feat(detectExecuteScan) Added npm install step for detectExectueScan (#4949)

* Added npm install step for detectExectueScan

Author: andrew-kireev

cmd/detectExecuteScan.go

@@ -20,6 +20,7 @@ import (
 	piperhttp "github.com/SAP/jenkins-library/pkg/http"
 	"github.com/SAP/jenkins-library/pkg/log"
 	"github.com/SAP/jenkins-library/pkg/maven"
+	"github.com/SAP/jenkins-library/pkg/npm"
 	"github.com/SAP/jenkins-library/pkg/orchestrator"
 	"github.com/SAP/jenkins-library/pkg/piperutils"
 	"github.com/SAP/jenkins-library/pkg/reporting"
@@ -213,6 +214,22 @@ func runDetect(ctx context.Context, config detectExecuteScanOptions, utils detec
 		}
 	}
 
+	// Install NPM dependencies
+	if config.InstallNPM {
+		log.Entry().Debugf("running npm install")
+		npmExecutor := npm.NewExecutor(npm.ExecutorOptions{DefaultNpmRegistry: config.DefaultNpmRegistry})
+
+		buildDescriptorList := config.BuildDescriptorList
+		if len(buildDescriptorList) == 0 {
+			buildDescriptorList = []string{"package.json"}
+		}
+
+		err := npmExecutor.InstallAllDependencies(buildDescriptorList)
+		if err != nil {
+			return err
+		}
+	}
+
 	// for MTA
 	if config.BuildMTA {
 		log.Entry().Infof("running MTA Build")

cmd/detectExecuteScan_generated.go

@@ -266,6 +266,32 @@ spec:
           - STEPS
           - STAGES
           - PARAMETERS
+      - name: installNPM
+        type: bool
+        default: false
+        description:
+          "Experiment parameter for downloading npm dependencies"
+        scope:
+          - STEPS
+          - STAGES
+          - PARAMETERS
+      - name: defaultNpmRegistry
+        type: string
+        description: "URL of the npm registry to use. Defaults to https://registry.npmjs.org/"
+        scope:
+          - PARAMETERS
+          - GENERAL
+          - STAGES
+          - STEPS
+        aliases:
+          - name: npm/defaultNpmRegistry
+      - name: buildDescriptorList
+        type: "[]string"
+        description: List of build descriptors and therefore modules for execution of the npm scripts. The elements have to be paths to the build descriptors.
+        scope:
+          - PARAMETERS
+          - STAGES
+          - STEPS
       - name: enableDiagnostics
         type: bool
         default: false