R Under development (unstable) (2023-11-16 r85542 ucrt) -- "Unsuffered Consequences"
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> library("R.utils")
Loading required package: R.oo
Loading required package: R.methodsS3
R.methodsS3 v1.8.2 (2022-06-13 22:00:14 UTC) successfully loaded. See ?R.methodsS3 for help.
R.oo v1.25.0 (2022-06-12 02:20:02 UTC) successfully loaded. See ?R.oo for help.

Attaching package: 'R.oo'

The following object is masked from 'package:R.methodsS3':

    throw

The following objects are masked from 'package:methods':

    getClasses, getMethods

The following objects are masked from 'package:base':

    attach, detach, load, save

R.utils v2.12.3 successfully loaded. See ?R.utils for help.

Attaching package: 'R.utils'

The following object is masked from 'package:utils':

    timestamp

The following objects are masked from 'package:base':

    cat, commandArgs, getOption, isOpen, nullfile, parse, warnings

> 
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> # bzip2
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> cat(file="foo.txt", "Hello world!")
> print(isBzipped("foo.txt"))
[1] FALSE
> print(isBzipped("foo.txt.bz2"))
[1] TRUE
> 
> bzip2("foo.txt")
> print(file.info("foo.txt.bz2"))
            size isdir mode               mtime               ctime
foo.txt.bz2   51 FALSE  666 2023-11-17 08:48:12 2023-11-17 08:48:12
                          atime exe
foo.txt.bz2 2023-11-17 08:48:12  no
> print(isBzipped("foo.txt"))
[1] FALSE
> print(isBzipped("foo.txt.bz2"))
[1] TRUE
> 
> bunzip2("foo.txt.bz2")
> print(file.info("foo.txt"))
        size isdir mode               mtime               ctime
foo.txt   12 FALSE  666 2023-11-17 08:48:12 2023-11-17 08:48:12
                      atime exe
foo.txt 2023-11-17 08:48:12  no
> 
> 
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> # gzip
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> cat(file="foo.txt", "Hello world!")
> print(isGzipped("foo.txt"))
[1] FALSE
> print(isGzipped("foo.txt.gz"))
[1] TRUE
> 
> gzip("foo.txt")
> print(file.info("foo.txt.gz"))
           size isdir mode               mtime               ctime
foo.txt.gz   32 FALSE  666 2023-11-17 08:48:12 2023-11-17 08:48:12
                         atime exe
foo.txt.gz 2023-11-17 08:48:12  no
> print(isGzipped("foo.txt"))
[1] FALSE
> print(isGzipped("foo.txt.gz"))
[1] TRUE
> 
> gunzip("foo.txt.gz")
> print(file.info("foo.txt"))
        size isdir mode               mtime               ctime
foo.txt   12 FALSE  666 2023-11-17 08:48:12 2023-11-17 08:48:12
                      atime exe
foo.txt 2023-11-17 08:48:12  no
> 
> 
> 
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> # Skipping and overwriting
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> cat(file="foo.txt", "Hello world!")
> gzip("foo.txt", remove=FALSE)
> 
> res <- try(gzip("foo.txt", remove=FALSE, skip=FALSE), silent=TRUE)
> stopifnot(inherits(res, "try-error"))
> 
> gzip("foo.txt", remove=FALSE, overwrite=TRUE)
> gzip("foo.txt", remove=FALSE, skip=TRUE)
[1] "foo.txt.gz"
attr(,"temporary")
[1] FALSE
> res <- try(gzip("foo.txt", remove=FALSE, skip=FALSE), silent=TRUE)
> stopifnot(inherits(res, "try-error"))
> 
> gunzip("foo.txt.gz", remove=FALSE, overwrite=TRUE)
> res <- try(gunzip("foo.txt.gz", remove=FALSE, skip=FALSE), silent=TRUE)
> stopifnot(inherits(res, "try-error"))
> gunzip("foo.txt.gz", overwrite=TRUE)
> 
> 
> ## Cleanup
> file.remove("foo.txt")
[1] TRUE
> 
> proc.time()
   user  system elapsed 
   0.57    0.23    0.76