#RpackageAdvent2025
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johnsakaluk.bsky.social
Anyways. Lots to explore: new datasets, friendly/informative summary messages of scraped variables, tabling of latent correlations...

Next update will probably be less function-forward. @drmowinckels.io's #RPackageAdvent2025 thread has got me exited about website and documentation improvements.
January 7, 2026 at 4:49 PM
drmowinckels.io
My #RPackageAdvent2025 recap is live! 📦✨ Get the complete guide to modern R package development: setup, docs, testing, CI/CD, and CRAN submission. All 25 days of tips, tools, and best practices in one place! Dive in! #RStats #RPackageDevelopment
Link: https://drmo.site/8ny3eU
A festive digital illustration features the blue R logo wearing a red Santa hat with white trim on the left. To its right stands a green Christmas tree made entirely of curly braces arranged in a triangular shape. White and light-blue %>% pipe symbols float across a dark blue, starry background like snowflakes. A speech bubble above the R logo says “Ho Ho Ho! 📦” in red text. At the bottom, white text reads: “R Package Development Advent Calendar 2025” and below it, “25 Days of Coding Magic • Dec 1–25.
December 28, 2025 at 10:48 PM
drmowinckels.io
Excited to share my R Package Development Advent Calendar 2025 summary! 🎁 All 25 days of modern R pkg dev in one guide. Master `usethis`, GitHub Actions, `pkgdown`, `testthat`, & CRAN prep. Level up your R packages! 🚀 #RStats #RPackageAdvent2025 #Rpkg https://drmo.site/8ny3eU
A festive digital illustration features the blue R logo wearing a red Santa hat with white trim on the left. To its right stands a green Christmas tree made entirely of curly braces arranged in a triangular shape. White and light-blue %>% pipe symbols float across a dark blue, starry background like snowflakes. A speech bubble above the R logo says “Ho Ho Ho! 📦” in red text. At the bottom, white text reads: “R Package Development Advent Calendar 2025” and below it, “25 Days of Coding Magic • Dec 1–25.
December 28, 2025 at 10:37 PM
drmowinckels.io
Your Next Steps:
✨ Apply these tools to your packages
📚 Bookmark for reference
🤝 Share knowledge with community
🚀 Build amazing R packages

Thank you for following #RPackageAdvent2025! Now go make the R ecosystem better! 🎄📦
Keep Learning: r-pkgs.org | usethis.r-lib.org
R Packages (2e)
Learn how to create a package, the fundamental unit of shareable, reusable, and reproducible R code.
r-pkgs.org
December 26, 2025 at 11:01 AM
drmowinckels.io
We Made It! 🎉

25 days. Complete modern R package development workflow. From usethis automation to CRAN submission. You have everything you need!

#rstats #CRAN #RPackageAdvent2025 #ThatsAWrap
December 26, 2025 at 11:01 AM
drmowinckels.io
Day 25: CRAN Submission Checklist and cran-comments.md

Final steps for successful CRAN submission.

Pro Tip: Be proactive about communicating any unusual aspects of your package to CRAN reviewers.

#rstats #RPackageAdvent2025
December 25, 2025 at 11:01 AM
drmowinckels.io
Day 24: rlang - Tidy Evaluation in Packages

Handle user expressions safely in package functions.

Pro Tip: Use {{ }} (embrace) for single arguments, ... for multiple arguments.
Resources: rlang.r-lib.org

#rstats #RPackageAdvent2025
my_summarise <- function(data, ...) { data |> dplyr::summarise(...) } my_mutate <- function(data, col, value) { data |> dplyr::mutate({{ col }} := value) } my_function <- function(...) { dots <- rlang::list2(...) # process dots }
December 24, 2025 at 11:02 AM
johnsakaluk.bsky.social
Oh wow, that's a neat/powerful idea. Do you have an exemplar of this in action (that's convenient for you to recall)?

I think for our next release I'm just going to be working my way through a bunch of the suggestions in your #RPackageAdvent2025 (pkgdown themes!!!), and this one sounds really cool
December 23, 2025 at 4:44 PM
drmowinckels.io
Day 23: cli - Beautiful Command Line Interfaces

Create user-friendly messages and progress indicators.

Pro Tip: Use semantic markup like {.fn function_name} and {.val value} for consistent formatting.
Resources: cli.r-lib.org

#RpackageAdvent2025 #rstats
cli::cli_progress_bar("Processing files", total = length(files)) for (file in files) { # process file cli::cli_progress_update() } cli::cli_alert_success("Package built successfully!") cli::cli_alert_warning("Missing documentation for {.fn my_function}") cli::cli_abort("Invalid input: {.val {invalid_value}}")
December 23, 2025 at 11:01 AM
drmowinckels.io
Day 22: S3, S4, and S7 Object Systems

Create robust object-oriented interfaces with R's object systems.

Pro Tip: Use S3 for simple classes, S4 for complex validation, S7 for modern OOP.
Resources: rconsortium.github.io/S7

#rstats #RPackageAdvent2025
December 22, 2025 at 11:01 AM
drmowinckels.io
Day 21: rhub - Multi-Platform Testing (Thread)

Test your package on multiple platforms before CRAN submission.

Resources: r-hub.github.io/rhub/

#rstats #RPackageAdvent2025
December 21, 2025 at 11:01 AM
drmowinckels.io
Day 20: Performance Testing with bench

Profile and benchmark your package functions.

Pro Tip: Include benchmarks in your test suite to catch performance regressions.
Resources: bench.r-lib.org

#rstats #RPackageAdvent2025
bench::mark( my_function(big_data), filter_gc = FALSE ) results <- bench::mark( old_approach = old_function(data), new_approach = new_function(data), check = FALSE, # Skip result equality check iterations = 100 ) plot(results)
December 20, 2025 at 11:00 AM
drmowinckels.io
Day 19: goodpractice - Package Health Checks

Get comprehensive feedback on package quality

goodpractice::gp()

Checks include:
⬩ Function length and complexity
⬩ Namespace usage
⬩ DESCRIPTION completeness
⬩ Code coverage

Resources: github.com/mangothecat/goodpractice

#rstats #RPackageAdvent2025
GitHub - ropensci-review-tools/goodpractice: Advice on R Package Building
Advice on R Package Building. Contribute to ropensci-review-tools/goodpractice development by creating an account on GitHub.
github.com
December 19, 2025 at 11:01 AM
drmowinckels.io
Day 18: Use linters!

Maintain consistent, readable code style automatically.

Usage:
lintr::lint_package()
styler::style_pkg()

Pro Tip: Add both to pre-commit hooks for automatic code formatting.
Resources: lintr.r-lib.org

#rstats #RPackageAdvent2025
lintr::lint_package() styler::style_pkg() # .lintr file in project root linters: linters_with_defaults( line_length_linter(120), commented_code_linter = NULL )
December 18, 2025 at 11:01 AM
drmowinckels.io
Day 17: vcr - Recording API Calls for Tests

Record real API responses for reliable, fast tests without hitting live APIs.

Pro Tip: Commit cassette files to git for reproducible tests across environments.
Resources: docs.ropensci.org/vcr

#rstats #RPackageAdvent2025
# In vignette setup vcr::use_cassette("demo_data", { demo_data <- fetch_api_data("example") }) test_that("API returns expected data", { use_cassette("github_api", { response <- httr::GET("https://api.github.com/users/octocat") expect_equal(httr::status_code(response), 200) }) })
December 17, 2025 at 11:02 AM
drmowinckels.io
Day 16: Testing with Mocks using testthat
Test functions that depend on external resources using testthat's built-in mocking.

Pro Tip: Use local_mocked_bindings() to mock functions within the test scope only.
Resources: testthat.r-lib.org

#rstats #RPackageAdvent2025
December 16, 2025 at 11:01 AM
drmowinckels.io
Day 15: Snapshot Testing with testthat

Test complex outputs that are hard to specify exactly.

Pro Tip: Review snapshot changes carefully - they capture everything, including whitespace and formatting.

#rstats #RPackageAdvent2025
test_that("plots look right", { p <- ggplot(mtcars, aes(mpg, wt)) + geom_point() vdiffr::expect_doppelganger("mtcars-scatter", p) }) test_that("error messages are informative", { expect_snapshot(my_function(bad_input), error = TRUE) })
December 15, 2025 at 11:01 AM
drmowinckels.io
Day 14: testthat 3rd Edition Features
Modern testing with the latest testthat features.

Setup:
usethis::use_testthat(3)

Pro Tip: Use test_that() with descriptive names that explain what should happen.
Resources: testthat.r-lib.org

#rstats #RPackageAdvent2025
test_that("plot output is stable", { p <- my_plot(data) vdiffr::expect_doppelganger("basic-plot", p) })
December 14, 2025 at 11:01 AM
drmowinckels.io
Day 13: covr - Test Coverage Reporting

Track how much of your code is tested.

use #nocov for code you don't want to cover (like basic R functions etc)

Pro Tip: Focus on testing critical functions thoroughly rather than chasing 100%.
Resources: covr.r-lib.org

#rstats #RPackageAdvent2025
usethis::use_github_action("test-coverage") usethis::use_coverage() # Adds codecov badge covr::package_coverage() covr::report() covr::package_coverage() |> covr::zero_coverage()
December 13, 2025 at 11:01 AM
drmowinckels.io
Day 12: README.Rmd Automation

Create dynamic READMEs that stay up-to-date with your code.

Setup:
usethis::use_readme_rmd()

Include these sections:

󠁯•󠁏󠁏 Installation instructions
󠁯•󠁏󠁏 Basic usage example
󠁯•󠁏󠁏 Lifecycle badges
󠁯•󠁏󠁏 Build status badges

#rstats #RPackageAdvent2025
- name: Render README run: Rscript -e 'rmarkdown::render("README.Rmd")'
December 12, 2025 at 11:01 AM
drmowinckels.io
Day 11: NEWS.md and Semantic Versioning
Keep users informed about package changes.

Create NEWS.md:
usethis::use_news_md()

Pro Tip: Follow semantic versioning: MAJOR.MINOR.PATCH for breaking.feature.bugfix changes.

#rstats #RPackageAdvent2025
# mypackage 1.2.0 ## New features * Added `new_function()` for advanced analysis (#15) ## Bug fixes * Fixed issue with missing values in `existing_function()` (#12) ## Breaking changes * `old_param` renamed to `new_param` in `main_function()`
December 11, 2025 at 11:01 AM
drmowinckels.io
Day 10: lifecycle - Managing Function Deprecation

Communicate changes to users gracefully with lifecycle badges.

Setup:
usethis::use_lifecycle()

Pro Tip: Use lifecycle stages: experimental → stable → superseded → deprecated.
Resources: lifecycle.r-lib.org

#rstats #RPackageAdvent2025
#' @lifecycle experimental new_function <- function() { # function body } #' @lifecycle deprecated old_function <- function() { lifecycle::deprecate_warn("1.0.0", "old_function()", "new_function()") # function body }
December 10, 2025 at 11:01 AM
drmowinckels.io
Day 9: Vignettes with knitr and rmarkdown

Create comprehensive tutorials and examples for your package.

usethis::use_vignette("getting-started")

● Start with a clear problem statement
● Show realistic examples
● Keep computational time under 5 minutes

#rstats #RPackageAdvent2025
December 9, 2025 at 11:01 AM
weare.rladies.org
I'm also a keen R package developer, and huge fan of the devtools/usethis/r-lib ecosystem which provides the tooling to make package development intuitive, (relatively) easy and joyous.

@drmowinckels.io is currently posting an amazing series on this: check out #RPackageAdvent2025
December 8, 2025 at 3:29 PM
drmowinckels.io
Day 8: pkgdown Customization and Deployment

Transform your package documentation into a polished website.

Advanced customization:

Auto-deployment:
usethis::use_github_action("pkgdown")

Pro Tip: Group functions logically in the reference section for better navigation.

#rstats #RPackageAdvent2025
template: params: bootswatch: flatly reference: - title: "Data manipulation" contents: - starts_with("mutate") - ends_with("_join")
December 8, 2025 at 11:01 AM