Method resolve

src/packagedcode/bashparse.py:226–295

Resolve each variables in a ``variables`` list of ShellVariable. Return a tuple of (list with updated variables, list of error messages). Do not report errors for variable with a name listed in the ``needed_variables`` set if provided.

(cls, variables, needed_variables=None)

    @classmethod
    def resolve(cls, variables, needed_variables=None):
        """
        Resolve each variables in a ``variables`` list of ShellVariable. Return
        a tuple of (list with updated variables, list of error messages). Do not
        report errors for variable with a name listed in the
        ``needed_variables`` set if provided.
        """

        def reportable(v):
            if needed_variables:
                return v.name in needed_variables
            return True

        # mapping of variables that we use for resolution
        # the mappings and values are updated as resolution progresses
        environment = {}
        errors = []
        for var in variables:

            if not environment:
                if reportable(var) and not var.is_resolved():
                    errors.append(f'Unresolvable first variable: {var}')

                if not var.is_array:
                    # we do not know how to expand an array
                    environment[var.name] = var.value
                continue

            if var.is_resolved():
                if not var.is_array:
                    # we do not know how to expand an array
                    environment[var.name] = var.value
                continue

            try:
                if var.is_array:
                    expanded = []
                    for item in var.value:
                        exp = pe.expand(item, env=environment)
                        if reportable(var) and ' ' in item and ' ' not in expanded:
                            errors.append(f'Expansion munged spaces in value: {item}')
                        expanded.append(exp)
                else:
                    expanded = pe.expand(var.value, env=environment)
                    if reportable(var) and ' ' in var.value and ' ' not in expanded:
                        errors.append(f'Expansion munged spaces in value: {var.value}')

                if TRACE:
                    logger_debug(
                        f'Resolved variable: {var} to: {expanded} '
                        f'with envt: {environment} '
                    )

                var.value = expanded

                if not var.is_array:
                    # we do not know how to expand an array
                    environment[var.name] = expanded