#1: add ccache environment variables

Author: tlamonthezie

.env

@@ -2,10 +2,17 @@
 CMAKE_CXX_STANDARD=17
 CMAKE_BUILD_TYPE=Release
 
+CCACHE_COMPILERCHECK=content
+CCACHE_COMPRESS=1
+CCACHE_COMPRESSLEVEL=5
+CCACHE_MAXSIZE=700M
+CCACHE_DIR=/opt/foo/build/ccache
+
 FOO_BUILD_DIR=/opt/foo/build
 FOO_OUTPUT_DIR=/opt/foo/output
 FOO_TESTS_ENABLED=ON
 FOO_RUN_TESTS=ON
+
 # Temporary: Turn off coverage reporting (requires lcov but not yet in DARMA/workflows setup requirements)
 FOO_COVERAGE_ENABLED=OFF
 FOO_COVERAGE_REPORT=/opt/foo/output/cov