/usr/bin/time brew update --verbose --debug --force
/usr/bin/time: cannot run brew: No such file or directory
Command exited with non-zero status 127
0.00user 0.00system 0:00.00elapsed ?%CPU (0avgtext+0avgdata 1320maxresident)k
0inputs+0outputs (0major+30minor)pagefaults 0swaps
The command "/usr/bin/time brew update --verbose --debug --force" failed and exited with 127 during .
You might need to add the ppa:git-core/ppa package repository.
Travis CI’s Xenial images contain the git package installed from this PPA, so it’s considerably newer than the git package in the standard Ubuntu package repositories. Nowadays these third-party apt-repositories are removed from the Xenial images (to reduce the risk of unrelated interference and faster ‘apt-get update’) [src], and the version of the git-email package coming from the standard Ubuntu package repositories doesn’t match the much more recent version of the git package installed from the PPA, resulting in this dependecy error.
For some reason I thought this was tagged on macOS. Good point, you may want to try and run add-apt-repository ppa:git-core/ppa # apt update; apt install git this will ensure you have the latest git packages so there are no package collisions.