Use fingerprint to invalidate cache

circle.yml

@@ -18,10 +18,14 @@ dependencies:
     - nvm install 4.4.7
     - nvm use 4.4.7
     - npm install -g npm
+    - script/fingerprint-clean
 
   override:
     - script/bootstrap
 
+  post:
+    - script/fingerprint-write
+
   cache_directories:
     - apm/node_modules
     - build/node_modules

script/fingerprint-clean

@@ -0,0 +1,23 @@
+#!/usr/bin/env node
+var fingerprint = require('./utils/fingerprint')
+
+if (fingerprint.fingerprintMatches()) {
+  console.log('node_modules matches current fingerprint ' + fingerprint.fingerprint() + ' - not removing')
+  return
+}
+
+var fsPlus
+try {
+  fsPlus = require('fs-plus')
+} catch (error) {
+  console.log(error.message)
+  return
+}
+
+try {
+  fsPlus.removeSync(path.resolve(__dirname, '..', 'node_modules'))
+  fsPlus.removeSync(path.resolve(__dirname, '..', 'apm', 'node_modules'))
+} catch (error) {
+  console.error(error.message)
+  process.exit(1)
+}

script/fingerprint-write

@@ -0,0 +1,2 @@
+#!/usr/bin/env node
+require('./utils/fingerprint').writeFingerprint()