en-GB
commented
2 years ago Apparently the problem is that macOS uses bsd sed by default while pretty much everyone else uses gnu sed. Since not all windows shells set $OS to windows_nt i changed it to assume GNU sed everywhere except on macOS. This is probably good enough but maybe it would be better to grep on sed --version
Alternatively we could set it to always make a new file and then delete it afterwards, which should be portable.
no. i misread how -i works. this one should hopefully work everywhere.