feat(test): add test_downstream_projects script

package.json

@@ -22,6 +22,7 @@
     "modify_sourcemap_paths": "./modify_sourcemap_paths.js",
     "release": "./release.js",
     "show_changelog": "./show_changelog.js",
+    "test_downstream_projects": "./test_downstream_projects.js",
     "util": "./util.js"
   },
   "dependencies": {

test_downstream_projects.js

@@ -0,0 +1,68 @@
+#!/usr/bin/env node
+const fs = require('fs');
+const path = require('path');
+
+const util = require('./util');
+
+util.packageDir();
+const PKG_DIR = process.cwd();
+
+const config = JSON.parse(fs.readFileSync('downstream_projects.json'));
+const pkgjson = JSON.parse(fs.readFileSync('package.json'));
+
+const DOWNSTREAMS_PATH = path.resolve(PKG_DIR, 'downstream_projects');
+
+function makeWorkingCopy() {
+  process.chdir(PKG_DIR);
+  if (!fs.existsSync(DOWNSTREAMS_PATH)) {
+    console.log('making downstream_projects working directory');
+    fs.mkdirSync(DOWNSTREAMS_PATH);
+  }
+}
+
+function localPublish() {
+  process.chdir(PKG_DIR);
+  console.log('Publishing using yalc...');
+  util._exec('yalc publish');
+}
+
+function cloneDownstreamProjects() {
+  Object.keys(config).forEach(key => {
+    process.chdir(DOWNSTREAMS_PATH);
+    const giturl = config[key];
+    const projectPath = path.resolve(DOWNSTREAMS_PATH, key);
+    if (!fs.existsSync(projectPath)) {
+      console.log('cloning from ' + giturl);
+      util._exec('git clone '+ giturl + ' ' + key);
+    }
+    process.chdir(projectPath);
+    console.log('cleaning ' + projectPath);
+    util._exec('git fetch origin');
+    util._exec('git reset --hard origin/master');
+    util._exec('git clean --force -d');
+  })
+}
+
+function installDownstreamDeps() {
+  Object.keys(config).forEach(key => {
+    const projectPath = path.resolve(DOWNSTREAMS_PATH, key);
+    process.chdir(projectPath);
+    util._exec('yarn install --check-files');
+    util._exec('yalc add ' + pkgjson.name);
+  })
+}
+
+function testDownstreamDeps() {
+  Object.keys(config).forEach(key => {
+    const projectPath = path.resolve(DOWNSTREAMS_PATH, key);
+    process.chdir(projectPath);
+    util._exec('yarn test');
+  })
+}
+
+
+makeWorkingCopy();
+localPublish();
+cloneDownstreamProjects();
+installDownstreamDeps();
+testDownstreamDeps();