#! /usr/bin/env bash

# Helper function
is_sourced() {
    if [ -n "$ZSH_VERSION" ]; then 
        case $ZSH_EVAL_CONTEXT in *:file:*) return 0;; esac
    else  # Add additional POSIX-compatible shell names here, if needed.
        case ${0##*/} in dash|-dash|bash|-bash|ksh|-ksh|sh|-sh) return 0;; esac
    fi
    return 1; # NOT sourced.
}

BASE_0=${BASE_0:-$0}
BASE_SHELL=$(basename "$SHELL")

if is_sourced; then
    starship() {
        if [[ ! -x "$HOME/bin/starship" ]]; then
            curl -sS https://starship.rs/install.sh | FORCE=1 BIN_DIR="$HOME/bin" sh > /dev/null
        fi
        "$HOME/bin/starship" "${@}"
    }
    # shellcheck disable=SC1090 
    . <( starship init "$BASE_SHELL" ) 2> /dev/null

elif [[ "$1" == '-' ]]; then
    echo "BASE_0=${BASE_0}"
    cat "${0}"
else
    SCRIPT_NAME="$BASE_0"
    printf '%s\n' \
        "It seems $SCRIPT_NAME was invoked as a script. It should be sourced instead." \
	'The easiest way is to call it like this:' \
	"    $ . <( $SCRIPT_NAME - ) # Note the '-' after the script's name" \
        ''
fi