NEWS.md

Version 7.13.10

• Remove environment locking, c.f. r-lib/rlang#1705.
• Export S3 methods.
• Avoid memo_expr() because it causes errors on R-devel.

Version 7.13.9

• Avoid is.R().

Version 7.13.8

• Fix CRAN note.

Version 7.13.7

• Fix test for CRAN.

Version 7.13.6

• Migrate to the new interface in clustermq 0.9.0 (@mschubert).

Version 7.13.5

• Always pass a character vector to rm() and remove().

Version 7.13.4

• Fix HTML documentation files.

Version 7.13.3

• Improve error messages from static code analysis of malformed code (#1371, @billdenney).
• Handle invalid language objects in commands (#1372, @gorgitko).
• Do not lock namespaces (#1373, @gorgitko).
• Compatibility with rlang PR 1255.

Version 7.13.2

• Update SLURM batchtools template file can be brewed (#1359, @pat-s).
• Change start-up message to tip about targets.

Version 7.13.1

• Add files NOTICE and inst/NOTICE to more explicitly credit code included from other open source projects. (Previously drake just had comments in the source with links to the various projects.)

Version 7.13.0

Bug fixes

• Avoid checking printed output in test of testing infrastructure.
• Use dsl_sym() instead of as.symbol() when constructing commands for combine() (#1340, @vkehayas).

New features

• Add a new level_separation argument to vis_drake_graph() and render_drake_graph() to control the aspect ratio of visNetwork graphs (#1303, @matthewstrasiotto, @matthiasgomolka, @robitalec).

Version 7.12.7

Enhancements

• Deprecate caching = "master" in favor of caching = "main".
• Improve the error message when a valid plan is not supplied (#1334, @robitalec).

Version 7.12.6

Bug fixes

• Fix defunct functions error message when using namespace (#1310, @malcolmbarrett).
• Preserve names of list elements in .data in DSL (#1323, @shirdekel).
• Use identical() to compare file hashes (#1324, @shirdekel).
• Set seed = TRUE in future::future().
• Manually relay warnings when parallelism = "clustermq" and caching = "worker" (@richardbayes).

Enhancements

• Make logs more machine-readable by sanitizing messages and preventing race conditions (#1331, @Plebejer).

Version 7.12.5

Bug fixes

• Sanitize empty symbols in language columns (#1299, @odaniel1).
• Handle cases where NROW() throws an error (#1300, julian-tagell on Stack Overflow).
• Prohibit dynamic branching over non-branching dynamic files (#1302, @djbirke).

Enhancements

• Transition to updated lifecycle that does not require badges to be in man/figures.
• Improve error message for empty dynamic grouping variables (#1308, @saadaslam).
• Expose the log_worker argument of clustermq::workers() to make() and drake_config() (#1305, @billdenney, @mschubert).
• Set as.is to TRUE in utils::type.convert() (#1309, @bbolker).

Version 7.12.4

• Fix a CRAN warning about docs.

Version 7.12.3

Bug fixes

• cached_planned() and cached_unplanned() now work with non-standard cache locations (#1268, @Plebejer).
• Set use_cache to FALSE more often (#1257, @Plebejer).
• Use namespaced function calls in mtcars example instead of loading packages.
• Replace the iris dataset with the airquality dataset in all documentation, examples, and tests (#1271).
• Assign functions created with code_to_function() to the proper environment (#1275, @robitalec).
• Store tracebacks as character vectors and restrict the contents of error objects to try to prevent accidental storage of large data from the environment (#1276, @billdenney).
• Strongly depend on tidyselect (#1274, @dernst).
• Avoid txtq lockfiles (#1232, #1239, #1280, @danwwilson, @pydupont, @mattwarkentin).

New features

• Add a new drake_script() function to write _drake.R files for r_make() (#1282).

Enhancements

• Deprecate expose_imports() in favor of make(envir = getNamespace("yourPackage") (#1286, @mvarewyck).
• Suppress the message recommending r_make() if getOption("drake_r_make_message") is FALSE (#1238, @januz).
• Improve the appearance of the visNetwork graph by using the hierarchical layout with visEdges(smooth = list(type = "cubicBezier", forceDirection = TRUE)) (#1289, @mstr3336).

Version 7.12.2

Bug fixes

• Invalidate old sub-targets when finalizing a dynamic target (@richardbayes). Solves a major reproducibility bug (#1260).
• Prevent splice_inner() from dropping formal arguments shared by c() (#1262, @bart1).

Version 7.12.1

Bug fixes

• Repair subtarget_hashes.cross() for crosses on a single grouping variable.
• Repair dynamic group() used with specialized formats (#1236, @adamaltmejd).
• Enforce tidyselect >= 1.0.0.

New features

• Allow user-defined target names in static branching with the .names argument (#1240, @maciejmotyka, @januz).

Enhancements

• Do not analyze dependencies of calls to drake_plan() (#1237, @januz).
• Error message for locked cache gives paste-able error message in Windows (#1243, @billdenney).
• Prevent stack traces from accidentally storing large amounts of data (#1253, @sclewis23).

Version 7.12.0

Bug fixes

• Ensure up-to-date sub-targets are skipped even if the dynamic parent does not get a chance to finalize (#1209, #1211, @psadil, @kendonB).
• Restrict static transforms so they only use the upstream part of the plan (#1199, #1200, @bart1).
• Correctly match the names and values of dynamic cross() sub-targets (#1204, @psadil). Expansion order is the same, but names are correctly matched now.
• Stop trying to remove file_out() files in clean(), even when garbage_collection is TRUE (#521, @the-Hull).
• Fix keep_going = TRUE for formatted targets (#1206).
• Use the correct variable names in logger helper (progress_bar instead of progress) so that drake works without the progress package (#1208, @mbaccou).
• Avoid conflict between formats and upstream dynamic targets (#1210, @psadil).
• Always compute trigger metadata up front because recovery keys need it.
• Deprecate and remove hasty mode and custom parallel backends (#1222).
• Compartmentalize fixed runtime parameters in config$settings (#965).

New features

• Add new functions drake_done() and drake_cancelled() (#1205).

Speedups

• Avoid reading build times of dynamic sub-targets in drake_graph_info() (#1207).

Enhancements

• Show an empty progress bar just before targets start to build when verbose is 2 (#1203, @kendonB).
• Deprecate the jobs argument of clean().
• Show an informative error message for empty dynamic grouping variables (#1212, @kendonB).
• Throw error messages if users supply dynamic targets to drake_build() or drake_debug() (#1214, @kendonB).
• Log the sub-target name and index of the failing sub-target in the metadata of the sub-target and its parent (#1214, @kendonB).
• Shorten the call stack in error metadata.
• Deprecate and remove custom schedulers (#1222).
• Deprecate hasty_build (#1222).
• Migrate constant runtime parameters to config$settings (#965).
• Warn the user if file_in()/file_out()/knitr_in() files are not literal strings (#1229).
• Prohibit file_out() and knitr_in() in imported functions (#1229).
• Prohibit knitr_in() in dynamic branching (#1229).
• Improve the help file of target().
• Deprecate and rename progress functions to avoid potential name conflicts (progress() => drake_progress(), running() => drake_running(), failed() => drake_failed()) (#1205).

Version 7.11.0

Bug fixes

• Sanitize internal S3 classes for target storage (#1159, @rsangole).
• Bump digest version to require 0.6.21 (#1166, @boshek)
• Actually store output file sizes in metadata.
• Use the depend trigger to toggle invalidation from dynamic-only dependencies, including the max_expand argument of make().
• Repair session_info argument parsing (and reduce calls to utils::sessionInfo() in tests).
• Ensure compatibility with tibble 3.0.0.

New features

• Allow dynamic files with target(format = "file") (#1168, #1127).
• Implement dynamic max_expand on a target-by-target basis via target() (#1175, @kendonB).

Enhancements

• Assert dependencies of formats at the very beginning of make(), not in drake_config() (#1156).
• In make(verbose = 2), remove the spinner and use a progress bar to track how many targets are done so far.
• Reduce logging of utility functions.
• Improve the aesthetics of console messages using cli (optional package).
• Deprecate console_log_file in favor of log_make as an argument to make() and drake_config().
• Immediately relay warnings and messages in "loop" and "future" parallel backends (#400).
• Warn when converting trailing dots (#1147).
• Warn about imports with trailing dots on Windows (#1147).
• Allow user-defined caches for the loadd() RStudio addin through the new rstudio_drake_cache global option (#1169, @joelnitta).
• Change dynamic target finalization message to "finalize" instead of "aggregate" (#1176, @kendonB).
• Describe the limits of recoverable(), e.g. dynamic branching + dynamic files.
• Throw an error instead of a warning in drake_plan() if a grouping variable is undefined or invalid (#1182, @kendonB).
• Rigorous S3 framework for static code analysis objects of type drake_deps and drake_deps_ht (#1183).
• Use rlang::trace_back() to make diagnose()$error$calls nicer (#1198).

Version 7.10.0

Unavoidable but minor breaking changes

These changes invalidate some targets in some workflows, but they are necessary bug fixes.

• Remove spurious local variables detected in $<-() and @<-() (#1144).
• Avoid target names with trailing dots (#1147, @Plebejer).

Bug fixes

• Handle unequal list columns in bind_plans() (#1136, @jennysjaarda).
• Handle non-vector sub-targets in dynamic branching (#1138).
• Handle calls in analyze_assign() (#1119, @jennysjaarda).
• Restore correct environment locking (#1143, @kuriwaki).
• Log "running" progress of dynamic targets.
• Log dynamic targets as failed if a sub-target fails (#1158).

New features

• Add a new "fst_tbl" format for large tibble targets (#1154, @kendonB).
• Add a new format argument to make(), an optional custom storage format for targets without an explicit target(format = ...) in the plan (#1124).
• Add a new lock_cache argument to make() to optionally suppress cache locking (#1129). (It can be annoying to interrupt make() repeatedly and unlock the cache manually every time.)
• Add new functions cancel() and cancel_if() function to cancel targets mid-build (#1131).
• Add a new subtarget_list argument to loadd() and readd() to optionally load a dynamic target as a list of sub-targets (#1139, @MilesMcBain).
• Prohibit dynamic file_out() (#1141).

Enhancements

• Check for illegal formats early on at the drake_config() level (#1156, @MilesMcBain).
• Smoothly deprecate the config argument in all user-side functions (#1118, @vkehayas). Users can now supply the plan and other make() arguments directly, without bothering with drake_config(). Now, you only need to call drake_config() in the _drake.R file for r_make() and friends. Old code with config objects should still work. Affected functions:
  • make()
  • outdated()
  • drake_build()
  • drake_debug()
  • recoverable()
  • missed()
  • deps_target()
  • deps_profile()
  • drake_graph_info()
  • vis_drake_graph()
  • sankey_drake_graph()
  • drake_graph()
  • text_drake_graph()
  • predict_runtime(). Needed to rename the targets argument to targets_predict and jobs to jobs_predict.
  • predict_workers(). Same argument name changes as predict_runtime().
• Because of #1118, the only remaining user-side purpose of drake_config() is to serve functions r_make() and friends.
• Document the limitations of grouping variables (#1128).
• Handle the @ operator. For example, in the static code analysis of x@y, do not register y as a dependency (#1130, @famuvie).
• Remove superfluous/incorrect information about imports from the output of deps_profile() (#1134, @kendonB).
• Append hashes to deps_target() output (#1134, @kendonB).
• Add S3 class and pretty print method for drake_meta_() objects objects.
• Use call stacks instead of environment inheritance to power drake_envir() and id_chr() (#1132).
• Allow drake_envir() to select the environment with imports (#882).
• Improve visualization labels for dynamic targets: clarify that the listed runtime is a total runtime over all sub-targets and list the number of sub-targets.

Version 7.9.0

Breaking changes in dynamic branching

• Embrace the vctrs paradigm and its type stability for dynamic branching (#1105, #1106).
• Accept target as a symbol by default in read_trace(). Required for the trace to make sense in #1107.

Bug fixes

• Repair reference to custom HPC resources in the "future" backend (#1083, @jennysjaarda).
• Properly copy data when importing targets from one cache into another (#1120, @brendanf).
• Prevent dynamic vector sizes from conflicting with file sizes in metadata.

New features

• Add a new log_build_times argument to make() and drake_config(). Allows users to disable the recording of build times. Produces a speedup of up to 20% on Macs (#1078).
• Implement cache locking to prohibit concurrent calls to make(), outdated(make_imports = TRUE), recoverable(make_imports = TRUE), vis_drake_graph(make_imports = TRUE), clean(), etc. on the same cache.
• Add a new format trigger to invalidate targets when the specialized data format changes (#1104, @kendonB).
• Add new functions cache_planned() and cache_unplanned() to help selectively clean workflows with dynamic targets (#1110, @kendonB).
• Add S3 classes and pretty print methods for drake_config() objects and analyze_code() objects.
• Add a new "qs" format (#1121, @kendonB).

Speedups

• Avoid setting seeds for imports (#1086, @adamkski).
• Avoid working directly with POSIXct times (#1086, @adamkski)
• Avoid excessive calls to %||% (%|||% is faster). (#1089, @billdenney)
• Remove %||NA due to slowness (#1089, @billdenney).
• Use hash tables to speed up is_dynamic() and is_subtarget() (#1089, @billdenney).
• Use getVDigest() instead of digest() (#1089, #1092, eddelbuettel/digest#139 (comment), @eddelbuettel, @billdenney).
• Pre-compute backtick and .deparseOpts() to speed up deparse() (#1086, https://stackoverflow.com/users/516548/g-grothendieck, @adamkski).
• Pre-compute which targets exist in advance (#1095).
• Avoid gratuitous cache interactions and data frame operations in build_times() (#1098).
• Use mget_hash() in progress() (#1098).
• Get target progress info only once in drake_graph_info() (#1098).
• Speed up the retrieval of old metadata in outdated() (#1098).
• In make(), avoid checking for nonexistent metadata for missing targets.
• Reduce logging in drake_config().

Enhancements

• Write a complete project structure in use_drake() (#1097, @lorenzwalthert, @tjmahr).
• Add a minor logger note to say how many dynamic sub-targets are registered at a time (#1102, @kendonB).
• Handle dependencies that are dynamic targets but not declared as such for the current target (#1107).
• Internally, the "layout" data structure is now called the "workflow specification", or "spec" for short. The spec is drake's interpretation of the plan. In the plan, all the dependency relationships among targets and files are implicit. In the spec, they are all explicit. We get from the plan to the spec using static code analysis, e.g. analyze_code().

Version 7.8.0

Bug fixes

• Prevent drake::drake_plan(x = target(...)) from throwing an error if drake is not loaded (#1039, @mstr3336).
• Move the transformations lifecycle badge to the proper location in the docstring (#1040, @jeroen).
• Prevent readd() / loadd() from turning an imported function into a target (#1067).
• Align in-memory disk.frame targets with their stored values (#1077, @brendanf).

New features

• Implement dynamic branching (#685).
• Add a new subtargets() function to get the cached names of the sub-targets of a dynamic target.
• Add new subtargets arguments to loadd() and readd() to retrieve specific sub-targets from a parent dynamic target.
• Add new get_trace() and read_trace() functions to help track which values of grouping variables go into the making of dynamic sub-targets.
• Add a new id_chr() function to get the name of the target while make() is running.
• Implement plot(plan) (#1036).
• vis_drake_graph(), drake_graph_info(), and render_drake_graph() now take arguments that allow behavior to be defined upon selection of nodes. (#1031,@mstr3336).
• Add a new max_expand argument to make() and drake_config() to scale down dynamic branching (#1050, @hansvancalster).

Enhancements

• Document transformation functions in a way that avoids having to create true functions (#979).
• Avoid always invalidating the memoized layout when we set the knitr hash.
• Change the names of environments in drake_config() objects.
• Assert that prework is a language object, list of language objects, or character vector (#1 at pat-s/multicore-debugging on GitHub, @pat-s).
• Use an environment instead of a list for config$layout. Supports internal modifications by reference. Required for #685.
• Clean up the code of the parallel backends.
• Make dynamic a formal argument of target().
• Always lock/unlock the environment target by target, allowing informative error messages to appear more readily (#1062, @PedramNavid)
• Automatically ignore storrs and decorated storrs (#1071).
• Speed up memory management by avoiding a call to setdiff() and avoiding names(config$envir_targets).

Version 7.7.0

Bug fixes

• Take the sum instead of the max in dir_size(). Incurs rehashing for some workflows, but should not invalidate any targets.

New features

• Add a new which_clean() function to preview which targets will be invalidated by clean() (#1014, @pat-s).
• Add serious import and export methods for the decorated storr (#1015, @billdenney, @noamross).
• Add a new "diskframe" format for larger-than-memory data (#1004, @xiaodaigh).
• Add a new drake_tempfile() function to help with "diskframe" format. It makes sure we are not copying large datasets across different physical storage media (#1004, @xiaodaigh).
• Add new function code_to_function() to allow for parsing script based workflows into functions so drake_plan() can begin to manage the workflow and track dependencies. (#994, @thebioengineer)

Enhancements

• Coerce seeds to integers in seed_trigger() (#1013, @CreRecombinase).
• Hard wrap long labels in graph visuals (#1017).
• Nest the history txtq API inside decorated storr API (#1020).
• Reduce cyclomatic complexity of internal functions.
• Reduce retrievals of old target metadata to try to improve performance (#1027).

Version 7.6.2

Bug fixes

• Remove README.md from CRAN altogether. Also remove all links from the news and vignette. The links trigger too many CRAN notes, which made the automated checks too brittle.
• Serialize formats that need serialization (like "keras") before sending the data from HPC workers to the main process (#989).
• Check for custom-formatted files when checking checksums.
• Force fst-formatted targets to plain data frames. Same goes for the new "fst_dt" format.
• Change the meaning and behavior of max_expand in drake_plan(). max_expand is now the maximum number of targets produced by map(), split(), and cross(). For cross(), this reduces the number of targets (less cumbersome) and makes the subsample of targets more representative of the complete grid. It also. ensures consistent target naming when .id is FALSE (#1002). Note: max_expand is not for production workflows anyway, so this change does not break anything important. Unfortunately, we do lose the speed boost in drake_plan() originally due to max_expand, but drake_plan() is still fast, so that is not so bad.
• Drop specialized formats of NULL targets (#998).
• Prevent false grouping variables from partially tagging along in cross() (#1009). The same fix should apply to map() and split() too.
• Respect graph topology when recovering old grouping variables for map() (#1010).

New features

• Add a new "fst_dt" format for fst-powered saving of data.table objects.
• Support a custom "caching" column of the plan to select main vs worker caching for each target individually (#988).
• Make transform a formal argument of target() so that users do not have to type "transform =" all the time in drake_plan() (#993).
• Migrate the documentation website from ropensci.github.io/drake to docs.ropensci.org/drake.

Enhancements

• Document the HPC limitations of target(format = "keras") (#989).
• Remove the now-superfluous vignette.
• Wrap up console and text file logging functionality into a reference class (#964).
• Deprecate the verbose argument in various caching functions. The location of the cache is now only printed in make(). This made the previous feature easier to implement.
• Carry forward nested grouping variables in combine() (#1008).
• Improve the encapsulation of hash tables in the decorated storr (#968).

Version 7.6.1

Bug fixes

• CRAN hotfix: remove a broken link in the README.

Version 7.6.0

Bug fixes

• Make drake_plan(transform = slice()) understand .id and grouping variables (#963).
• Repair clean(garbage_collection = TRUE, destroy = TRUE). Previously it destroyed the cache before trying to collect garbage.
• Ensure that r_make() passes informative error messages back to the calling process (#969).
• Avoid downloading full contents of URLs when rehashing (#982)
• Retain upstream grouping variables of map() and cross() on topologically side-by-side targets (#983).
• Manually enforce the correct ordering in dsl_left_outer_join() so cross() selects the right combinations of existing targets (#986). This bug was probably introduced in the solution to #983.
• Make the output of progress() more consistent, less dependent on whether tidyselect is installed.

New features

• Support specialized data storage via a decorated cache and format argument of target() (#971). This allows users to leverage faster ways to save and load targets, such as write_fst() for data frames and save_model_hdf5() for Keras models. It also improves memory because it prevents storr from making a serialized in-memory copy of large data objects.
• Add tidyselect functionality for ... in progress(), analogous to loadd(), build_times(), and clean().
• Support S3 for user-defined generics (#959). If the generic do_stuff() and the method stuff.your_class() are defined in envir, and if do_stuff() has a call to UseMethod("stuff"), then drake's code analysis will detect stuff.your_class() as a dependency of do_stuff().
• Add authentication support for file_in() URLs. Requires the new curl_handles argument of make() and drake_config() (#981).

Enhancements

• Document DSL keywords as if they were true functions: target(), map(), split(), cross(), and combine() (#979).
• Do garbage collection between the unloading and loading phases of memory management.
• Keep file_out() files in clean() unless garbage_collection is TRUE. That way, make(recover = TRUE) is a true "undo button" for clean(). clean(garbage_collection = TRUE) still removes data in the cache, as well as any file_out() files from targets currently being cleaned.
• The menu in clean() only appears if garbage_collection is TRUE. Also, this menu is added to rescue_cache(garbage_collection = TRUE).
• Reorganize the internal code files and functions to make development easier.
• Move the history inside the cache folder .drake/. The old .drake_history/ folder was awkward. Old histories are migrated during drake_config(), and drake_history().
• Add lifecycle badges to exported functions.

Version 7.5.2

Bug fixes

• Eliminate accidental creations of .drake_history in plan_to_code(), plan_to_notebook(), and the examples in the help files.

Version 7.5.1

Bug fixes

• Change .drake_history$ to ^.drake_history$ in .Rbuildignore appease CRAN checks.
• Repair help file examples.

Version 7.5.0

New features

• Add automated data recovery (#945). This is still experimental and disabled by default. Requires make(recover = TRUE).
• Add new functions recoverable() and r_recoverable() to show targets that are outdated but recoverable via make(recover = TRUE).
• Track the history and provenance of targets, viewable with drake_history(). Powered by txtq (#918, #920).
• Add a new no_deps() function, similar to ignore(). no_deps() suppresses dependency detection but still tracks changes to the literal code (#910).
• Add a new "autoclean" memory strategy (#917).
• Export transform_plan().
• Allow a custom seed column of drake plans to set custom seeds (#947).
• Add a new seed trigger to optionally ignore changes to the target seed (#947).

Enhancements

• In drake_plan(), interpret custom columns as non-language objects (#942).
• Suggest and assert clustermq >= 0.8.8.
• Log the target name in a special column in the console log file (#909).
• Rename the "memory" memory strategy to "preclean" (with deprecation; #917).
• Deprecate ensure_workers in drake_config() and make().
• Warn when the user supplies additional arguments to make() after config is already supplied.
• Prevent users from running make() from inside the cache (#927).
• Add CITATION file with JOSS paper.
• In deps_profile(), include the seed and change the names.
• Allow the user to set a different seed in make(). All this does is invalidate old targets.
• Use set_hash() and get_hash() in storr to double the speed of progress tracking.

Bug fixes

• In the static code analysis for dependency detection, ignore list elements referenced with $ (#938).
• Minor: handle strings embedded in language objects (#934).
• Minor: supply xxhash64 as the default hash algorithm for non-storr hashing if the driver does not have a hash algorithm.

Version 7.4.0

Mildly breaking changes

These changes are technically breaking changes, but they should only affect advanced users.

• rescue_cache() no longer returns a value.

Bug fixes

• Restore compatibility with clustermq (#898). Suggest version >= 0.8.8 but allow 0.8.7 as well.
• Ensure drake recomputes config$layout when knitr reports change (#887).
• Do not rehash large imported files every make() (#878).
• Repair parsing of long tidy eval inputs in the DSL (#878).
• Clear up cache confusion when a custom cache exists adjacent to the default cache (#883).
• Accept targets as symbols in r_drake_build().
• Log progress during r_make() (#889).
• Repair expose_imports(): do not do the environment<- trick unless the object is a non-primitive function.
• Use different static analyses of assign() vs delayedAssign().
• Fix a superfluous code analysis warning incurred by multiple file_in() files and other strings (#896).
• Make ignore() work inside loadd(), readd(), file_in(), file_out(), and knitr_in().

New features

• Add experimental support for URLs in file_in() and file_out(). drake now treats file_in()/file_out() files as URLS if they begin with "http://", "https://", or "ftp://". The fingerprint is a concatenation of the ETag and last-modified timestamp. If neither can be found or if there is no internet connection, drake throws an error.
• Implement new memory management strategies "unload" and "none", which do not attempt to load a target's dependencies from memory (#897).
• Allow users to give each target its own memory strategy (#897).
• Add drake_slice() to help split data across multiple targets. Related: #77, #685, #833.
• Introduce a new drake_cache() function, which is now recommended instead of get_cache() (#883).
• Introduce a new r_deps_target() function.
• Add RStudio addins for r_make(), r_vis_drake_graph(), and r_outdated() (#892).

Enhancements

• Deprecate get_cache() in favor of drake_cache().
• Show the path to the cache in the clean() menu prompt.
• Stop removing the console log file on each call to drake_config().
• Log the node name (short host name) and process ID in the console log file.
• Log the name of the calling function in the console log file, e.g. "begin make()" and "end make()". Applies to all functions that accept a config argument.
• Memory management: set use_cache to FALSE in storr function calls for saving and loading targets. Also, at the end of make(), call flush_cache() (and then gc() if garbage collection is enabled).
• Mention callr::r() within commands as a safe alternative to lock_envir = FALSE in the self-invalidation section of the make() help file.
• Use file size to help decide when to rehash file_in()/file_out()/knitr_in() files. We now rehash files if the file is less than 100 KB or the time stamp changed or the file size changed.

Version 7.3.0

Bug fixes

• Accommodate rlang's new interpolation operator {{, which was causing make() to fail when drake_plan() commands are enclosed in curly braces (#864).
• Move "config$lock_envir <- FALSE" from loop_build() to backend_loop(). This makes sure config$envir is correctly locked in make(parallelism = "clustermq").
• Convert factors to characters in the optional .data argument of map() and cross() in the DSL.
• In the DSL of drake_plan(), repair cross(.data = !!args), where args is an optional data frame of grouping variables.
• Handle trailing slashes in file_in()/file_out() directories for Windows (#855).
• Make .id_chr work with combine() in the DSL (#867).
• Do not try make_spinner() unless the version of cli is at least 1.1.0.

New features

• Add functions text_drake_graph() (and r_text_drake_graph() and render_text_drake_graph()). Uses text art to print a dependency graph to the terminal window. Handy for when users SSH into remote machines without X Window support.
• Add a new max_expand argument to drake_plan(), an optional upper bound on the lengths of grouping variables for map() and cross() in the DSL. Comes in handy when you have a massive number of targets and you want to test on a miniature version of your workflow before you scale up to production.

Enhancements

• Delay the initialization of clustermq workers for as long as possible. Before launching them, build/check targets locally until we reach an outdated target with hpc equal to FALSE. In other words, if no targets actually require clustermq workers, no workers get created.
• In make(parallelism = "future"), reset the config$sleep() backoff interval whenever a new target gets checked.
• Add a "done" message to the console log file when the workflow has completed.
• Replace CodeDepends with a base R solution in code_to_plan(). Fixes a CRAN note.
• The DSL (transformations in drake_plan()) is no longer experimental.
• The callr API (r_make() and friends) is no longer experimental.
• Deprecate the wildcard/text-based functions for creating plans: evaluate_plan(), expand_plan(), map_plan(), gather_plan(), gather_by(), reduce_plan(), reduce_by().
• Change some deprecated functions to defunct: deps(), max_useful_jobs(), and migrate_drake_project().

Version 7.2.0

Mildly breaking changes

• In the DSL (e.g. drake_plan(x = target(..., transform = map(...))) avoid inserting extra dots in target names when the grouping variables are character vectors (#847). Target names come out much nicer this way, but those name changes will invalidate some targets (i.e. they need to be rebuilt with make()).

Bug fixes

• Use config$jobs_preprocess (local jobs) in several places where drake was incorrectly using config$jobs (meant for targets).
• Allow loadd(x, deps = TRUE, config = your_config) to work even if x is not cached (#830). Required disabling tidyselect functionality when deps TRUE. There is a new note in the help file about this, and an informative console message prints out on loadd(deps = TRUE, tidyselect = TRUE). The default value of tidyselect is now !deps.
• Minor: avoid printing messages and warnings twice to the console (#829).
• Ensure compatibility with testthat >= 2.0.1.9000.

New features

• In drake_plan() transformations, allow the user to refer to a target's own name using a special .id_chr symbol, which is treated like a character string.
• Add a transparency argument to drake_ggraph() and render_drake_ggraph() to disable transparency in the rendered graph. Useful for R installations without transparency support.

Enhancements

• Use a custom layout to improve node positions and aspect ratios of vis_drake_graph() and drake_ggraph() displays. Only activated in vis_drake_graph() when there are at least 10 nodes distributed in both the vertical and horizontal directions.
• Allow nodes to be dragged both vertically and horizontally in vis_drake_graph() and render_drake_graph().
• Prevent dots from showing up in target names when you supply grouping variables to transforms in drake_plan() (#847).
• Do not keep drake plans (drake_plan()) inside drake_config() objects. When other bottlenecks are removed, this will reduce the burden on memory (re #800).
• Do not retain the targets argument inside drake_config() objects. This is to reduce memory consumption.
• Deprecate the layout and direction arguments of vis_drake_graph() and render_drake_graph(). Direction is now always left to right and the layout is always Sugiyama.
• Write the cache log file in CSV format (now drake_cache.csv by default) to avoid issues with spaces (e.g. entry names with spaces in them, such as "file report.Rmd")`.

Version 7.1.0

Bug fixes

• In drake 7.0.0, if you run make() in interactive mode and respond to the menu prompt with an option other than 1 or 2, targets will still build.
• Make sure file outputs show up in drake_graph(). The bug came from append_output_file_nodes(), a utility function of drake_graph_info().
• Repair r_make(r_fn = callr::r_bg()) re #799.
• Allow drake_ggraph() and sankey_drake_graph() to work when the graph has no edges.

New features

• Add a new use_drake() function to write the make.R and _drake.R files from the "main example". Does not write other supporting scripts.
• With an optional logical hpc column in your drake_plan(), you can now select which targets to deploy to HPC and which to run locally.
• Add a list argument to build_times(), just like loadd().
• Add a new RStudio addin: 'loadd target at cursor' which can be bound a keyboard shortcut to load the target identified by the symbol at the cursor position to the global environment.

Enhancements

• file_in() and file_out() can now handle entire directories, e.g. file_in("your_folder_of_input_data_files") and file_out("directory_with_a_bunch_of_output_files").
• Send less data from config to HPC workers.
• Improve drake_ggraph()
  • Hide node labels by default and render the arrows behind the nodes.
  • Print an informative error message when the user supplies a drake plan to the config argument of a function.
  • By default, use gray arrows and a black-and-white background with no gridlines.
• For the map() and cross() transformations in the DSL, prevent the accidental sorting of targets by name (#786). Needed merge(sort = FALSE) in dsl_left_outer_join().
• Simplify verbosity. The verbose argument of make() now takes values 0, 1, and 2, and maximum verbosity in the console prints targets, retries, failures, and a spinner. The console log file, on the other hand, dumps maximally verbose runtime info regardless of the verbose argument.
• In previous versions, functions generated with f <- Rcpp::cppFunction(...) did not stay up to date from session to session because the addresses corresponding to anonymous pointers were showing up in deparse(f). Now, drake ignores those pointers, and Rcpp functions compiled inline appear to stay up to date. This problem was more of an edge case than a bug.
• Prepend time stamps with sub-second times to the lines of the console log file.
• In drake_plan(), deprecate the tidy_evaluation argument in favor of the new and more concise tidy_eval. To preserve back compatibility for now, if you supply a non-NULL value to tidy_evaluation, it overwrites tidy_eval.
• Reduce the object size of drake_config() objects by assigning closure of config$sleep to baseenv().

Version 7.0.0

Breaking changes

• The enhancements that increase cache access speed also invalidate targets in old projects. Workflows built with drake <= 6.2.1 will need to run from scratch again.
• In drake plans, the command and trigger columns are now lists of language objects instead of character vectors. make() and friends still work if you have character columns, but the default output of drake_plan() has changed to this new format.
• All parallel backends (parallelism argument of make()) except "clustermq" and "future" are removed. A new "loop" backend covers local serial execution.
• A large amount of deprecated functionality is now defunct, including several functions (built(), find_project(), imported(), and parallel_stages(); full list at #564) and the single-quoted file API.
• Set the default value of lock_envir to TRUE in make() and drake_config(). So make() will automatically quit in error if the act of building a target tries to change upstream dependencies.
• make() no longer returns a value. Users will need to call drake_config() separately to get the old return value of make().
• Require the jobs argument to be of length 1 (make() and drake_config()). To parallelize the imports and other preprocessing steps, use jobs_preprocess, also of length 1.
• Get rid of the "kernels" storr namespace. As a result, drake is faster, but users will no longer be able to load imported functions using loadd() or readd().
• In target(), users must now explicitly name all the arguments except command, e.g. target(f(x), trigger = trigger(condition = TRUE)) instead of target(f(x), trigger(condition = TRUE)).
• Fail right away in bind_plans() when the result has duplicated target names. This makes drake's API more predictable and helps users catch malformed workflows earlier.
• loadd() only loads targets listed in the plan. It no longer loads imports or file hashes.
• The return values of progress(), deps_code(), deps_target(), and predict_workers() are now data frames.
• Change the default value of hover to FALSE in visualization functions. Improves speed.

Bug fixes

• Allow bind_plans() to work with lists of plans (bind_plans(list(plan1, plan2)) was returning NULL in drake 6.2.0 and 6.2.1).
• Ensure that get_cache(path = "non/default/path", search = FALSE) looks for the cache in "non/default/path" instead of getwd().
• Remove strict dependencies on package tibble.
• Pass the correct data structure to ensure_loaded() in meta.R and triggers.R when ensuring the dependencies of the condition and change triggers are loaded.
• Require a config argument to drake_build() and loadd(deps = TRUE).

New features

• Introduce a new experimental domain-specific language for generating large plans (#233). Details in the "Plans" chapter of the manual.
• Implement a lock_envir argument to safeguard reproducibility. More discussion: #619, #620.
• The new from_plan() function allows the users to reference custom plan columns from within commands. Changes to values in these columns columns do not invalidate targets.
• Add a menu prompt (#762) to safeguard against make() pitfalls in interactive mode (#761). Appears once per session. Disable with options(drake_make_menu = FALSE).
• Add new API functions r_make(), r_outdated(), etc. to run drake functions more reproducibly in a clean session. See the help file of r_make() for details.
• progress() gains a progress argument for filtering results. For example, progress(progress = "failed") will report targets that failed.

Enhancements

• Large speed boost: move away from storr's key mangling in favor of drake's own encoding of file paths and namespaced functions for storr keys.
• Exclude symbols ., .., and .gitignore from being target names (consequence of the above).
• Use only one hash algorithm per drake cache, which the user can set with the hash_algorithm argument of new_cache(), storr::storr_rds(), and various other cache functions. Thus, the concepts of a "short hash algorithm" and "long hash algorithm" are deprecated, and the functions long_hash(), short_hash(), default_long_hash_algo(), default_short_hash_algo(), and available_hash_algos() are deprecated. Caches are still back-compatible with drake > 5.4.0 and <= 6.2.1.
• Allow the magrittr dot symbol to appear in some commands sometimes.
• Deprecate the fetch_cache argument in all functions.
• Remove packages DBI and RSQLite from "Suggests".
• Define a special config$eval <- new.env(parent = config$envir) for storing built targets and evaluating commands in the plan. Now, make() no longer modifies the user's environment. This move is a long-overdue step toward purity.
• Remove dependency on the codetools package.
• Deprecate and remove the session argument of make() and drake_config(). Details: in #623.
• Deprecate the graph and layout arguments to make() and drake_config(). The change simplifies the internals, and memoization allows us to do this.
• Warn the user if running make() in a subdirectory of the drake project root (determined by the location of the .drake folder in relation to the working directory).
• In the code analysis, explicitly prohibit targets from being dependencies of imported functions.
• Increase options for the verbose argument, including the option to print execution and total build times.
• Separate the building of targets from the processing of imports. Imports are processed with rudimentary staged parallelism (mclapply() or parLapply(), depending on the operating system).
• Ignore the imports when it comes to build times. Functions build_times(), predict_runtime(), etc. focus on only the targets.
• Deprecate many API functions, including plan_analyses(), plan_summaries(), analysis_wildcard(), cache_namespaces(), cache_path(), check_plan(), dataset_wildcard(), drake_meta(), drake_palette(), drake_tip(), recover_cache(), cleaned_namespaces(), target_namespaces(), read_drake_config(), read_drake_graph(), and read_drake_plan().
• Deprecate target() as a user-side function. From now on, it should only be called from within drake_plan().
• drake_envir() now throws an error, not a warning, if called in the incorrect context. Should be called only inside commands in the user's drake plan.
• Replace *expr*() rlang functions with their *quo*() counterparts. We still keep rlang::expr() in the few places where we know the expressions need to be evaluated in config$eval.
• The prework argument to make() and drake_config() can now be an expression (language object) or list of expressions. Character vectors are still acceptable.
• At the end of make(), print messages about triggers etc. only if verbose >= 2L.
• Deprecate and rename in_progress() to running().
• Deprecate and rename knitr_deps() to deps_knitr().
• Deprecate and rename dependency_profile() to deps_profile().
• Deprecate and rename predict_load_balancing() to predict_workers().
• Deprecate this_cache() and defer to get_cache() and storr::storr_rds() for simplicity.
• Change the default value of hover to FALSE in visualization functions. Improves speed. Also a breaking change.
• Deprecate drake_cache_log_file(). We recommend using make() with the cache_log_file argument to create the cache log. This way ensures that the log is always up to date with make() results.

Version 6.2.1

Version 6.2.1 is a hotfix to address the failing automated CRAN checks for 6.2.0. Chiefly, in CRAN's Debian R-devel (2018-12-10) check platform, errors of the form "length > 1 in coercion to logical" occurred when either argument to && or || was not of length 1 (e.g. nzchar(letters) && length(letters)). In addition to fixing these errors, version 6.2.1 also removes a problematic link from the vignette.

Version 6.2.0

New features

• Add a sep argument to gather_by(), reduce_by(), reduce_plan(), evaluate_plan(), expand_plan(), plan_analyses(), and plan_summaries(). Allows the user to set the delimiter for generating new target names.
• Expose a hasty_build argument to make() and drake_config(). Here, the user can set the function that builds targets in "hasty mode" (make(parallelism = "hasty")).
• Add a new drake_envir() function that returns the environment where drake builds targets. Can only be accessed from inside the commands in the workflow plan data frame. The primary use case is to allow users to remove individual targets from memory at predetermined build steps.

Bug fixes

• Ensure compatibility with tibble 2.0.0.
• Stop returning 0s from predict_runtime(targets_only = TRUE) when some targets are outdated and others are not.
• Remove sort(NULL) warnings from create_drake_layout(). (Affects R-3.3.x.)

Enhancements

• Remove strict dependencies on packages evaluate, formatR, fs, future, parallel, R.utils, stats, and stringi.
• Large speed boost: reduce repeated calls to parse() in code_dependencies().
• Large speed boost: change the default value of memory_strategy (previously pruning_strategy) to "speed" (previously "lookahead").
• Compute a special data structure in drake_config() (config$layout) just to store the code analysis results. This is an intermediate structure between the workflow plan data frame and the graph. It will help clean up the internals in future development.
• Improve memoized preprocessing: deparse all the functions in the environment so the memoization does not react so spurious changes in R internals. Related: #345.
• Use the label argument to future() inside make(parallelism = "future"). That way , job names are target names by default if job.name is used correctly in the batchtools template file.
• Remove strict dependencies on packages dplyr, evaluate, fs, future, magrittr, parallel, R.utils, stats, stringi, tidyselect, and withr.
• Remove package rprojroot from "Suggests".
• Deprecate the force argument in all functions except make() and drake_config().
• Change the name of prune_envir() to manage_memory().
• Deprecate and rename the pruning_strategy argument to memory_strategy (make() and drake_config()).
• Print warnings and messages to the console_log_file in real time (#588).
• Use HTML line breaks in vis_drake_graph() hover text to display commands in the drake plan more elegantly.
• Speed up predict_load_balancing() and remove its reliance on internals that will go away in 2019 via #561.
• Remove support for the worker column of config$plan in predict_runtime() and predict_load_balancing(). This functionality will go away in 2019 via #561.
• Change the names of the return value of predict_load_balancing() to time and workers.
• Bring the documentation of predict_runtime() and predict_load_balancing() up to date.
• Deprecate drake_session() and rename to drake_get_session_info().
• Deprecate the timeout argument in the API of make() and drake_config(). A value of timeout can be still passed to these functions without error, but only the elapsed and cpu arguments impose actual timeouts now.

Version 6.1.0

New features

• Add a new map_plan() function to easily create a workflow plan data frame to execute a function call over a grid of arguments.
• Add a new plan_to_code() function to turn drake plans into generic R scripts. New users can use this function to better understand the relationship between plans and code, and unsatisfied customers can use it to disentangle their projects from drake altogether. Similarly, plan_to_notebook() generates an R notebook from a drake plan.
• Add a new drake_debug() function to run a target's command in debug mode. Analogous to drake_build().
• Add a mode argument to trigger() to control how the condition trigger factors into the decision to build or skip a target. See the ?trigger for details.
• Add a new sleep argument to make() and drake_config() to help the main process consume fewer resources during parallel processing.
• Enable the caching argument for the "clustermq" and "clustermq_staged" parallel backends. Now, make(parallelism = "clustermq", caching = "main") will do all the caching with the main process, and make(parallelism = "clustermq", caching = "worker") will do all the caching with the workers. The same is true for parallelism = "clustermq_staged".
• Add a new append argument to gather_plan(), gather_by(), reduce_plan(), and reduce_by(). The append argument control whether the output includes the original plan in addition to the newly generated rows.
• Add new functions load_main_example(), clean_main_example(), and clean_mtcars_example().
• Add a filter argument to gather_by() and reduce_by() in order to restrict what we gather even when append is TRUE.
• Add a hasty mode: make(parallelism = "hasty") skips all of drake's expensive caching and checking. All targets run every single time and you are responsible for saving results to custom output files, but almost all the by-target overhead is gone.

Bug fixes

• Ensure commands in the plan are re-analyzed for dependencies when new imports are added (#548). Was a bug in version 6.0.0 only.
• Call path.expand() on the file argument to render_drake_graph() and render_sankey_drake_graph(). That way, tildes in file paths no longer interfere with the rendering of static image files.
• Skip tests and examples if the required "Suggests" packages are not installed.
• Stop checking for non-standard columns. Previously, warnings about non-standard columns were incorrectly triggered by evaluate_plan(trace = TRUE) followed by expand_plan(), gather_plan(), reduce_plan(), gather_by(), or reduce_by(). The more relaxed behavior also gives users more options about how to construct and maintain their workflow plan data frames.
• Use checksums in "future" parallelism to make sure files travel over network file systems before proceeding to downstream targets.
• Refactor and clean up checksum code.
• Skip more tests and checks if the optional visNetwork package is not installed.

Enhancements

• Stop earlier in make_targets() if all the targets are already up to date.
• Improve the documentation of the seed argument in make() and drake_config().
• Set the default caching argument of make() and drake_config() to "main" rather than "worker". The default option should be the lower-overhead option for small workflows. Users have the option to make a different set of tradeoffs for larger workflows.
• Allow the condition trigger to evaluate to non-logical values as long as those values can be coerced to logicals.
• Require that the condition trigger evaluate to a vector of length 1.
• Keep non-standard columns in drake_plan_source().
• make(verbose = 4) now prints to the console when a target is stored.
• gather_by() and reduce_by() now gather/reduce everything if no columns are specified.
• Change the default parallelization of the imports. Previously, make(jobs = 4) was equivalent to make(jobs = c(imports = 4, targets = 4)). Now, make(jobs = 4) is equivalent to make(jobs = c(imports = 1, targets = 4)). See issue #553 for details.
• Add a console message for building the priority queue when verbose is at least 2.
• Condense load_mtcars_example().
• Deprecate the hook argument of make() and drake_config().
• In gather_by() and reduce_by(), do not exclude targets with all NA gathering variables.

Version 6.0.0

Breaking changes

• Avoid serialization in digest() wherever possible. This puts old drake projects out of date, but it improves speed.
• Require R version >= 3.3.0 rather than >= 3.2.0. Tests and checks still run fine on 3.3.0, but the required version of the stringi package no longer compiles on 3.2.0.
• Be more discerning in detecting dependencies. In code_dependencies(), restrict the possible global variables to the ones mentioned in the new globals argument (turned off when NULL. In practical workflows, global dependencies are restricted to items in envir and proper targets in the plan. In deps_code(), the globals slot of the output list is now a list of candidate globals, not necessarily actual globals (some may not be targets or variables in envir).

Bug fixes

• In the call to unlink() in clean(), set recursive and force to FALSE. This should prevent the accidental deletion of whole directories.
• Previously, clean() deleted input-only files if no targets from the plan were cached. A patch and a unit test are included in this release.
• loadd(not_a_target) no longer loads every target in the cache.
• Exclude each target from its own dependency metadata in the "deps" igraph vertex attribute (fixes #503).
• Detect inline code dependencies in knitr_in() file code chunks.
• Remove more calls to sort(NULL) that caused warnings in R 3.3.3.
• Fix a bug on R 3.3.3 where analyze_loadd() was sometimes quitting with "Error: attempt to set an attribute on NULL".
• Do not call digest::digest(file = TRUE) on directories. Instead, set hashes of directories to NA. Users should still not directories as file dependencies.
• If files are declared as dependencies of custom triggers ("condition" and "change") include them in vis_drake_graph(). Previously, these files were missing from the visualization, but actual workflows worked just fine.
• Work around mysterious codetools failures in R 3.3 (add a tryCatch() statement in find_globals()).

New features

• Add a proper clustermq-based parallel backend: make(parallelism = "clustermq").
• evaluate_plan(trace = TRUE) now adds a *_from column to show the origins of the evaluated targets. Try evaluate_plan(drake_plan(x = rnorm(n__), y = rexp(n__)), wildcard = "n__", values = 1:2, trace = TRUE).
• Add functions gather_by() and reduce_by(), which gather on custom columns in the plan (or columns generated by evaluate_plan(trace = TRUE)) and append the new targets to the previous plan.
• Expose the template argument of clustermq functions (e.g. Q() and workers()) as an argument of make() and drake_config().
• Add a new code_to_plan() function to turn R scripts and R Markdown reports into workflow plan data frames.
• Add a new drake_plan_source() function, which generates lines of code for a drake_plan() call. This drake_plan() call produces the plan passed to drake_plan_source(). The main purpose is visual inspection (we even have syntax highlighting via prettycode) but users may also save the output to a script file for the sake of reproducibility or simple reference.
• Deprecate deps_targets() in favor of a new deps_target() function (singular) that behaves more like deps_code().

Enhancements

• Smooth the edges in vis_drake_graph() and render_drake_graph().
• Make hover text slightly more readable in in vis_drake_graph() and render_drake_graph().
• Align hover text properly in vis_drake_graph() using the "title" node column.
• Optionally collapse nodes into clusters with vis_drake_graph(collapse = TRUE).
• Improve dependency_profile() show major trigger hashes side-by-side to tell the user if the command, a dependency, an input file, or an output file changed since the last make().
• Choose more appropriate places to check that the txtq package is installed.
• Improve the help files of loadd() and readd(), giving specific usage guidance in prose.
• Memoize all the steps of build_drake_graph() and print to the console the ones that execute.
• Skip some tests if txtq is not installed.

Version 5.4.0

• Overhaul the interface for triggers and add new trigger types ("condition" and "change").
• Offload drake's code examples to the drake-examples GitHub repository and make make drake_example() and drake_examples() download examples from there.
• Optionally show output files in graph visualizations. See the show_output_files argument to vis_drake_graph() and friends.
• Repair output file checksum operations for distributed backends like "clustermq_staged" and "future_lapply".
• Internally refactor the igraph attributes of the dependency graph to allow for smarter dependency/memory management during make().
• Enable vis_drake_graph() and sankey_drake_graph() to save static image files via webshot.
• Deprecate static_drake_graph() and render_static_drake_graph() in favor of drake_ggraph() and render_drake_ggraph().
• Add a columns argument to evaluate_plan() so users can evaluate wildcards in columns other than the command column of plan.
• Name the arguments of target() so users do not have to (explicitly).
• Lay the groundwork for a special pretty print method for workflow plan data frames.

Version 5.3.0

• Allow multiple output files per command.
• Add Sankey diagram visuals: sankey_drake_graph() and render_sankey_drake_graph().
• Add static_drake_graph() and render_static_drake_graph() for ggplot2/ggraph static graph visualizations.
• Add group and clusters arguments to vis_drake_graph(), static_drake_graph(), and drake_graph_info() to optionally condense nodes into clusters.
• Implement a trace argument to evaluate_plan() to optionally add indicator columns to show which targets got expanded/evaluated with which wildcard values.
• Rename the always_rename argument to rename in evaluate_plan().
• Add a rename argument to expand_plan().
• Implement make(parallelism = "clustermq_staged"), a clustermq-based staged parallelism backend (see #452).
• Implement make(parallelism = "future_lapply_staged"), a future-based staged parallelism backend (see #450).
• Depend on codetools rather than CodeDepends for finding global variables.
• Detect loadd() and readd() dependencies in knitr reports referenced with knitr_in() inside imported functions. Previously, this feature was only available in explicit knitr_in() calls in commands.
• Skip more tests on CRAN. White-list tests instead of blacklisting them in order to try to keep check time under the official 10-minute cap.
• Disallow wildcard names to grep-match other wildcard names or any replacement values. This will prevent careless mistakes and confusion when generating drake_plan()s.
• Prevent persistent workers from hanging when a target fails.
• Move the example template files to inst/hpc_template_files.
• Deprecate drake_batchtools_tmpl_file() in favor of drake_hpc_template_file() and drake_hpc_template_files().
• Add a garbage_collection argument to make(). If TRUE, gc() is called after every new build of a target.
• Remove redundant calls to sanitize_plan() in make().
• Change tracked() to accept only a drake_config() object as an argument. Yes, it is technically a breaking change, but it is only a small break, and it is the correct API choice.
• Move visualization and hpc package dependencies to "Suggests:" rather than "Imports:" in the DESCRIPTION file.
• Allow processing of codeless knitr reports without warnings.

Version 5.2.1

• Skip several long-running and low-priority tests on CRAN.

Version 5.2.0

• Sequester staged parallelism in backends "mclapply_staged" and "parLapply_staged". For the other lapply-like backends, drake uses persistent workers and a main process. In the case of "future_lapply" parallelism, the main process is a separate background process called by Rscript.
• Remove the appearance of staged parallelism from single-job make()'s. (Previously, there were "check" messages and a call to staged_parallelism().)
• Remove some remnants of staged parallelism internals.
• Allow different parallel backends for imports vs targets. For example, make(parallelism = c(imports = "mclapply_staged", targets = "mclapply").
• Fix a bug in environment pruning. Previously, dependencies of downstream targets were being dropped from memory in make(jobs = 1). Now, they are kept in memory until no downstream target needs them (for make(jobs = 1)).
• Improve predict_runtime(). It is a more sensible way to go about predicting runtimes with multiple jobs. Likely to be more accurate.
• Calls to make() no longer leave targets in the user's environment.
• Attempt to fix a Solaris CRAN check error. A test was previously failing on CRAN's Solaris machine (R 3.5.0). In the test, one of the threads deliberately quits in error, and the R/Solaris installation did not handle this properly. The test should work now because it no longer uses any parallelism.
• Deprecate the imports_only argument to make() and drake_config() in favor of skip_targets.
• Deprecate migrate_drake_project().
• Deprecate max_useful_jobs().
• For non-distributed parallel backends, stop waiting for all the imports to finish before the targets begin.
• Add an upstream_only argument to failed() so users can list failed targets that do not have any failed dependencies. Naturally accompanies make(keep_going = TRUE).
• Add an RStudio R Markdown template.
• Remove plyr as a dependency.
• Handle duplicated targets better in drake_plan() and bind_plans().
• Add a true function target() to help create drake plans with custom columns.
• In drake_gc(), clean out disruptive files in storrs with mangled keys (re: #198).
• Move all the vignettes to the up and coming user manual.
• Rename the "basic example" to the "mtcars example".
• Deprecate load_basic_example() in favor of load_mtcars_example().
• Refocus the README.md file on the main example rather than the mtcars example.
• Use a README.Rmd file to generate README.md.
• Add function deps_targets().
• Deprecate function deps() in favor of deps_code()
• Add a pruning_strategy argument to make() and drake_config() so the user can decide how drake keeps non-import dependencies in memory when it builds a target.
• Add optional custom (experimental) "workers" and "priorities" columns to the drake plans to help users customize scheduling.
• Add a makefile_path argument to make() and drake_config() to avoid potential conflicts between user-side custom Makefiles and the one written by make(parallelism = "Makefile").
• Document batch mode for long workflows in the HPC guide.
• Add a console argument to make() and drake_config() so users can redirect console output to a file.
• Make it easier for the user to find out where a target in the cache came from: show_source(), readd(show_source = TRUE), loadd(show_source = TRUE).

Version 5.1.2

• In R 3.5.0, the !! operator from tidyeval and rlang is parsed differently than in R <= 3.4.4. This change broke one of the tests in tests/testthat/tidy-eval.R The main purpose of drake's 5.1.2 release is to fix the broken test.
• Fix an elusive R CMD check error from building the pdf manual with LaTeX.
• In drake_plan(), allow users to customize target-level columns using target() inside the commands.
• Add a new bind_plans() function to concatenate the rows of drake plans and then sanitize the aggregate plan.
• Add an optional session argument to tell make() to build targets in a separate, isolated main R session. For example, make(session = callr::r_vanilla).

Version 5.1.0

• Add a reduce_plan() function to do pairwise reductions on collections of targets.
• Forcibly exclude the dot (.) from being a dependency of any target or import. This enforces more consistent behavior in the face of the current static code analysis functionality, which sometimes detects . and sometimes does not.
• Use ignore() to optionally ignore pieces of workflow plan commands and/or imported functions. Use ignore(some_code) to
  1. Force drake to not track dependencies in some_code, and
  2. Ignore any changes in some_code when it comes to deciding which target are out of date.
• Force drake to only look for imports in environments inheriting from envir in make() (plus explicitly namespaced functions).
• Force loadd() to ignore foreign imports (imports not explicitly found in envir when make() last imported them).
• Reduce default verbosity. Only targets are printed out by default. Verbosity levels are integers ranging from 0 through 4.
• Change loadd() so that only targets (not imports) are loaded if the ... and list arguments are empty.
• Add check to drake_plan() to check for duplicate targets
• Add a .gitignore file containing "*" to the default .drake/ cache folder every time new_cache() is called. This means the cache will not be automatically committed to git. Users need to remove .gitignore file to allow unforced commits, and then subsequent make()s on the same cache will respect the user's wishes and not add another .gitignore. this only works for the default cache. Not supported for manual storrs.
• Add a new experimental "future" backend with a manual scheduler.
• Implement dplyr-style tidyselect functionality in loadd(), clean(), and build_times(). For build_times(), there is an API change: for tidyselect to work, we needed to insert a new ... argument as the first argument of build_times().
• Deprecate the single-quoting API for files. Users should now use formal API functions in their commands:
  • file_in() for file inputs to commands or imported functions (for imported functions, the input file needs to be an imported file, not a target).
  • file_out() for output file targets (ignored if used in imported functions).
  • knitr_in() for knitr/rmarkdown reports. This tells drake to look inside the source file for target dependencies in code chunks (explicitly referenced with loadd() and readd()). Treated as a file_in() if used in imported functions.
• Change drake_plan() so that it automatically fills in any target names that the user does not supply. Also, any file_out()s become the target names automatically (double-quoted internally).
• Make read_drake_plan() (rather than an empty drake_plan()) the default plan argument in all functions that accept a plan.
• Add support for active bindings: loadd(..., lazy = "bind"). That way, when you have a target loaded in one R session and hit make() in another R session, the target in your first session will automatically update.
• Use tibbles for workflow plan data frames and the output of dataframes_graph().
• Return warnings, errors, and other context of each build, all wrapped up with the usual metadata. diagnose() will take on the role of returning this metadata.
• Deprecate the read_drake_meta() function in favor of diagnose().
• Add a new expose_imports() function to optionally force drake detect deeply nested functions inside specific packages.
• Move the "quickstart.Rmd" vignette to "example-basic.Rmd". The so-called "quickstart" didn't end up being very quick, and it was all about the basic example anyway.
• Move drake_build() to be an exclusively user-side function.
• Add a replace argument to loadd() so that objects already in the user's environment need not be replaced.
• When the graph cyclic, print out all the cycles.
• Prune self-referential loops (and duplicate edges) from the workflow graph. That way, recursive functions are allowed.
• Add a seed argument to make(), drake_config(), and load_basic_example(). Also hard-code a default seed of 0. That way, the pseudo-randomness in projects should be reproducible across R sessions.
• Cache the pseudo-random seed at the time the project is created and use that seed to build targets until the cache is destroyed.
• Add a new drake_read_seed() function to read the seed from the cache. Its examples illustrate what drake is doing to try to ensure reproducible random numbers.
• Evaluate the quasiquotation operator !! for the ... argument to drake_plan(). Suppress this behavior using tidy_evaluation = FALSE or by passing in commands passed through the list argument.
• Preprocess workflow plan commands with rlang::expr() before evaluating them. That means you can use the quasiquotation operator !! in your commands, and make() will evaluate them according to the tidy evaluation paradigm.
• Restructure drake_example("basic"), drake_example("gsp"), and drake_example("packages") to demonstrate how to set up the files for serious drake projects. More guidance was needed in light of #193.
• Improve the examples of drake_plan() in the help file (?drake_plan).

Version 5.0.0

• Transfer drake to rOpenSci GitHub URL.
• Several functions now require an explicit config argument, which you can get from drake_config() or make(). Examples:
  • outdated()
  • missed()
  • rate_limiting_times()
  • predict_runtime()
  • vis_drake_graph()
  • dataframes_graph()
• Always process all the imports before building any targets. This is part of the solution to #168: if imports and targets are processed together, the full power of parallelism is taken away from the targets. Also, the way parallelism happens is now consistent for all parallel backends.
• Major speed improvement: dispense with internal inventories and rely on cache$exists() instead.
• Let the user define a trigger for each target to customize when make() decides to build targets.
• Document triggers and other debugging/testing tools in the new "debug" vignette.
• Restructure the internals of the storr cache in a way that is not back-compatible with projects from versions 4.4.0 and earlier. The main change is to make more intelligent use of storr namespaces, improving efficiency (both time and storage) and opening up possibilities for new features. If you attempt to run drake >= 5.0.0 on a project from drake <= 4.0.0, drake will stop you before any damage to the cache is done, and you will be instructed how to migrate your project to the new drake.
• Use formatR::tidy_source() instead of parse() in tidy_command() (originally tidy() in R/dependencies.R). Previously, drake was having problems with an edge case: as a command, the literal string "A" was interpreted as the symbol A after tidying. With tidy_source(), literal quoted strings stay literal quoted strings in commands. This may put some targets out of date in old projects, yet another loss of back compatibility in version 5.0.0.
• Speed up clean() by refactoring the cache inventory and using light parallelism.
• Implement rescue_cache(), exposed to the user and used in clean(). This function removes dangling orphaned files in the cache so that a broken cache can be cleaned and used in the usual ways once more.
• Change the default cpu and elapsed arguments of make() to NULL. This solves an elusive bug in how drake imposes timeouts.
• Allow users to set target-level timeouts (overall, cpu, and elapsed) with columns in the workflow plan data frame.
• Document timeouts and retries in the new "debug" vignette.
• Add a new graph argument to functions make(), outdated(), and missed().
• Export a new prune_graph() function for igraph objects.
• Delete long-deprecated functions prune() and status().
• Deprecate and rename functions:
  • analyses() => plan_analyses()
  • as_file() => as_drake_filename()
  • backend() => future::plan()
  • build_graph() => build_drake_graph()
  • check() => check_plan()
  • config() => drake_config()
  • evaluate() => evaluate_plan()
  • example_drake() => drake_example()
  • examples_drake() => drake_examples()
  • expand() => expand_plan()
  • gather() => gather_plan()
  • plan(), workflow(), workplan() => drake_plan()
  • plot_graph() => vis_drake_graph()
  • read_config() => read_drake_config()
  • read_graph() => read_drake_graph()
  • read_plan() => read_drake_plan()
  • render_graph() => render_drake_graph()
  • session() => drake_session()
  • summaries() => plan_summaries()
• Disallow output and code as names in the workflow plan data frame. Use target and command instead. This naming switch has been formally deprecated for several months prior.
• Deprecate the ..analysis.. and ..dataset.. wildcards in favor of analysis__ and dataset__, respectively. The new wildcards are stylistically better an pass linting checks.
• Add new functions drake_quotes(), drake_unquote(), and drake_strings() to remove the silly dependence on the eply package.
• Add a skip_safety_checks flag to make() and drake_config(). Increases speed.
• In sanitize_plan(), remove rows with blank targets "".
• Add a purge argument to clean() to optionally remove all target-level information.
• Add a namespace argument to cached() so users can inspect individual storr namespaces.
• Change verbose to numeric: 0 = print nothing, 1 = print progress on imports only, 2 = print everything.
• Add a new next_stage() function to report the targets to be made in the next parallelizable stage.
• Add a new session_info argument to make(). Apparently, sessionInfo() is a bottleneck for small make()s, so there is now an option to suppress it. This is mostly for the sake of speeding up unit tests.
• Add a new log_progress argument to make() to suppress progress logging. This increases storage efficiency and speeds some projects up a tiny bit.
• Add an optional namespace argument to loadd() and readd(). You can now load and read from non-default storr namespaces.
• Add drake_cache_log(), drake_cache_log_file(), and make(..., cache_log_file = TRUE) as options to track changes to targets/imports in the drake cache.
• Detect knitr code chunk dependencies in response to commands with rmarkdown::render(), not just knit().
• Add a new general best practices vignette to clear up misconceptions about how to use drake properly.

Version 4.4.0

• Extend plot_graph() to display subcomponents. Check out arguments from, mode, order, and subset. The graph visualization vignette has demonstrations.
• Add "future_lapply" parallelism: parallel backends supported by the future and future.batchtools packages. See ?backend for examples and the parallelism vignette for an introductory tutorial. More advanced instruction can be found in the future and future.batchtools packages themselves.
• Cache diagnostic information of targets that fail and retrieve diagnostic info with diagnose().
• Add an optional hook argument to make() to wrap around build(). That way, users can more easily control the side effects of distributed jobs. For example, to redirect error messages to a file in make(..., parallelism = "Makefile", jobs = 2, hook = my_hook), my_hook should be something like function(code){withr::with_message_sink("messages.txt", code)}.
• Remove console logging for "parLapply" parallelism. drake was previously using the outfile argument for PSOCK clusters to generate output that could not be caught by capture.output(). It was a hack that should have been removed before.
• Remove console logging for "parLapply" parallelism. drake was previously using the outfile argument for PSOCK clusters to generate output that could not be caught by capture.output(). It was a hack that should have been removed before.
• If 'verbose' is 'TRUE' and all targets are already up to date (nothing to build), then make() and outdated() print "All targets are already up to date" to the console.
• Add new examples in 'inst/examples', most of them demonstrating how to use the "future_lapply" backends.
• New support for timeouts and retries when it comes to building targets.
• Failed targets are now recorded during the build process. You can see them in plot_graph() and progress(). Also see the new failed() function, which is similar to in_progress().
• Speed up the overhead of parLapply parallelism. The downside to this fix is that drake has to be properly installed. It should not be loaded with devtools::load_all(). The speedup comes from lightening the first clusterExport() call in run_parLapply(). Previously, we exported every single individual drake function to all the workers, which created a bottleneck. Now, we just load drake itself in each of the workers, which works because build() and do_prework() are exported.
• Change default value of overwrite to FALSE in load_basic_example().
• Warn when overwriting an existing report.Rmd in load_basic_example().
• Tell the user the location of the cache using a console message. Happens on every call to get_cache(..., verbose = TRUE).
• Increase efficiency of internal preprocessing via lightly_parallelize() and lightly_parallelize_atomic(). Now, processing happens faster, and only over the unique values of a vector.
• Add a new make_with_config() function to do the work of make() on an existing internal configuration list from drake_config().
• Add a new function drake_batchtools_tmpl_file() to write a batchtools template file from one of the examples (drake_example()), if one exists.

Version 4.3.0: 2017-10-17

Version 4.3.0 has:

• Reproducible random numbers (#56)
• Automatic detection of knitr dependencies (#9)
• More vignettes
• Bug fixes

Version 4.2.0: 2017-09-29

Version 4.2.0 will be released today. There are several improvements to code style and performance. In addition, there are new features such as cache/hash externalization and runtime prediction. See the new storage and timing vignettes for details. This release has automated checks for back-compatibility with existing projects, and I also did manual back compatibility checks on serious projects.

Version 3.0.0: 2017-05-03

Version 3.0.0 is coming out. It manages environments more intelligently so that the behavior of make() is more consistent with evaluating your code in an interactive session.

Version 1.0.1: 2017-02-28

Version 1.0.1 is on CRAN! I'm already working on a massive update, though. 2.0.0 is cleaner and more powerful.