Add shellcheck to the build

.travis/after_script.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+set -e
+
+if [ "$TYPE" != 'style' ]; then
+	ccache -s
+fi

.travis/install.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+set -e
+
+if [ "$TYPE" = 'style' ]; then
+	sudo apt-get -yqq update
+	sudo apt-get install shellcheck
+else
+	"$TRAVIS_BUILD_DIR/.travis/$TRAVIS_OS_NAME.$TARGET_OS.before_install.sh"
+	"$TRAVIS_BUILD_DIR/.travis/$TRAVIS_OS_NAME.$TARGET_OS.install.sh"
+fi

.travis/linux..before_install.sh

@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+set -e
+
 sudo add-apt-repository ppa:andrewrk/libgroove -y
 sudo sed -e "s/trusty/precise/" -i \
 	/etc/apt/sources.list.d/andrewrk-libgroove-trusty.list

.travis/linux..install.sh

@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+set -e
+
 PACKAGES="cmake libsndfile-dev fftw3-dev libvorbis-dev  libogg-dev
 	libasound2-dev libjack-dev libsdl-dev libsamplerate0-dev libstk0-dev
 	libfluidsynth-dev portaudio19-dev wine-dev g++-multilib libfltk1.3-dev

.travis/linux..script.sh

@@ -1,4 +1,6 @@
 #!/usr/bin/env bash
 
+set -e
+
 # shellcheck disable=SC2086
 cmake -DUSE_WERROR=ON $CMAKE_FLAGS ..

.travis/linux.win.download.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+
 set -e
 
 CACHE_DIR=$TRAVIS_BUILD_DIR/apt_mingw_cache/$1

.travis/linux.win32.before_install.sh

@@ -1,4 +1,6 @@
 #!/usr/bin/env bash
 
+set -e
+
 sudo add-apt-repository ppa:tobydox/mingw-x-trusty -y
 sudo apt-get update -qq

.travis/linux.win32.install.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+
 set -e
 
 if [ "$QT5" ]; then
@@ -15,10 +16,7 @@ MINGW_PACKAGES="mingw32-x-sdl mingw32-x-libvorbis mingw32-x-fluidsynth mingw32-x
 
 export MINGW_PACKAGES
 
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-
-# shellcheck disable=SC1090
-. "$DIR/linux.win.download.sh" win32
+"$TRAVIS_BUILD_DIR/.travis/linux.win.download.sh" win32
 
 PACKAGES="nsis cloog-isl libmpc3 qt4-linguist-tools mingw32 $MINGW_PACKAGES"
 
@@ -29,6 +27,6 @@ sudo apt-get install -y $PACKAGES
 # to use @file command line passing, which in turn ccache 3.1.9 doesn't support
 pushd /tmp
 wget http://archive.ubuntu.com/ubuntu/pool/main/c/ccache/ccache_3.2.4-1_amd64.deb
-sha256sum -c $TRAVIS_BUILD_DIR/.travis/ccache.sha256
+sha256sum -c "$TRAVIS_BUILD_DIR/.travis/ccache.sha256"
 sudo dpkg -i ccache_3.2.4-1_amd64.deb
 popd

.travis/linux.win32.script.sh

@@ -1,4 +1,6 @@
 #!/usr/bin/env bash
 
+set -e
+
 export CMAKE_OPTS="$CMAKE_FLAGS -DUSE_WERROR=ON"
 ../cmake/build_mingw32.sh

.travis/linux.win64.before_install.sh

@@ -1,3 +1,5 @@
 #!/usr/bin/env bash
 
-. .travis/linux.win32.before_install.sh
+set -e
+
+"$TRAVIS_BUILD_DIR/.travis/linux.win32.before_install.sh"

.travis/linux.win64.install.sh

@@ -1,11 +1,9 @@
 #!/usr/bin/env bash
+
 set -e
 
 # First, install 32-bit deps
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-# shellcheck disable=SC1090
-. "$DIR/linux.win32.install.sh"
-
+"$TRAVIS_BUILD_DIR/.travis/linux.win32.install.sh"
 
 if [ "$QT5" ]; then
 	MINGW_PACKAGES="mingw64-x-qt5base"
@@ -21,9 +19,7 @@ MINGW_PACKAGES="mingw64-x-sdl mingw64-x-libvorbis mingw64-x-fluidsynth mingw64-x
 
 export MINGW_PACKAGES
 
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-# shellcheck disable=SC1090
-. "$DIR/linux.win.download.sh" win64
+"$TRAVIS_BUILD_DIR/.travis/linux.win.download.sh" win64
 
 # shellcheck disable=SC2086
 sudo apt-get install -y $MINGW_PACKAGES

.travis/linux.win64.script.sh

@@ -1,4 +1,6 @@
 #!/usr/bin/env bash
 
+set -e
+
 export CMAKE_OPTS="$CMAKE_FLAGS -DUSE_WERROR=ON"
 ../cmake/build_mingw64.sh

.travis/osx..before_install.sh

@@ -1,3 +1,5 @@
 #!/usr/bin/env bash
 
+set -e
+
 brew update

.travis/osx..install.sh

@@ -1,20 +1,40 @@
 #!/usr/bin/env bash
 
-PACKAGES="cmake pkgconfig fftw libogg libvorbis libsndfile libsamplerate jack sdl stk portaudio node fltk"
+set -e
+
+PACKAGES="cmake pkg-config fftw libogg libvorbis libsndfile libsamplerate jack sdl stk portaudio node fltk"
 
 if [ "$QT5" ]; then
-	PACKAGES="$PACKAGES homebrew/versions/qt55"
+	PACKAGES="$PACKAGES qt@5.5"
 else
-	PACKAGES="$PACKAGES cartr/qt4/qt"
+	PACKAGES="$PACKAGES cartr/qt4/qt@4"
 fi
 
+if "${TRAVIS}"; then
+   PACKAGES="$PACKAGES ccache"
+fi
+
+# removing already installed packages from the list
+for p in $(brew list); do
+	PACKAGES=${PACKAGES//$p/}
+done;
+
 # shellcheck disable=SC2086
-brew install $PACKAGES ccache
+brew install $PACKAGES
 
 # Recompile fluid-synth without CoreAudio per issues #649
 # Changes to fluid-synth.rb must be pushed to URL prior to use
-url=$(git remote get-url origin)
-branch=$(git symbolic-ref --short HEAD)
-brew install --build-from-source "$url/raw/$branch/cmake/apple/fluid-synth.rb"
+if [ "$TRAVIS_EVENT_TYPE" == "pull_request" ]; then
+	slug=$TRAVIS_PULL_REQUEST_SLUG
+	branch=$TRAVIS_PULL_REQUEST_BRANCH
+elif "${TRAVIS}"; then
+	slug=$TRAVIS_REPO_SLUG
+	branch=$TRAVIS_BRANCH
+else
+	slug="LMMS/lmms"
+	branch=$(git symbolic-ref --short HEAD)
+fi
+
+brew install --build-from-source "https://raw.githubusercontent.com/${slug}/${branch}/cmake/apple/fluid-synth.rb"
 
 sudo npm install -g appdmg

.travis/osx..script.sh

@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+set -e
+
 if [ "$QT5" ]; then
         # Workaround; No FindQt5.cmake module exists
         CMAKE_PREFIX_PATH="$(brew --prefix qt55)"

.travis/script.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+
+set -e
+
+if [ "$TYPE" = 'style' ]; then
+
+	# shellcheck disable=SC2046
+	shellcheck $(find -O3 "$TRAVIS_BUILD_DIR/.travis/" "$TRAVIS_BUILD_DIR/cmake/" -type f -name '*.sh' -o -name "*.sh.in")
+
+else
+
+	mkdir build
+	cd build
+
+	export CMAKE_FLAGS="-DWANT_QT5=$QT5 -DUSE_WERROR=ON -DCMAKE_BUILD_TYPE=RelWithDebInfo"
+
+	if [ -z "$TRAVIS_TAG" ]; then
+		export CMAKE_FLAGS="$CMAKE_FLAGS -DUSE_CCACHE=ON"
+	fi
+
+	"$TRAVIS_BUILD_DIR/.travis/$TRAVIS_OS_NAME.$TARGET_OS.script.sh"
+
+	make -j4
+
+	if [[ $TARGET_OS != win* ]]; then
+
+		make tests
+		tests/tests
+
+	fi
+fi