Google Cloud Storage, mermaid.js static graphs, and error = "null"

targets 0.11.0

Bug fixes

• Print out the relevant target names if targets have conflicting names.
• Catch all the target warnings instead of just reporting the last one.
• Allow 200 group URL status codes instead of just 200 (#797, @petrbouchal).

New features

• Add Google Cloud Storage via tar_target(..., repository = "gcp") (#720, @MarkEdmondson1234). Special thanks to @MarkEdmondson1234 for the cloud storage utilities in R/utils_gcp.R
• mermaid.js static graphs with tar_mermaid() (#775, @yonicd).
• Implement tar_target(..., error = "null")to allow errored targets to return NULL and continue (#807, @zoews). Errors are still registered, those targets are not up to date, and downstream targets have an easier time continuing on.
• Implement tar_assert_finite().
• tar_destroy(), tar_delete(), and tar_prune() now attempt to delete cloud data for the appropriate targets (#799). In addition, tar_exist_objects() and tar_objects() now report about target data in the cloud when applicable. Add a new cloud argument to each function to optionally suppress this new behavior.
• Add a zoom_speed argument to tar_visnetwork() and tar_glimpse() (#749, @dipterix).
• Report the total runtime of the pipeline in the "verbose", "verbose_positives", "timestamp", and "timesamp_positives" reporters.

Enhancements

• Allow target name character strings to have attributes (#758, @psanker).
• Sort metadata rows when the pipeline finishes so that version-controlling the metadata is easier (#766, @jameelalsalam).

Deprecations

• Deprecate the "aws_*" storage format values in favor of a new repository argument (#803). In other words, tar_target(..., format = "aws_qs") is now tar_target(..., format = "qs", repository = "aws"). And internally, storage classes with multiple inheritance are created dynamically as opposed to having hard-coded source files. All this paves the way to add new cloud storage platforms without combinatorial chaos.