Finds the packages in use in the project, and stores a list of those packages, their sources, and their current versions in packrat.
snapshot( project = NULL, available = NULL, lib.loc = libDir(project), ignore.stale = FALSE, dry.run = FALSE, prompt = interactive(), snapshot.sources = 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.
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
Computes the changes to your packrat state that would be made if a snapshot were performed, and prints them to the console.
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.
Boolean; should package sources be downloaded during snapshot?
TRUE, infer package dependencies by
examining R code used within the project. This included the R code
.R files, as well as other multi-mode documents