shelly-shell 0.5.3

A Rust based Unix style shell with a typed and structured language syntax.
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let $fixture = $args[0]
printf "%s" 'let export $ENV_LABEL = "module"; pub fn label(): String { optional_env "ENV_LABEL" "missing" }' -> "${fixture}/env_widget.shy"

check_repl ["id": "OPTIONAL-ENV", "exit": 0, "steps": [
    ['echo ((optional_env "ENV_LABEL") == ())', "output", "true"],
    ['let export $ENV_LABEL = "initial"; echo (optional_env "ENV_LABEL")', "output", "initial"],
    ['$ENV_LABEL = "live"; echo (optional_env "ENV_LABEL")', "output", "live"],
    ['fn local() { let export $ENV_LABEL = "local"; echo (optional_env "ENV_LABEL") }; local', "output", "local"],
    ['echo (optional_env "ENV_LABEL")', "output", "live"],
    ['optional_env "bad=name"', "error", "Environment names must be nonempty"],
    ['echo (optional_env "ENV_LABEL")', "output", "live"],
    ['import env_widget; $widgets = [`env_widget::label]; $prompt = \'env=${rendered_widgets}\\n\'', "output", "env=[live]"],
    ['$ENV_LABEL = "refreshed"', "output", "env=[refreshed]"],
    ['$ENV_LABEL = ""; echo ((optional_env "ENV_LABEL" "fallback") == "")', "output", "true"],
]]