snapshotImpl: Internal Snapshot Implementation

.snapshotImplR Documentation

Internal Snapshot Implementation


This is the internal implementation for snapshot. Most users should prefer calling snapshot.


  available = NULL,
  lib.loc = libDir(project), = FALSE,
  ignore.stale = FALSE,
  prompt = interactive(),
  auto.snapshot = FALSE,
  verbose = TRUE,
  fallback.ok = FALSE,
  snapshot.sources = TRUE,
  implicit.packrat.dependency = TRUE,
  infer.dependencies = TRUE



The project directory. Defaults to current working directory.


A database of available packages.


The library to snapshot. Defaults to the private library associated with the given directory.

Computes the changes to your packrat state that would be made if a snapshot were performed, and prints them to the console.


Stale packages are packages that are different from the last snapshot, but were installed by packrat. Typically, packages become stale when a new snapshot is available, but you haven't applied it yet with restore. By default, packrat will prevent you from taking a snapshot when you have stale packages to prevent you from losing changes from the unapplied snapshot. If your intent is to overwrite the last snapshot without applying it, use ignore.stale = TRUE to skip this check.


TRUE to prompt before performing snapshotting package changes that might be unintended; FALSE to perform these operations without confirmation. Potentially unintended changes include snapshotting packages at an older version than the last snapshot, or missing despite being present in the last snapshot.


Internal use – should be set to TRUE when this is an automatic snapshot.


Print output to the console while snapshot-ing?


Fall back to the latest CRAN version of a package if the locally installed version is unavailable?


Download the tarball associated with a particular package?


Include packrat as an implicit dependency of this project, if not otherwise discovered? This should be FALSE only if you can guarantee that packrat will be available via other means when attempting to load this project.


If TRUE, infer package dependencies by examining the R code.

packrat documentation built on June 30, 2022, 1:05 a.m.