable.dsl=2
            
            params.publish_dir = './results'
            
            include { SUB_WORKFLOW_WF } from './SUB_WORKFLOW_WF_PROCS.nf'
            
            
            workflow{
                
                SUB_WORKFLOW_W
            Why can't Nextflow handle this awk phrase?
            Javadot img6Lines of Code : 31dot img6License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            params.input_csv = '/file/location/here/file.csv'
            
            input_csv = file( params.input_csv)
            
            
            process unique {
            
                input:
                path input_csv
            
                output:
                path 'full_template.csv' into template
            
                shell:
                '''
                awk 'BEGIN { FS=OFS=",
            change the location of the .nextflow folder?
            Lines of Code : 3dot img7License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            cd A
            nextflow run -w B
            
            Nextflow, Limit the number of concurrent workers in Google
            Lines of Code : 56dot img8License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            executor {
                queueSize = 1
            }
            
            nextflow.enable.dsl=2
            
            process test {
            
                tag { "myval: ${myval}" }
            
                input:
                val myval
            
                """
                sleep 1
                """
            }
            
            workflow {
            
                myvals = Channel.of( 'A'..'Z' )
            
                tes
            `errorStrategy` setting to stop current process but continue pipeline
            Lines of Code : 61dot img9License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            nextflow.enable.dsl=2
            
            process foo {
            
                tag { sample }
            
                input:
                val sample
            
                output:
                path "${sample}.txt"
            
                """
                if [ "${sample}" == "s1" ] ; then
                    (exit 1)
                fi
                if [ "${sample}" == "s2" ] ; then
                    
            How to create a value channel of files?
            Lines of Code : 25dot img10License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            proteins = Channel.fromPath( '/some/path/*.fa' ).collect()
            executions = Channel.from(1, 2, 3, 4)
            
            process blastThemAll {
            
              tag { "job ${num}" }
            
              input:
              val num from executions
              path query_file from proteins
            
              """
              find . -name '*.f

            Community Discussions

            QUESTION

            How to collect channels hierarchically?
            Asked 2021-Jun-11 at 14:25

            How can I run a process with one instance for each pair of values in two lists, then collect the output of those instances along only one of the lists at a time?

            For example, if you run this Nextflow script:

            ...

            ANSWER

            Answered 2021-Jun-11 at 14:25

            One solution is to have your first process output a tuple which includes the 'number' as the first element, and then call groupTuple() to group together the files that share the same key:

            Source https://stackoverflow.com/questions/67933725

            QUESTION

            Provide NextFlow workflow inputs (not parameters) via the CLI
            Asked 2021-Apr-14 at 02:48

            I have the following (simplified) nextflow module. It has one process, which runs a multiple sequence alignment on a fasta file, and a workflow that runs this process (eventually it will run other processes too):

            ...

            ANSWER

            Answered 2021-Apr-14 at 02:48

            Implicit workflow definitions are ignored when a script is imported as module. This means that your workflow script that can be used either as a library module or as an application script:

            Source https://stackoverflow.com/questions/67069392

            QUESTION

            How to enumerate files in channel to use `collectFile`
            Asked 2021-Apr-14 at 01:50

            I am trying to enumerate files in a Channel to rename them before using collectFile:

            ...

            ANSWER

            Answered 2021-Apr-14 at 01:50

            The migration notes say to use the join operator instead. If your inputs were lists, you could do something like:

            Source https://stackoverflow.com/questions/67056811

            QUESTION

            Missing 'stdout' file when using Slurm and Singularity
            Asked 2021-Apr-01 at 01:05

            I want to use Nextflow for creating pipelines of singularity components which will be executed by Slurm job scheduler. I created a simple job to run just a single task:

            ...

            ANSWER

            Answered 2021-Mar-30 at 04:24

            Best to avoid calling Singularity manually, like in your script block. Assuming Singularity will be in your $PATH on every execution/compute node in your queue, then, all you'd need, for example, is:

            In your nextflow.config:

            Source https://stackoverflow.com/questions/66858401

            QUESTION

            How to call a variable created in the script in Nextflow?
            Asked 2021-Mar-11 at 03:17

            I have a nextflow script that creates a variable from a text file, and I need to pass the value of that variable to a command line order (which is a bioconda package). Those two processes happen inside the "script" part. I have tried to call the variable using the '$' symbol without any results, I think because using that symbol in the script part of a nextflow script is for calling variables defined in the input part.

            To make myself clearer, here is a code sample of what I'm trying to achieve:

            ...

            ANSWER

            Answered 2021-Mar-10 at 21:47

            declare "parameter" in the top 'params' section.

            Source https://stackoverflow.com/questions/66568781

            QUESTION

            renameing .fromFilePairs with regex capture group in closure
            Asked 2021-Mar-08 at 14:49

            I'm new to nextflow/groovy/java and i'm running into some difficulty with a simple regular expression task.

            I'm trying to alter the labels of some file pairs. It is my understanding that fromFilePairs returns a data structure of the form:

            ...

            ANSWER

            Answered 2021-Mar-08 at 14:49

            A closure can be provided to the fromfilepairs operator to implement a custom file pair grouping strategy. It takes a file and should return the grouping key. The example in the docs just groups the files by their file extensions:

            Source https://stackoverflow.com/questions/66531332

            QUESTION

            Multiple outputs to single list input - merging BAM files in Nextflow
            Asked 2021-Mar-04 at 15:53

            I am attempting to merge x number of bam files produced via performing multiple alignments at once (on batches of y number of fastq files) into one single bam file in Nextflow.

            So far I have the following when performing the alignment and sorting/indexing the resulting bam file:

            ...

            ANSWER

            Answered 2021-Mar-04 at 15:53

            The simplest fix would probably to stop passing the static dirstring and runstring around via channels:

            Source https://stackoverflow.com/questions/66475893

            QUESTION

            NextFlow: how to use inputStream with DSL2
            Asked 2021-Mar-03 at 02:38

            Using NextFlow (DSL=2), I would like to use each line of a file as a streaming input of my workflow.

            ...

            ANSWER

            Answered 2021-Mar-03 at 02:38

            Your example code looks like an anti-pattern - it will try to create a new channel for each line in your input file. Instead, have a look at the splitting operators, especially the splitText operator:

            Source https://stackoverflow.com/questions/66424655

            QUESTION

            Overriding Nextflow Parameters with Commandline Arguments
            Asked 2021-Feb-25 at 02:00

            Given the following nextflow.config:

            ...

            ANSWER

            Answered 2021-Feb-25 at 01:59

            Overriding pipeline parameters can be done using Nextflow's command line interface by prefixing the parameter name with a double dash. For example, put the following in a file called 'test.nf':

            Source https://stackoverflow.com/questions/66356045

            QUESTION

            Try catch in Nextflow processes
            Asked 2021-Feb-11 at 23:29

            How can I perform a try catch in nextflow?

            I am currently writing a pipeline where it is possible that the bash command I am executing exits with an exitcode 1 under certain conditions. This brings my pipeline to a grinding halt. I would now like to use a try catch clause to define some alternative behavior in case this happens.

            I have tried doing this in groovy fashion which does not seem to work:

            ...

            ANSWER

            Answered 2021-Feb-11 at 23:29

            AFAIK there's no way to handle errors in your process definition using a try/catch block. Rather than trying to catch all of the scenarios that result in an exit status 1, could you better define those conditions and handle them before trying to execute your process? For example, if an empty FASTQ file (or a FASTQ file with an insufficient number of reads as required by your process) was supplied as input and this resulted in an exit status 1, a pre-processing command that filtered out those files could be useful here.

            But if it's not possible to better define the condition(s) that your command produces exit status 1 or any non-zero exit status, you can ignore them like you have suggested by appending errorStrategy 'ignore' to your process definition. Below is an example of how you could get the 'success' and 'failed' outputs, so they can be handled appropriately:

            Source https://stackoverflow.com/questions/66119818

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install nextflow

            Nextflow does not require any installation procedure, just download the distribution package by copying and pasting this command in your terminal:. It creates the nextflow executable file in the current directory. You may want to move it to a folder accessible from your $PATH.
            Nextflow can also be installed from Bioconda.

            Support

            Nextflow documentation is available at this link http://docs.nextflow.io.
            Find more information at:

            Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items

            Find more libraries
            Install
            Maven
            Gradle
            CLONE
          • HTTPS

            https://github.com/nextflow-io/nextflow.git

          • CLI

            gh repo clone nextflow-io/nextflow

          • sshUrl

            git@github.com:nextflow-io/nextflow.git

          • Stay Updated

            Subscribe to our newsletter for trending solutions and developer bootcamps

            Agree to Sign up and Terms & Conditions

            Share this Page

            share link

            Explore Related Topics

            Consider Popular BPM Libraries

            Try Top Libraries by nextflow-io

            cwl2nxf

            by nextflow-ioGroovy

            nf-sqldb

            by nextflow-ioGroovy

            nf-validation

            by nextflow-ioGroovy

            rmghc-2018

            by nextflow-ioHTML

            nf-hack17

            by nextflow-ioShell