install.packages 不处理文件路径中的空格

问题描述

来自 this 的示例小插图的简单更改网站 说明了我的问题.

A simple change in the example vignette from this site illustrates my problem.

下面的代码将运行.没问题.因为网址中没有空格.

The code below will run. No problem. Because there is no whitespace in the url.

#miniCRAN example
library("miniCRAN")

# use Revolution Analytics CRAN mirror
revolution <- c(CRAN = "http://cran.microsoft.com")

# Specify list of packages to download
pkgs <- c("foreach")
pkgList <- pkgDep(pkgs, repos = revolution, type = "source", suggests = FALSE)
pkgList


# Create temporary folder for miniCRAN
dir.create(pth <- file.path("C:", "RTEMP", "miniCRAN"), recursive=TRUE)


# Make repo for source and win.binary
makeRepo(pkgList, path = pth, repos = revolution, type = c("source", "win.binary"))


# List all files in miniCRAN
list.files(pth, recursive = TRUE, full.names = FALSE)


#install packages from your local repository
install.packages(pkgs, repos = paste0("file:///", pth), type = "source")

但是如果我们更改以下行使其具有空格字符，那么它会在 install.packages 上失败.

But if we change the following line so it has a space character, then it will fail on install.packages.

# Create temporary folder for miniCRAN
dir.create(pth <- file.path("C:", "WHITE SPACE", "miniCRAN"), recursive=TRUE)

在我看来，第 p 个字符串被拆分了.除了更改文件系统中的文件夹名称之外，还有什么办法可以解决这个问题吗?我试图用%20"替换"，但这没有帮助.我在 Windows 系统上，顺便说一句.

Looks to me like the pth string gets split up. Is there any way around this, other than changing folder names in my filesystem? I tried to replace " " with "%20" but that did not help. I am on a Windows system, btw.

Warning: invalid package 'C:/WHITE'
Warning: invalid package 'SPACE/miniCRAN/src/contrib/foreach_1.4.4.tar.gz'
Error: ERROR: no packages specified

推荐答案

首先，我认为 file.path("C:", "WHITE SPACE", "miniCRAN") 不是有效路径，因为 C: 后面没有斜线.

Firstly, I think file.path("C:", "WHITE SPACE", "miniCRAN") is not valid path, because there's no slash after C:.

无论如何，要将install.packages 与包含空格的路径一起使用，请使用shortPathName:

Anyway, to use install.packages with a path containing white spaces, use shortPathName:

shortPathName(file.path("C:/", "WHITE SPACE", "miniCRAN"))

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