chore: update npm scripts and synth.py (#356)

Update npm scripts: add clean, prelint, prefix; make sure that lint and fix are set properly. Use post-process feature of synthtool.

Author: alexander-fenster

packages/google-cloud-bigquery-datatransfer/package.json

@@ -31,15 +31,16 @@
     "samples-test": "cd samples/ && npm link ../ && npm install && npm test && cd ../",
     "system-test": "mocha build/system-test",
     "docs": "jsdoc -c .jsdoc.js",
-    "lint": "gts fix",
+    "lint": "gts check",
     "fix": "gts fix",
     "docs-test": "linkinator docs",
     "predocs-test": "npm run docs",
     "clean": "gts clean",
     "compile": "tsc -p . && cp -r protos build/",
     "compile-protos": "compileProtos src",
     "prepare": "npm run compile",
-    "prelint": "cd samples; npm link ../; npm install"
+    "prelint": "cd samples; npm link ../; npm install",
+    "precompile": "gts clean"
   },
   "dependencies": {
     "google-gax": "^2.1.0"

packages/google-cloud-bigquery-datatransfer/synth.py

@@ -1,7 +1,7 @@
 import synthtool as s
 import synthtool.gcp as gcp
+import synthtool.languages.node as node
 import logging
-import subprocess
 
 logging.basicConfig(level=logging.DEBUG)
 
@@ -34,6 +34,4 @@
 templates = common_templates.node_library(source_location='build/src')
 s.copy(templates)
 
-subprocess.run(['npm', 'install'])
-subprocess.run(['npm', 'run', 'fix'])
-subprocess.run(['npx', 'compileProtos', 'src'])
+node.postprocess_gapic_library()