R CMD 检查查找不存在的文件

Question

R CMD 检查在为延迟加载准备包时查找不存在的 .R 文件，Rcpp.package.skeleton 生成看似损坏的 RcppExports.cpp 文件。

我正在尝试使用 Rcpp 构建一个 R 包，通过调用来设置它 Rcpp.package.skeleton。这会产生一个看似损坏的 RcppExports.cpp 文件（重复函数定义）。

手动修正此文件后我运行 devtools::check() 在此，编译和链接成功并构建了dll。但随后 R CMD check

的以下输出

   ** R
   ** data
   ** byte-compile and prepare package for lazy loading
   Reading DataUtils.R
   Reading Env.R
   Reading Paths.R
   Reading RcppExports.R
   Reading StatUtils.R
   Reading SynData.R
   Warnung in file(filename, "r", encoding = encoding)
       cannot open file 'src/Env.R': No such file or directory
   Error in file(filename, "r", encoding = encoding) : 
       cannot open file connection
   Error : unable to load R code in package 'ZA'
   ERROR: lazy loading failed for package 'ZA'
   * removing 'C:/Users/MeyerM/Projects/R/ZA/ZA.Rcheck/ZA'
   In R CMD INSTALL

为什么要查找文件 "src/Env.R"？

包可以从https://github.com/spyqqqdia/ZAp获得（文件 ZAp.zip）。

提前致谢！

Answer 1

你的回购/代码有问题：

edd@rob:/tmp/so$ git clone git@github.com:spyqqqdia/ZAp.git
Cloning into 'ZAp'...
remote: Enumerating objects: 52, done.
remote: Counting objects: 100% (52/52), done.
remote: Compressing objects: 100% (49/49), done.
remote: Total 52 (delta 3), reused 52 (delta 3), pack-reused 0
Receiving objects: 100% (52/52), 31.78 KiB | 986.00 KiB/s, done.
Resolving deltas: 100% (3/3), done.
edd@rob:/tmp/so$ ls
ZAp
edd@rob:/tmp/so$ build.r ZAp                 # R CMD build wrapper
* checking for file ‘ZAp/DESCRIPTION’ ... OK
* preparing ‘ZAp’:
* checking DESCRIPTION meta-information ... OK
* cleaning src
* checking for LF line-endings in source and make files and shell scripts
* checking for empty or unneeded directories
* building ‘ZAp_1.0.tar.gz’

edd@rob:/tmp/so$ rcc.r ZAp_1.0.tar.gz        # R CMD check wrapper
── R CMD check ─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
─  using log directory ‘/tmp/file3d684dd243a4/ZAp.Rcheck’
─  using R version 3.5.2 (2018-12-20)
─  using platform: x86_64-pc-linux-gnu (64-bit)
─  using session charset: UTF-8
✔  checking for file ‘ZAp/DESCRIPTION’ ...
─  checking extension type ... Package
─  this is package ‘ZAp’ version ‘1.0’
✔  checking package namespace information
✔  checking package dependencies (519ms)
W  checking if this is a source package
   Subdirectory ‘src’ contains:
     PathGenerator.hpp matrix.hpp paths.hpp swap.hpp swapprogram.hpp
     utils.hpp
   These are unlikely file names for src files.
✔  checking if there is a namespace
✔  checking for executable files ...
✔  checking for hidden files and directories
✔  checking for portable file names
✔  checking for sufficient/correct file permissions
E  checking whether package ‘ZAp’ can be installed (5.1s)

   See
     ‘/tmp/file3d684dd243a4/ZAp.Rcheck/00check.log’
   for details.

   Installation failed.
   See ‘/tmp/file3d684dd243a4/ZAp.Rcheck/00install.out’ for details.
edd@rob:/tmp/so$

包装纸来自 littler，无关紧要。您的代码很糟糕——它无法构建。注意警告和注意事项。全部。

编译器告诉我无数次重新定义。你这里似乎有问题。一开始尝试一些更简单的东西，让它发挥作用，然后从那里开始。

Answer 2

该代码中有很多错误：

在函数声明和定义之前重复 // [[Rcpp::export]]。这导致编译 RcppExports.cpp.
在某些文件中使用 string 而不是 std::string 或 using std::string。
代码不能是包的一部分，例如compileCpp.R:
```
source("src/Env.R")
library(Rcpp)
```

作为第一个近似值，R 中的文件应该只包含函数定义。

R CMD 检查查找不存在的文件

R CMD check looks for nonexisting file

r

rcpp

building