[R-pkg-devel] finding "logo.jpg" [was: "try" malfunctions on Ubuntu Linux 16.04 LTS, R-release, GCC]

[Ben Bolker]

  Maybe include your own version of logo.jpg in inst/ ?

On 2020-02-03 2:30 p.m., Spencer Graves wrote:
>       Thanks to Iñaki Ucar for identifying a second error that explained
> why I still got an error after wrapping one in "try".
> 
> 
>       That still leaves a question of how to find a file like "logo.jpg"
> in a platform independant way.
> 
> 
>       The following had worked for several years and now broke on rhub
> "Ubuntu Linux 16.04 LTS, R-release, GCC" but not on several other
> computers I tried:
> 
> 
>             logo.jpg <- paste(R.home(), "doc", "html", "logo.jpg", sep =
> .Platform$file.sep)
> 
> 
>       On that Ubuntu platform, "readJPEG(logo.jpg)" stopped with "Error
> in readJPEG(logo.jpg) : unable to open /usr/lib/R/doc/html/logo.jpg".
> 
> 
>       I replaced the above "paste" with the following:
> 
> 
> RdocDir <- dir(R.home(), pattern='^doc$', full.names = TRUE)
> RhtmlDir <- dir(RdocDir, pattern='^html$', full.names=TRUE)
> JPGs <- dir(RhtmlDir, pattern='\\\\.jpg$', full.names=TRUE)
> if(length(JPGs)>1){
>   logoJPG <- paste0(.Platform$file.sep, 'logo.jpg$')
>   logo.jpg <- grep(logoJPG, JPGs, value=TRUE)
>   if(length(logo.jpg)>1)logo.jpg <- logo.jpg[1]
>   if(length(logo.jpg)<1)logo.jpg <- JPGs[1]
> } else logo.jpg <- JPGs
> if(length(logo.jpg)<1){
>   cat('logo.jpg not found.\n')
>   print(R.home())
>   print(dir(RdocDir))
>   print(dir(RhtmlDir))
>   if(!fda::CRAN())stop('logo.jpg not found')
> } else {
> # length(logo.jpg)==1 so continue:
>   if(require(jpeg)){
> ##
> ## 1.  Shrink as required
> ##
>     Rlogo <- readJPEG(logo.jpg)
> 
> ...
> 
> 
>       This gave me no error message, which I believe means that either
> length(logo.jpg) == 1 or fda::CRAN() returns TRUE.  Sadly, I could not
> find the standard test file to see which of these is the case.
> 
> 
>       I should proceed to submit the current Ecfun package to CRAN. Then
> I might modify this test sequence to force an error, so I can see more
> what is happening.
> 
> 
>       Suggestions?
>       Thanks,
>       Spencer
> 
> 
> On 2020-02-03 03:06, Iñaki Ucar wrote:
>> On Mon, 3 Feb 2020 at 03:16, Spencer Graves
>> <spencer.graves using effectivedefense.org> wrote:
>>> Hello, All:
>>>
>>>
>>>         devtools::check_rhub failed to trap an error wrapped in "try",
>>> per the email below.  This came from running
>>> devtools::check_rhub(Ecfun_dir), where Ecfun_dir = the path to a copy of
>>> "https://github.com/sbgraves237/Ecfun".
>> That's improbable.
>>
>>>         This is the development version of Ecfun, which I want to submit
>>> to CRAN as soon as I can do so without offending the sensibilities of
>>> the overworked CRAN maintainers.
>>>
>>>
>>>         Suggestions?
>>>         Thanks,
>>>         Spencer Graves
>>>
>>>
>>> -------- Forwarded Message --------
>>> Subject:        Ecfun 0.2-2: ERROR
>>> Date:   Sun, 02 Feb 2020 23:27:10 +0000
>>> From:   R-hub builder <support using rhub.io>
>>> To:     spencer.graves using effectivedefense.org
>>>
>> <snip>
>>
>>>> ## 2.9.  A more complicated example with elements to eval
>>>> ##
>>>> logo.jpg <- paste(R.home(), "doc", "html", "logo.jpg",
>>> +                   sep = .Platform$file.sep)
>>>> if(require(jpeg)){
>>> +   Rlogo <- try(readJPEG(logo.jpg))
>>> +   if(!inherits(Rlogo, 'try-error')){
>>> + # argument list for a call to rasterImage or rasterImageAdj
>>> +     RlogoLoc <- list(image=Rlogo,
>>> +       xleft.0 = c(NZ=176.5,CH=172,US=171,
>>> +                   CN=177,RU= 9.5,UK= 8),
>>> +       xleft.1 = c(NZ=176.5,CH=  9,US=-73.5,
>>> +                   CN=125,RU= 37, UK= 2),
>>> +       ybottom.0=c(NZ=-37,  CH=-34,US=-34,
>>> +                   CN=-33,RU= 48, UK=47),
>>> +       ybottom.1=c(NZ=-37,  CH= 47,US= 46,
>>> +                   CN= 32,RU=55.6,UK=55),
>>> +       xright=quote(xleft+xinch(0.6)),
>>> +       ytop = quote(ybottom+yinch(0.6)),
>>> +       angle.0 =0,
>>> +       angle.1 =c(NZ=0,CH=3*360,US=5*360,
>>> +                  CN=2*360,RU=360,UK=360)
>>> +     )
>>> +
>>> +     RlogoInterp <- interpPairs(RlogoLoc,
>>> +             .proportion=rep(c(0, -1), c(2, 4)) )
>>> + # check
>>> + ## Don't show:
>>> + stopifnot(
>>> + ## End(Don't show)
>>> + all.equal(names(RlogoInterp),
>>> +    c('image', 'xright', 'ytop', 'xleft', 'ybottom', 'angle'))
>>> + ## Don't show:
>>> + )
>>> + ## End(Don't show)
>>> + }
>>> + # NOTE:  'xleft', and 'ybottom' were created in interpPairs,
>>> + # and therefore come after 'xright' and 'ytop', which were
>>> + # already there.
>>> +
>>> + ##
>>> + ## 2.10.  using envir
>>> + ##
>>> +   RlogoDiag <- list(x0=quote(Rlogo.$xleft),
>>> +                   y0=quote(Rlogo.$ybottom),
>>> +                   x1=quote(Rlogo.$xright),
>>> +                   y1=quote(Rlogo.$ytop) )
>>> +
>>> +   RlogoD <- interpPairs(RlogoDiag, .p=1,
>>> +                     envir=list(Rlogo.=RlogoInterp) )
>>> + ## Don't show:
>>> + stopifnot(
>>> + ## End(Don't show)
>>> + all.equal(RlogoD, RlogoDiag)
>>> + ## Don't show:
>>> + )
>>> + ## End(Don't show)
>>> + }
>>> Loading required package: jpeg
>>> Error in readJPEG(logo.jpg) : unable to open
>>> /usr/lib/R/doc/html/logo.jpg
>>> Error in interpPairs.list(RlogoDiag, .p = 1, envir = list(Rlogo. =
>>> RlogoInterp)) :
>>>     object 'RlogoInterp' not found
>>> Calls: interpPairs -> interpPairs.list
>>> Execution halted
>> There it is: "Error in interpPairs.list [...] 'RlogoInterp' not
>> found". That's the error, not the "try". You see the error message
>> because you didn't specify "quiet=TRUE", but that doesn't mean that R
>> is failing to catch the error. So the second error is the one that
>> fails.
>>
>> Iñaki
> 
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