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tarchetypes-package: targets: Archetypes for Targets

Literate programming targets

tar_knit() tar_knit_raw(): Target with a knitr document.

tar_quarto() tar_quarto_raw(): Target with a Quarto project.

tar_quarto_rep() tar_quarto_rep_raw(): Parameterized Quarto with dynamic branching.

tar_render() tar_render_raw(): Target with an R Markdown document.

tar_render_rep() tar_render_rep_raw(): Parameterized R Markdown with dynamic branching.

Literate programming utilities

tar_knitr_deps(): List literate programming dependencies.

tar_knitr_deps_expr(): Expression with literate programming dependencies.

tar_quarto_files(): Quarto file detection

Target factories for storage formats

tar_url() tar_file() tar_file_fast() tar_rds() tar_qs() tar_keras() tar_torch() tar_arrow_feather() tar_parquet() tar_fst() tar_fst_dt() tar_fst_tbl() tar_nanoparquet(): Target factories for storage formats

Storage formats

tar_format_nanoparquet(): Nanoparquet format

Simple files

tar_file_read(): Track a file and read the contents.

Static branching

tar_combine() tar_combine_raw(): Static aggregation

tar_map(): Static branching.

Dynamic branching over files

tar_files() tar_files_raw(): Dynamic branching over output or input files.

tar_files_input() tar_files_input_raw(): Dynamic branching over input files or URLs

Dynamic grouped data frames

tar_group_by(): Group a data frame target by one or more variables.

tar_group_count(): Group the rows of a data frame into a given number groups

tar_group_select(): Group a data frame target with tidyselect semantics.

tar_group_size(): Group the rows of a data frame into groups of a given size.

Dynamic batched replication

tar_rep() tar_rep_raw(): Batched replication with dynamic branching.

tar_rep2() tar_rep2_raw(): Dynamic batched computation downstream of tar_rep()

Dynamic batched replication within static branches for data frames

tar_map_rep() tar_map_rep_raw(): Dynamic batched replication within static branches for data frames.

Batched dynamic-within-static branching for data frames

tar_map2_count() tar_map2_count_raw(): Dynamic-within-static branching for data frames (count batching).

tar_map2_size() tar_map2_size_raw(): Dynamic-within-static branching for data frames (size batching).

Dynamic batched replication indexing

tar_rep_index(): Get overall rep index.

Target selection

tar_select_names(): Select target names from a target list

tar_select_targets(): Select target definition objects from a target list

Targets with custom invalidation rules

tar_age(): Create a target that runs when the last run gets old

tar_change(): Target that responds to an arbitrary change.

tar_download(): Target that downloads URLs.

tar_force(): Target with a custom condition to force execution.

tar_skip(): Target with a custom cancellation condition.

Cues

tar_cue_age() tar_cue_age_raw(): Cue to run a target when the last output reaches a certain age

tar_cue_force(): Cue to force a target to run if a condition is true

tar_cue_skip(): Cue to skip a target if a condition is true

Hooks

tar_hook_before() tar_hook_before_raw(): Hook to prepend code

tar_hook_inner() tar_hook_inner_raw(): Hook to wrap dependencies

tar_hook_outer() tar_hook_outer_raw(): Hook to wrap commands

Metaprogramming utilities

tar_eval() tar_eval_raw(): Evaluate multiple expressions created with symbol substitution.

tar_sub() tar_sub_raw(): Create multiple expressions with symbol substitution.

Domain-specific languages for pipeline construction

tar_assign(): An assignment-based pipeline DSL

tar_plan(): A drake-plan-like pipeline DSL

tar_tangle(): Convert Quarto or R Markdown to a pipeline