Fix preval cache issues

webpack/loaders/git-loader.js

@@ -0,0 +1,8 @@
+const { resolve } = require('path');
+
+// Forces recompile whenever the current commit changes
+// Useful for generating the version hash in the UI
+module.exports = function(source, map) {
+  this.addDependency(resolve(__dirname, '../../.git/logs/HEAD'));
+  this.callback(null, source, map);
+};

webpack/rules/babel-git.js

@@ -1,6 +1,9 @@
 const { resolve } = require('path');
 const { env } = require('../configuration');
 
+// This is a hack, used in conjunction with rules/git-refresh.js
+// https://github.com/kentcdodds/babel-plugin-preval/issues/19
+
 module.exports = {
   test: resolve(__dirname, '../../app/soapbox/utils/code.js'),
   use: [

webpack/rules/git-refresh.js

@@ -0,0 +1,9 @@
+const { resolve } = require('path');
+
+// Recompile code.js whenever git changes
+module.exports = {
+  test: resolve(__dirname, '../../app/soapbox/utils/code.js'),
+  use: {
+    loader: resolve(__dirname, '../loaders/git-loader.js'),
+  },
+};

webpack/rules/index.js

@@ -1,5 +1,6 @@
 const babel = require('./babel');
 const git = require('./babel-git');
+const gitRefresh = require('./git-refresh');
 const css = require('./css');
 const file = require('./file');
 const nodeModules = require('./node_modules');
@@ -13,4 +14,5 @@ module.exports = [
   nodeModules,
   babel,
   git,
+  gitRefresh,
 ];