Bug(s) in hello-nf-core tutorial

[sunilnahata]

I'm running the hello-nf-core tutorial on github codespaces and ran into this error where the nf-core/demo pipeline isn't taking the input from the test.config file:

training/hello-nf-core -> nextflow run nf-core/demo -r 1.2.0  -profile docker,test --outdir demo-results
Nextflow 26.04.6 is available - Please consider updating your version to it

 N E X T F L O W   ~  version 25.10.4

Launching `https://github.com/nf-core/demo` [boring_neumann] DSL2 - revision: 32893afef8 [1.2.0]


------------------------------------------------------
                                        ,--./,-.
        ___     __   __   __   ___     /,-._.--~'
  |\ | |__  __ /  ` /  \ |__) |__         }  {
  | \| |       \__, \__/ |  \ |___     \`-._,-`-,
                                        `._,._,'
  nf-core/demo 1.2.0
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Input/output options
  outdir             : demo-results

Generic options
  trace_report_suffix: 2026-07-23_15-59-50

Core Nextflow options
  revision           : 1.2.0
  runName            : boring_neumann
  containerEngine    : docker
  launchDir          : /workspaces/training/hello-nf-core
  workDir            : /workspaces/training/hello-nf-core/work
  projectDir         : /workspaces/.nextflow/assets/nf-core/demo
  userName           : root
  profile            : docker,test
  configFiles        : /workspaces/.nextflow/assets/nf-core/demo/nextflow.config

!! Only displaying parameters that differ from the pipeline defaults !!
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* The pipeline
    https://doi.org/10.5281/zenodo.12192442

* The nf-core framework
    https://doi.org/10.1038/s41587-020-0439-x

* Software dependencies
    https://github.com/nf-core/demo/blob/master/CITATIONS.md

ERROR ~ Validation of pipeline parameters failed!

 -- Check '.nextflow.log' file for details
The following invalid input values have been detected:

* Missing required parameter(s): input

Additionally, the following command also throws an error:
ln -s "$(echo $NXF_HOME/assets/.repos/nf-core/demo/clones/*/)" pipelines/nf-core/demo
because there's no .repos director in assets
ls $NXF_HOME/assets/.repos/ ls: cannot access '/workspaces/.nextflow/assets/.repos/': No such file or directory

[mribeirodantas]

Hi @sunilnahata

I just ran the first command on a GitHub Codespace instance, and it is running past the output you shared.

The commands

mkdir -p pipelines/nf-core
ln -s "$(echo $NXF_HOME/assets/.repos/nf-core/demo/clones/*/)" pipelines/nf-core/demo

also worked. Do you mind trying again?

[sunilnahata]

Hi @mribeirodantas
Thanks for reverting back on this. I was apparently running an older version of nextflow which wasn't compatible with the strict syntax parser implemented in Nextflow 26, and hence the errors.
Everything went fine after the update.

Thanks.