Create an Emscripten filesystem image of an R package library

Extracts all binary R packages contained in the repository directory repo_dir and creates an Emscripten filesystem image containing the resulting package library.

Usage

make_vfs_library(
  out_dir = "./vfs",
  out_name = "library.data",
  repo_dir = "./repo",
  compress = FALSE,
  ...
)

Arguments

out_dir

Directory in which to write the output image files. Defaults to "./vfs".

out_name

A character string for the output library image filename.

repo_dir

The package repository directory. Defaults to "./repo".

compress

When TRUE, add and compress Emscripten virtual filesystem metadata in the resulting R package binary .tgz files. Otherwise, file_packager() is used to create uncompressed virtual filesystem images included in the output binary package repository. Defaults to TRUE.

...

Arguments passed on to make_library

strip

A character vector of directories to strip from each R package.

Details

A single filesystem image is generated using Emscripten's file_packager() tool and the output .data and .js.metadata filesystem image files are written to the directory out_dir.

When compress is TRUE, an additional file with extension ".data.gz" is also output containing a compressed version of the filesystem data.

The resulting image can be downloaded by webR and mounted on the Emscripten virtual filesystem as an efficient way to provide a pre-configured R library, without installing each R package individually.