grpc-go/scripts/common.sh

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#!/bin/bash
fail_on_output() {
tee /dev/stderr | not read
}
# not makes sure the command passed to it does not exit with a return code of 0.
not() {
# This is required instead of the earlier (! $COMMAND) because subshells and
# pipefail don't work the same on Darwin as in Linux.
! "$@"
}
# noret_grep will return 0 if zero or more lines were selected, and >1 if an
# error occurred. Suppresses grep's return code of 1 when there are no matches
# (for eg, empty file).
noret_grep() {
grep "$@" || [[ $? == 1 ]]
}
die() {
echo "$@" >&2
exit 1
}