Run unit tests in a separate build

.travis.yml

@@ -45,6 +45,12 @@ matrix:
       os: linux
       dist: focal
       if: branch != coverity_scan
+    - name: OpenMW (tests only) on Ubuntu Focal with GCC
+      os: linux
+      dist: focal
+      if: branch != coverity_scan
+      env:
+        - BUILD_TESTS_ONLY: 1
     - name: OpenMW (openmw) on Ubuntu Focal with Clang's Static Analysis
       os: linux
       dist: focal
@@ -73,7 +79,7 @@ script:
  - if [ "${COVERITY_SCAN_BRANCH}" != 1 ]; then ${ANALYZE} make -j3; fi
  - if [ "${COVERITY_SCAN_BRANCH}" != 1 ] && [ "${TRAVIS_OS_NAME}" = "osx" ]; then make package; fi
  - if [ "${COVERITY_SCAN_BRANCH}" != 1 ] && [ "${TRAVIS_OS_NAME}" = "osx" ]; then ../CI/check_package.osx.sh; fi
- - if [ "${COVERITY_SCAN_BRANCH}" != 1 ] && [ "${TRAVIS_OS_NAME}" = "linux" ]; then ./openmw_test_suite; fi
+ - if [ "${COVERITY_SCAN_BRANCH}" != 1 ] && [ "${TRAVIS_OS_NAME}" = "linux" ] && [ "${BUILD_TESTS_ONLY}" ]; then ./openmw_test_suite; fi
  - if [ "${COVERITY_SCAN_BRANCH}" != 1 ] && [ "${TRAVIS_OS_NAME}" = "linux" ]; then cd .. && ./CI/check_tabs.sh; fi
  - cd "${TRAVIS_BUILD_DIR}"
  - ccache -s

CI/before_script.linux.sh

@@ -2,22 +2,43 @@
 
 free -m
 
-env GENERATOR='Unix Makefiles' CONFIGURATION=Release CI/build_googletest.sh
-GOOGLETEST_DIR="$(pwd)/googletest/build"
+if [[ "${BUILD_TESTS_ONLY}" ]]; then
+    export GOOGLETEST_DIR="$(pwd)/googletest/build/install"
+    env GENERATOR='Unix Makefiles' CONFIGURATION=Release CI/build_googletest.sh
+fi
 
 mkdir build
 cd build
 
-${ANALYZE} cmake \
-    -DCMAKE_C_COMPILER="${CC}" \
-    -DCMAKE_CXX_COMPILER="${CXX}" \
-    -DCMAKE_C_COMPILER_LAUNCHER=ccache \
-    -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
-    -DBUILD_UNITTESTS=TRUE \
-    -DUSE_SYSTEM_TINYXML=TRUE \
-    -DCMAKE_INSTALL_PREFIX="/usr" \
-    -DBINDIR="/usr/games" \
-    -DCMAKE_BUILD_TYPE="DEBUG" \
-    -DGTEST_ROOT="${GOOGLETEST_DIR}" \
-    -DGMOCK_ROOT="${GOOGLETEST_DIR}" \
-    ..
+if [[ "${BUILD_TESTS_ONLY}" ]]; then
+    ${ANALYZE} cmake \
+        -D CMAKE_C_COMPILER="${CC}" \
+        -D CMAKE_CXX_COMPILER="${CXX}" \
+        -D CMAKE_C_COMPILER_LAUNCHER=ccache \
+        -D CMAKE_CXX_COMPILER_LAUNCHER=ccache \
+        -D CMAKE_INSTALL_PREFIX=install \
+        -D CMAKE_BUILD_TYPE=RelWithDebInfo \
+        -D USE_SYSTEM_TINYXML=TRUE \
+        -D BUILD_OPENMW=OFF \
+        -D BUILD_BSATOOL=OFF \
+        -D BUILD_ESMTOOL=OFF \
+        -D BUILD_LAUNCHER=OFF \
+        -D BUILD_MWINIIMPORTER=OFF \
+        -D BUILD_ESSIMPORTER=OFF \
+        -D BUILD_OPENCS=OFF \
+        -D BUILD_WIZARD=OFF \
+        -D BUILD_UNITTESTS=ON \
+        -D GTEST_ROOT="${GOOGLETEST_DIR}" \
+        -D GMOCK_ROOT="${GOOGLETEST_DIR}" \
+        ..
+else
+    ${ANALYZE} cmake \
+        -D CMAKE_C_COMPILER="${CC}" \
+        -D CMAKE_CXX_COMPILER="${CXX}" \
+        -D CMAKE_C_COMPILER_LAUNCHER=ccache \
+        -D CMAKE_CXX_COMPILER_LAUNCHER=ccache \
+        -D USE_SYSTEM_TINYXML=TRUE \
+        -D CMAKE_INSTALL_PREFIX=install \
+        -D CMAKE_BUILD_TYPE=Debug \
+        ..
+fi

CI/build_googletest.sh

@@ -1,13 +1,17 @@
-#!/bin/sh -e
+#!/bin/sh -ex
 
 git clone -b release-1.10.0 https://github.com/google/googletest.git
 cd googletest
 mkdir build
 cd build
 cmake \
+    -D CMAKE_C_COMPILER="${CC}" \
+    -D CMAKE_CXX_COMPILER="${CXX}" \
+    -D CMAKE_C_COMPILER_LAUNCHER=ccache \
+    -D CMAKE_CXX_COMPILER_LAUNCHER=ccache \
     -D CMAKE_BUILD_TYPE="${CONFIGURATION}" \
-    -D CMAKE_INSTALL_PREFIX=. \
+    -D CMAKE_INSTALL_PREFIX="${GOOGLETEST_DIR}" \
     -G "${GENERATOR}" \
     ..
-cmake --build . --config "${CONFIGURATION}"
-cmake --build . --target install --config "${CONFIGURATION}"
+cmake --build . --config "${CONFIGURATION}" -- -j $(nproc)
+cmake --install . --config "${CONFIGURATION}"