external-sources=true # allow shellcheck to read external sources
disable=SC3043 #disable SC3043: In POSIX sh, local is undefined.
enable=useless-use-of-cat # disabled by default as of shellcheck 0.11.0
enable=avoid-negated-conditions # avoid-negated-conditions is optional as of shellcheck 0.11.0
enable=require-variable-braces
enable=deprecate-which