shell script to parse user@host:port into its constituent parts, with defaults.

gistfile1.txt

# Parse user@host:port into its constituent parts, with defaults.


# Explode if there are errors:
set -eu

# The parser with defaults:
parse() {
        target="$1"
        hostport="${1#*@}"
        host="${hostport%:*}"
        port="${hostport#${host}}"
        port="${port#:}"
        user="${target%$hostport}"
        user="${user%@}"
        echo "${user:-lala}" "${host:-dipsy}" "${port:-60}"
}

# Tests:
parsed() {
        printf "% -30s parsed is " "$1"
        set $(parse "$1")
        printf "'${1:-}' '${2:-}' '${3:-}'\n"
}

parsed "root@dangermouse.com:50"
parsed "dangermouse.com:50"
parsed "root@dangermouse.com"
parsed "dangermouse.com"