加载 gdata 包时如何修复 Perl 警告消息?

How to fix Perl warning message when loading gdata package?

我更新了 Strawberry Perl 64-bit 5.30.2001gdata 包。现在,在加载 library(gdata) 时,我总是收到似乎与 Perl 相关的警告消息。

suppressPackageStartupMessages(library(gdata))
# Warning messages:
#   1: In system(cmd, intern = intern, wait = wait | intern, show.output.on.console = wait,  :
#     running command 'C:\Windows\system32\cmd.exe /c ftype perl' had status 2
#   2: In system(cmd, intern = intern, wait = wait | intern, show.output.on.console = wait,  :
#     running command 'C:\Windows\system32\cmd.exe /c ftype perl' had status 2

不过read.xls,我需要的功能,好像运行不错,就是每次用的时候都会重复警告

read.xls("http://file-examples-com.github.io/uploads/2017/02/file_example_XLS_10.xls")
# trying URL 'http://file-examples-com.github.io/uploads/2017/02/file_example_XLS_10.xls'
# Content type 'application/vnd.ms-excel' length 8704 bytes
# downloaded 8704 bytes

#   X0 First.Name Last.Name Gender       Country Age       Date   Id
# 1  1      Dulce     Abril Female United States  32 15/10/2017 1562
# 2  2       Mara Hashimoto Female Great Britain  25 16/08/2016 1582
# 3  3     Philip      Gent   Male        France  36 21/05/2015 2587
# 4  4   Kathleen    Hanner Female United States  25 15/10/2017 3549
# 5  5    Nereida   Magwood Female United States  58 16/08/2016 2468
# 6  6     Gaston     Brumm   Male United States  24 21/05/2015 2554
# 7  7       Etta      Hurn Female Great Britain  56 15/10/2017 3598
# 8  8    Earlean    Melgar Female United States  27 16/08/2016 2456
# 9  9   Vincenza   Weiland Female United States  40 21/05/2015 6548
# Warning messages:
#   1: In system(cmd, intern = intern, wait = wait | intern, show.output.on.console = wait,  :
#     running command 'C:\Windows\system32\cmd.exe /c ftype perl' had status 2
#   2: In system(cmd, intern = intern, wait = wait | intern, show.output.on.console = wait,  :
#     running command 'C:\Windows\system32\cmd.exe /c ftype perl' had status 2

我不确定如何处理这个警告,因为它对我没有任何意义,我可能只是忽略它并用 suppressWarnings() 包围它。

不过,有人知道解决这个问题的方法吗?我无法通过谷歌搜索找到任何东西,也不知道从哪里开始,也不知道到底出了什么问题。

> sessionInfo()
R version 4.0.2 (2020-06-22)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1

Matrix products: default

locale:
[1] LC_COLLATE=English_United States.1252 
[2] LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

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

other attached packages:
[1] gdata_2.18.0

loaded via a namespace (and not attached):
[1] compiler_4.0.2 tools_4.0.2    gtools_3.8.2  

我在新安装的 R、gdata 和 Strawberry Perl 版本中遇到了同样的问题。我终于找到 this answer 一个不同的(但相关的)问题。根据那里的建议,我 运行 在 elevated 命令提示符上执行以下操作:

FTYPE perl=C:\Strawberry\perl\bin\perl.exe %1 %*

这为我解决了问题 – 但是:我不确定像这样设置 FTYPE 是否会产生任何不良副作用。所以要小心。


更新:上面的命令 确实 为我抑制了警告“ftype perl' had status 2”,但是 gdata 仍然有问题:

gdata: Unable to load perl libaries needed by read.xls() gdata: to support 'XLSX' (Excel 2007+) files.

gdata: Run the function 'installXLSXsupport()' gdata: to automatically download and install the perl gdata: libaries needed to support Excel XLS and XLSX formats.

但是,installXLSXsupport() 失败并出现了不明确的错误消息。

然后我运行

Sys.which("perl")
                              perl 
"C:\rtools40\usr\bin\perl.exe" 

并意识到来自 RTools 的 Perl 版本优先于我安装的 Strawberry Perl – 显然 gdata 不“喜欢”那个 Perl 版本。

因此,我决定通过更改 .Renviron 文件 (usethis::edit_r_environ()):

让 Strawberry Perl 优先于 RTools
PATH="${RTOOLS40_HOME}\usr\bin;${PATH}" # old
PATH="${PATH};${RTOOLS40_HOME}\usr\bin" # new

同样,我不完全确定 这个 可能有什么后果,但它为我解决了 gdata。 也许单独调整 PATH 也可以解决问题(没有我先做的 ftype 特技),但我不能再测试了。

我的推荐:

  1. 先调整PATH
  2. 如果 gdata 仍然抱怨 ftype,请设置 ftype