pin node packages; switch to yarn

local/bin/sh/preinstall.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+# test if we are wrongly running `npm install` instead of yarn.
+if ! [[ $npm_config_user_agent == yarn* ]]
+then
+    echo "npm got replaced with yarn: install it with 'sudo npm install -g yarn' and run 'yarn' instead."
+    exit 1
+fi

local/bin/sh/run-site.sh

@@ -16,17 +16,11 @@ if [ ${RUN_SERVER} == true ]; then
 	# gulp
 	if [ ${RUN_GULP} == true ]; then
 		echo "checking that node modules are installed and up-to-date"
-		if [ -d node_modules ]; then
-		    MISSING=`npm ls --parseable=true 2>&1 >/dev/null | grep -oc "missing:"`
-		    if [ "$MISSING" -gt 0 ]; then
-                npm install || echo "arch conflicting detected. removing modules and trying again" && rm -rf node_modules && npm install
-            fi
-		else
-		    npm install || echo "arch conflicting detected. removing modules and trying again" && rm -rf node_modules && npm install
-        fi
-        echo "starting gulp build"
-        gulp build
-        sleep 5
+    npm --global install yarn && \
+    npm cache clean --force && yarn install --frozen-lockfile
+    echo "starting gulp build"
+    gulp build
+    sleep 5
 	fi
 
 	# integrations

package.json

@@ -22,37 +22,37 @@
     "node": ">= 4.5"
   },
   "dependencies": {
-    "algoliasearch": "^3.24.6",
-    "bootstrap": "^4.0.0-beta.2",
-    "browser-sync": "^2.18.13",
-    "del": "^2.2",
-    "gulp": "^3.9",
-    "gulp-autoprefixer": "^4.0.0",
-    "gulp-changed": "^3.1.1",
-    "gulp-concat": "^2.6",
-    "gulp-cssnano": "^2.1",
+    "algoliasearch": "3.24.6",
+    "bootstrap": "4.0.0-beta.2",
+    "browser-sync": "2.18.13",
+    "del": "2.2.2",
+    "gulp": "3.9.1",
+    "gulp-autoprefixer": "4.0.0",
+    "gulp-changed": "3.1.1",
+    "gulp-concat": "2.6.1",
+    "gulp-cssnano": "2.1.3",
     "gulp-hash": "4.1.1",
-    "gulp-if": "^2.0",
-    "gulp-jshint": "^2.0",
-    "gulp-plumber": "^1.0",
-    "gulp-rename": "^1.2",
-    "gulp-sass": "^3.0",
-    "gulp-uglify": "^3.0.0",
-    "jquery": "^3.2.1",
-    "jshint": "^2.9",
-    "jshint-stylish": "^2.0",
-    "lazypipe": "^1.0",
-    "lazysizes": "^4.0.1",
-    "merge-stream": "^1.0",
-    "minimist": "^1.1",
-    "mixitup": "^3.2.2",
-    "mousetrap": "^1.6.1",
-    "node-sass": "^4.7.2",
-    "picturefill": "^3.0.2",
-    "popper.js": "^1.13.0",
-    "run-sequence": "^1.1.4",
-    "stickyfilljs": "^2.0.3",
+    "gulp-if": "2.0.2",
+    "gulp-jshint": "2.1.0",
+    "gulp-plumber": "1.2.0",
+    "gulp-rename": "1.3.0",
+    "gulp-sass": "3.2.1",
+    "gulp-uglify": "3.0.0",
+    "jquery": "3.2.1",
+    "jshint": "2.9.5",
+    "jshint-stylish": "2.2.1",
+    "lazypipe": "1.0.1",
+    "lazysizes": "4.0.1",
+    "merge-stream": "1.0.1",
+    "minimist": "1.1.0",
+    "mixitup": "3.2.2",
+    "mousetrap": "1.6.1",
+    "node-sass": "4.7.2",
+    "picturefill": "3.0.2",
+    "popper.js": "1.13.0",
+    "run-sequence": "1.1.4",
+    "stickyfilljs": "2.0.3",
     "translate": "https://s3.amazonaws.com/origin-static-assets/corp-node-packages/master/translate-latest.tgz",
-    "traverse": "^0.6"
+    "traverse": "0.6.6"
   }
 }