Fix for windows build environment

.travis.yml

@@ -5,21 +5,18 @@ addons:
   apt:
     update: true
     packages: [bash, mksh, yash, zsh, shellcheck]
-  homebrew:
-    update: true
-    packages: [shellcheck]
 jobs:
   include:
     - os: linux
       dist: bionic
-      env: COVERAGE=1
+      env: COVERAGE=1 SHELLCHECK=1
       services: docker
     - os: osx
       osx_image: xcode11.3
     - os: windows
 before_install:
   - curl -fsSL https://git.io/shellspec | sh -s master -y
 script:
-  - make test
-  - make check
+  - ./test.sh
+  - if [ "$SHELLCHECK" ]; then make check; fi
   - if [ "$COVERAGE" ]; then make coveralls; fi

Makefile

@@ -1,10 +1,7 @@
 all:	test check
 
 test:
-	if type bash; then shellspec -s bash --no-quick; fi
-	if type zsh;  then shellspec -s zsh --no-quick;  fi
-	if type mksh; then shellspec -s mksh --no-quick; fi
-	if type yash; then shellspec -s yash --no-quick; fi
+	./test.sh
 
 check:
 	shellcheck shellmetrics spec/*.sh

test.sh

@@ -0,0 +1,6 @@
+#!/bin/sh -ex
+type bash && shellspec -s bash --no-quick
+type zsh  && shellspec -s zsh  --no-quick
+type mksh && shellspec -s mksh --no-quick
+type yash && shellspec -s yash --no-quick
+echo Done