add check for windows eol on commit

removes windows eols from some files

scripts/checkeol.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+function checkEOL {
+  local changedFiles=$(git --no-pager diff --name-only -M100% --diff-filter=AM --relative $(git merge-base FETCH_HEAD origin/HEAD) FETCH_HEAD)
+  local result=0
+  for name in $changedFiles; do
+    grep  -c -U -q $'\r' $name
+      if [ $? -eq 0 ]; then
+        echo "windows eol found in $name" >&2
+        result=1
+      fi
+  done
+  if [ $result -eq 1 ]; then
+    false
+  fi
+}
+
+checkEOL

scripts/ci.sh

@@ -3,6 +3,10 @@
 NODE_INDEX="$1"
 TOTAL_NODES="$2"
 
+function checkEOL {
+  ./scripts/checkeol.sh
+}
+
 typecheck() {
   npm install -g flow-bin
   flow --version
@@ -47,6 +51,7 @@ doctest() {
 }
 
 oneNode() {
+  checkEOL
   doctest
   lint
   typecheck
@@ -57,7 +62,7 @@ oneNode() {
 twoNodes() {
   case "$NODE_INDEX" in
     0) doctest; lint; integrationtest;;
-    1) typecheck; unittest;;
+    1) checkEOL; typecheck; unittest;;
     *) echo "ERROR: invalid usage"; exit 2;;
   esac
 }
@@ -65,7 +70,7 @@ twoNodes() {
 threeNodes() {
   case "$NODE_INDEX" in
     0) doctest; lint; integrationtest;;
-    1) typecheck;;
+    1) checkEOL; typecheck;;
     2) unittest;;
     *) echo "ERROR: invalid usage"; exit 2;;
   esac