Target Markdown

targets 0.5.0

Bug fixes

• Export in-memory config settings from _targets.yaml to parallel workers.

New features

• Add a limited-scope exclude argument to tar_watch() and tar_watch_server() (#458, @gorkang).
• Write a .gitignore file to ignore everything in _targets/meta/ except .gitignore and _targets/meta/meta.
• Target Markdown: add knitr engines for pipeline construction and prototyping from within literate programming documents (#469, @cderv, @nviets, @emilyriederer, @ijlyttle, @gshotwell, @gadenbuie, @tomsing1). Huge thanks to @cderv on this one for answering my deluge of questions, helping me figure out what was and was not possible in knitr, and ultimately circling me back to a successful approach.
• Add an RStudio R Markdown template for Target Markdown (#469).
• Implement use_targets(), which writes the Target Markdown template to the project root (#469).
• Implement tar_unscript() to clean up scripts written by Target Markdown.

Enhancements

• Enable priorities in tar_make() and tar_manifest().
• Show the priority in the print method of stem and pattern targets.
• Throw informative errors if the secondary arguments to pattern = slice() or pattern = sample() are invalid.
• In tar_target_raw(), assert that commands have length 1 when converted to expressions.
• Handle errors and post failure artifacts in the Github Actions YAML file.
• Rewrite the documentation on invalidation rules in tar_cue() (@maelle).
• Drop dplyr groups and "grouped_df" class in tar_group() (tarchetypes discussion #53, @kendonB).
• Assign branch names to dynamic branching return values produced by tar_read() and tar_read_raw().