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#!/usr/bin/env Rscript
# Copyright 2012-2013 Trevor L Davis <trevor.l.davis@gmail.com>
#
# This file is free software: you may copy, redistribute and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation, either version 2 of the License, or (at your
# option) any later version.
#
# This file is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
suppressPackageStartupMessages(library("argparse"))
parser <- ArgumentParser()
parser$add_argument(
"-n",
"--add_numbers",
action = "store_true",
default = FALSE,
help = "Print line number at the beginning of each line [default]"
)
parser$add_argument("file", nargs = 1, help = "File to be displayed")
args <- parser$parse_args()
file <- args$file
if (file.access(file) == -1) {
stop(sprintf("Specified file ( %s ) does not exist", file))
} else {
file_text <- readLines(file)
}
if (args$add_numbers) {
cat(paste(seq_along(file_text), file_text), sep = "\n")
} else {
cat(file_text, sep = "\n")
}
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