It would add a 1GB+ download for every run, better cache it. This is inspired by the GitHub Action `vapier/coverity-scan-action`, however, it uses the finer-grained `restore`/`save` method to be able to cache the Coverity Build Tool even if an unrelated step in the GitHub workflow fails later on. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>