Github actions for CI in the key4hep stack
This action builds the Key4hep stack on the supported OSes for both the stable
releases and the nightlies. After that, it runs the available tests using
ctest. It also runs during the night every day to populate a cache (using
ccache) that is later used by the action (for example, in pull requests) so
that building will be faster if they files that are built haven't changed. For
example, for a simple change in a README file the builds will be very fast since
all the files are cached, but the workflow may take longer because of the tests.
This action does two things:
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Builds packages downstream to check that the changes that were made do not break the packages that depend on the one that was changed
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Builds packages that have been changed at the same time. For this to work there has to be a PR for each package. Then, in one of the pull request there has to be anywhere in the text a mention to all the PRs that we want to build together. This mention will look like this:
PR text, explanation, release notes, etc Depends on URL_OF_PR_1, URL_OF_PR_2There is some flexibility to try to catch possible edge cases: the urls don't need to be in the same line, they can be comma separated or space separated or and-separated.