Travis: add luajit-5.1

This refactors the env vars for the build matrix:

 - add LUANAME
 - drop LUALIB
 - add LUAINCLUDE for special luajit include dir.
 - add LUAROCKS_ARGS for luarocks' `configure --lua-suffix=jit-2.0.0-beta9`.

Closes https://github.com/awesomeWM/awesome/pull/484.

.travis.yml

@@ -2,15 +2,17 @@ language: c
 env:
   matrix:
     # Note: luarocks does not work with Lua 5.0.
-    # - LUA=5.0 LUAPKG=50  LUALIB=/usr/lib/liblua50.so
-    - LUA=5.1 LGIVER=      LUAPKG=5.1 LUALIB=/usr/lib/x86_64-linux-gnu/liblua5.1.so
-    - LUA=5.2 LGIVER=      LUAPKG=5.2 LUALIB=/usr/lib/x86_64-linux-gnu/liblua5.2.so BUILD_APIDOC=true
-    - LUA=5.2 LGIVER=0.7.1 LUAPKG=5.2 LUALIB=/usr/lib/x86_64-linux-gnu/liblua5.2.so
+    - LUA=5.1 LGIVER=      LUANAME=lua5.1
+    - LUA=5.2 LGIVER=      LUANAME=lua5.2 BUILD_APIDOC=true
+    - LUA=5.2 LGIVER=0.7.1 LUANAME=lua5.2
+    # luajit: requires --lua-suffix=jit-2.0.0-beta9 in Ubuntu precise.
+    # Later versions seem to provide a `luajit` symlink, so `jit` would be enough.
+    # See http://packages.ubuntu.com/precise/i386/luajit/filelist.
+    - LUA=5.1 LGIVER=      LUANAME=luajit-5.1 INSTALL_PKGS="luajit" LUAINCLUDE=/usr/include/luajit-2.0 LUAROCKS_ARGS=--lua-suffix=jit-2.0.0-beta9
   global:
     # Secure token to push to gh-pages.
     - secure: "LZxt9559+V3qJMdVgmKW4RYTt8ZINooex/qsnoEJUtZloj/eFNG4COT2z6a2yeH2tKWzknCsmV9nLPJiNEA2KLcyqDhjFQvJwKmsBuhGUmLyeQgfenjweorRjO8NT18X1SAEUXAMnClPu+OeTDs4BAuVn5foGZ7xpcRg2E+j2mc="
 
-
 before_install:
   - cmake --version
 
@@ -26,7 +28,7 @@ install:
   - sudo apt-get install libcairo2-dev xmlto asciidoc libpango1.0-dev gperf luadoc libxcb-xtest0-dev libxcb-icccm4-dev libxcb-randr0-dev libxcb-keysyms1-dev libxcb-xinerama0-dev libxcb-image0-dev libev-dev libimlib2-dev libdbus-1-dev libxdg-basedir-dev libstartup-notification0-dev imagemagick libxcb1-dev libxcb-shape0-dev libxcb-util0-dev libxcursor-dev libx11-xcb-dev
 
   # Install Lua (per env).
-  - sudo apt-get install liblua${LUAPKG}-dev lua${LUAPKG}
+  - sudo apt-get install lib${LUANAME}-dev ${LUANAME} ${INSTALL_PKGS}
 
   # For missing libxcb-cursor-dev.
   - sudo apt-get install -qq xutils-dev libxcb-render-util0-dev gperf
@@ -68,11 +70,13 @@ install:
   # - sudo apt-get install -qq lua-lgi
   - sudo apt-get install -qq gir1.2-pango-1.0
 
+  - if [ -z $LUAINCLUDE ]; then LUAINCLUDE=/usr/include/${LUANAME}; fi
+
   # Install luarocks (for the selected Lua version).
   - wget http://keplerproject.github.io/luarocks/releases/luarocks-2.2.2.tar.gz
   - tar xf luarocks-2.2.2.tar.gz
   - cd luarocks-2.2.2
-  - ./configure --lua-version=$LUA
+  - ./configure --lua-version=$LUA --with-lua-include=${LUAINCLUDE} ${LUAROCKS_ARGS}
   - make build
   - sudo make install
   - cd ..
@@ -100,7 +104,7 @@ install:
   - 'if [ "$TRAVIS_PULL_REQUEST" != false ]; then AWESOME_VERSION="${AWESOME_VERSION}-PR${TRAVIS_PULL_REQUEST}"; fi'
 
 script:
-  - export CMAKE_ARGS="-DLUA_LIBRARY=${LUALIB} -DLUA_INCLUDE_DIR=/usr/include/lua${LUAPKG} -D OVERRIDE_VERSION=$AWESOME_VERSION"
+  - export CMAKE_ARGS="-DLUA_LIBRARY=/usr/lib/x86_64-linux-gnu/lib${LUANAME}.so -DLUA_INCLUDE_DIR=${LUAINCLUDE} -D OVERRIDE_VERSION=$AWESOME_VERSION"
   - make && sudo env PATH=$PATH make install && awesome --version && tests/run.sh
 
 after_success: