2018.7.1:
 - All calls to `pipenv shell` are now implemented from the ground up using `shellingham`,
   a custom library which was purpose built to handle edge cases and shell detection.
 - Added support for python 3.7 via a few small compatibility / bugfixes.
 - Added new flag `pipenv --support` to replace the diagnostic command `python -m
   pipenv.help`.
 - Improved import times and CLI runtimes with minor tweaks.
 - Fixed an ongoing bug which sometimes resolved incompatible versions into lockfiles.
 - Fixed a bug which caused errors when creating virtualenvs which contained leading dash
   characters.
 - Fixed a logic error which caused `--deploy --system` to overwrite editable vcs packages
   in the pipfile before installing, which caused any installation to fail by default.
 - Installed new vendored jinja2 templates for `click-completion` which were causing
   template errors for users with completion enabled.
 - Pipenv will now ensure that its internal package names registry files are written with
   unicode strings.
 - Fixed a bug causing requirements input as relative paths to be output as absolute paths
   or URIs.
 - Fixed a bug affecting normalization of `git+git@host` uris.
 - Pipenv will now always use `pathlib2` for `Path` based filesystem interactions by
   default on `python<3.5`.
 - Fixed a bug which prevented passing proxy PyPI indexes set with `--pypi-mirror` from
   being passed to pip during virtualenv creation, which could cause the creation to
   freeze in some cases.
 - Using the `python -m pipenv.help` command will now use proper encoding for the host
   filesystem to avoid encoding issues.
 - The new `jinja2` templates for `click_completion` will now be included in pipenv source
   distributions.
 - Resolved a long-standing issue with re-using previously generated `InstallRequirement`
   objects for resolution which could cause `PKG-INFO` file information to be deleted,
   raising a `TypeError`.
 - Resolved an issue parsing usernames from private PyPI URIs in `Pipfiles` by updating
   `requirementslib`.
 - Updated requirementslib to fix an issue with properly quoting markers in VCS requirements.
 - Add patch to `prettytoml` to support Python 3.7.
 - Patched `prettytoml.AbstractTable._enumerate_items` to handle `StopIteration` errors in
   preparation of release of python 3.7.
 - Fixed an issue reading package names from `setup.py` files in projects which imported
   utilities such as `versioneer`.
 - Updated `requirementslib` to version `1.0.9`
 - Unraveled a lot of old, unnecessary patches to `pip-tools` which were causing
   non-deterministic resolution errors.
2018.6.25:
 - Added error handling functionality to properly cope with single-digit `Requires-Python`
   metadata with no specifiers.
 - Pipenv will now generate hashes much more quickly by resolving them in a single pass
   during locking.
 - `pipenv run` will now avoid spawning additional `COMSPEC` instances to run commands in
   when possible.
 - `pipenv check` now may take multiple of the additional argument `--ignore` which takes
   a parameter `cve_id` for the purpose of ignoring specific CVEs.
 - Patched `python-dotenv` to ensure that environment variables always get encoded to the
   filesystem encoding.
 - Virtualenv names will now appear in prompts for most Windows users.
 - Resolver runtime and caching has been improved.
 - Improved virtualenv discovery when using `pipenv --venv`.
 - Improved error messages when failing to activate virtualenvs.
 - Dependency resolver reliability has been improved.
 - Added nested JSON output to the `pipenv graph` command.
 - Added support for mounted drives via UNC paths.
 - Added support for Windows Subsystem for Linux bash shell detection.
 - Added custom shell detection library `shellingham`, a port of our changes to `pew`.
 - Requirements are only auto-imported in new projects created without passing any packages
   to install and without an initial Pipfile.
 - Added support for cmder shell paths with spaces.
 - Dropped vendored pip 9 and vendor, patch, and migrate to pip 10.
 - Virtualenv activation lines will now avoid being written to some shell history files.
 - Pipenv-created virtualenvs will now be associated with a `.project` folder (features can
   be implemented on top of this later or users may choose to use `pipenv-pipes` to take
   full advantage of this.)
 - Lock and update VCS dependencies properly by checking them out and cloning them
   manually before installing and generating a lockfile to guarantee dependencies are
   locked.
 - PyPI mirror URLs can now be set to override instances of PyPI urls by passing the
   `--pypi-mirror` argument from the command line or setting the `PIPENV_PYPI_MIRROR`
   environment variable.
 - Locking will now pin the correct VCS ref during `pipenv update` runs.
 - Running `pipenv update` with a new vcs ref specified in the `Pipfile` will now properly
   obtain, resolve, and install the specified dependency at the specified ref.
 - Pipenv will now parse & capitalize`platform_python_implementation` markers -- **note** this
   could cause an issue if you have an out of date Pipfile which lowercases the comparison
   value (e.g. `cpython` instead of `CPython`).
 - Massive internal improvements to requirements parsing codebase, resolver, and error
   messaging.
 - Fixed a regression which led to direct invocations of `virtualenv`, rather than calling
   it by module.
 - Resolution bugs causing packages for incompatible python versions to be locked
   have been fixed.
 - VCS dependencies are now manually obtained only if they do not match the requested ref.
 - Windows executable discovery now leverages `os.pathext`.
 - Pipenv will now correctly unquote special characters in wheel URIs.
 - Fixed a bug with parsing and grouping old-style setup.py extras during resolution.
 - Fixed a bug which caused `--system` to incorrectly abort when users were in a virtualenv.
 - Pipenv clean will now ignore comments when cleaning the environment.
 - Fixed a bug which caused `--deploy --system` to inadvertently create a virtualenv
   before failing.
 - Errors when running `pipenv graph` running against empty or non-existent environments.
   will now contain helpful information.
 - Removed vendored `cacert.pem` which could cause issues for some users with custom
   certificate settings.
 - Updated requirementslib to fix a bug in pipfile parsing affecting relative path conversions on Windows.
 - Fixed a bug causing pipenv graph to fail to display sometimes.
2018.05.12:
 - Switch to calver for versioning.
11.10.4:
 - Bugfix release (_mkstmp_inner backport breaks python3.4/3.5 compat)
11.10.3:
 - Bugfix release (break dependency on pathlib2).
11.10.2:
 - Backport NamedTemporaryFile for python 2.
 - Implement atomic lockfile writing / rewriting.
 - Allow non-interactive pyenv installations for CI.
 - Bugfix regression which restricted pipfiles to two sources.
 - Update default python 2.7 version to 2.7.15.
 - Fix bug preventing usage within premade virtualenvs.
 - Add PIPENV_MAX_RETRIES environment variable to allow retrying installs.
 - Fix regression with `pipenv sync` which caused it to lock if out of sync.
 - Update colorblind mode to respect progress bars.
 - Use `\n` to generate new lockfiles and pipfiles, default to current newlines.
 - Fix bug with environment variable expansion writing back to Pipfiles when
   running `pipenv install <package>`
 - Accurately parse extras from egg fragments.
 - Allow `editable=False` in pipfile.
 - Fix `keep-outdated` argument for installation (previously unenforced).
 - Update vendoring scripts to include licenses for vendored pip.
11.10.1:
 - Fix broken resolution when using multiple sources in pipfiles and passing
   `--skip-lock`.
 - Include all sources in `pipenv lock -r` output as `--extra-index-url` args.
 - Translate index aliases to index urls from pipfile or lockfile.
 - Fix virtualenv detection for .venv folders in project directories.
 - Add LICENSE files for all vendored dependencies.
 - Port automated tooling from pip for re-vendoring and downloading licenses
    (thanks @hroncok @uranusjr and @ncoghlan for your help sorting this out).
 - Remove GPL'ed code.
 - Make imports lazy to improve initial load time.
 - Extra path searching for python at runtime.
 - Shellquote paths to requirement files in case of spaces on windows.
 - Update PyPI urls.
 - Require `--python` values to exist when passing a path.
 - Bugfix for environment variable expansion in 'unlocked' pipfiles.
 - Bugfix for `--deploy` flag.
 - Bugfix for windows virtualenv drive letter case normalization.
 - Bugfix for python version number parsing.
 - Improved error messaging.
11.10.0:
 - Resolve editable packages on the local filesystem.
 - Ensure lock hash does not change based on injected env vars.
 - Fix bug in detecting .venv at project root when in subdirectories.
 - Parse quoting in [scripts] section correctly + clearer run errors.
 - Fix bug resolving & locking markers correctly.
 - Fix locking failure for packages not available on the default PyPI.
 - Upgrade python-dotenv to support "export" syntax.
 - Resolve dependencies of wheel files.
 - Bugfix for allow_global with new resolver fixes.
 - Locally cache hashes for performance gains.
 - Lock prereleases correctly.
 - Add requests.pem back to package.
 - Auto-toggle PIPENV_VENV_IN_PROJECT when .venv is present.
 - Fix bug with pipfile casing.
 - Enable environment variable interpolation in pipfiles.
11.9.0:
 - Vastly improve markers capabilities.
 - Support for environment variables in Pipfiles.
 - Cache the Pipfile internally (for large Pipfiles).
 - Remove pipenv --update.
 - Export PYTHONDONTWRITEBYTECODE, to attempt to increase compatibility.
11.8.2:
 - Cleanup TOML.
 - Improve documentation.
 - Pass clear flag to resolver.
 - Improved private git URL handling.
11.8.1:
 - Removed (unused) Safety DB (licensing concerns).
11.8.0:
 - Fix a major bug in locking resolution.
11.7.4:
 - Don't use JSON results — problematic.
11.7.3:
 - Increase compatibility with strange Python installations (concurrency.futures).
11.7.2:
 - Bugfixes.
11.7.1:
 - Windows bugfix.
11.7.0:
 - Improvements to lockfile generation with private indexes.
11.6.9:
 - Bugfixes.
11.6.8:
 - Fix a Windows bug.
11.6.7:
 - Fix a Windows bug.
11.6.5:
 - Fix graph resolution.
 - May be some incompatibilities with private indexes and hashing. If so, it's worth it to fix graph resolution for now. Priorities. One thing at a time.
11.6.4:
 - Fix a bug.
11.6.3:
 - Depend on certifi.
11.6.2:
 - Properly vendor certifi.
 - Better support for --extra-index-url for private PyPI servers.
 - Bug fixes.
11.6.1:
 - Remove concurrent.futures, as it's not being used any longer, and is problematic.
11.6.0:
 - Vendor all of pip9, in preparation for the release of pip10.
11.5.3:
- Attempt to grab markers from -e – provided setup.py files.
- Revert "rely on the underlying pipenv sync architecture to pick up dependencies".
11.5.2:
 - Fix bug with markers (e.g. responses package).
11.5.1:
 - Restore bare 'pipenv update' functionality.
11.5.0:
 - Properly resolve hashes for private indexes.
 - Some subtle changes to the way resolution works — shouldn't affect you, but warrented a version bump.
11.4.0:
 - Stability.
 - Don't install dependencies straight-away with pipenv–install — rely on the underlying pipenv sync architecture to pick up dependencies.
 - Warn (abort) if requested update package is not in Pipfile.
 - Don't configure the Pipfile for keep_outdated when update is used.
11.3.3:
 - Sorry for all the bugs.
11.3.2:
 - Bugfix, of the craziest, hardest to reproduce nature.
11.3.1:
 - Fix shell --fancy.
11.3.0:
 - Default to using the Python Pipenv was installed with for new virtualenvs.
 - Report Python version of specified interpreter when creating virtualenv.
 - Disable JSON API usage, for now. It appears to cause some minor bugs related to markers (working on it).
11.2.2:
 - Potential bugfix related to subprocess invocations and environment variables.
11.2.1:
 - Actually use the Warehouse JSON API.
11.2.0:
 - Reduce the number of "bad packages", internally (e.g. don't exclude `six` anymore).
11.1.11:
 - Help improvements.
11.1.10:
 - Help improvements.
11.1.9:
 - $ python -m pipenv.help
11.1.8:
 - Resolver improvements.
11.1.7:
 - Packaging fix.
11.1.6:
 - Support for 'py' interpreter (on Windows).
 - Bugfixes.
11.1.5:
 - Vendor pew.
 - Be specific about which version of psutil we want.
 - Patch pip and pip-tools (further) like crazy, for hard-to-believe reasons, and the benefit of all.
11.1.4:
 - Resolve multiple extras when provided.
 - Improve completion time.
 - Remove vendored version of psutil (windows).
 - Bugfixes.
11.1.3:
 - Bugfix.
11.1.2:
 - No longer include hashes in `lock -r`.
 - Enable pew execution via python -m.
11.1.1:
 - Undo previous change.
11.1.0:
 - Default to the version of Python that Pipenv was installed with.
11.0.9:
 - PPA release.
11.0.8:
 - PPA release.
11.0.7:
 - PPA release.
11.0.6:
 - PPA release.
11.0.5:
 - PPA release.
11.0.4:
 - PPA release.
11.0.3:
 - PPA release.
11.0.2:
 - Hash order is deterministic now.
 - Bugfix.
11.0.1:
 - Bugfix.
11.0.0:
 - Massive resolver improvements!
 - Resolver now runs within virtual environments.
 - Resolver now uses PyPI JSON metadata to provide additional dependency information.
 - Environment information removed from `Pipfile.lock`.
 - Clean up temporary files used during dependency resolution.
10.1.2:
 - Bugfix.
10.1.1:
 - Assume `PIPENV_VENV_IN_PROJECT` if `./.venv/` already exists.
 - Use and generate hashes for PyPI mirrors and custom indexes.
10.1.0:
 - Default dependencies now take precedence over Develop dependencies when
   creating a Pipfile.lock.
 - Introducing `pipenv lock --keep-outdated`, which can also be passed to
   `install` and `uninstall`.
 - Introducing `pipenv install --selective-upgrade <package>`, which only
   updates the given package in your Pipfile.lock.
 - New Pipfile configuration option for [pipenv] section: `keep_outdated`.
10.0.1:
 - Add extra indexes from pip config files in Pipfile generation.
 - Fix bug with `pipenv clean`.
 - Install from Pipfile.lock after each successful `pipenv install`.
 - Temporary file cleanup.
10.0.0:
 - Introduce `pipenv sync` command.
 - Introduce `pipenv clean` command.
 - Deprecate `pipenv update` command.
 - Fully remove `check --style` functionality.
 - Better `lock -r` functionality.
 - Up-to-date security checks for `pipenv check`.
9.1.0:
 - Add --system flag to $ pipenv check.
 - Removal of package name suggestions.
 - Support for [scripts] in Pipfile.
 - Comment out invalid (to pip's hash checking mode) packages from `$ pipenv lock -r`.
 - Updated patched version of dotenv.
 - Do not allow `$ pipenv install --system packagename `to be used.
 - Deprecate the usage of `$ pipenv check --style`.
 - Show pip install logs with --verbose.
 - Allow -v as shorthand for --verbose for all commands.
 - Prevent duplicate virtualenv creation on windows due to drive casing.
 - Discard comments in output of `pip freeze` when running `pipenv update`.
 - Ignore existing `requirements.txt` files when pipenv is called with the `--requirements` flag.
 - Support `allow_global` during dependency resolution.
 - Add virtualenv activation support for `sh` (see #1388).
 - Improve startup times via lazy loading of imports.
 - Improve parsing of extras, markers, and path requirements.
 - Fix regression with VCS url parsing being treated as a normal path.
 - Resolve an issue causing local paths with the same name as a PyPI package to prevent proper dependency resolution.
9.0.3:
 - v9.0.1.
9.0.2:
 - A mistake.
9.0.1:
 - Fixed issue with specifiers being treated as paths on Windows.
 - Fixed regression causing development packages to always be installed.
9.0.0:
 - Fixed bug where packages beginning with vcs names (e.g. git) weren't installed correctly.
 - Fixed url parsing for <vcs>+<vcs>:// style urls.
 - Pipenv can now install relative file paths.
 - Better messaging around failed installs.
 - More resilient network io when retrieving data from PyPI.
 - Fixed bug with bad dependency pinning via pip-tools.
 - Prompt user to destroy and recreate virtualenvironment if they are in a currently activated environment.
 - Added enhancement for pip-tools to resolve dependencies with specific versions of python
 - Fixed bug where newlines were not escaped in .env files when loaded
 - Sequentially install all local and vcs dependencies to avoid write race conditions.
 - Fixed accidental exclusion of files from some VCS installs.
8.3.2:
 - Moved automated update check to once every 24 hours.
 - Better default for PYENV_ROOT.
 - Correctly support all pip --index specifiers.
 - Fix bug where pre-releases of Python were chosen over finals.
8.3.1:
 - Fixed issues with calling block too many times on single subprocess.
 - Updated vendored delegator.py.
 - Changed --dev flag for the uninstall command to --all-dev to better represent what it does.
8.3.0:
 - Add support for installation from remote requirements file.
 - Add --reverse to pipenv graph, displaying inverted dependency graph.
 - VCS dependencies now install sequentially to avoid write lock conflicts.
 - Allow PIPENV_IGNORE_VIRTUALENVS to work with pipenv shell on Windows.
 - Enforce newline termination of Pipfile.
 - More robust requirements.txt conversion experience.
 - Respect allow_prereleases in all locking scenarios.
 - Separated default and development dependency output when using lock -r and lock -r -d respectively.
 - Print whole help message with pipenv --help.
8.2.7:
 - Add update --sequential.
 - Fix unicode decode error on windows.
 - Fix bug with non-editable installs.
 - Update vendored setuptools.
 - Improvements to check --unused.
 - Fix install for local sdist packages.
 - Updating the patched pip-tools with the wheel dependency bugfix.
 - Fix git remote address modified changing underscore to a hyphen.
 - Fix py2toml with dashes (dev-packages)
 - Fix for --dry-run, reporting backwards.
 - Fix installing with all release specifiers.
 - Removed unused vendor libraries.
8.2.6:
 - Fix for some git remotes.
 - Increased the default number of max rounds for pip-tools, made it user-configurable.
 - Fix self-updating.
8.2.5:
 - Fixed bad attribute call on date checks.
8.2.4:
 - Enhanced sha messaging — lockfile short shas are now displayed.
 - Improve Windows unicode output.
 - General UX and other improvements.
8.2.3:
 - Don't show activation instructions when --deploy is used.
8.2.2:
 - Improve system pip detection.
8.2.1:
 - Enhanced pip resolver — hopefully that won't blow up in our faces.
 - Fixed file links.
8.2.0:
 - Made things nicer.
8.1.9:
 - Fix logging bug.
8.1.8:
 - Fix dependencies with markers attached. That wasn't easy.
 - Vendor (patch) pip-tools.
 - Honor PIP_SRC if it is provided.
8.1.7:
 - Update Python 2.x default to 2.7.14.
 - Deploy mode aborts if Python version doesn't match.
8.1.6:
 - Abort when Python installation appears to fail.
8.1.5:
 - Update pexcept to fix shellquote issues in subprocesses.
8.1.4:
 - Tell users in compatibility mode how to exit the shell.
 - Updated patched pip's vendored pkg-resources.
8.1.3:
 - Further improve patched pip, for crazy setup.py files.
8.1.2:
 - chdir option for project, for really stubborn people.
8.1.1:
 - Better exception handling when a corrupt virtualenv is being used.
8.1.0:
 - Better path handling.
8.0.9:
 - Bug when -r is passed in a subdirectory.
8.0.8:
 - Add verbose mode to Pip.
8.0.7:
 - Fix --skip-lock when verify_ssl = false.
 - Always quote pip path.
 - Fix --update.
8.0.6:
 - Fix indexes.
8.0.5:
 - $ pipenv open :module
8.0.4:
 - $ pipenv install --deploy.
8.0.3:
 - Improvements to dependency resolution against various versions of Python.
 - Fix issue with nested directories all containing Pipfiles.
 - Fix issue with --py when run outside of a project.
 - Refactoring of virtualenv detection.
 - Improvements to crayons library.
 - PIPENV_DOTENV_LOCATION.
8.0.1:
 - Fix weird edge case with ramuel.ordereddict.
8.0.0:
 - new [pipenv] settings, allows for allows_prereleases=True, automatically set when using install --pre.
7.9.10:
 - Use urllib3 directly, for exceptions handling.
7.9.9:
 - Fix argument parsing.
7.9.8:
 - Fix argument parsing.
7.9.7:
 - Fix help printout screen (and update it).
 - Use urllib3's warning suppression directly.
7.9.6:
 - Did you mean?
7.9.5:
 - More usage examples in help output.
7.9.4:
 - Support for editable extras.
7.9.3:
 - Use foreground color instead of white.
7.9.2:
 - UX cleanup.
7.9.1:
 - Bug fix with indexes.
7.9.0:
 - Bug fix with indexes.
7.8.9:
 - Fix for Heroku.
7.8.8:
 - Make --fancy default for windows users.
7.8.7:
 - Make resolver use client python for setup.py egg_info (very fancy).
 - Fix a nasty windows bug.
 - add --completion.
 - add --man.
7.8.6:
 - Don't import code automatically, only use -c ..
7.8.5:
 - Edge case.
7.8.4:
 - Flake8 checking with check --style!
7.8.3:
 - $ pipenv check --unused.
7.8.2:
 - Fallback to toml parser for absurdly large files.
7.8.1:
 - Catch all exceptions in pipreqs.
7.8.0:
 - Packaging fix.
7.7.9:
 - Ignore bad packages with -c.
7.7.8:
 - Minor bug fix.
7.7.7:
 - $ pipenv install -c .
7.7.6:
 - Fix a very very minor UX bug.
7.7.5:
 - No longer eat editables, as pip-tools does it for us now.
7.7.4:
 - Install VCS deps into the virtualenv's src directory, not into the current directory.
7.7.3:
 - Fix --three on Windows.
7.7.2:
 - Bug fixes.
7.7.1:
 - Bug fixes.
 - Improvements to --index support for requirements imports.
7.7.0:
 - Improved update caching mechanism.
 - Only prompt for spelling correction in interactive sessions.
 - Cleanup -e.
7.6.9:
 - Change --two, and --three to use --python 2 and --python 3 under the hood.
 - This restores --two / --three usage on windows.
7.6.8:
 - `pipenv install -r requirements.txt --dev` now works.
7.6.7:
 - New less-fancy progress bars (for linux users, specifically).
 - Support --python 3.
7.6.6:
 - Packaging problem.
7.6.5:
 - Patched vendored 'safety' package to remove yaml dependency — should work on all Pythons now.
7.6.4:
 - Extensive integration test suite.
 - Don't suggest autocorrections as often.
 - Cleanups.
 - Don't depend on setuptools anymore.
7.6.3:
 - Cleanups.
7.6.2:
 - Support for install/lock --pre.
7.6.1:
 - Fix a nasty bug.
7.6.0:
 - PEP 508 marker support for packages!
 - Better verbose mode for install.
 - Fix a nasty bug.
7.5.1:
 - Skip the resolver for pinned versions (this comes up a lot).
 - Maximum subprocesses (configurable) is now 8.
7.5.0:
 - Deprecate shell -c mode.
 - Make a new shell --fancy mode (old default mode).
 - Introduce PIPENV_SHELL_FANCY.
 - Introduce `pipenv --envs`.
7.4.9:
 - Improvements to PIPENV_DEFAULT_PYTHON_VERSION.
 - Improvements to auto-suggestions.
 - Fix nasty bug with failing dependencies.
7.4.8:
 - PIPENV_DEFAULT_PYTHON_VERSION
7.4.7:
 - install --sequential, for boring people.
 - PIPENV_DONT_LOAD_ENV.
 - Fix for prettytoml.
 - Don't add -e reqs to lockfile, as they're already present.
7.4.6:
 - Specify a specific index for a specific dependency.
7.4.5:
 - Support for custom indexes!
 - Random bugfixes.
7.4.4:
 - PIPENV_PIPFILE environment variable support.
 - --site-packages flag, for the crazy at heart.
 - Installation concurrency on Windows.
 - make `graph --json` consistent with `graph`.
 - Much better support for suggesting package names.
 - Updated to pipfile spec 4, support for path= for relative package names.
 - Import sources from requirements files.
 - Cleanup stderr/stdout.
 - 'pipenv check' only reports safety now for Python 3.
7.4.3:
 - Download/install things concurrently.
7.4.2:
 - Fix a nasty pyenv bug.
7.4.1:
 - `graph --json`.
7.4.0:
 - `pipenv --where` fix.
 - Other general improvements.
7.3.9:
 - Packaging fix.
7.3.8:
 - Packaging fix.
7.3.7:
 - Automatic support for .env files!
 - Fuzzy finding of popular package names, for typos. Auto-suggested corrections for popular packages.
 - Bug fixes.
7.3.6:
 - Fix VCS dependency resolution.
7.3.5:
 - Fix packaging.
7.3.4:
 - An error occurred.
7.3.3:
 - Pipenv check now includes security vulnerability disclosures!
7.3.2:
 - Vastly improved support for VCS dependencies.
7.3.1:
 - Advanced pyenv minor version support.
 - Added support for "full_python_version".
 - Added support for specifying minor versions of Python with `--python`.
 - Removed "considering this to be project home" messaging from `pipenv install`.
7.3.0:
 - Added support for grabbing dependencies from -e requirements into dependency graph.
7.2.9:
 - Bug fixes.
7.2.8:
 - Vast improvements to python finding abilities (multiple pythons with the same name are now detected).
7.2.7:
 - Automatically convert outline TOML tables to inline tables (losing comments in the process).
 - Bug fixes.
7.2.6:
 - Fix pip execution from within existing virtualenvs.
7.2.5:
 - Always tell patched pip what version of Python we're using.
7.2.4:
 - Improve compatibility with --system.
 - Improve automatic --system use within shell spawning (disallowing it).
7.2.3:
 - Courtesy notice when running in a virtualenv.
7.2.2:
 - Improvements to pyenv detection.
 - Refactorings, and general improvements
7.2.1:
 - Bug fix.
7.2.0:
 - Automatically install Pythons, if they aren't available and pyenv is setup!
 - Fixes for when a requirements.txt file contains an !.
 - Support for relative package paths (that wasn't easy either).
 - Bug fixes.
7.1.1:
 - Fixes for windows (full compatibility restored — sorry!).
 - Catch if graph is being run outside of a project directory.
 - Catch if self-updater doesn't get a clean response from PyPI.
 - Support Miniconda's `python --version` format
7.1.0:
 - Inline TOML tables for things like requests[security]!
 - Attempt to preserve comments in Pipfiles.
7.0.6:
 - NO_SPIN is now automatic when CI is set.
 - Additionally, vendor pip (a patched version) for doing advanced dependency resolution.
7.0.5:
 - Depend on latest version of pip.
7.0.4:
 - Bug fix.
7.0.3:
 - Windows fixes.
7.0.2:
 - Tell pip we're using the required Python version, with trickery, for dependency resolution.
 - Dev dependencies are now read from a lockfile before default dependencies, so
   any mismatches will prefer default to develop.
 - Add support for extras_require in Pipfile for vcs urls.
 - Warn if 'which' is not found on the system.
 - Warn if Pew or Virtualenv isn't in the PATH.
 - More consistent stderr output.
7.0.1:
 - [requires] python_version is now set for new projects, automatically
   if a version of Python was specified.
 - That wasn't easy.
7.0.0:
 - New path handling for --python, versions like '3.6' are now supported.
 - [requires] python_version is automatically honored.
6.2.9:
 - Bug fix.
6.2.8:
 - Bug fix.
6.2.7:
 - pip run --system is now default.
6.2.6:
 - Snakes, all the way down (and easter eggs for holidays!)
 - Much improved CLI output.
 - Introduction of PIPENV_HIDE_EMOJIS environment variable.
 - Guide users to set LANG and LC_ALL.
6.2.5:
 - Bug fix for 2.7.
6.2.4:
 - UX Improvements.
 - Install un-installable dependencies, anyway.
6.2.3:
 - Bug fixes and improvements.
 - Add refs to lockfile for VCS dependencies.
 - Don't re-capitalize URLs.
 - Specify a requirements file to import from, with install --requirements / -r
 - Install dependencies for VCS installs.
6.2.2:
 - Bug fix.
 - Support for passwords in git URLs.
6.2.1:
 - Quick fix.
6.2.0:
 - Support for arbitrary files (e.g. pipenv install URL)!
 - $ pipenv graph!
 - $ pipenv run --system ipython.
 - Skip virtualenv creation when --system is passed to install.
 - Removal of lock --legacy.
 - Improvements to locking mechanism integrity.
 - Introduction of $ pipenv --jumbotron.
 - Internal refactoring/code reduction.
6.1.6:
 - Fix for Windows.
6.1.5:
 - Grab hashes for un-grabbable hashes.
6.1.4:
 - New update via $ pipenv --update, instead.
6.1.3:
 - Skip validation of Pipfiles, massive speedup for far-away users.
 - Other speed-ups.
6.1.1:
 - Bug fix.
6.1.0:
 - Self–updating! Very fancy. $ pipenv update.
 - Verbose mode for update, install.
6.0.3:
 - Major bug fix.
 - Fix for Daniel Ryan's weird corner case.
6.0.2:
 - Fix Python 2 regression.
6.0.1:
 - Minor (major) bug fix.
6.0.0:
 - New locking functionality — support for multiple hashes per release!
 - Hashes are now default, everywhere, once again! We figured it out :)
 - Pipenv talks to the PyPI (Warehouse) API now for grabbing hashes.
 - --hashes flag removed.
 - Upgraded to Pipfile spec 2.
 - New --legacy mode for lock.
5.4.3:
 - Fix for windows.
5.4.2:
 - Compatibility improvement with `run`.
5.4.1:
 - Fix for packaging.
 - $PIPENV_SKIP_VALIDATION.
5.4.0:
 - Automatically load PATH from virtualenv, before running `pipenv shell`.
 - Addition of `pipenv lock --verbose`.
 - Vendor 'background' library.
5.3.5:
 - Addition of update --dry-run.
 - Removal of install --lock option.
5.3.4:
 - Fix pip index passing.
5.3.3:
 - Automatic notification of version updates.
5.3.2:
 - Automatic locking after install/uninstall (because it's fast now!)
5.3.1:
 - Improvements for windows.
5.3.0:
 - Mega fast pipenv lock!
 - Drop of Python 2.6.
5.2.0:
 - Introduce install --skip-lock.
 - Bugfixes.
5.1.3:
 - Updated delegator.py to 0.0.13
5.1.2:
 - Add missing cacerts.pem file to MANIFEST.in
 - Improve error message when running `pipenv shell` multiple times.
 - Fixed translation for editable installs from requirements.txt to Pipfile.
5.1.1:
 - Bug fix
5.1.0:
 - Add PIPENV_TIMEOUT environment variable for custom timeouts.
 - Remove PIPENV_DEFAULT_THREE.
5.0.0:
 - Automatically utilize virtualenvs when they are activated.
 - PIPENV_DEFAULT_THREE.
4.1.4:
 - Fix regression in `pipenv lock -r` functionality.
4.1.3:
 - Fix support for `pipenv install -e .`
4.1.2:
 - Lazy load requirements for speed improvements.
 - Better messaging on failed installs.
 - More accurate logging for installation progress.
4.1.1:
 - Remove old references
4.1.0:
 - Properly handle extras on requirements with versions.
 - Accept the -e (editable) flag in pipenv install.
 - Progress Bars!
 - Minor optimizations to the install process.
4.0.1:
 - Pin Sphinx requirement at a Python 2.6 compatible version.
4.0.0:
 - Make --no-hashes default, introduce --hashes.
 - Fix for key error when uninstalling [dev-]packages
3.6.2:
 - Fix bug introduced into `pipenv install` in 3.6.1.
3.6.1:
 - pipenv install now works if only a requirements.txt is present.
 - `pipenv uninstall` now uninstalls from dev-packages as intended.
3.6.0:
 - Make --two/--three handling more consistent.
 - Update vendored delegator.py.
 - Fix erroneous error messages in certain command combinations.
 - Better version number handling for post releases.
 - Bug fixes for some Windows environments (specifically Appveyor).
3.5.6:
 - Fix broken help prompt.
3.5.5:
 - Automatically cleanup virtualenv on keyboard interrupt.
 - General improvements.
3.5.4:
 - Bug fixes.
 - Message formatting cleanup.
3.5.3:
 - Add six to vendored libraries.
 - Support for --ignore-hashes added to install command.
 - Support for --no-hashes for lock command.
3.5.2:
 - Vendor all the things!
 - get-pipenv.py.
3.5.1:
 - Basic Windows support!
3.5.0
 - Fully support multiple sources in Pipfile.
 - Support multiple project directories with same name.
 - Better support for non-standard project directory names.
 - Support for VCS dependencies.
3.4.2
 - Attempt installing from all sources in Pipfile.
 - Fix bug with accidental deletion of Pipfile contents.
 - Update dependencies to work correctly with pipsi.
3.4.1
 - --no-interactive mode now activates automatically when needed.
3.4.0
 - --no-interactive mode added.
 - Properly handle non-standard versioning schemes including Epochs.
 - Handle percent-encoded filenames.
 - Fixed Bug with Pipfile initializations.
 - Streamlined file locations for projects.
 - Improved package name resolution.
 - Testing!
3.3.6:
 - $ pipenv --venv option.
 - $ pipenv --rm option.
3.3.5:
- Disable spinner by setting PIPENV_NOSPIN=1 environment variable.
3.3.4:
 - Fix PIPENV_VENV_IN_PROJECT mode.
 - Fix PIPENV_SHELL_COMPAT mode.
3.3.3:
 - Spinners!
 - Shell compatibility mode ($ pipenv shell -c).
 - Classic virtualenv location (within project) mode.
 - Removal of $ pipenv install --requirements.
 - Addition of $ pipenv lock -r.
3.3.2:
 - User-configurable max-depth for Pipfile searching.
 - Bugfix.
3.3.1:
 - Bugfix for install.
3.3.0:
 - Use pew to manage virtual environments.
 - Improved dashed version parsing.
3.2.14:
 - Give --python precedence over --three/--two.
 - Improvements for lockfile output for specific problematic packages.
 - Bug fixes.
3.2.13:
 - Improved stderr output for --requirements.
 - Bug fixes.
3.2.12:
 - Disable colors by setting PIPENV_COLORBLIND=1 environment variable.
3.2.11:
 - Properly use pinned versions from Pipfile in Pipfile.lock
3.2.10:
 - Fix bugs.
3.2.9:
 - Remove temporary requirements.txt after installation.
 - Add support for --python option, for specifying any version of Python.
 - Read source Pipfile.lock.
3.2.8:
 - Lock before installing all dependencies, if lockfile isn't present.
3.2.7:
 - Cache proper names for great speed increases.
3.2.6:
 - Bug fixes.
3.2.5:
 - Significant speed improvements for pipenv run and pipenv shell.
 - Shell completion via click-completion.
 - Perform package name normalization as best effort attempt.
3.2.4:
 - $ pipenv uninstall --all
 - Don't uninstall setuptools, wheel, pip, or six.
 - Improvements to Pipfile re-ordering when writing.
 - Fix proper casing mechanism.
 - Prevent invalid shebangs with Homebrew Python.
 - Fix parsing issues with https://pypi.org/simple.
 - Depend on 'pipfile' package.
3.2.3:
 - $ pip uninstall --dev
 - Minor refactoring.
 - Improved error messaging for missing SHELL environment variables.
3.2.2:
 - Better support for fish terminal.
3.2.1:
 - Ensure proper casing of all Pipfile-specified packages.
3.2.0:
 - Improved proper casing handling for mis-named packages.
 - Support for $ pipenv install django-debug-toolbar.
 - Minor cleanups.
 - Fix for Python 3.
3.1.9:
 - Bug fix.
3.1.8:
 - Bug fix.
3.1.7:
 - Actual Python 3 fix.
3.1.6:
 - Python 3 fix.
3.1.5:
 - Proper name resolver!
3.1.4:
 - $ pip install --requirements.
3.1.3:
 - Python 3 fix.
3.1.2:
 - Python 3 fix.
3.1.1:
 - Improved pip output (integrate with tool better).
 - Pass exit code of $ pipenv run commands.
3.1.0:
 - Check hashes upon installation!
3.0.1:
 - Oops, version jump.
 - Fix for $ pip uninstall --lock.
3.0.0:
 - Speed of locking improved.
 - Lock now uses downloads instead of installation functionality.
 - Lock fix.
 - Removed $ pipenv install -r functionality.
 - Removal of $ pipenv lock --dev.
 - Addition of $ pipenv install/uninstall --lock.
 - Preliminary (non-enforced) hash functionality.
0.2.9:
 - Enhanced–enhanced PEP 508 checking capabilities!
0.2.8:
 - Enhanced PEP 508 checking capabilities!
0.2.7:
 - Better workflow options for --three / --two.
0.2.6:
 - Fix for bash shell invocation.
 - Better support for comments in requirements.txt files.
 - Support for Pipfile's [[source]].
 - Pretty colors for help.
 - Refactors.
0.2.5:
 - Enhanced terminal resizing.
 - Cleanups from PRs: typos.
 - Better --where output when no Pipfile is present.
 - Fix for Python 3.
 - Rely directly on pexpect.
0.2.4:
 - Fix for bash shell.
0.2.3:
 - Support for Fish and Csh shells.
0.2.1:
 - Trove classifiers.
0.2.0:
 - Added support for $ pipenv --three / --two, for initializing virtualenvs with a specific Python version.
 - Added support for VCS-backed installs, including editables.
 - TODO: Still need to support non-git-backed VCS installations in Pipfiles.