chore: update npm scripts and synth.py (#529)

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

package.json

@@ -30,7 +30,7 @@
   "scripts": {
     "docs": "jsdoc -c .jsdoc.js",
     "predocs": "npm run compile",
-    "lint": "gts fix",
+    "lint": "gts check",
     "samples-test": "cd samples/ && npm link ../ && npm test && cd ../",
     "system-test": "mocha build/system-test --timeout 600000",
     "test": "c8 mocha build/test",
@@ -41,7 +41,9 @@
     "presystem-test": "npm run compile",
     "docs-test": "linkinator docs",
     "predocs-test": "npm run docs",
-    "prelint": "cd samples; npm link ../; npm install"
+    "prelint": "cd samples; npm link ../; npm install",
+    "clean": "gts clean",
+    "precompile": "gts clean"
   },
   "dependencies": {
     "@google-cloud/common": "^3.0.0",

synth.py

@@ -16,8 +16,8 @@
 
 import synthtool as s
 import synthtool.gcp as gcp
+import synthtool.languages.node as node
 import logging
-import subprocess
 
 # Run the gapic generator
 gapic = gcp.GAPICMicrogenerator()
@@ -43,7 +43,4 @@
 templates = common_templates.node_library(source_location='build/src')
 s.copy(templates, excludes=[])
 
-# Node.js specific cleanup
-subprocess.run(["npm", "install"])
-subprocess.run(["npm", "run", "lint"])
-subprocess.run(["npx", "compileProtos", "src"])
+node.postprocess_gapic_library()