Pretty much as it says on the tin. Provides an image that allows for easy building of the scran.js package, where we have already set up the CMake directories and performed initial compilation of all C++ files to Wasm. This saves time during CI runs as we only have to recompile the files that changed.
Note that Node.js is pre-installed in this image as part of the Emscripten SDK but has been removed from the $PATH.
This is deliberate as it allows CI jobs to define a different Node.js version without having to worry about conflicts.
Developers wishing to use the pre-installed Node.js commands should run the following before working with scran.js code:
NODEBIN=$(echo /emsdk/node/*/bin)
export PATH="${NODEBIN}:${PATH}"The /scran.js/ directory contains a copy of the scran.js repository, along with a build/ subdirectory containing an initial CMake build.