Make use of the handy scripts for Travis as well.

.travis.yml

@@ -10,24 +10,12 @@ dist: trusty
 
 # We check out glslang and SPIRV-Tools at specific revisions to avoid test output mismatches
 env:
-  - GLSLANG_REV=9c6f8cc29ba303b43ccf36deea6bb38a304f9b92 SPIRV_TOOLS_REV=e28edd458b729da7bbfd51e375feb33103709e6f
+  - PROFILE=plain
 
 before_script:
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew upgrade python3; fi
-  - git clone https://github.com/KhronosGroup/glslang.git glslang
-  - git clone https://github.com/KhronosGroup/SPIRV-Tools SPIRV-Tools
-  - git clone https://github.com/KhronosGroup/SPIRV-Headers.git SPIRV-Tools/external/spirv-headers
+  - ./checkout_glslang_spirv_tools.sh
 
 script:
-  - git -C glslang checkout $GLSLANG_REV
-  - git -C SPIRV-Tools checkout $SPIRV_TOOLS_REV
-  - cd glslang && cmake . && make -j2 && cd ..
-  - cd SPIRV-Tools && cmake . && make -j2 && cd ..
   - make -j2
-  - PATH=./glslang/StandAlone:./SPIRV-Tools/tools:$PATH
-  - ./test_shaders.py shaders
-  - ./test_shaders.py --msl shaders-msl
-  - ./test_shaders.py --hlsl shaders-hlsl
-  - ./test_shaders.py shaders --opt
-  - ./test_shaders.py --msl shaders-msl --opt
-  - ./test_shaders.py --hlsl shaders-hlsl --opt
+  - ./test_shaders.sh