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proj_line_ending <- function() {
# First look in .Rproj file
proj_path <- proj_path(paste0(project_name(), ".Rproj"))
if (file_exists(proj_path)) {
config <- read_utf8(proj_path)
if (any(grepl("^LineEndingConversion: Posix", config))) {
return("\n")
} else if (any(grepl("^LineEndingConversion: Windows", config))) {
return("\r\n")
}
}
# Then try DESCRIPTION
desc_path <- proj_path("DESCRIPTION")
if (file_exists(desc_path)) {
return(detect_line_ending(desc_path))
}
# Then try any .R file
r_path <- proj_path("R")
if (dir_exists(r_path)) {
r_files <- dir_ls(r_path, regexp = "[.][rR]$")
if (length(r_files) > 0) {
return(detect_line_ending(r_files[[1]]))
}
}
# Then give up - this is used (for example), when writing the
# first file into the package
platform_line_ending()
}
platform_line_ending <- function() {
if (.Platform$OS.type == "windows") "\r\n" else "\n"
}
detect_line_ending <- function(path) {
samp <- suppressWarnings(readChar(path, nchars = 500))
if (isTRUE(grepl("\r\n", samp))) "\r\n" else "\n"
}
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