Bug with "@import"ed data packages

[russHyde]

To reproduce:

In RStudio File -> New Project -> New Directory -> R Package
Package name = "temptanic"

This adds a package skeleton with R/hello.R. Running lintr::lint_package() flags a single whitespace lint in hello.R (irrelevant to the issue)

Add an R script to the package that imports the {titanic} package (https://cran.r-project.org/web/packages/titanic/index.html).

# dummy-imports.R

#' @import titanic
#'
NULL

Delete the initial NAMESPACE
Document the package - we see import(titanic) in NAMESPACE

Lint the {temptanic} package:

lintr::lint_package()
.Error in data.frame(pkg = ns, fun = getNamespaceExports(ns), stringsAsFactors = FALSE) : 
  arguments imply differing number of rows: 1, 0

(The same thing happens whether or not {titanic} is added to {temptanic}::Imports or Suggests)

Note the following:

> getNamespaceExports("titanic")
character(0)

As such, data.frame(pkg = "titanic", fun = getNamespaceExports("titanic"), stringsAsFactors = FALSE) complains due to mismatched argument lengths.

[russHyde]

Flagged with "good first issue".
For new contributors: any code changes should probably be tested from namespace_imports and you'd need to know how to mock "getNamespaceExports"

[IndrajeetPatil]

This is actually the same issue as #1503, and was fixed in #1509.

Here is a minimal reproducible example:

dir <- tempfile()
pkg <- usethis::create_package(dir, open = FALSE, rstudio = FALSE)
#> ✔ Creating '/var/folders/xr/v_vddzvs33q5wg7jv9mr__4h0000gn/T/RtmpIUx7xR/file8635186610ff/'
#> ✔ Setting active project to '/private/var/folders/xr/v_vddzvs33q5wg7jv9mr__4h0000gn/T/RtmpIUx7xR/file8635186610ff'
#> ✔ Creating 'R/'
#> ✔ Writing 'DESCRIPTION'
#> Package: file8635186610ff
#> Title: What the Package Does (One Line, Title Case)
#> Version: 0.0.0.9000
#> Authors@R (parsed):
#>     * First Last <first.last@example.com> [aut, cre] (YOUR-ORCID-ID)
#> Description: What the package does (one paragraph).
#> License: `use_mit_license()`, `use_gpl3_license()` or friends to pick a
#>     license
#> Encoding: UTF-8
#> Roxygen: list(markdown = TRUE)
#> RoxygenNote: 7.2.1
#> ✔ Writing 'NAMESPACE'
#> ✔ Setting active project to '<no active project>'
setwd(pkg)
fs::dir_create("R")
writeLines(
  c("#' @import titanic", "NULL"), 
  "R/script.R"
)
devtools::document()
#> ℹ Updating file8635186610ff documentation
#> ℹ Loading file8635186610ff
#> Writing 'NAMESPACE'
readLines("NAMESPACE")
#> [1] "# Generated by roxygen2: do not edit by hand"
#> [2] ""                                            
#> [3] "import(titanic)"
devtools::install(quiet = TRUE)
lintr::lint_package()

^{Created on 2022-09-25 with reprex v2.0.2}

Session info

sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#>  setting  value
#>  version  R version 4.2.1 (2022-06-23)
#>  os       macOS Monterey 12.5.1
#>  system   aarch64, darwin20
#>  ui       X11
#>  language (EN)
#>  collate  en_US.UTF-8
#>  ctype    en_US.UTF-8
#>  tz       Europe/Berlin
#>  date     2022-09-25
#>  pandoc   2.19.2 @ /usr/local/bin/ (via rmarkdown)
#> 
#> ─ Packages ───────────────────────────────────────────────────────────────────
#>  package          * version    date (UTC) lib source
#>  brio               1.1.3      2021-11-30 [1] CRAN (R 4.2.0)
#>  cachem             1.0.6      2021-08-19 [1] CRAN (R 4.2.0)
#>  callr              3.7.2      2022-08-22 [1] CRAN (R 4.2.0)
#>  cli                3.4.1      2022-09-23 [1] CRAN (R 4.2.1)
#>  crayon             1.5.1      2022-03-26 [1] CRAN (R 4.2.0)
#>  cyclocomp          1.1.0      2016-09-10 [1] CRAN (R 4.2.0)
#>  desc               1.4.2      2022-09-08 [1] CRAN (R 4.2.1)
#>  devtools           2.4.4.9000 2022-09-22 [1] Github (r-lib/devtools@9e2793a)
#>  digest             0.6.29     2021-12-01 [1] CRAN (R 4.2.0)
#>  ellipsis           0.3.2      2021-04-29 [1] CRAN (R 4.2.0)
#>  evaluate           0.16       2022-08-09 [1] CRAN (R 4.2.1)
#>  fansi              1.0.3      2022-03-24 [1] CRAN (R 4.2.0)
#>  fastmap            1.1.0      2021-01-25 [1] CRAN (R 4.2.0)
#>  file8635186610ff * 0.0.0.9000 2022-09-25 [1] local
#>  fs                 1.5.2      2021-12-08 [1] CRAN (R 4.2.0)
#>  glue               1.6.2      2022-02-24 [1] CRAN (R 4.2.0)
#>  highr              0.9        2021-04-16 [1] CRAN (R 4.2.0)
#>  htmltools          0.5.3      2022-07-18 [1] CRAN (R 4.2.1)
#>  htmlwidgets        1.5.4      2021-09-08 [1] CRAN (R 4.2.0)
#>  httpuv             1.6.6      2022-09-08 [1] CRAN (R 4.2.1)
#>  knitr              1.40       2022-08-24 [1] CRAN (R 4.2.1)
#>  later              1.3.0      2021-08-18 [1] CRAN (R 4.2.0)
#>  lazyeval           0.2.2      2019-03-15 [1] CRAN (R 4.2.0)
#>  lifecycle          1.0.2      2022-09-09 [1] CRAN (R 4.2.1)
#>  lintr              3.0.1.9000 2022-09-25 [1] local
#>  magrittr           2.0.3      2022-03-30 [1] CRAN (R 4.2.0)
#>  memoise            2.0.1      2021-11-26 [1] CRAN (R 4.2.0)
#>  mime               0.12       2021-09-28 [1] CRAN (R 4.2.0)
#>  miniUI             0.1.1.1    2018-05-18 [1] CRAN (R 4.2.0)
#>  pillar             1.8.1      2022-08-19 [1] CRAN (R 4.2.1)
#>  pkgbuild           1.3.1      2021-12-20 [1] CRAN (R 4.2.0)
#>  pkgconfig          2.0.3      2019-09-22 [1] CRAN (R 4.2.0)
#>  pkgload            1.3.0      2022-06-27 [1] CRAN (R 4.2.0)
#>  prettyunits        1.1.1      2020-01-24 [1] CRAN (R 4.2.0)
#>  processx           3.7.0      2022-07-07 [1] CRAN (R 4.2.1)
#>  profvis            0.3.7      2020-11-02 [1] CRAN (R 4.2.0)
#>  promises           1.2.0.1    2021-02-11 [1] CRAN (R 4.2.0)
#>  ps                 1.7.1      2022-06-18 [1] CRAN (R 4.2.0)
#>  purrr              0.3.4      2020-04-17 [1] CRAN (R 4.2.0)
#>  R.cache            0.16.0     2022-07-21 [1] CRAN (R 4.2.0)
#>  R.methodsS3        1.8.2      2022-06-13 [1] CRAN (R 4.2.0)
#>  R.oo               1.25.0     2022-06-12 [1] CRAN (R 4.2.0)
#>  R.utils            2.12.0     2022-06-28 [1] CRAN (R 4.2.0)
#>  R6                 2.5.1.9000 2022-08-06 [1] Github (r-lib/R6@87d5e45)
#>  Rcpp               1.0.9      2022-07-08 [1] CRAN (R 4.2.1)
#>  remotes            2.4.2      2021-11-30 [1] CRAN (R 4.2.0)
#>  reprex             2.0.2      2022-08-17 [1] CRAN (R 4.2.1)
#>  rex                1.2.1      2021-11-26 [1] CRAN (R 4.2.0)
#>  rlang              1.0.6      2022-09-24 [1] CRAN (R 4.2.1)
#>  rmarkdown          2.16       2022-08-24 [1] CRAN (R 4.2.1)
#>  roxygen2           7.2.1      2022-07-18 [1] CRAN (R 4.2.1)
#>  rprojroot          2.0.3      2022-04-02 [1] CRAN (R 4.2.0)
#>  rstudioapi         0.14       2022-08-22 [1] CRAN (R 4.2.1)
#>  sessioninfo        1.2.2      2021-12-06 [1] CRAN (R 4.2.0)
#>  shiny              1.7.2      2022-07-19 [1] CRAN (R 4.2.1)
#>  stringi            1.7.8      2022-07-11 [1] CRAN (R 4.2.1)
#>  stringr            1.4.1      2022-08-20 [1] CRAN (R 4.2.1)
#>  styler             1.7.0.9002 2022-09-13 [1] local
#>  testthat           3.1.4.9000 2022-09-22 [1] Github (r-lib/testthat@81dfbed)
#>  tibble             3.1.8      2022-07-22 [1] CRAN (R 4.2.1)
#>  titanic            0.1.0      2015-08-31 [1] CRAN (R 4.2.0)
#>  urlchecker         1.0.1      2021-11-30 [1] CRAN (R 4.2.0)
#>  usethis            2.1.6      2022-05-25 [1] CRAN (R 4.2.0)
#>  utf8               1.2.2      2021-07-24 [1] CRAN (R 4.2.0)
#>  vctrs              0.4.1      2022-04-13 [1] CRAN (R 4.2.0)
#>  withr              2.5.0      2022-03-03 [1] CRAN (R 4.2.0)
#>  xfun               0.33       2022-09-12 [1] CRAN (R 4.2.1)
#>  xml2               1.3.3      2021-11-30 [1] CRAN (R 4.2.0)
#>  xmlparsedata       1.0.5      2021-03-06 [1] CRAN (R 4.2.0)
#>  xtable             1.8-4      2019-04-21 [1] CRAN (R 4.2.0)
#>  yaml               2.3.5      2022-02-21 [1] CRAN (R 4.2.0)
#> 
#>  [1] /Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/library
#> 
#> ──────────────────────────────────────────────────────────────────────────────