Download dependencies of the target project

Author: jfmengels

lib/elm-binary.js

@@ -63,6 +63,29 @@ async function getElmVersion(elmBinary) {
   return trimVersion(result.stdout.toString());
 }
 
+/** Download the dependencies of the project to analyze.
+ *
+ * @param {Path} elmBinary
+ * @param {Path} elmJsonPath
+ * @return {Promise<void>}
+ */
+async function downloadDependenciesOfElmJson(elmBinary, elmJsonPath) {
+  const result = spawn.sync(elmBinary, ['make', '--report=json'], {
+    cwd: path.dirname(elmJsonPath),
+    silent: false,
+    env: process.env
+  });
+
+  if (result.status !== 0) {
+    const error = JSON.parse(result.stderr.toString());
+    // TODO Check for other kinds of errors
+    if (error.title !== 'NO INPUT') {
+      // TODO Print error nicely
+      throw new Error(error);
+    }
+  }
+}
+
 /**
  * @param {string} version
  * @return {string}
@@ -78,5 +101,6 @@ function trimVersion(version) {
 
 module.exports = {
   getElmBinary,
-  getElmVersion
+  getElmVersion,
+  downloadDependenciesOfElmJson
 };

lib/main.js

@@ -17,6 +17,8 @@ const NewRule = require('./new-rule');
 const Anonymize = require('./anonymize');
 const newPackage = require('./new-package');
 const AppWrapper = require('./app-wrapper');
+const ElmFiles = require('./elm-files');
+const ElmBinary = require('./elm-binary');
 const ResultCache = require('./result-cache');
 const ErrorMessage = require('./error-message');
 const SuppressedErrors = require('./suppressed-errors');
@@ -107,7 +109,10 @@ async function runElmReviewInWatchMode() {
 }
 
 async function prepareOffline() {
-  const {elmModulePath, reviewElmJson, appHash} = await Builder.build(options);
+  const elmBinary = await ElmBinary.getElmBinary(options);
+  await ElmBinary.downloadDependenciesOfElmJson(elmBinary, options.elmJsonPath);
+
+  const {elmModulePath, reviewElmJson} = await Builder.build(options);
 
   if (!elmModulePath) {
     AppState.exitRequested(1);