Hi, Rob and Pádraig, > So yes the use case is only for copy & paste, which is of limited use.
Agreed. > URL="https://raw.githubusercontent.com/coreutils/coreutils/3f144241/DEMO-20241216"; > SHA=e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 > SUM=sha256sum; $SUM /dev/null > /dev/null 2>&1 || SUM='shasum -a 256' > tmpf=$(mktemp) && curl -fs "$URL" > "$tmpf" && $SUM --status --check \ > <(printf '%s -' "$SHA") < "$tmpf" && sh "$tmpf"; rm "$tmpf" This pattern is too complex and never used in the wild. Lots of software developers want to appeal that their software can be installed in a single line without the $<>()&&| symbols. Better or worse, we have to admit the existence of such one-liners, and provide a practical workaround that they can be convinced to use. Examples of one-liners in the wild: * https://brew.sh > `/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"` * https://www.rust-lang.org/tools/install > `curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh` * https://k3s.io > `curl -sfL https://get.k3s.io | sh -` * https://docs.tigera.io/calico/latest/getting-started/kubernetes/quickstart#install-calico > `kubectl create -f https://raw.githubusercontent.com/projectcalico/calico/v3.29.1/manifests/tigera-operator.yaml` (This pattern is Kubernetes's equivalent of `curl https://... | sh`) * https://cert-manager.io/docs/installation/kubectl/ > `kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.16.2/cert-manager.yaml` * And more: https://github.com/search?q=%22curl%22+%22%7C+sh%22+OR+%22%7C+sudo+sh%22&type=code https://github.com/search?q=%22kubectl+apply+-f+https%3A%2F%2F%22&type=code > Yes it's more concise, but also much less portable. > The first example above should run on any Linux, FreeBSD/macOS system. FreeBSD (since 14) and macOS (since 15) began to provide GNU-compatible sha*sum commands: https://man.freebsd.org/cgi/man.cgi?query=sha256sum&apropos=0&sektion=0&manpath=FreeBSD+14.0-RELEASE&arch=default&format=html So I'm sure that my proposal will be supported in FreeBSD and macOS too if it can be accepted in GNU coreutils. Regards, Akihiro Suda
