自动更新从R-锻造安装的软件包

Question

我最近从R-2.11.1安装了R-2.12.0，并通过以下方式更新了所有CRAN软件包：

update.packages(checkBuilt=TRUE, ask=FALSE)

现在，我想更新所有的软件包，我已经从R-锻造，但只有当他们没有在CRAN上可用。换句话说，我不能简单地跑：

update.packages(checkBuilt=TRUE, ask=FALSE, repos="http://r-forge.r-project.org")

因为它将在R-2.12.0附带的版本上安装survival包的R伪造版本。

我可能会使用来自old.packages和packageStatus的一些信息来确定哪些包只存在于R-forge上，但在构建自定义解决方案之前，我想问一问是否有更简单的方法。

Answer 1

这个怎么样：

# 1. Get the list of packages you have installed, 
#    use priority to exclude base and recommended packages.
#    that may have been distributed with R.
pkgList <- installed.packages(priority='NA')[,'Package']

# 2. Find out which packages are on CRAN and R-Forge.  Because
#    of R-Forge build capacity is currently limiting the number of
#    binaries available, it is queried for source packages only.
CRANpkgs <- available.packages(
  contriburl=contrib.url('http://cran.r-project.org'))[,'Package']
forgePkgs <- available.packages(
  contriburl=contrib.url('http://r-forge.r-project.org', type='source')
)[,'Package']

# 3. Calculate the set of packages which are installed on your machine,
#    not on CRAN but also present on R-Force.
pkgsToUp <- intersect(setdiff(pkgList, CRANpkgs), forgePkgs)

# 4. Update the packages, using oldPkgs to restrict the list considered.
update.packages(checkBuilt=TRUE, ask=FALSE,
  repos="http://r-forge.r-project.org",
  oldPkgs=pkgsToUp)

# 5. Profit?