deploy/rook/build/sed-in-place

#!/usr/bin/env bash
set -eEuo pipefail

# sed is NOT portable across OSes

# sed -i '' does in-place on Mac, BSD, and other POSIX-compliant OSes
# sed -i '' does not work with GNU sed, but sed -i (without small quotes) does

# assume that sed is not GNU sed initially
SED=(sed -i '')

if sed --help &>/dev/null; then
  # if sed doesn't have help text, it isn't GNU sed
  if [[ $(sed --help 2>&1) == *GNU* ]]; then
    SED=(sed -i)
  fi
fi

# sed -e is required on Mac/BSD if the -i option is used
# sed -e is not required but is supported by GNU sed
# Therefore, this script supplies -e it unless the first argument to this script is a flag
if [[ $1 != -* ]]; then
  SED+=(-e)
fi

"${SED[@]}" "${@}"