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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| ################################################################################ | ||
| #' Check filepath. | ||
| #' | ||
| #' Checks the specified filepath for formatting consistencies, | ||
| #' such as trailing slashes, etc. | ||
| #' | ||
| #' @param path A character string corresponding to a filepath. | ||
| #' | ||
| #' @param create A logical indicating whether the path should | ||
| #' be created if it doesn't exist. Default is \code{FALSE}. | ||
| #' | ||
| #' @return Character string denoting the cleaned up filepath. | ||
| #' | ||
| #' @seealso \code{\link{file.exists}}, \code{\link{dir.create}}. | ||
| #' | ||
| #' @docType methods | ||
| #' @rdname checkPath | ||
| #' | ||
| setGeneric("checkPath", function(path, create) { | ||
| standardGeneric("checkPath") | ||
| }) | ||
|
|
||
| #' @rdname checkPath | ||
| setMethod("checkPath", | ||
| signature(path="character", create="logical"), | ||
| definition=function(path, create) { | ||
| if (length(path)!=1) { | ||
| stop("path must be a character vector of length 1.") | ||
| } else { | ||
| if (is.na(path)) { | ||
| stop("Invalid path: cannot be NA.") | ||
| } else { | ||
| path = normPath(path) | ||
|
|
||
| if (!file.exists(path)) { | ||
| if (create==TRUE) { | ||
| dir.create(file.path(path), recursive=TRUE, showWarnings=FALSE) | ||
| } else { | ||
| stop(paste("Specified path", path, "doesn't exist.", | ||
| "Create it and try again.")) | ||
| } | ||
| } | ||
| return(path) | ||
| } | ||
| } | ||
| }) | ||
|
|
||
| #' @rdname checkPath | ||
| setMethod("checkPath", | ||
| signature(path="character", create="missing"), | ||
| definition=function(path) { | ||
| return(checkPath(path, create=FALSE)) | ||
| }) | ||
|
|
||
| #' @rdname checkPath | ||
| setMethod("checkPath", | ||
| signature(path="NULL", create="ANY"), | ||
| definition=function(path) { | ||
| stop("Invalid path: cannot be NULL.") | ||
| }) | ||
|
|
||
| #' @rdname checkPath | ||
| setMethod("checkPath", | ||
| signature(path="missing", create="ANY"), | ||
| definition=function() { | ||
| stop("Invalid path: no path specified.") | ||
| }) | ||
|
|
||
| ################################################################################ | ||
| #' Normalize filepath. | ||
| #' | ||
| #' Checks the specified filepath for formatting consistencies: | ||
| #' 1) use slash instead of backslash; | ||
| #' 2) do tilde etc. expansion; | ||
| #' 3) remove trailing slash. | ||
| #' | ||
| #' @param path A character vector of filepaths. | ||
| #' | ||
| #' @return Character vector of cleaned up filepaths. | ||
| #' | ||
| #' @docType methods | ||
| #' @rdname normPath | ||
| #' @importFrom magrittr %>% | ||
| #' | ||
| setGeneric("normPath", function(path) { | ||
| standardGeneric("normPath") | ||
| }) | ||
|
|
||
| #' @rdname normPath | ||
| setMethod("normPath", | ||
| signature(path="character"), | ||
| definition=function(path) { | ||
| lapply(path, function(x) { | ||
| if (is.na(x)) { | ||
| NA_character_ | ||
| } else { | ||
| normalizePath(x, winslash="/", mustWork=FALSE) | ||
| } | ||
| }) %>% | ||
| unlist %>% | ||
| gsub("^[.]", paste0(getwd()), .) %>% | ||
| gsub("\\\\", "//", .) %>% | ||
| gsub("//", "/", .) %>% | ||
| gsub("/$", "", .) | ||
| }) | ||
|
|
||
| #' @rdname normPath | ||
| setMethod("normPath", | ||
| signature(path="list"), | ||
| definition=function(path) { | ||
| return(normPath(unlist(path))) | ||
| }) | ||
|
|
||
| #' @rdname normPath | ||
| setMethod("normPath", | ||
| signature(path="NULL"), | ||
| definition=function(path) { | ||
| return(character()) | ||
| }) | ||
|
|
||
| #' @rdname normPath | ||
| setMethod("normPath", | ||
| signature(path="missing"), | ||
| definition=function() { | ||
| return(character()) | ||
| }) |
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