Parallelize CircleCI tests

bin/ci.sh

@@ -0,0 +1,54 @@
+#!/bin/bash -ex
+
+NODE_INDEX="$1"
+TOTAL_NODES="$2"
+
+typecheck() {
+  npm install -g flow-bin
+  npm run typecheck
+}
+
+lint() {
+  REPO_URL="https://raw.githubusercontent.com/ripple/javascript-style-guide"
+  npm install -g eslint
+  npm install -g esprima-fb   # allow flow type annotations in eslint
+  curl "$REPO_URL/es6/eslintrc" > ./eslintrc
+  echo "parser: esprima-fb" >> ./eslintrc
+  eslint --reset -c ./eslintrc $(git --no-pager diff --name-only -M100% --diff-filter=AM --relative $(git merge-base FETCH_HEAD origin/HEAD) FETCH_HEAD | grep "\.js$")
+}
+
+unittest() {
+  npm test --coverage
+  npm run coveralls
+}
+
+oneNode() {
+  lint
+  typecheck
+  unittest
+}
+
+twoNodes() {
+  case "$NODE_INDEX" in
+    0) lint && unittest;;
+    1) typecheck;;
+    *) echo "ERROR: invalid usage"; exit 2;;
+  esac
+}
+
+threeNodes() {
+  case "$NODE_INDEX" in
+    0) lint;;
+    1) typecheck;;
+    2) unittest;;
+    *) echo "ERROR: invalid usage"; exit 2;;
+  esac
+}
+
+case "$TOTAL_NODES" in
+  "") oneNode;;
+  1) oneNode;;
+  2) twoNodes;;
+  3) threeNodes;;
+  *) echo "ERROR: invalid usage"; exit 2;;
+esac