Cache is not pointing to existing one about renv

[kevinushey]

I've made a change to ensure the path suffix is consistent:

> renv_paths_cache()
[1] "~/Library/Application Support/renv/cache/R-3.5/v2"

> Sys.setenv(RENV_PATHS_CACHE = tempfile("renv-cache-"))
> renv_paths_cache()
[1] "/var/folders/qt/txb728ms5012wp_4yn369wth0000gn/T//RtmpVH36He/renv-cache-66933cb1f745/R-3.5/v2"

This does invalidate the old cache so old projects will need to be updated.

[cderv]

After using further the new version of renv and installing new package with renv::install, I have now a renv/cache and other at root directory (binary, and repos)

packageVersion("renv")
#> [1] '0.2.0.68'
renv:::renv_paths_cache()
#> [1] "C:\\Users\\chris\\AppData\\Local/renv/cache/R-3.5/v2"
renv:::renv_cache_list()
#> [1] "C:\\Users\\chris\\AppData\\Local/renv/cache/R-3.5/v2/brew/1.0-6/83a95e35c28b386681e1a05f29fae496/brew/DESCRIPTION"             
#> [2] "C:\\Users\\chris\\AppData\\Local/renv/cache/R-3.5/v2/data.table/1.12.0/6756128aea115cf6aa17db1eab6c51d9/data.table/DESCRIPTION"
library(magrittr)
fs::dir_ls(renv:::renv_paths_common(""))
#> C:/Users/chris/AppData/Local/renv/binary
#> C:/Users/chris/AppData/Local/renv/cache
#> C:/Users/chris/AppData/Local/renv/R-3.5
#> C:/Users/chris/AppData/Local/renv/repos
#> C:/Users/chris/AppData/Local/renv/source

^{Created on 2019-04-06 by the reprex package (v0.2.1.9000)}

I believe the old one is not useful anymore ?

[kevinushey]

Thanks -- this wasn't intentional and should be fixed up now.

> packageVersion("renv")
[1] ‘0.2.0.69’
> renv_paths_cache()
[1] "~/Library/Application Support/renv/R-3.5/cache/v2"
> Sys.setenv(RENV_PATHS_CACHE = "~/.renv-cache")
> renv_paths_cache()
[1] "~/.renv-cache/R-3.5/v2"

Note that the path format is slightly different when using an environment variable. This is just so that you can reuse the same cache variable across multiple versions of R. Does that make sense? Or should we just use the same path format in each case?

[cderv]

It make great sense to be able to reuse a cache environment variable across version. This path make sense "~/.renv-cache/R-3.5/v2" but we would expect the usual path to be "~/Library/Application Support/renv/cache/R-3.5/v2". 🤔

Currently We will have two different directory trees depending of use of environment variable or not...

• renv_path_root/R_version/cache_name/cache_ver
• renv_path_cache/R_version/cache_ver

Reading about env var I would have thought
RENV_PATH_CACHE ↔️ RENV_PATH_ROOT/CACHE_NAME

Is only cache directory sensitive to R version or also boostrap, repos and binary as it seems to be intended now ?