This folder contains bash scripts used by the Travis CI build (.travis.yml in the root of the repo).

The GA Travis build is a matrix build, meaning it combines the selected OS, compilers, and environment variables to create a set of builds run on each commit.

As of October 30, 2018 this means that there are 42 builds run for each commit (2 OS x 2 compilers x 10 env settings + 2 xcode installs on MacOS).

For each combination of the matrix build, the before_install followed by the install scripts are run. These get the required dependencies for the build installed and ready to use. Then the script section is run, followed by after_failure in the event the build fails.

Within the script section, the build-run.sh file is executed that includes running the appropriate test suite depending on the language. E.g., test.x for Fortran or testc.x for C.

See https://docs.travis-ci.com/user/tutorial/ for more information on creating Travis CI builds.