tar_progress_branches()

[wlandau]

Prework

• I understand and agree to the code of conduct and the contributing guidelines.
• I have already submitted an issue to the issue tracker to discuss my idea with the maintainer.
• This pull request is not a draft.

Related GitHub issues and pull requests

• Ref: Show within-target progress when using tar_watch for dynamic branching #273

Summary

The new tar_progress_branches() function tabulates progress information for patterns. Useful for #273.

library(targets)

tar_script({
  options(crayon.enabled = FALSE)
  list(
    tar_target(x, seq_len(2)),
    tar_target(y, x, pattern = map(x)),
    tar_target(z, stopifnot(y < 1.5), pattern = map(y))
  )
})

tar_make()
#> ● run target x
#> ● run branch y_29239c8a
#> ● run branch y_7cc32924
#> ● run branch z_d0697b30
#> ● run branch z_959da4d3
#> x error branch z_959da4d3
#> Error : y < 1.5 is not TRUE
#> Error: callr subprocess failed: y < 1.5 is not TRUE

tar_progress_branches()
#> # A tibble: 2 x 6
#>   name  branches running built canceled errored
#>   <chr>    <int>   <int> <int>    <int>   <int>
#> 1 y            2       0     2        0       0
#> 2 z            2       0     1        0       1

^{Created on 2021-01-21 by the reprex package (v0.3.0)}