Added Shellcheck script and CI config. Closes sstephenson#14. (sstephenson#238)

Added Shellcheck script and CI config. Closes sstephenson#14.

Author: sublimino

.travis.yml

@@ -20,8 +20,19 @@ matrix:
 services:
   - docker
 
+before_script:
+ - |
+   if [[ "${TRAVIS_OS_NAME:-}" == 'linux' ]]; then
+     sudo apt-get install shellcheck
+   fi
+
 script:
 - |
+  if [[ "${TRAVIS_OS_NAME:-}" == 'linux' ]]; then
+    # @todo: Remove "|| true" once all coding standards issues are fixed.
+    ./shellcheck.sh || true
+  fi
+
   if [[ "${TRAVIS_OS_NAME:-}" == 'linux' && -n "${BASHVER}" ]]; then
     docker build --build-arg bashver="${BASHVER}" --tag "bats/bats:bash-${BASHVER}" . &&
       docker run -it "bash:${BASHVER}" --version &&

shellcheck.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+set -e
+
+targets=()
+while IFS=  read -r -d $'\0'; do
+    targets+=("$REPLY")
+done < <(
+  find \
+    bin/bats \
+    libexec/bats-core \
+    shellcheck.sh \
+    -type f \
+    -print0
+  )
+
+for file in "${targets[@]}"; do
+  [ -f "${file}" ] && LC_ALL=C.UTF-8 shellcheck "${file}"
+done;