purl with output specified does not work if <documentName>.R exists

[dtenenba]

Say I have a document called test.Rnw. If I purl it and specify the output as "myoutput", it works. However...if I had not specified the output, it would have written to test.R. If test.R exists, purl will not work when I once again run it specifying output='myfile'. See below:

> library(knitr)
> cat("<<>>=\nls()\n@\n", file="test.Rnw")
> purl("test.Rnw", output="myoutput")


processing file: test.Rnw
  |.................................................................| 100%
output file: myoutput

[1] "myoutput"
> file.exists("myoutput")
[1] TRUE
> file.remove("myoutput")
[1] TRUE
> file.create("test.R")
[1] TRUE
> purl("test.Rnw", output="myoutput")
[1] "test.R"
> file.exists("myoutput")
[1] FALSE
> file.info("test.R")$size
[1] 0

Note that the second call to purl() returns "test.R", however, test.R is still empty after the code above has run. And myoutput does not exist.

> sessionInfo()
R Under development (unstable) (2015-02-08 r67773)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: OS X 10.9.5 (Mavericks)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] knitr_1.9

loaded via a namespace (and not attached):
[1] formatR_1.0    tools_3.2.0    stringr_0.6.2  evaluate_0.5.5

[yihui]

Should be fixed now. Thanks!

[dtenenba]

Thanks for the fix!

[github-actions]

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