Fixed Travis CI configuration and build.sh script

Travis CI uses by default ruby language so set it to minimal instead.
Travis CI uses dash as POSIX shell, requiring strict POSIX syntax in
build.sh script.

Signed-off-by: Dmitri Rubinstein <[email protected]>

Author: dmrub

.travis.yml

@@ -1,4 +1,5 @@
 sudo: required
+language: minimal
 services:
 - docker
 addons:

build.sh

@@ -7,9 +7,9 @@ if [ ! "$arch" = "x86_64" ] ; then
     exit 1
 fi
 
-if [ ! $http_proxy == "" ] 
+if [ ! "$http_proxy" = "" ]
 then
-    docker build --no-cache --build-arg https_proxy=$https_proxy --build-arg http_proxy=$http_proxy -t functions/of-watchdog:build .
+    docker build --no-cache --build-arg "https_proxy=$https_proxy" --build-arg "http_proxy=$http_proxy" -t functions/of-watchdog:build .
 else
     docker build -t functions/of-watchdog:build .
 fi
@@ -23,4 +23,3 @@ docker cp buildoutput:/go/src/github.com/openfaas-incubator/of-watchdog/of-watch
 docker cp buildoutput:/go/src/github.com/openfaas-incubator/of-watchdog/of-watchdog.exe ./of-watchdog.exe
 
 docker rm buildoutput
-