--max_len now accepts integers as expected

[d4straub]

This solves #304

PR checklist

• This comment contains a description of changes (with reason).
• Make sure your code lints (nf-core lint .).
• Ensure the test suite passes (nextflow run . -profile test,docker).
• Usage Documentation in docs/usage.md is updated.
• Output Documentation in docs/output.md is updated.
• CHANGELOG.md is updated.
• README.md is updated (including new tool citations and authors/contributors).

[github-actions]

nf-core lint overall result: Passed ✅ ⚠️

Posted for pipeline commit d7eeb35

+| ✅ 136 tests passed       |+
!| ❗   2 tests had warnings |!

❗ Test warnings:

• files_exist - File not found: conf/igenomes.config
• readme - README did not have a Nextflow minimum version mentioned in Quick Start section.

✅ Tests passed:

• files_exist - File found: .gitattributes
• files_exist - File found: .gitignore
• files_exist - File found: .markdownlint.yml
• files_exist - File found: CHANGELOG.md
• files_exist - File found: CITATIONS.md
• files_exist - File found: CODE_OF_CONDUCT.md
• files_exist - File found: CODE_OF_CONDUCT.md
• files_exist - File found: LICENSE or LICENSE.md or LICENCE or LICENCE.md
• files_exist - File found: nextflow_schema.json
• files_exist - File found: nextflow.config
• files_exist - File found: README.md
• files_exist - File found: .github/.dockstore.yml
• files_exist - File found: .github/CONTRIBUTING.md
• files_exist - File found: .github/ISSUE_TEMPLATE/bug_report.md
• files_exist - File found: .github/ISSUE_TEMPLATE/config.yml
• files_exist - File found: .github/ISSUE_TEMPLATE/feature_request.md
• files_exist - File found: .github/PULL_REQUEST_TEMPLATE.md
• files_exist - File found: .github/workflows/branch.yml
• files_exist - File found: .github/workflows/ci.yml
• files_exist - File found: .github/workflows/linting_comment.yml
• files_exist - File found: .github/workflows/linting.yml
• files_exist - File found: assets/email_template.html
• files_exist - File found: assets/email_template.txt
• files_exist - File found: assets/sendmail_template.txt
• files_exist - File found: assets/nf-core-ampliseq_logo.png
• files_exist - File found: bin/scrape_software_versions.py
• files_exist - File found: conf/modules.config
• files_exist - File found: conf/test.config
• files_exist - File found: conf/test_full.config
• files_exist - File found: docs/images/nf-core-ampliseq_logo.png
• files_exist - File found: docs/output.md
• files_exist - File found: docs/README.md
• files_exist - File found: docs/README.md
• files_exist - File found: docs/usage.md
• files_exist - File found: lib/nfcore_external_java_deps.jar
• files_exist - File found: lib/NfcoreSchema.groovy
• files_exist - File found: lib/NfcoreTemplate.groovy
• files_exist - File found: lib/Utils.groovy
• files_exist - File found: lib/WorkflowMain.groovy
• files_exist - File found: modules/local/get_software_versions.nf
• files_exist - File found: main.nf
• files_exist - File found: assets/multiqc_config.yaml
• files_exist - File found: conf/base.config
• files_exist - File found: .github/workflows/awstest.yml
• files_exist - File found: .github/workflows/awsfulltest.yml
• files_exist - File found: lib/WorkflowAmpliseq.groovy
• files_exist - File found: modules.json
• files_exist - File not found check: Singularity
• files_exist - File not found check: parameters.settings.json
• files_exist - File not found check: bin/markdown_to_html.r
• files_exist - File not found check: conf/aws.config
• files_exist - File not found check: .github/workflows/push_dockerhub.yml
• files_exist - File not found check: .travis.yml
• nextflow_config - Config variable found: manifest.name
• nextflow_config - Config variable found: manifest.nextflowVersion
• nextflow_config - Config variable found: manifest.description
• nextflow_config - Config variable found: manifest.version
• nextflow_config - Config variable found: manifest.homePage
• nextflow_config - Config variable found: timeline.enabled
• nextflow_config - Config variable found: trace.enabled
• nextflow_config - Config variable found: report.enabled
• nextflow_config - Config variable found: dag.enabled
• nextflow_config - Config variable found: process.cpus
• nextflow_config - Config variable found: process.memory
• nextflow_config - Config variable found: process.time
• nextflow_config - Config variable found: params.outdir
• nextflow_config - Config variable found: params.input
• nextflow_config - Config variable found: params.show_hidden_params
• nextflow_config - Config variable found: params.schema_ignore_params
• nextflow_config - Config variable found: manifest.mainScript
• nextflow_config - Config variable found: timeline.file
• nextflow_config - Config variable found: trace.file
• nextflow_config - Config variable found: report.file
• nextflow_config - Config variable found: dag.file
• nextflow_config - Config variable (correctly) not found: params.version
• nextflow_config - Config variable (correctly) not found: params.nf_required_version
• nextflow_config - Config variable (correctly) not found: params.container
• nextflow_config - Config variable (correctly) not found: params.singleEnd
• nextflow_config - Config variable (correctly) not found: params.igenomesIgnore
• nextflow_config - Config variable (correctly) not found: params.name
• nextflow_config - Config timeline.enabled had correct value: true
• nextflow_config - Config report.enabled had correct value: true
• nextflow_config - Config trace.enabled had correct value: true
• nextflow_config - Config dag.enabled had correct value: true
• nextflow_config - Config manifest.name began with nf-core/
• nextflow_config - Config variable manifest.homePage began with https://github.com/nf-core/
• nextflow_config - Config dag.file ended with .svg
• nextflow_config - Config variable manifest.nextflowVersion started with >= or !>=
• nextflow_config - Config manifest.version ends in dev: '2.1.0dev'
• nextflow_config - Config params.custom_config_version is set to master
• nextflow_config - Config params.custom_config_base is set to https://github.com/raw/nf-core/configs/master
• nextflow_config - Lines for loading custom profiles found
• files_unchanged - .gitattributes matches the template
• files_unchanged - .markdownlint.yml matches the template
• files_unchanged - CODE_OF_CONDUCT.md matches the template
• files_unchanged - LICENSE matches the template
• files_unchanged - .github/.dockstore.yml matches the template
• files_unchanged - .github/CONTRIBUTING.md matches the template
• files_unchanged - .github/ISSUE_TEMPLATE/bug_report.md matches the template
• files_unchanged - .github/ISSUE_TEMPLATE/config.yml matches the template
• files_unchanged - .github/ISSUE_TEMPLATE/feature_request.md matches the template
• files_unchanged - .github/PULL_REQUEST_TEMPLATE.md matches the template
• files_unchanged - .github/workflows/branch.yml matches the template
• files_unchanged - .github/workflows/linting_comment.yml matches the template
• files_unchanged - .github/workflows/linting.yml matches the template
• files_unchanged - assets/email_template.html matches the template
• files_unchanged - assets/email_template.txt matches the template
• files_unchanged - assets/sendmail_template.txt matches the template
• files_unchanged - assets/nf-core-ampliseq_logo.png matches the template
• files_unchanged - bin/scrape_software_versions.py matches the template
• files_unchanged - docs/images/nf-core-ampliseq_logo.png matches the template
• files_unchanged - docs/README.md matches the template
• files_unchanged - lib/nfcore_external_java_deps.jar matches the template
• files_unchanged - lib/NfcoreSchema.groovy matches the template
• files_unchanged - lib/NfcoreTemplate.groovy matches the template
• files_unchanged - .gitignore matches the template
• files_unchanged - assets/multiqc_config.yaml matches the template
• actions_ci - '.github/workflows/ci.yml' is triggered on expected events
• actions_ci - '.github/workflows/ci.yml' checks minimum NF version
• actions_awstest - '.github/workflows/awstest.yml' is triggered correctly
• actions_awsfulltest - .github/workflows/awsfulltest.yml is triggered correctly
• actions_awsfulltest - .github/workflows/awsfulltest.yml does not use -profile test
• readme - README Nextflow minimum version badge matched config. Badge: 21.04.0, Config: 21.04.0
• pipeline_name_conventions - Name adheres to nf-core convention
• template_strings - Did not find any Jinja template strings (142 files)
• schema_lint - Schema lint passed
• schema_lint - Schema title + description lint passed
• schema_params - Schema matched params returned from nextflow config
• actions_schema_validation - Workflow validation passed: awsfulltest.yml
• actions_schema_validation - Workflow validation passed: linting.yml
• actions_schema_validation - Workflow validation passed: linting_comment.yml
• actions_schema_validation - Workflow validation passed: awstest.yml
• actions_schema_validation - Workflow validation passed: ci.yml
• actions_schema_validation - Workflow validation passed: branch.yml
• merge_markers - No merge markers found in pipeline files
• modules_json - Only installed modules found in modules.json

Run details

• nf-core/tools version 2.1
• Run at 2021-07-28 11:01:44

[erikrikarddaniel]

Looks fine.

[d4straub]

Thanks!