36 lines
1.0 KiB
R
36 lines
1.0 KiB
R
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#' Parses script arguments.
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#'
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#' @param defaults list of default parameters. Names of the provided defaults
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#' define the allowed parameters.
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#' @param args Arguments to parge, if missing the Rscript params are taken.
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#'
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#' @return calling script arguments of `Rscript`
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#'
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#' @export
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parse.args <- function(defaults, args) {
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if (missing(args))
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args <- commandArgs(trailingOnly = TRUE)
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if (length((args)) == 0)
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return(defaults)
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args <- strsplit(sub('--', '', args, fixed = TRUE), '=')
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values <- Map(`[`, args, 2)
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names(values) <- unlist(Map(`[`, args, 1))
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if (!all(names(values) %in% names(defaults)))
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stop('Found unknown script parameter')
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for (i in seq_along(defaults)) {
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name <- names(defaults)[i]
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if (name %in% names(values)) {
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value <- unlist(strsplit(values[[name]], ',', fixed = TRUE))
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value <- eval(call(paste0('as.', typeof(defaults[[name]])), value))
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defaults[[name]] <- value
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}
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}
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defaults
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}
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