Find the installation directory for the basilisk-managed Conda instance.
Logical scalar indicating whether basilisk is already installed.
By default, conda is installed to a location specified by
This ensures that R package build systems do not attempt to generate binaries that include the conda instance;
such binaries are not relocatable due to the presence of hard-coded paths, resulting in run-time failures.
BASILISK_EXTERNAL_CONDA environment variable is set to a path to an existing conda instance,
the function will return it directly without modification.
This allows users to use their own conda instances with basilisk but,
in turn, they are responsible for managing it.
BASILISK_USE_SYSTEM_DIR environment variable is set to
the function will return a path to a location inside the
basilisk system installation directory.
This is the ideal approach when installing from source as any conda and basilisk re-installations are synchronized.
It also ensures that any R process that can load basilisk will also have permissions to access the conda instance,
which makes life easier for sysadmins of clusters or other shared resources.
We suggest always calling this function after an
which guarantees the presence of the conda installation directory (or dies trying).
installed=FALSE should only happen inside the basilisk
String containing the path to the conda instance.
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