Replace coreutils by uutils-coreutils in fish shell script

uutils.fish

# Check that the uutils are available in the current search paths
if not command -sq uhostid
    echo "The uutils are not installed or not in the PATH variable. Adapt the script." >&2
    exit 1
end

# --- uutils-coreutils Aliasing ---

# Function to check if uutils command exists
function _uutils_command_exists
    set -l cmd $argv[1]
    if command -sq "u$cmd"
        return 0 # Command exists
    else
        return 1 # Command does not exist
    end
end

# Function to create an alias if the uutils version exists
function _create_uutils_alias
    set -l cmd $argv[1]
    if _uutils_command_exists $cmd
        # Create the alias.  Use command to avoid recursion.
        alias $cmd="command u$cmd" >&2
    else
        #echo "Warning: uutils command 'u$cmd' not found.  Skipping alias for '$cmd'." >&2
    end
end

# --- Aliases (Conditional) ---
# List of coreutils commands to consider.  Expand this as needed.
set -l uutils_commands = (ls (brew --prefix)/opt/uutils-coreutils/libexec/uubin)

# Create the aliases, checking for existence first.
for cmd in $uutils_commands
    # dot forget to avoid creating an alias for the test command
    if test (string length "$cmd") -gt 1; and test "$cmd" != test
        _create_uutils_alias $cmd
    end
end

# --- Helper function to easily disable/enable uutils aliases ---
function disable_uutils_aliases
    for cmd in $uutils_commands
        if functions -q $cmd; and string match -q 'command u*' (functions $cmd | string split ' ')[2]
            functions --erase $cmd
            echo "Disabled alias for: $cmd"
        end
    end
end

function enable_uutils_aliases
    for cmd in $uutils_commands
        _create_uutils_alias $cmd
    end
end