load_all
Load complete package.
load_all
loads a package. It roughly simulates what happens
when a package is installed and loaded with library()
.
Usage
load_all(
path = ".",
reset = TRUE,
recompile = FALSE,
export_all = TRUE,
helpers = TRUE,
quiet = FALSE,
...
)
Arguments
- path
Path to a package, or within a package.
- reset
clear package environment and reset file cache before loading any pieces of the package. This is equivalent to running
unload()
and is the default. Usereset = FALSE
may be faster for large code bases, but is a significantly less accurate approximation.- recompile
DEPRECATED. force a recompile of DLL from source code, if present. This is equivalent to running
pkgbuild::clean_dll()
beforeload_all
- export_all
If
TRUE
(the default), export all objects. IfFALSE
, export only the objects that are listed as exports in the NAMESPACE file.- helpers
if
TRUE
loads testthat test helpers.- quiet
if
TRUE
suppresses output from this function.- ...
Additional arguments passed to
pkgload::load_all()
.
Details
Currently load_all
:
Loads all data files in
data/
. Seeload_data()
for more details.Sources all R files in the R directory, storing results in environment that behaves like a regular package namespace. See below and
load_code()
for more details.Compiles any C, C++, or Fortran code in the
src/
directory and connects the generated DLL into R. Seecompile_dll()
for more details.Runs
.onAttach()
,.onLoad()
and.onUnload()
functions at the correct times.If you use testthat, will load all test helpers so you can access them interactively. devtools sets the
DEVTOOLS_LOAD
environment variable to"true"
to let you check whether the helpers are run during package loading.
Namespaces
The namespace environment <namespace:pkgname>
, is a child of
the imports environment, which has the name attribute
imports:pkgname
. It is in turn is a child of
<namespace:base>
, which is a child of the global environment.
(There is also a copy of the base namespace that is a child of the empty
environment.)
The package environment <package:pkgname>
is an ancestor of the
global environment. Normally when loading a package, the objects
listed as exports in the NAMESPACE file are copied from the namespace
to the package environment. However, load_all
by default will
copy all objects (not just the ones listed as exports) to the package
environment. This is useful during development because it makes all
objects easy to access.
To export only the objects listed as exports, use
export_all=FALSE
. This more closely simulates behavior when
loading an installed package with library()
, and can be
useful for checking for missing exports.
Shim files
load_all
also inserts shim functions into the imports environment
of the loaded package. It presently adds a replacement version of
system.file
which returns different paths from
base::system.file
. This is needed because installed and uninstalled
package sources have different directory structures. Note that this is not
a perfect replacement for base::system.file
.
Examples
# NOT RUN {
# Load the package in the current directory
load_all("./")
# Running again loads changed files
load_all("./")
# With reset=TRUE, unload and reload the package for a clean start
load_all("./", TRUE)
# With export_all=FALSE, only objects listed as exports in NAMESPACE
# are exported
load_all("./", export_all = FALSE)
# }