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79 lines
2.2 KiB
79 lines
2.2 KiB
9 years ago
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#' Count lines of code, comments and whitespace in source files/archives
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#'
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#' @param source thing to extract from
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#' @param extract_with thing
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#' @return \code{tbl_df}
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#' @export
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cloc <- function(source, extract_with=NULL) {
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is_url <- isUrl(source)
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if (is_url) {
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dir <- tempdir()
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download.file(source, file.path(dir, basename(source)), method="curl")
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source <- file.path(dir, basename(source))
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}
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stopifnot(file.exists(source))
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cmd <- sprintf("perl %s --quiet --csv %s",
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system.file("bin/cloc.pl", package="cloc"),
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source)
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if (!is.null(extract_with)) cmd <- sprintf('%s --extract-with="%s"', cmd, extract_with)
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dat <- system(cmd, intern=TRUE)
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fil <- read.table(text=paste(tail(dat, -2), sep="", collapse="\n"),
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col.names=c("file_count", "language", "blank_lines",
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"comment_lines", "loc"),
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sep=",", stringsAsFactors=FALSE)
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if (is_url) unlink(source)
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# calculate percentages
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fil$source <- basename(source)
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fil$file_count_pct <- fil$file_count / sum(fil$file_count)
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fil$blank_line_pct <- fil$blank_lines / sum(fil$blank_lines)
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fil$comment_line_pct <- fil$comment_lines / sum(fil$comment_lines)
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fil$loc_pct <- fil$loc / sum(fil$loc)
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tbl_df(fil[, c("source", "language",
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"file_count", "file_count_pct",
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"loc", "loc_pct",
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"blank_lines", "blank_line_pct",
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"comment_lines", "comment_line_pct")])
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}
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#' Count lines of code (etc) from source packages on CRAN
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#'
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#' @param pkgs names of pkgs
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#' @param repos repos
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#' @param contriburl
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#' @return \code{tbl_df}
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#' @export
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cloc_cran <- function(pkgs,
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repos = getOption("repos"),
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contriburl = contrib.url(repos, "source")) {
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destdir <- tempfile()
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dir.create(destdir)
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res_p <- as.data.frame(download.packages(pkgs, destdir, repos=repos,
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contriburl=contriburl, type="source"),
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stringsAsFactors=FALSE)
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res <- bind_rows(pblapply(res_p$V2, function(x) {
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ret <- cloc(x)
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ret$pkg <- res_p[res_p$V2==x,]$V1
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ret
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}))
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unlink(destdir, recursive=TRUE)
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res
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}
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