Added schema validation settings

assets/schema_contrasts.json

@@ -0,0 +1,39 @@
+{
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "$id": "https://example.com/schemas/schema_contrasts.json",
+    "title": "nf-core/differentialabundance pipeline - params.contrasts schema",
+    "description": "Schema for the file provided with params.contrasts",
+    "type": "object",
+    "properties": {
+        "contrasts": {
+            "type": "array",
+            "items": {
+                "type": "object",
+                "properties": {
+                    "id": {
+                        "type": "string"
+                    },
+                    "comparison": {
+                        "type": "array",
+                        "items": {
+                            "type": "string"
+                        },
+                        "minItems": 1
+                    },
+                    "blocking_factors": {
+                        "type": "array",
+                        "items": {
+                            "type": "string"
+                        },
+                        "minItems": 1
+                    }
+                },
+                "required": ["id", "comparison"],
+                "additionalProperties": false
+            },
+            "minItems": 1
+        }
+    },
+    "required": ["contrasts"],
+    "additionalProperties": false
+}

nextflow.config

@@ -408,7 +408,7 @@ manifest {
 
 // Nextflow plugins
 plugins {
-    id 'nf-schema@2.1.1' // Validation of pipeline parameters and creation of an input channel from a sample sheet
+    id 'nf-schema@2.2.1' // Validation of pipeline parameters and creation of an input channel from a sample sheet
 }
 
 validation {

nextflow_schema.json

@@ -43,6 +43,7 @@
                     "description": "A CSV file describing sample contrasts",
                     "help_text": "This file is used to define groups of samples from 'input' to compare.  It must contain at least the columns 'variable', 'reference', 'target' and 'blocking', where 'variable' is a column in the input sample sheet, 'reference' and 'target' are values in that column, and blocking is a colon-separated list of additional 'blocking' variables (can be an empty string)",
                     "pattern": "^\\S+\\.(yaml|yml|csv)$",
+                    "schema": "assets/schema_contrasts.json",
                     "format": "file-path",
                     "mimetype": "text/csv",
                     "fa_icon": "fas fa-adjust"