Replace check_max function with resourceLimits directive

.github/workflows/create-lint-wf.yml

@@ -38,7 +38,7 @@ jobs:
     strategy:
       matrix:
         NXF_VER:
-          - "23.10.0"
+          - "24.04.2"
           - "latest-everything"
     steps:
       - name: go to subdirectory and change nextflow workdir

.github/workflows/create-test-wf.yml

@@ -39,7 +39,7 @@ jobs:
     strategy:
       matrix:
         NXF_VER:
-          - "23.10.0"
+          - "24.04.2"
           - "latest-everything"
     steps:
       - name: go to working directory
@@ -75,7 +75,7 @@ jobs:
           pwd
           # echo content of current directory
           ls -la
-          nextflow run nf-core-testpipeline -profile test,self_hosted_runner --outdir ./results
+          nextflow run nf-core-testpipeline -profile self_hosted_runner,test --outdir ./results
 
       - name: Upload log file artifact
         if: ${{ always() }}

CHANGELOG.md

@@ -38,6 +38,7 @@
 - add option to exclude tower.yml from pipeline template ([#3134](https://github.com/nf-core/tools/pull/3134))
 - run nf-core lint `--release` on PRs to master ([#3148](https://github.com/nf-core/tools/pull/3148))
 - Add tests to ensure all files are part of a template customisation group and all groups are tested ([#3099](https://github.com/nf-core/tools/pull/3099))
+- Replaces the old custom `check_max()` function with the Nextflow native `resourceLimits` directive ([#3037](https://github.com/nf-core/tools/pull/3037))
 - Fixed release announcement hashtags for Mastodon ([#3099](https://github.com/nf-core/tools/pull/3176))
 
 ### Linting

nf_core/pipeline-template/.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
     strategy:
       matrix:
         NXF_VER:
-          - "23.10.0"
+          - "24.04.2"
           - "latest-everything"
     steps:
       - name: Check out pipeline code

nf_core/pipeline-template/README.md

@@ -20,7 +20,7 @@
 [![Cite with Zenodo](http://img.shields.io/badge/DOI-10.5281/zenodo.XXXXXXX-1073c8?labelColor=000000)](https://doi.org/10.5281/zenodo.XXXXXXX)
 [![nf-test](https://img.shields.io/badge/unit_tests-nf--test-337ab7.svg)](https://www.nf-test.com)
 
-[![Nextflow](https://img.shields.io/badge/nextflow%20DSL2-%E2%89%A523.10.0-23aa62.svg)](https://www.nextflow.io/)
+[![Nextflow](https://img.shields.io/badge/nextflow%20DSL2-%E2%89%A524.04.2-23aa62.svg)](https://www.nextflow.io/)
 [![run with conda](http://img.shields.io/badge/run%20with-conda-3EB049?labelColor=000000&logo=anaconda)](https://docs.conda.io/en/latest/)
 [![run with docker](https://img.shields.io/badge/run%20with-docker-0db7ed?labelColor=000000&logo=docker)](https://www.docker.com/)
 [![run with singularity](https://img.shields.io/badge/run%20with-singularity-1d355c.svg?labelColor=000000)](https://sylabs.io/docs/)

nf_core/pipeline-template/conf/base.config

@@ -11,9 +11,9 @@
 process {
 
     // TODO nf-core: Check the defaults for all processes
-    cpus   = { check_max( 1    * task.attempt, 'cpus'   ) }
-    memory = { check_max( 6.GB * task.attempt, 'memory' ) }
-    time   = { check_max( 4.h  * task.attempt, 'time'   ) }
+    cpus   = { 1      * task.attempt }
+    memory = { 6.GB   * task.attempt }
+    time   = { 4.h    * task.attempt }
 
     errorStrategy = { task.exitStatus in ((130..145) + 104) ? 'retry' : 'finish' }
     maxRetries    = 1
@@ -27,30 +27,30 @@ process {
     // TODO nf-core: Customise requirements for specific processes.
     // See https://www.nextflow.io/docs/latest/config.html#config-process-selectors
     withLabel:process_single {
-        cpus   = { check_max( 1                  , 'cpus'    ) }
-        memory = { check_max( 6.GB * task.attempt, 'memory'  ) }
-        time   = { check_max( 4.h  * task.attempt, 'time'    ) }
+        cpus   = { 1                   }
+        memory = { 6.GB * task.attempt }
+        time   = { 4.h  * task.attempt }
     }
     withLabel:process_low {
-        cpus   = { check_max( 2     * task.attempt, 'cpus'    ) }
-        memory = { check_max( 12.GB * task.attempt, 'memory'  ) }
-        time   = { check_max( 4.h   * task.attempt, 'time'    ) }
+        cpus   = { 2     * task.attempt }
+        memory = { 12.GB * task.attempt }
+        time   = { 4.h   * task.attempt }
     }
     withLabel:process_medium {
-        cpus   = { check_max( 6     * task.attempt, 'cpus'    ) }
-        memory = { check_max( 36.GB * task.attempt, 'memory'  ) }
-        time   = { check_max( 8.h   * task.attempt, 'time'    ) }
+        cpus   = { 6     * task.attempt }
+        memory = { 36.GB * task.attempt }
+        time   = { 8.h   * task.attempt }
     }
     withLabel:process_high {
-        cpus   = { check_max( 12    * task.attempt, 'cpus'    ) }
-        memory = { check_max( 72.GB * task.attempt, 'memory'  ) }
-        time   = { check_max( 16.h  * task.attempt, 'time'    ) }
+        cpus   = { 12    * task.attempt }
+        memory = { 72.GB * task.attempt }
+        time   = { 16.h  * task.attempt }
     }
     withLabel:process_long {
-        time   = { check_max( 20.h  * task.attempt, 'time'    ) }
+        time   = { 20.h  * task.attempt }
     }
     withLabel:process_high_memory {
-        memory = { check_max( 200.GB * task.attempt, 'memory' ) }
+        memory = { 200.GB * task.attempt }
     }
     withLabel:error_ignore {
         errorStrategy = 'ignore'

nf_core/pipeline-template/conf/test.config

@@ -10,15 +10,18 @@
 ----------------------------------------------------------------------------------------
 */
 
+process {
+    resourceLimits = [
+        cpus: 4,
+        memory: '15.GB',
+        time: '1.h'
+    ]
+}
+
 params {
     config_profile_name        = 'Test profile'
     config_profile_description = 'Minimal test dataset to check pipeline function'
 
-    // Limit resources so that this can run on GitHub Actions
-    max_cpus   = 2
-    max_memory = '6.GB'
-    max_time   = '6.h'
-
     // Input data
     // TODO nf-core: Specify the paths to your test data on nf-core/test-datasets
     // TODO nf-core: Give any required params for the test so that command line flags are not needed

nf_core/pipeline-template/nextflow.config

@@ -56,12 +56,6 @@ params {
     config_profile_url         = null
     {%- endif %}
 
-    // Max resource options
-    // Defaults only, expecting to be overwritten
-    max_memory                 = '128.GB'
-    max_cpus                   = 16
-    max_time                   = '240.h'
-
     {%- if nf_schema %}
     // Schema validation default options
     validate_params            = true
@@ -82,21 +76,6 @@ process {
     maxErrors     = '-1'
 }
 {% endif %}
-{% if nf_core_configs -%}
-// Load nf-core custom profiles from different Institutions
-try {
-    includeConfig "${params.custom_config_base}/nfcore_custom.config"
-} catch (Exception e) {
-    System.err.println("WARNING: Could not load nf-core/config profiles: ${params.custom_config_base}/nfcore_custom.config")
-}
-
-// Load {{ name }} custom profiles from different institutions.
-try {
-    includeConfig "${params.custom_config_base}/pipeline/{{ short_name }}.config"
-} catch (Exception e) {
-    System.err.println("WARNING: Could not load nf-core/config/{{ short_name }} profiles: ${params.custom_config_base}/pipeline/{{ short_name }}.config")
-}
-{% endif -%}
 
 profiles {
     debug {
@@ -205,6 +184,22 @@ profiles {
     {%- endif %}
 }
 
+{% if nf_core_configs -%}
+// Load nf-core custom profiles from different Institutions
+try {
+    includeConfig "${params.custom_config_base}/nfcore_custom.config"
+} catch (Exception e) {
+    System.err.println("WARNING: Could not load nf-core/config profiles: ${params.custom_config_base}/nfcore_custom.config")
+}
+
+// Load {{ name }} custom profiles from different institutions.
+try {
+    includeConfig "${params.custom_config_base}/pipeline/{{ short_name }}.config"
+} catch (Exception e) {
+    System.err.println("WARNING: Could not load nf-core/config/{{ short_name }} profiles: ${params.custom_config_base}/pipeline/{{ short_name }}.config")
+}
+{% endif -%}
+
 // Set default registry for Apptainer, Docker, Podman, Charliecloud and Singularity independent of -profile
 // Will not be used unless Apptainer / Docker / Podman / Charliecloud / Singularity are enabled
 // Set to your registry if you have a mirror of containers
@@ -271,7 +266,7 @@ manifest {
     homePage        = 'https://github.com/{{ name }}'
     description     = """{{ description }}"""
     mainScript      = 'main.nf'
-    nextflowVersion = '!>=23.10.0'
+    nextflowVersion = '!>=24.04.2'
     version         = '{{ version }}'
     doi             = ''
 }
@@ -318,35 +313,3 @@ validation {
 // Load modules.config for DSL2 module specific options
 includeConfig 'conf/modules.config'
 {% endif %}
-// Function to ensure that resource requirements don't go beyond
-// a maximum limit
-def check_max(obj, type) {
-    if (type == 'memory') {
-        try {
-            if (obj.compareTo(params.max_memory as nextflow.util.MemoryUnit) == 1)
-                return params.max_memory as nextflow.util.MemoryUnit
-            else
-                return obj
-        } catch (all) {
-            println "   ### ERROR ###   Max memory '${params.max_memory}' is not valid! Using default value: $obj"
-            return obj
-        }
-    } else if (type == 'time') {
-        try {
-            if (obj.compareTo(params.max_time as nextflow.util.Duration) == 1)
-                return params.max_time as nextflow.util.Duration
-            else
-                return obj
-        } catch (all) {
-            println "   ### ERROR ###   Max time '${params.max_time}' is not valid! Using default value: $obj"
-            return obj
-        }
-    } else if (type == 'cpus') {
-        try {
-            return Math.min( obj, params.max_cpus as int )
-        } catch (all) {
-            println "   ### ERROR ###   Max cpus '${params.max_cpus}' is not valid! Using default value: $obj"
-            return obj
-        }
-    }
-}

nf_core/pipeline-template/nextflow_schema.json

@@ -136,41 +136,6 @@
             }
         },
         {%- endif %}
-        "max_job_request_options": {
-            "title": "Max job request options",
-            "type": "object",
-            "fa_icon": "fab fa-acquisitions-incorporated",
-            "description": "Set the top limit for requested resources for any single job.",
-            "help_text": "If you are running on a smaller system, a pipeline step requesting more resources than are available may cause the Nextflow to stop the run with an error. These options allow you to cap the maximum resources requested by any single job so that the pipeline will run on your system.\n\nNote that you can not _increase_ the resources requested by any job using these options. For that you will need your own configuration file. See [the nf-core website](https://nf-co.re/usage/configuration) for details.",
-            "properties": {
-                "max_cpus": {
-                    "type": "integer",
-                    "description": "Maximum number of CPUs that can be requested for any single job.",
-                    "default": 16,
-                    "fa_icon": "fas fa-microchip",
-                    "hidden": true,
-                    "help_text": "Use to set an upper-limit for the CPU requirement for each process. Should be an integer e.g. `--max_cpus 1`"
-                },
-                "max_memory": {
-                    "type": "string",
-                    "description": "Maximum amount of memory that can be requested for any single job.",
-                    "default": "128.GB",
-                    "fa_icon": "fas fa-memory",
-                    "pattern": "^\\d+(\\.\\d+)?\\.?\\s*(K|M|G|T)?B$",
-                    "hidden": true,
-                    "help_text": "Use to set an upper-limit for the memory requirement for each process. Should be a string in the format integer-unit e.g. `--max_memory '8.GB'`"
-                },
-                "max_time": {
-                    "type": "string",
-                    "description": "Maximum amount of time that can be requested for any single job.",
-                    "default": "240.h",
-                    "fa_icon": "far fa-clock",
-                    "pattern": "^(\\d+\\.?\\s*(s|m|h|d|day)\\s*)+$",
-                    "hidden": true,
-                    "help_text": "Use to set an upper-limit for the time requirement for each process. Should be a string in the format integer-unit e.g. `--max_time '2.h'`"
-                }
-            }
-        },
         "generic_options": {
             "title": "Generic options",
             "type": "object",
@@ -278,9 +243,6 @@
         {% if nf_core_configs %}{
             "$ref": "#/$defs/institutional_config_options"
         },{% endif %}
-        {
-            "$ref": "#/$defs/max_job_request_options"
-        },
         {
             "$ref": "#/$defs/generic_options"
         }

nf_core/pipelines/lint/nextflow_config.py

@@ -80,6 +80,9 @@ def nextflow_config(self) -> Dict[str, List[str]]:
     * ``params.nf_required_version``: The old method for specifying the minimum Nextflow version. Replaced by ``manifest.nextflowVersion``
     * ``params.container``: The old method for specifying the dockerhub container address. Replaced by ``process.container``
     * ``igenomesIgnore``: Changed to ``igenomes_ignore``
+    * ``params.max_cpus``: Old method of specifying the maximum number of CPUs a process can request. Replaced by native Nextflow `resourceLimits`directive in config files.
+    * ``params.max_memory``: Old method of specifying the maximum number of memory can request. Replaced by native Nextflow `resourceLimits`directive.
+    * ``params.max_time``: Old method of specifying the maximum number of CPUs can request. Replaced by native Nextflow `resourceLimits`directive.
 
         .. tip:: The ``snake_case`` convention should now be used when defining pipeline parameters
 
@@ -146,7 +149,13 @@ def nextflow_config(self) -> Dict[str, List[str]]:
         ["params.input"],
     ]
     # Throw a warning if these are missing
-    config_warn = [["manifest.mainScript"], ["timeline.file"], ["trace.file"], ["report.file"], ["dag.file"]]
+    config_warn = [
+        ["manifest.mainScript"],
+        ["timeline.file"],
+        ["trace.file"],
+        ["report.file"],
+        ["dag.file"],
+    ]
     # Old depreciated vars - fail if present
     config_fail_ifdefined = [
         "params.nf_required_version",
@@ -155,6 +164,9 @@ def nextflow_config(self) -> Dict[str, List[str]]:
         "params.igenomesIgnore",
         "params.name",
         "params.enable_conda",
+        "params.max_cpus",
+        "params.max_memory",
+        "params.max_time",
     ]
 
     # Lint for plugins

nf_core/pipelines/lint/readme.py

@@ -36,7 +36,7 @@ def readme(self):
 
     if "nextflow_badge" not in ignore_configs:
         # Check that there is a readme badge showing the minimum required version of Nextflow
-        # [![Nextflow](https://img.shields.io/badge/nextflow%20DSL2-%E2%89%A523.10.0-23aa62.svg)](https://www.nextflow.io/)
+        # [![Nextflow](https://img.shields.io/badge/nextflow%20DSL2-%E2%89%A524.04.2-23aa62.svg)](https://www.nextflow.io/)
         # and that it has the correct version
         nf_badge_re = r"\[!\[Nextflow\]\(https://img\.shields\.io/badge/nextflow%20DSL2-!?(?:%E2%89%A5|%3E%3D)([\d\.]+)-23aa62\.svg\)\]\(https://www\.nextflow\.io/\)"
         match = re.search(nf_badge_re, content)