writeFuture {reproducible}

Write to cache repository, using future::future

Description

This will be used internally if options("reproducible.futurePlan" = TRUE). This is still experimental.

Usage

writeFuture(
  written,
  outputToSave,
  cachePath,
  userTags,
  drv = getDrv(getOption("reproducible.drv", NULL)),
  conn = getOption("reproducible.conn", NULL),
  cacheId,
  linkToCacheId = NULL
)

Arguments

written

Integer. If zero or positive then it needs to be written still. Should be 0 to start.

outputToSave

The R object to save to repository

cachePath

The file path of the repository

userTags

Character string of tags to attach to this outputToSave in the CacheRepo

drv

if using a database backend, drv must be an object that inherits from DBIDriver e.g., from package RSQLite, e.g., SQLite

conn

an optional DBIConnection object, as returned by dbConnect().

cacheId

Character string. If passed, this will override the calculated hash of the inputs, and return the result from this cacheId in the cachePath. Setting this is equivalent to manually saving the output of this function, i.e., the object will be on disk, and will be recovered in subsequent This may help in some particularly finicky situations where Cache is not correctly detecting unchanged inputs. This will guarantee the object will be identical each time; this may be useful in operational code.

linkToCacheId

Optional. If a cacheId is provided here, then a file.link will be made to the file with that cacheId name in the cache repo. This is used when identical outputs exist in the cache. This will save disk space.

Value

Run for its side effect. This will add the objectToSave to the cache located at cachePath, using cacheId as its id, while updating the database entry. It will do this using the future package, so it is written in a future.