R CMD检查查找不存在的文件

Question

R检查在准备用于延迟加载的包时查找不存在的.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Rcpp.package.skeleton来设置它。这会产生一个看似损坏的RcppExports.cpp文件(重复的函数定义)。

在手动更正该文件后，我运行devtools::check()，编译和链接成功，并生成dll。但是，下面是R CMD检查的输出

   ** 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

它为什么要查找"src/Env.R“文件？

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

提前感谢！

Answer 1

该代码中有许多错误：

1. 在函数声明和定义之前复制// [[Rcpp::export]]。这将导致编译RcppExports.cpp时出现重新定义错误。
2. 在某些文件中使用string而不是std::string或using std::string。
3. 不能将作为包的一部分的代码，例如compileCpp.R： 来源(“src/env.R”)库(Rcpp)

首先，R中的文件应该只包含函数定义。

Answer 2

您的回购/代码是错误的：

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$

包装纸太小了，不重要。您的代码是错误的-它不构建。注意警告和笔记。他们所有人。

编译器告诉我大量的重新定义。你在这里似乎有问题。尝试一些简单的开始，让它发挥作用，从那里建立起来。