usethis 2.1.3

Modified a test to ensure that intermittent GitHub rate limiting does not lead to ungraceful failure on CRAN.

usethis 2.1.2

git_default_branch_rename() no longer errors on repos where README exists, but has no badge block.

git_default_branch_rediscover() prunes the defunct remote ref to the old default branch, e.g. origin/master.

Version 2.1.1 was never released. Version was advanced from 2.1.1 to 2.1.2 strictly for CRAN (re-)submission purposes.

usethis 2.1.0

Git default branch support

usethis has a more sophisticated understanding of the default branch and gains several functions to support default branch renaming.

• git_branch_default() has been renamed to git_default_branch(), to place
  it logically in the new family of functions. The old name still works, but
  that won't be true forever.
• git_default_branch() is much more diligent about figuring out the default
  branch. Instead of only consulting the local repo, now we integrate local info
  with the default branch reported by the upstream or origin remote, if
  applicable.
  • This is intended to surface the case where a project has renamed its default
    branch and the local repo needs sync up with that.
• git_default_branch_rediscover() is a new function that helps contributors
  update their local repo (and personal fork, if applicable) when a project/repo
  renames its default branch.
• git_default_branch_rename() is a new function that helps a repo owner
  rename the default branch (both on GitHub and locally).
• git_default_branch_configure() is a new function to set the new Git
  configuration option init.defaultBranch, which controls the name of the
  initial branch of new local repos.
• git_sitrep() exposes init.defaultBranch and surfaces the more
  sophisticated analysis of git_default_branch().

Other GitHub-related changes

• git_sitrep() and gh_token_help() try even harder to help people get on the
  happy path with respect to their GitHub PAT (#1400, #1413, #1488, #1489,
  #1497).

• The minimum version of gh has been bumped to help / force more people to
  upgrade to the gh version that supports current GitHub PAT formats
  (@ijlyttle, #1454).

• use_github_file() is a new function related to use_template(). Instead of
  starting from a local file, use_github_file() grabs the contents of an
  arbitrary file on GitHub that the user has permission to read. It supports
  targeting a specific branch, tag, or commit and can follow a symlink (#1407).
  use_github_file() now powers use_github_action() and friends.

• use_github_release() is much more diligent about using any information left
  behind by devtools::submit_cran() or devtools::release(). Specifically,
  this applies to determining which SHA is to be tagged in the release. And this
  SHA, in turn, determines the consulted versions of DESCRIPTION (for package
  version) and NEWS.md (for release notes) (#1380).

• use_release_issue() also takes bullets from release_questions(),
  for compatibility with devtools::release().

• git_vaccinate(), edit_git_ignore(), and git_sitrep() are more careful to
  consult, reveal, and set the core.excludesFile setting in user's Git
  configuration (#1461).

• use_github_action_check_full() has been removed. It's overkill for the
  majority of R packages, which are better off with use_github_actions() or
  use_github_action_check_standard() (#1490).

• use_github_pages() and use_pkgdown_github_pages() use a new method for
  creating an empty, orphan gh-pages branch. This is necessary due to new
  GitHub behaviour, where it has become essentially impossible to refer to the
  empty tree (#1472).

• use_github() can create repositories with "internal" visibility, a feature
  that exists within GitHub Enterprise products (#1505).

Package development

• use_readme_[r]?md() no longer includes CRAN installation instructions in the
  initial template; instead, we only include GitHub-based install instructions
  or otherwise prompt the user to update instructions (#1507).

• use_import_from() is a new function that puts @importFrom pkg fun
  directives into a package in a consistent location (@malcolmbarrett, #1377).

• DESCRIPTION files generated by usethis no longer include LazyData by
  default, as per new CRAN checks; instead, LazyData is now added the first
  time you use use_data() (@malcolmbarrett, #1404).

• use_tidy_eval() has been updated to reflect current recommendations for
  using (and therefore exposing) tidy eval in other packages (@lionel-, #1445).

• use_pkgdown() automatically uses Bootstrap 5 if the pkgdown version supports
  it (anticipated for pkgdown 2.0.0).

• use_lifecycle() now imports lifecycle::deprecated() (#1419).

• use_code_of_conduct() now requires a contact argument to supply contact
  details for reporting CoC violations (#1269).

• use_package() no longer guides the user on how to use a dependency when no
  change was made (@malcolmbarrett, #1384).

Aimed at the tidyverse team

These functions are exported for anyone to use, but are aimed primarily at the maintainers of tidyverse, r-lib, and tidymodels packages.

• use_tidy_dependencies() is a new function that sets up standard dependencies
  used by all tidyverse packages, except those that are designed to be
  dependency free (#1423).

• use_tidy_upkeep_issue() is a new function similar to use_release_issue()
  that creates a checklist-style issue to prompt various updates (#1416).

• use_tidy_release_test_env() has been deleted since we no longer recommend
  including test environments in cran-comments.md. There's no evidence that
  CRAN finds it useful, and it's annoying to keep up-to-date (#1365).

• use_tidy_github_labels() is the new name for use_tidy_labels() (#1430).

• use_tidy_github_actions() takes over for use_tidy_ci(), which is now
  deprecated.

User-level configuration

• "usethis.overwrite" is a new option. When set to TRUE, usethis overwrites
  an existing file without asking for user confirmation if the file is inside
  a Git repo. The normal Git workflow makes it easy to see and selectively
  accept/discard any proposed changes. This behaviour is strictly opt-in
  (#1424).

• Functions that provide code to load packages in your .Rprofile now use
  rlang::check_installed() to make sure the package is installed locally
  (@malcolmbarrett, #1398).

• edit_rstudio_prefs() and edit_rstudio_snippets() should work now on
  case-sensitive OSes, due to a path fix re: the location of RStudio's config
  files (@charliejhadley, #1420).

usethis 2.0.1

• All functions that require a package now ask you if you'd like to install it.

• Added edit_template() for opening and creating files in inst/templates
  (for use with use_template()) (@malcolmbarrett, #1319).

• use_article() now creates the file in the vignettes/articles/ (#548).

• use_lifecycle() has been updated for changes in our lifecycle workflow
  (#1323).

• use_tidy_pkgdown() has been renamed to use_pkgdown_github_pages() since
  the function is useful for anyone who wants to automatically publish to GitHub
  pages, not just the tidyverse team (#1308).

• use_release_issue() includes a bunch of minor improvements. Most
  importantly, for initial CRAN release we now include a number of common
  things that CRAN checks for that aren't in R CMD check.

• use_readme_rmd(), use_readme_md(), use_tidy_contributing(), and
  use_tidy_support() use updated logic for determining the OWNER/REPO spec
  of the target repo (#1312).

usethis 2.0.0

Adoption of gert and changes to Git/GitHub credential handling

Usethis has various functions that help with Git-related tasks, which break down into two categories:

1. Git tasks, such as clone, push, and pull. These are things you could do with
   command line Git.
2. GitHub tasks, such as fork, release, and open an issue or pull request. These
   are things you could do in the browser or with the GitHub API.

We've switched from git2r to the gert package for Git operations (https://docs.ropensci.org/gert/). We continue to use the gh package for GitHub API work (https://gh.r-lib.org).

The big news in this area is that these lower-level dependencies are getting better at finding Git credentials, finding the same credentials as command line Git (and, therefore, the same as RStudio), and finding the same credentials as each other. This allows usethis to shed some of the workarounds we have needed in the past, to serve as a remedial "credential valet".

Under the hood, both gert and gh are now consulting your local Git credential store, when they need credentials. At the time of writing, they are using two different even-lower-level packages to do this:

• gert uses the credentials package (https://docs.ropensci.org/credentials/)
• gh uses the gitcreds package (https://gitcreds.r-lib.org/)

Even now, gert and gh should discover the same credentials, at least for github.com. In the future, these two packages may merge into one.

Git/GitHub credential management is covered in a new article:
Managing Git(Hub) Credentials

The main user-facing changes in usethis are:

• usethis should discover and use the same credentials as command line Git.
• usethis should be able to work with any GitHub deployment. While github.com is the default, GitHub Enterprise deployments are fully supported. The target GitHub host is determined from the current project's configured GitHub remotes, whenever possible.

As a result, several functions are deprecated and several other functions have some deprecated arguments.

• Deprecated functions:
  • use_git_credentials()
  • git_credentials()
  • github_token()
• Functions with (deprecated arguments):
  • create_from_github() (auth_token, credentials)
  • use_github() (auth_token, credentials)
  • use_github_links() (host, auth_token)
  • use_github_labels() (repo_spec, host, auth_token)
  • use_tidy_labels() (repo_spec, host, auth_token)
  • use_github_release() (host, auth_token)

The switch to gert + credentials should eliminate most credential-finding fiascos. Gert also takes a different approach to wrapping libgit2, the underlying C library that does Git operations. The result is more consistent support for SSH and TLS, across all operating systems, without requiring special effort at install time. More users should enjoy Git remote operations that "just work", for both SSH and HTTPS remotes. There should be fewer "unsupported protocol" errors.

GitHub remote configuration

Usethis gains a more formal framework for characterizing a GitHub remote configuration. We look at:

• Which GitHub repositories origin and upstream point to
• Whether you can push to them
• How they relate to each other, e.g. fork-parent relationship

This is an internal matter, but users will notice that usethis is more clear about which configurations are supported by various functions and which are not. The most common configurations are reviewed in a section of Happy Git.

When working in a fork, there is sometimes a question whether to target the fork or its parent repository. For example, use_github_links() adds GitHub links to the URL and BugReports fields of DESCRIPTION. If someone calls use_github_links() when working in a fork, they probably want those links to refer to the parent or source repo, not to their fork, because the user is probably preparing a pull request. Usethis should now have better default behaviour in these situations and, in some cases, will present an interactive choice.

Default branch

There is increasing interest in making the name of a repo's default branch configurable. Specifically, main is emerging as a popular alternative to master. Usethis now discovers the current repo's default branch and uses that everywhere that, previously, we had hard-wired master.

git_branch_default() is a newly exported function that is also what's used internally.

use_course(), use_zip(), and create_download_url() all have some support for forming the URL to download a .zip archive of a repo, based on a repo specification (e.g. OWNER/REPO) or a browser URL. These helpers now form a URL that targets HEAD of the repo, i.e. the default branch.

Changes to Git/GitHub functionality

The default Git protocol is now "https" and we no longer provide an interactive choice, by default, in interactive sessions. As always, a user can express a preference for "ssh" in individual function calls, for an R session via use_git_protocol(), and for all R sessions via the usethis.protocol option (#1262).

pr_resume() is a new function for resuming work on an existing local PR branch. It can be called argument-less, to select a branch interactively.

pr_fetch() can also be called with no arguments, to select a PR interactively.
The owner argument is replaced by target, with a choice of the source (default) or primary repo.

pr_forget() is a new function for abandoning a PR you initiated locally or fetched from GitHub. It only does local clean up and, for example, doesn't delete a remote branch or close a PR (#1263).

pr_view() can now be called with no arguments. If the current branch is associated with an open PR, we target that and, otherwise, we offer an interactive selection.

pr_finish() deletes the remote PR branch if the PR has been merged and the current user has the power to do so, i.e. an external contributor deleting their own branch or a maintainer deleting a branch associated with an internal PR (#1150). It no longer errors if the PR branch has already been deleted (#1196).

pr_pull_upstream() is renamed to pr_merge_main() to emphasize that it merges the main line of development into the current branch, where the main line of development is taken to mean the default branch, as reported by git_branch_default(), of the source repo, which could be either upstream or origin, depending on the situation.

create_from_github() will only create a read-only clone, due to lack of a GitHub personal access token, if explicitly directed to do so via fork = FALSE.

create_from_github() and use_tidy_thanks() accept browser and Git URLs as the repo_spec argument, to be friendlier to copy/paste. When a URL is passed, the host is also extracted from it.

create_github_token() is a new name for the function previously known as browse_github_token() and browse_github_pat().

issue_close_community() and issue_reprex_needed() are two new functions for maintainers who process lots of GitHub issues. They automate canned replies and actions, e.g. labelling or closing (#940).

GitHub Actions is the preferred platform for continuous integration, because that is what the tidyverse team currently uses and maintains. Functions related to Travis-CI and AppVeyor are soft-deprecated to raise awareness about this change and to make it clear that, if substantial maintenance becomes necessary, we may elect to retire the function (#1169).

browse_github_actions() is a new function to open the Actions page of the respective repo on GitHub, similar to existing browse_*() functions (@pat-s, #1102).

use_github_pages() is a new function to activate or reconfigure the GitHub Pages site associated with a repository (#224).

use_tidy_pkgdown() implements the complete pkgdown configuration used by the tidyverse team (#224).

pr_sync() is defunct and can be replicated by calling pr_pull(), pr_merge_main(), then pr_push().

Licensing improvements

All use_*_license() functions now work for projects, not just packages.

use_apl2_license() (not use_apache_license()) and use_gpl3_license() no longer modify the license text (#1198).

use_mit_license() now sets the default copyright holder to "{package} authors". This makes it more clear that the copyright holders are the contributors to the package; unless you are using a CLA there is no one copyright holder of a package (#1207).

New use_gpl_license() and use_agpl_license() make it easier to pick specific versions of the GPL and AGPL licenses, and to choose whether or not you include future versions of the license. Both default to version 3 (and above).

New use_proprietary_license() allows your package to pass R CMD check while making it clear that your code is not open source (#1163). Thanks to @atheriel for the blog post suggesting the wording: https://unconj.ca/blog/copyright-in-closed-source-r-packages-the-right-way.html

use_lgpl_license() now uses version 3 (and above), and gains new version and include_future argument to control which version is used.

use_gpl3_license(), use_agpl3_license() and use_apl2_license() have been deprecated in favour of the new version argument to use_gpl_license(), use_agpl_license() and use_apache_license().

The name argument to use_mit_license() has been changed to copyright_holder to make the purpose more clear. The name argument has been removed from all other license functions because it is not needed; no other license makes an assertion about who the copyright holder is.

RStudio preferences

usethis is now fully cognizant of the [changes to RStudio preferences](https://blog.rstud...

usethis 1.6.3

Patch release to refactor usage of withr in the tests for forward compatibility with an upcoming withr release. All changes are within the usethis tests.

usethis 1.6.1

Patch release to align some path handling internals with an update coming in the fs package.

• use_github_links() is a bit more clever about remotes (e.g. origin
  vs. upstream), which makes it easier to make a PR that adds GitHub links for
  a package you've forked.

• use_pkgdown() now .gitignores the destination directory and only adds the
  destination directory to the config file if it departs from the default
  (which is docs/).

• use_tidy_ci() is now deprecated in favour of use_tidy_github_actions()
  (#1098).

• use_github_action_check_standard() is a new intermediate workflow that
  checks on more platforms than _release, but is less exhaustive than _full
  (@jimhester).

• create_tidy_package() now uses an MIT license (@topepo, #1096).

usethis 1.6.0

GitHub actions

• New use_github_actions(), use_github_action_check_release(),
  use_github_action_check_full(), use_github_action_pr_commands(),
  to set up a GitHub Actions for a package (@jimhester).

• We now recommend GitHub Actions instead of Travis-CI or AppVeyor, and strongly
  recommend upgrading your packages.

• Fix use_github_action() URL parameter to ensure custom URLs are allowed.
  (@coatless, #1065).

Package creation

• create_package() gains a roxygen argument. If TRUE (the default),
  it adds a RoxygenNote field to the DESCRIPTION (which means the first run
  of devtools::check() will re-document the package, #963), and creates an
  empty NAMESPACE (which means you'll always need an explicit @export
  if you want to export functions, #927). It also turns markdown processing
  on by default (#911).

• use_rstudio() now sets the LineEndingConversion to Posix so that
  packages created using usethis always use LF line endings, regardless of
  who contributes to them (#1002).

• In the usethis.description option, you can now set Authors@R = person()
  directly, without having to wrap in additional layer of quotes. If setting
  this in your .Rprofile, you'll need to use utils::person() since the utils
  package isn't loaded until after your profile is executed.

PR helpers

• A new article Pull request helpers
  demonstrates how to use the pr_*() functions (@mine-cetinkaya-rundel, #802).

• pr_finish() checks that you don't have any local changes (#805), and can
  optionally finish any PR, not just the current (#1040).

• pr_pause() and pr_fetch() now automatically pull to get latest changes
  (#959, #960) and refresh RStudio's git pane (#706).

• pr_push() now works for a repository with no open pull requests
  (@maurolepore, #990).

• pr_pull() gives more information about which files have merge conflicts
  and automatically opens conflicted files for editing (#1056).

Other new features

• New rename_files() makes it easy to rename paired R/ and test/ files
  (#784).

• New ui_silence() makes it easier to selectively silence some UI output.

• New use_agpl3_license() (@pachamaltese, #870).

• New use_data_table() to set up a package for Import-ing data.table
  (@MichaelChirico, #897).

• use_latest_dependencies() replaces use_tidy_version() as the new name
  better reflect its usage (#771).

• New use_lifecycle() helper to import the lifecycle badges for functions and
  arguments in your package. Learn more at https://lifecycle.r-lib.org/.

• use_release_issuue() will include additional bullets if your package
  includes release_bullets() function which returns a character
  vector (and the package has been loaded with load_all()) (#941).

Minor improvements and bug fixes

• When writing files, usethis now respects line endings. Default line endings
  are taken from the .Rproj file (if available), otherwise the DESCRIPTION,
  otherwise the first file found in R/, then all else failing to your
  platform default (#767). It should do a better job of preserving UTF-8 files
  on windows (#969).

• browse_github() now always goes to the canonical GitHub site:
  https://github.com/user/repo. This is slightly worse than the current
  behaviour but makes the function more consistent across packages, and
  considerably simplifies the implementation.

• browse_circle() opens the project dashboard on Circle CI.

• create_download_url() is a new helper for making "ZIP file download"
  URLs suitable for use with use_course() and use_zip(), starting with the
  URLs that mere mortals can usually get their hands on in a browser
  (@fmichonneau, #406).

• create_package() no longer fails partway through if you have a malformed
  usethis.description option (#961).

• create_package() will now create a package in a symlink to a directory
  (#794).

• create_package() and use_description() gain a check_name argument to
  control whether to check for package names invalid for CRAN (@noamross, #883).

• edit_file() and use_test() gain an open parameter that allows you to
  control whether or not the function is opened for editing by the user (#817).

• edit_rstudio_snippets() makes it more clear which snippet types are
  allowed and that user's snippets mask the built-in snippets (@GegznaV, #885).

• git_sitrep() now reports project-specific user name and email, if set
  (#837), and email(s) associated with your GitHub account (@dragosmg, #724).

• ui_yeah() and ui_nope() allow you to override the default "yes" and
  "no" strings and to opt-out of shuffling (@rundel, #796).

• use_circleci() uses correct delimiters in template (@jdblischak, #835).

• use_circleci_badge() is now exported (@pat-s, #920).

• use_code_of_conduct() now generates an absolute link to code of conduct on
  pkgdown website or original source to avoid R CMD check issues (#772).

• use_course() and use_zip() are now equipped with some retry capability,
  to cope with intermittent failure or the need for a longer connect timeout
  (#988).

• use_data() automatically bumps R dependency to 2.10 (#962).

• use_data_raw() template quotes the dataset name correctly
  (#736, @mitchelloharawild).

• use_description_defaults() now shows the default fields combined with
  any options that you have set.

• use_dev_package() now supports packages installed from any remote type,
  not just GitHub (@antoine-sachet, #1071).

• use_git() will now create initial commit if needed (#852).

• use_github_release() no longer fails if you have no news bullets (#1048).

• use_github_release() now tags the latest local commit instead of the latest
  remote commit on the default branch (@davidchall, #1029).

• use_gpl3_license() now completes the license by providing additional
  information in a file named LICENSE, just like use_mit_license() and
  friends (@Cervangirard, #683).

• use_logo() now generates the correct href if the pkgdown url is set
  (@mitchelloharawild, #986).

• use_make() gains missing closing parenthesis (@ryapric, #804).

• use_markdown_template() no longer uses an unexported function in its
  default arguments (@fmichonneau, #761).

• use_testthat() and use_test() now work in projects, not just packages
  (#1017).

• use_test() works on Windows when called without arguments (#901).

• use_tidy_issue_template() uses current github format (@Maschette, #756).

• use_travis(), use_travis_badge(), and browse_travis(), now default
  to ext = "com" since travis-ci.com is now recommended it over travis-ci.org
  (@riccardoporreca, #1038).

• use_release_issue() reminds you to re-generate README.md,
  if needed (#767).

• use_r() and use_test() throw a clear error if multiple names are provided
  (@strboul, #862).

• use_rcpp() and use_c() now ensure src/ contains at least one .cpp or
  .c placeholder file, so that the package can be built (@coatless, #720).

• usethis.destdir is a new option that is consulted when deciding where to
  put a new folder created by use_course() or create_from_github()
  (@malcolmbarrett, #1015).

Dependency changes

New Imports: cli, rematch2, rlang.

gh minimum version is bumped to v.1.1.0, due to changed behaviour around requests that return nothing.

clisymbols is removed from Imports.

usethis 1.5.1

This is a patch release with various small features and bug fixes.

Using the pipe %>% or the tidy eval toolkit in your package

• The templates used by use_pipe() and use_tidy_eval() use a more robust
  form of cross-reference links, linking to files rather than topics. This
  should silence some warnings seen on Windows at install time
  (#730, #731 @jmgirard).

• use_pipe() gains a logical export argument, so it can do the setup
  necessary to use the pipe operator when it is re-exported
  (export = TRUE, which is the default and preserves the previous behaviour)
  and when it is not (export = FALSE) (#783).

Git, GitHub, and pull requests

• use_github() removes newline \n characters from the description that
  can cause the initial push to fail (#493, @muschellij2).

• git_sitrep() gives better feedback if we can't validate the GitHub PAT
  (#725, @ijlyttle).

• create_from_github() sets remote tracking branch of master to
  upstream/master, when it creates (and clones) a fork (#792).

• pr_pause() can switch back to master even if there is no remote tracking
  branch (#715, @cderv).

Build tools and continuous integration

• use_tidy_ci() is updated for R 3.6, meaning that R 3.2 is the oldest version
  of R supported through proactive testing.

• use_make() and use_jenkins() add a Makefile and Jenkinsfile, respectively
  (#501, @ryapric).

• use_circleci() creates a .circleci/config.yaml config file for CircleCI
  (#703, @jdblischak).

Other

• use_zip() is a new variant of use_course() that downloads and unpacks a
  ZIP file, with less pedantic behaviour re: the destination directory. Both
  functions now also work for ZIP files with MIME type
  "application/x-zip-compressed" (#573).

• use_version() can detect "(development version)" in a NEWS header and
  update it with an actual version (#768, @DavisVaughan).

Dependency changes

R 3.1 is no longer explicitly supported or tested. Our general practice is to support the current release (3.6, at time of writing), devel, and the 4 previous versions of R (3.5, 3.4, 3.3, 3.2).

fs minimum version is stated to be v1.3.0.

glue minimum version is stated to be v1.3.0.

usethis 1.5.0

Git, GitHub (and GitLab)

usethis gains several functions to inspect and manipulate the Git situation for the current project = repository. We also provide more control and visibility
into git2r's workings, especially around credentials (usethis uses git2r for all
Git operations).

• git_sitrep() lets you know what's up with your Git, git2r and GitHub
  config (#328).

• git_vaccinate() vaccinates your global (i.e. user-level) git ignore file.
  It adds standard entries for R users, such as .Rhistory and .Rdata. This
  decreases the chance that you commit and push files containing confidential
  information (#469).

• git_remotes() and use_git_remote() are new helpers to inspect or modify
  Git remote URLs for the repo associated with the active project (#649).

• git_protocol() + use_git_protocol() and git_credentials() +
  use_git_credentials() are new helpers to summon or set Git transport
  protocol (SSH or HTTPS) or git2r credentials, respectively. These functions
  are primarily for internal use. Most users can rely on default behaviour. Use
  these helpers to intervene if git2r isn't discovering the right credentials
  (#653). usethis honors the usethis.protocol option, which allows you to
  express a general preference for SSH vs. HTTPS.

Other improvements and bug fixes:

• use_github() tries harder but also fails earlier, with more informative
  messages, making it less likely to leave the repo partially configured (#221).

• use_github() and create_from_github() gain a protocol argument
  (#494, @cderv).

• create_from_github() pulls from upstream master in a fork (#695, @ijlyttle).

• use_release_issue() creates a GitHub issue containing a release checklist,
  reflecting the standard practices of the tidyverse team (#338).

• use_github_release() creates a draft GitHub release using the entries in
  NEWS.md (#137).

• use_gitlab_ci() creates a gitlab-ci.yaml config file for GitLab CI
  (#565, @overmar).

• use_git_config() now invisibly returns the previous values of the
  settings.

• use_github_labels() has been rewritten be more flexible. You can now supply
  a repo name, and descriptions, and you can set colours/descriptions
  independently of creating labels. You can also rename existing labels
  (#290).

GitHub pull requests

We've added experimental functions to work with GitHub pull requests. They
are aimed at both a maintainer (who may make, review, and modify pull
requests) and a contributor (who may make or explore pull requests).

• git_sitrep() includes a section at the end aimed at describing "pull request
  readiness". Expect that to develop and expand.

• pr_init(), pr_fetch(), pr_push(), pr_pull(), pr_finish(), and
  pr_view() constitute the new family of helpers. They are designed to be
  smart about the significance of remotes with the standard names of origin
  and upstream and to facilitate both internal and external pull requests.

Partial file management

usethis gains tooling to manage part of a file. This is currently used for
managing badges in your README and roxygen import tags:

• use_badge() and friends now automatically add badges if your README
  contains a specially formatted badge block (#497):

  <-- badge:start --> 
  <-- badge:end --> 
  

• use_tibble() and use_rcpp() automatically add roxygen tags to
  to {package}-package.R if it contains a specially formatted namespace
  block (#517):

  ## usethis namespace: start 
  ## usethis namespace: end 
  NULL 

  Unfortunately this means that use_rcpp() no longer supports non-roxygen2
  workflows, but I suspect the set of people who use usethis and Rcpp but
  not roxygen2 is very small.

Extending and wrapping usethis

• New proj_activate() lets you activate a project, either opening a new
  RStudio session (if you use RStudio) or changing the working directory
  (#511).

• proj_get() and proj_set() no longer have a quiet argument. The
  user-facing message about setting a project is now under the same control
  as other messages, i.e. getOption("usethis.quiet", default = FALSE) (#441).

• A new set of ui_*() functions makes it possible to give your own code
  the same user interface as usethis (#308). All use the glue and crayon and
  packages to power easy interpolation and formatting. There are four families
  of functions:

  • block styles: ui_line(), ui_done(), ui_todo(), ui_oops(),
    ui_info().
  • conditions: ui_stop(), ui_warn().
  • questions: ui_yeah(), ui_nope().
  • inline styles: ui_field(), ui_value(), ui_path(), ui_code().

• with_project() and local_project() are new withr-style functions to
  temporarily set an active usethis project. They make usethis functions easier
  to use in an ad hoc fashion or from another package (#441).

Tidyverse standards

These standards are (aspirationally) used by all tidyverse packages; you are
welcome to use them if you find them helpful.

• Call use_tidy_labels() to update GitHub labels. Colours are less
  saturated, docs is now documentation, we use some emoji, and performance is
  no longer automatically added to all repos (#519). Repo specific issues
  should be given colour #eeeeee and have an emoji.

• Call use_logo() to update the package logo to the latest specifications:
  man/figure/logo.png should be 240 x 278, and README should contain
  <img src="man/figures/logo.png" align="right" height="139" />.
  This gives a nicer display on retina displays. The logo is also linked to the
  pkgdown site if available (#536).

• When creating a new package, use create_tidy_package() to start with a
  package following the tidyverse standards (#461).

• NEWS.md for the development version should use "(development version)"
  rather than the specific version (#440).

• pkgdown sites should now be built by travis and deployed automatically to
  GitHub pages. use_pkgdown_travis() will help you set that up.

• When starting the release process, call use_release_issue() to create a
  release checklist issue (#338).

• Prior to CRAN submission call use_tidy_release_test_env() to update the
  test environment section in cran-comments() (#496).

• After acceptance, try use_github_release() to automatically create a
  release. It's created as a draft so you have a chance to look over before
  publishing.

• use_vignette() includes the a standard initialisation chunk with
  knitr::opts_chunk$set(comment = "#>", collapse = TRUE) which should
  be used for all Rmds.

New functions not already mentioned

• use_devtools() (#624), use_conflicted() (#362), and use_reprex() (#465)
  help add useful packages to your .Rprofile.

• use_partial_warnings() helps the user add a standard warning block to
  .Rprofile (#64).

• edit_r_buildignore() opens .Rbuildignore for manual editing
  (#462, @bfgray3).

• use_lgpl_license() automates set up of the LGL license (#448, @krlmlr).

• use_ccby_license() adds a CCBY 4.0 license (#547, @njtierney).

• use_rcpp_armadillo() and use_rcpp_eigen() set up a package to use
  RcppArmadillo or RcppEigen, respectively (#421, @coatless, @duckmayr).

• use_c("foo") sets up src/ and creates src/foo.c (#117).

• use_covr_ignore() makes it easy to ignore files in test coverage (#434).

• use_pkgdown_travis() helps you set up pkgdown for automatic build-and-deploy
  from Travis-CI to GitHub Pages (#524).

• use_addin() does setup for RStudio addins (#353, @haozhu233).

• use_tutorial() creates a new interactive R Markdown tutorial, as implemented
  by the learnr package
  (@angela-li, #645).

• use_article() creates articles, vignettes that are automatically added to
  .Rbuildignore. These appear on pkgdown sites, but are not included with the
  package itself (#281).

• use_citation() creates a basic CITATION template and puts it in the
  right place (#100).

Other minor bug fixes and improvements

• write_union appends the novel lines, but does not remove duplicates from
  existing lines (#583, @khailper).

• use_rcpp("foo") now creates src/foo.cpp (#117).

• use_data() gains a version argument and defaults to serialization format
  version 2 (#675).

• use_data_raw() accepts a name for the to-be-prepared dataset and opens a
  templated R script (#646).

• browse_github() now falls back to CRAN organisation (with a warning) if
  package doesn't have its own GitHub repo (#186).

• create_*() restore the active project if they error part way through,
  and use proj_activate() (#453, #511).

• edit_r_profile() and edit_r_environ() now respect environment variables
  R_PROFILE_USER and R_ENVIRON_USER, respectively (#480).

• use_description() once again prints the generated description (#287).

• use_description_field() is no longer sensitive to whitespace, which
  allows use_vignette() to work even if the VignetteBuilder field is
  spread over multiple lines (#439).

• use_logo() can override existing logo if user gives permission (#454).
  It also produces retina appropriate logos by default, and matches the
  aspect ratio to the http://hexb.in/sticker.html specification (#499).

• use_news_md() will optionally commit.

• use_package() gains a min_version argument to specify a minimum
  version re...