Restore the R environment to a snapshot

restoreEnvironment(
  snapshot,
  stopOnWrongRVersion = FALSE,
  strict = FALSE,
  skipLast = TRUE
)

Arguments

snapshot: The snapshot data frame as generated using the takeEnvironmentSnapshot function.
stopOnWrongRVersion: Should the function stop when the wrong version of R is installed? Else just a warning will be thrown when the version doesn't match.
strict: If TRUE, the exact version of each package will installed. If FALSE, a package will only be installed if (a) a newer version is required than currently installed, or (b) the major version number is different.
skipLast: Skip last entry in snapshot? This is usually the study package that needs to be installed manually.

Details

This function restores the R environment to a previous snapshot, meaning all the packages will be restored to the versions they were at at the time of the snapshot. Note: on Windows you will very likely need to have RTools installed to build the various packages.

Examples

if (FALSE) {
snapshot <- takeEnvironmentSnapshot("OhdsiRTools")
write.csv(snapshot, "snapshot.csv")

# 5 years later

snapshot <- read.csv("snapshot.csv")
restoreEnvironment(snapshot)
}