Get the Dependencies of a Module.

Get the list of declared dependencies of a module.

get_dependencies(name = .Last.name, load = FALSE)

Arguments

name	A string (character vector of lenght one). A module name can contain letters, figures and some special characters, namely _, -, and /. The latter is a namespace separator. Names containing /mock/, /mocks/, /test/, /tests/, /example/, or /examples/ have a special meaning related to code testing and examples. The name "modulr" corresponds to a special module and is therefore reserved.
load	A flag. Should an undefined module be implicitely loaded?

Value

A list of dependencies.

Warning

It is considered a very bad practice to define, touch, undefine, load, make, reset, or perform any other operation from within a module definition that may alterate the internal state of modulr.

See also

define, make, reset, and root_config.

Examples

reset()
#> [2018-12-02T17:13:59 CET] Resetting modulr state ... OK
define("foo", NULL, function() "foo")
#> [2018-12-02T17:13:59 CET] Defining 'foo' ... OK
define("bar", list(foo = "foo"), function(foo) paste0(foo, "bar"))
#> [2018-12-02T17:13:59 CET] Defining 'bar' ... OK
define("bar/mock", get_dependencies("bar"), function(foo) paste0(foo, "baz"))
#> [2018-12-02T17:13:59 CET] Defining 'bar/mock' ... OK
make("bar/mock")
#> [2018-12-02T17:13:59 CET] Making 'bar/mock' ...
#> [2018-12-02T17:13:59 CET] * Visiting and defining dependencies ...
#> [2018-12-02T17:13:59 CET] * Constructing dependency graph ... OK
#> [2018-12-02T17:13:59 CET] * Evaluating #1/1 (layer #1/1): 'foo' ...
#> [2018-12-02T17:13:59 CET] DONE ('bar/mock' in 0.05 secs)
#> [1] "foobaz"

reset()
#> [2018-12-02T17:13:59 CET] Resetting modulr state ... OK
tmp_dir <- tempfile("modulr_")
dir.create(tmp_dir)
cat('define("foo", NULL, function() "Hello")',
 file = file.path(tmp_dir, "foo.R"))
cat('define("bar", list(foo = "foo"), function() paste(foo, "World!"))',
 file = file.path(tmp_dir, "bar.R"))
root_config$set(tmp_dir)
## Not run: get_dependencies("bar", load = FALSE)
get_dependencies("bar", load = TRUE)
#> [2018-12-02T17:13:59 CET] Defining 'bar' ... OK
#> $foo
#> [1] "foo"
#> 
unlink(tmp_dir, recursive = TRUE)