Merge pull request #810 from jenkinsci/no-cygwin-in-batch

remove the need for cygwin

vars.cmd

@@ -10,12 +10,17 @@ set JENKINS_JAVA_OPTS=-Xmx1280m
 @REM Jenkins binds to 0.0.0.0 (OMG) so we can use any network but the docker network.
 @REM but we may as well use the default network
 @echo off
-FOR /F "tokens=* USEBACKQ" %%F IN (`netsh interface ipv4 show addresses "vEthernet (WSL)" ^| grep "IP Address:" ^| gawk '{print $3}'`) DO (
+FOR /f "tokens=3" %%F in ('netsh interface ipv4 show addresses "vEthernet (WSL)" ^| findstr /c:"IP Address:"') DO (
 SET IP=%%F
 )
+IF NOT DEFINED IP (
+  echo "*** ERROR could not find the docker interface - is docker started?"
+  exit /b 1
+)
+
 @echo on
 set SELENIUM_PROXY_HOSTNAME=%IP%
 set JENKINS_LOCAL_HOSTNAME=%IP%
 @echo.
 @echo To start the remote firefox container run the following command:
-@echo docker run --shm-size=256m -d -p 127.0.0.1:4444:4444 -p 127.0.0.1:5900:5900 -e no_proxy=localhost -e SCREEN_WIDTH=1680 -e SCREEN_HEIGHT=1090 selenium/standalone-firefox-debug:3.141.59
+@echo docker run --shm-size=256m -d -p 127.0.0.1:4444:4444 -p 127.0.0.1:5900:5900 -e no_proxy=localhost -e SCREEN_WIDTH=1680 -e SCREEN_HEIGHT=1090 selenium/standalone-firefox-debug:3.141.59