lookupTasks becomes optional

- change output dir

cds-plugin-openapi/index.js

@@ -3,7 +3,6 @@ const path = require("path")
 const fs = require("fs")
 const cds = require('@sap/cds'), { BuildTaskProvider, BuildTaskHandler } = cds.build
 const cdsdk = require('@sap/cds-dk')
-const { path4 } = cds.serve
 const logger = cds.log("build")
 
 module.exports.activate = () => {
@@ -18,15 +17,10 @@ module.exports.activate = () => {
             applyTaskDefaults(task) {
                 task.src = task.src || cds.env.folders.srv.replace(/\/$/, '')
             }
-            async lookupTasks() {
-                if (process.env.NODE_ENV === 'production') {
-                    return [{ for: this.id }]
-                }
-            }
             get handler() {
                 return class extends BuildTaskHandler {
                     async clean() {
-                        fs.rm(path.join(this.task.dest, "gen/docs"), { recursive: true, force: true }, (err) => logger.error(err))
+                        fs.rm(path.join(this.task.dest, "openapi-docs"), { recursive: true, force: true }, (err) => err ? logger.error(err) : '')
                     }
 
                     async build() {
@@ -37,15 +31,23 @@ module.exports.activate = () => {
                         await Promise.all(cds.linked(model).services.map(service => {
                             const openApi = cdsdk.compile.to.openapi(model, {
                                 service: service.name,
-                                'openapi:url': path4(service).replace(/\.[^.]+$/, ''),
-                                'openapi:diagram': options.diagram
+                                'openapi:diagram': String(options.diagram) === 'true'
                             })
-
-                            this.write(openApi).to(`gen/docs/${service.name}.openapi3.json`)
+                            this.write(openApi).to(`openapi-docs/${service.name}.openapi3.json`)
                         }))
                     }
                 }
             }
+            /**
+             * Additional constraints can be defined, e.g. generate openapi service specification in production builds only.
+             * > cds build --production
+             * > cds build --for node-cf --production 
+             */ 
+            // async lookupTasks() {
+            //     if (process.env.NODE_ENV === 'production') {
+            //         return [{ for: this.id }]
+            //     }
+            // }
         })()
     )
 }