pkgDepTopoSort internally so that the package
dependency tree is determined, and then packages are unloaded
in the reverse order. Some packages don't unload successfully for
a variety of reasons. Several known packages that have this problem
are identified internally and not unloaded. Currently, these are
detachAll( pkgs, dontTry = NULL, doSort = TRUE, verbose = getOption("Require.verbose") )
A character vector of packages to detach. Will be topologically sorted
A character vector of packages to not try. This can be used by a user if they find a package fails in attempts to unload it, e.g., "ps"
TRUE (the default), then the
pkgs will be
topologically sorted. If
FALSE, then it won't. Useful if the
pkgs are already sorted.
Numeric or logical indicating how verbose should the function
be. If -1 or -2, then as little verbosity as possible. If 0 or FALSE,
then minimal outputs; if
1 or TRUE, more outputs;
2 even more. NOTE: in
Require function, when
verbose >= 2, the return object will have an
attr(.., "Require") which has lots of information about the
processes of the installs.
A numeric named vector, with names of the packages that were attempted.
2 means the package was successfully unloaded,
1 it was
tried, but failed,
3 it was in the search path and was detached