| # File src/library/base/R/utils.R |
| # Part of the R package, https://www.R-project.org |
| # |
| # Copyright (C) 1995-2015 The R Core Team |
| # |
| # This program is free software; you can redistribute it 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 program 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. |
| # |
| # A copy of the GNU General Public License is available at |
| # https://www.R-project.org/Licenses/ |
| |
| shQuote <- function(string, type = c("sh", "csh", "cmd", "cmd2")) |
| { |
| cshquote <- function(x) { |
| xx <- strsplit(x, "'", fixed = TRUE)[[1L]] |
| paste(paste0("'", xx, "'"), collapse="\"'\"") |
| } |
| if(missing(type) && .Platform$OS.type == "windows") type <- "cmd" |
| type <- match.arg(type) |
| if(type == "cmd") |
| paste0('"', gsub('"', '\\\\"', string), '"') |
| else if (type == "cmd2") |
| gsub('([()%!^"<>&|])', "^\\1", string) |
| else if(!length(string)) |
| "" |
| else if(!any(grepl("'", string))) # has single quote |
| paste0("'", string, "'") |
| else if(type == "sh") |
| paste0('"', gsub('(["$`\\])', "\\\\\\1", string), '"') |
| else if(!any(grepl("([$`])", string))) |
| paste0('"', gsub('(["!\\])' , "\\\\\\1", string), '"') |
| else |
| vapply(string, cshquote, "") |
| } |
| |
| .standard_regexps <- |
| function() |
| { |
| list(valid_package_name = "[[:alpha:]][[:alnum:].]*[[:alnum:]]", |
| valid_package_version = "([[:digit:]]+[.-]){1,}[[:digit:]]+", |
| valid_R_system_version = |
| "[[:digit:]]+\\.[[:digit:]]+\\.[[:digit:]]+", |
| valid_numeric_version = "([[:digit:]]+[.-])*[[:digit:]]+") |
| } |