fix(cache): reset corrupted caches (#375)

index.js

@@ -356,9 +356,15 @@ class HardSourceWebpackPlugin {
             contextNormalModuleId,
             copyWithDeser,
           }),
-        ]).then(() => {
-          // console.log('cache in', Date.now() - start);
-        });
+        ])
+          .catch(error => {
+            logMessages.serialBadCache(compiler, error);
+
+            return rimraf(cacheDirPath);
+          })
+          .then(() => {
+            // console.log('cache in', Date.now() - start);
+          });
       });
     }
 

lib/util/log-messages.js

@@ -43,6 +43,16 @@ exports.cacheNoParity = (compiler, { parityRoot }) => {
   );
 };
 
+exports.serialBadCache = (compiler, error) => {
+  const loggerSerial = new LoggerFactory(compiler).create().from('serial');
+  loggerSerial.error(
+    {
+      id: 'serialzation--bad-cache',
+    },
+    ['Cache is corrupted.', error.stack || error.message || error].join('\n'),
+  );
+};
+
 const logCore = compiler => new LoggerFactory(compiler).create().from('core');
 
 exports.configHashSetButNotUsed = (compiler, { cacheDirectory }) => {

tests/fixtures/serializer-append-2-base-1dep-bad-cache/fib.js

@@ -0,0 +1,3 @@
+module.exports = function(n) {
+  return n + (n > 0 ? n - 1 : 0);
+};

tests/fixtures/serializer-append-2-base-1dep-bad-cache/index.js

@@ -0,0 +1,3 @@
+var fib = require('./fib');
+
+console.log(fib(3));

tests/fixtures/serializer-append-2-base-1dep-bad-cache/webpack.config.js

@@ -0,0 +1,20 @@
+var HardSourceWebpackPlugin = require('../../..');
+var SerializerAppend2Plugin = require('../../../lib/SerializerAppend2Plugin');
+
+module.exports = {
+  context: __dirname,
+  entry: './index.js',
+  output: {
+    path: __dirname + '/tmp',
+    filename: 'main.js',
+  },
+  plugins: [
+    new HardSourceWebpackPlugin({
+      cacheDirectory: 'cache',
+      environmentHash: {
+        root: __dirname + '/../../..',
+      },
+    }),
+    new SerializerAppend2Plugin(),
+  ],
+};

tests/serializers.js

@@ -136,4 +136,10 @@ describe('hard source serializers - serializer abilities', function() {
     });
   });
 
+  itCompilesChange('serializer-append-2-base-1dep-bad-cache', {}, {
+    'tmp/cache/module/log0000': '',
+  }, function(output) {
+    expect(output.run2).to.eql(output.run2);
+  });
+
 });