Travis: ensure the requested language version is being tested

The various Python versions were not being tested

.travis.yml

@@ -188,7 +188,7 @@ install:
   - $CXX --version
 script:
   - echo 'Configuring...' && echo -en 'travis_fold:start:script.1\\r'
-  - if test -n "$SWIGLANG"; then CONFIGOPTS+=(--without-alllang --with-$SWIGLANG$PY3); fi
+  - if test -n "$SWIGLANG"; then CONFIGOPTS+=(--without-alllang --with-$WITHLANG); fi
   - echo "${CONFIGOPTS[@]}"
   - ./autogen.sh && mkdir -p build/build && cd build/build && ../../configure "${CONFIGOPTS[@]}"
   - echo -en 'travis_fold:end:script.1\\r'

Tools/travis-linux-install.sh

@@ -11,6 +11,8 @@ else
 	sudo apt-get -qq install libboost-dev
 fi
 
+WITHLANG=$SWIGLANG
+
 case "$SWIGLANG" in
 	"")     ;;
 	"csharp")
@@ -75,11 +77,12 @@ case "$SWIGLANG" in
 		if [[ "$PY3" ]]; then
 			sudo apt-get install -qq python3-dev
 		fi
+		WITHLANG=$SWIGLANG$PY3
 		if [[ "$VER" ]]; then
 			sudo add-apt-repository -y ppa:fkrull/deadsnakes
 			sudo apt-get -qq update
 			sudo apt-get -qq install python${VER}-dev
-			CONFIGOPTS+=("--with-python${PY3}=python${VER}");
+			WITHLANG=$SWIGLANG$PY3=$SWIGLANG$VER
 		fi
 		;;
 	"r")
@@ -87,11 +90,11 @@ case "$SWIGLANG" in
 		;;
 	"ruby")
 		if [[ "$VER" ]]; then
-			sudo apt-get install python-software-properties
+			sudo apt-get -qq install python-software-properties
 			sudo add-apt-repository -y ppa:brightbox/ruby-ng
 			sudo apt-get -qq update
 			sudo apt-get -qq install ruby2.3 ruby2.3-dev
-			CONFIGOPTS+=("--with-ruby=ruby${VER}");
+			WITHLANG=$SWIGLANG=$SWIGLANG$VER
 		fi
 		;;
 	"scilab")

Tools/travis-osx-install.sh

@@ -4,6 +4,9 @@ brew update
 brew list
 brew install pcre
 # brew install boost
+
+WITHLANG=$SWIGLANG
+
 case "$SWIGLANG" in
 	"csharp")
 		brew install https://s3.amazonaws.com/travisbuilds.swig.org/mono.rb
@@ -15,6 +18,7 @@ case "$SWIGLANG" in
 		brew install lua
 		;;
 	"python")
+		WITHLANG=$SWIGLANG$PY3
 		if [[ "$PY3" ]]; then
 			brew install python3
 			brew list -v python3