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Validate a file argument

Source: R/validate-args.R
dot-validate_file_arg.Rd

Internal helper used by generate_dockerfile() to check that optional file arguments (e.g. data_file, code_file, misc_file) are valid.

Usage

.validate_file_arg(arg_name, value)

Arguments

arg_name

Character string, the name of the argument being checked (used only in error messages).

value

A character path to a file, or NULL.

Value

A normalized file path if validation succeeds, or NULL if the input was NULL.