deps: use new cds build API @sap/cds-dk >= 7.5.0 (#508)

postgres/cds-plugin.js

@@ -1,11 +1,48 @@
 const cds = require('@sap/cds')
+const { fs, path } = cds.utils
 
 if (!cds.env.fiori.lean_draft) {
   throw new Error('"@cap-js/postgres" only works if cds.fiori.lean_draft is enabled. Please adapt your configuration.')
 }
 
-// requires @sap/cds-dk version >= 7.3.2
-cds.build?.register?.('postgres', {
-  impl: '@cap-js/postgres/lib/build.js',
-  taskDefaults: { src: cds.env.folders.db }
+// requires @sap/cds-dk version >= 7.5.0
+cds.build?.register?.('postgres', class PostgresBuildPlugin extends cds.build.Plugin {
+
+  static taskDefaults = { src: cds.env.folders.db }
+
+  static hasTask() { return cds.requires.db?.kind === 'postgres' }
+
+  init() {
+    // different from the default build output structure
+    this.task.dest = path.join(cds.root, cds.env.build.target !== '.' ? cds.env.build.target : 'gen', 'pg')
+  }
+
+  async build() {
+    const model = await this.model()
+    if (!model) return
+
+    const promises = []
+    if (fs.existsSync(path.join(this.task.src, 'package.json'))) {
+      promises.push(this.copy(path.join(this.task.src, 'package.json')).to('package.json'))
+    } else {
+      promises.push(
+        this.write({
+          dependencies: { '@sap/cds': '^7', '@cap-js/postgres': '^1' },
+          scripts: { start: 'cds-deploy' },
+        }).to('package.json'),
+      )
+    }
+    promises.push(this.write(cds.compile.to.json(model)).to(path.join('db', 'csn.json')))
+
+    let data
+    if (fs.existsSync(path.join(this.task.src, 'data'))) {
+      data = 'data'
+    } else if (fs.existsSync(path.join(this.task.src, 'csv'))) {
+      data = 'csv'
+    }
+    if (data) {
+      promises.push(this.copy(data).to(path.join('db', 'data')))
+    }
+    return Promise.all(promises)
+  }
 })

postgres/package.json

@@ -36,7 +36,7 @@
   },
   "peerDependencies": {
     "@sap/cds": ">=7.6",
-    "@sap/cds-dk": ">=7"
+    "@sap/cds-dk": ">=7.5"
   },
   "peerDependenciesMeta": {
     "@sap/cds-dk": {