remove topics from multiqc

modules/nf-core/multiqc/main.nf

@@ -18,7 +18,8 @@ process MULTIQC {
     path "*.html"      , emit: report
     path "*_data"      , emit: data
     path "*_plots"     , optional:true, emit: plots
-    tuple val("${task.process}"), val('multiqc'), eval('multiqc --version | sed "s/.* //g"'), topic: versions, emit: versions_multiqc
+    tuple val("${task.process}"), val('multiqc'), eval('multiqc --version | sed "s/.* //g"'), emit: versions
+    // MultiQC should not push its versions to the `versions` topic. Its input depends on the versions topic to be resolved thus outputting to the topic will let the pipeline hang forever
 
     when:
     task.ext.when == null || task.ext.when
@@ -50,6 +51,5 @@ process MULTIQC {
     touch multiqc_data/.stub
     mkdir multiqc_plots
     touch multiqc_report.html
-
     """
 }

modules/nf-core/multiqc/meta.yml

@@ -1,6 +1,6 @@
 name: multiqc
-description: Aggregate results from bioinformatics analyses across many samples
-  into a single report
+description: Aggregate results from bioinformatics analyses across many samples into
+  a single report
 keywords:
   - QC
   - bioinformatics tools
@@ -28,8 +28,8 @@ input:
         - edam: http://edamontology.org/format_3750 # YAML
   - extra_multiqc_config:
       type: file
-      description: Second optional config yml for MultiQC. Will override common
-        sections in multiqc_config.
+      description: Second optional config yml for MultiQC. Will override common sections
+        in multiqc_config.
       pattern: "*.{yml,yaml}"
       ontologies:
         - edam: http://edamontology.org/format_3750 # YAML
@@ -73,18 +73,6 @@ output:
         description: Plots created by MultiQC
         pattern: "*_data"
         ontologies: []
-  versions_multiqc:
-    - - ${task.process}:
-          type: string
-          description: The process the versions were collected from
-      - multiqc:
-          type: string
-          description: The tool name
-      - multiqc --version | sed "s/.* //g":
-          type: eval
-          description: The expression to obtain the version of the tool
-
-topics:
   versions:
     - - ${task.process}:
           type: string

modules/nf-core/multiqc/tests/main.nf.test.snap

@@ -2,7 +2,7 @@
     "sarscov2 single-end [fastqc]": {
         "content": [
             {
-                "versions_multiqc": [
+                "versions": [
                     [
                         "MULTIQC",
                         "multiqc",
@@ -15,7 +15,7 @@
             "nf-test": "0.9.2",
             "nextflow": "25.04.6"
         },
-        "timestamp": "2025-10-28T15:27:59.813370216"
+        "timestamp": "2025-12-09T10:10:43.020315838"
     },
     "sarscov2 single-end [fastqc] - stub": {
         "content": [
@@ -24,7 +24,7 @@
                 "multiqc_data",
                 "multiqc_plots",
                 {
-                    "versions_multiqc": [
+                    "versions": [
                         [
                             "MULTIQC",
                             "multiqc",
@@ -38,12 +38,12 @@
             "nf-test": "0.9.2",
             "nextflow": "25.04.6"
         },
-        "timestamp": "2025-10-28T15:30:48.963962021"
+        "timestamp": "2025-12-09T10:11:14.131950776"
     },
     "sarscov2 single-end [fastqc] [config]": {
         "content": [
             {
-                "versions_multiqc": [
+                "versions": [
                     [
                         "MULTIQC",
                         "multiqc",
@@ -56,6 +56,6 @@
             "nf-test": "0.9.2",
             "nextflow": "25.04.6"
         },
-        "timestamp": "2025-10-28T15:29:30.664969334"
+        "timestamp": "2025-12-09T10:11:07.15692209"
     }
 }