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Code dependencies

Source: R/tar_deps.R, R/tar_deps_raw.R
tar_deps.Rd

List the dependencies of a function or expression. tar_deps() expects the expr argument to be an unevaluated expression, whereas tar_deps_raw() expects expr to be an evaluated expression object. Functions can be passed normally in either case.

Usage

tar_deps(expr)

tar_deps_raw(expr)

Arguments

expr

An R expression or function. tar_deps() expects the expr argument to be an unevaluated expression, whereas tar_deps_raw() expects expr to be an evaluated expression object. Functions can be passed normally in either case.

Value

Character vector of the dependencies of a function or expression.

Details

targets detects the dependencies of commands using static code analysis. Use tar_deps() to run the code analysis and see the dependencies for yourself.

See also

tar_branches(), tar_network()

Other inspect: tar_manifest(), tar_network(), tar_outdated(), tar_sitrep(), tar_validate()

Examples

tar_deps(x <- y + z)
#> [1] "+"  "<-" "y"  "z" 
tar_deps(quote(x <- y + z))
#> [1] "quote"
tar_deps({
  x <- 1
  x + a
})
#> [1] "+"  "<-" "a"  "{" 
tar_deps(function(a = b) map_dfr(data, ~do_row(.x)))
#> [1] ".x"      "b"       "data"    "do_row"  "map_dfr"
tar_deps_raw(function(a = b) map_dfr(data, ~do_row(.x)))
#> [1] ".x"      "b"       "data"    "do_row"  "map_dfr"