util/build-gnu.sh: Improve error message when missing GNU Coreutils repository #5019
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For a new contributor, the message given by
utils/build-gnu.sh
isfairly confusing - it starts with several lines of noise (showing
variables that are set in the script) followed by an error about missing
"GNU" and a
git
command string.This PR changes the script to explicitly instruct the user to run
the
git clone
command. Since the GNU coreutils repository is probablymissing for new developers, this error is shown if the repository is
missing without including any VARIABLE=value lines that are not actionable
yet.