0.27.0 release

= New Features

* Add `HtmlHint` pre-commit hook that checks HTML files with
  [HTMLHint](http://htmlhint.com/)
* Add support to the hook `execute` helper for accepting an optional list of
  splittable command arguments for transparently dealing with really long file
  lists and the operating system command length limit
* Add `modified_files` helper to `PostCheckout` and `PostRewrite` hooks
* Add `rewritten_commits` helper to `PostRewrite` hooks
* Add `gemfile` option to configuration file which allows a `Gemfile` to be
  loaded by Bundler to enforce particular gem versions during hook runs
* Add support for `OVERCOMMIT_DEBUG` environment variable which toggles the
  display of additional verbose output from executed commands
* Add support for defining
  [hooks based on your existing git hooks](README.md#adding-existing-git-hooks)
  within your `.overcommit.yml` (no Ruby code required)
* Add support for filtering all hooks except a small list via the `ONLY`
  environment variable (similar to `SKIP` except a whitelist instead of
  blacklist)

= Changes

* Don't display "No applicable _hook-type_ hooks to run" message unless debug
  mode is enabled

= Bug Fixes

* Fix pre-commit hook bug where amending a commit which breaks a symlink would
  result in that symlink not being included in the list of modified files
* Fix `CaseConflicts` pre-commit hook handling of large sets of files
* Fix `SemiStandard`/`Standard` hooks to read from `STDOUT` instead of `STDERR`
  and handle new output format
* Fix `commit-msg` hooks to handle large commit messages auto-generated by the
  `--verbose` flag for `git commit`

0.26.0 release

= New Features

* Add `EmptyMessage` commit-msg hook that reports commits messages that are
  empty or contain only whitespace
* Add `env` hook configuration option that allows you to set values for
  environment variables during the course of a particular hook's run

= Bug Fixes

* Fix handling of paths with spaces in the name
* Fix `CaseConflicts` pre-commit hook to not fail on initial commit
* Fix handling of files removed or renamed in a commit amendment

0.25.0 release

* Include SVG files in `ImageOptim`, `XmlLint`, and `XmlSyntax` pre-commit
  hooks by default
* Make `IndexTags` hooks quiet by default
* Add `Vint` pre-commit hook that checks Vim script with
  [Vint](https://github.com/Kuniwak/vint)
* Add `Scalariform` pre-commit hook that checks formatting of Scala code with
  [Scalariform](https://mdr.github.io/scalariform/)
* Add `SlimLint` pre-commit hook that analyzes Slim templates with
  [Slim-Lint](https://github.com/sds/slim-lint)
* Enhance `HardTabs` and `TrailingWhitespace` pre-commit hooks to including
  line information in errors, making it work as expected when
  `problem_on_unmodified_line` is set to something other than `report`
* Fix handling of changing a symlink to a directory on commit amendment so it
  is not included in the list of modified files for pre-commit hooks
* Rename `Rubocop` pre-commit hook to `RuboCop` to match the project's proper
  name
* Handle empty commit messages in `CapitalizedSubject`, `SingleLineSubject`,
  `HardTabs`, `TextWidth`, and `TrailingPeriod` commit-msg hooks

0.24.0 release

= New Features

* Add `required_library`/`required_libraries` hook option which specifies
  a list of paths a hook should load with `Kernel.require` before running
* Add `JsLint` pre-commit hook that checks the style of JavaScript files with
  [JSLint](http://www.jslint.com/)
* Add `RubyLint` pre-commit hook that statically analyzes Ruby files with
  [ruby-lint](https://github.com/YorickPeterse/ruby-lint)
* Add `Jsl` pre-commit hook that checks the style of JavaScript files with
  [JavaScript Lint](http://www.javascriptlint.com/)
* Add `CapitalizedSubject` commit message hook
* Add `GoVet` pre-commit hook that examines Go source files with
  [vet](https://godoc.org/golang.org/x/tools/cmd/vet)
* Add `XmlSyntax` pre-commit hook to check that XML files are valid
* Add `CaseConflicts` pre-commit hook which checks for file names in the same
  directory which differ by letter casing
* Preserve existing git hooks in a repository when installing Overcommit hooks,
  and restore them on uninstall
* Add `RSpec` pre-push hook that runs [RSpec](http://rspec.info/) tests before
  pushing to remote
* Add `ProtectedBranches` pre-push hook that prevents destructive pushes
  (deletions or force pushes) to specified branches
* Add `SpellCheck` commit-msg hook to check commit messages for misspelled words
* Add support for `pre-rebase` hooks
* Add `SubmoduleStatus` `post-checkout`, `post-commit`, `post-merge`, and
  `post-rewrite` hooks that warn when submodules are uninitialized, out of date
  with the current index, or contain merge conflicts

= Changes

* Disable `ShellCheck` pre-commit hook by default
* Switch `ImageOptim` hook to use executable instead of Ruby API
* Improve `CoffeeLint` pre-commit hook to differentiate between errors and
  warnings
* Improve `GoLint` pre-commit hook to extract file and line information
* Change configuration loading behavior to prefer user-defined `ALL` hook
  configuration over default `ALL` configuration, and user-defined hook
  configuration over default `ALL` configuration
* Change hook summary message to mention warnings if there were any
* Disable almost all hooks by default. You will now need to explicitly enable
  almost all hooks yourself in your `.overcommit.yml`. If you are migrating from
  `overcommit` 0.23.0 and want to use the default configuration that shipped
  with that version, copy the [default configuration from 0.23.0](https://github.com/brigade/overcommit/blob/9f03e9c82b385d375a836ca7146b117dbde5c822/config/default.yml)
* Update `ScssLint` pre-commit hook to properly handle special exit code that
  signals all files were filtered by exclusions (new as of `scss-lint` 0.36.0)
* Update `childprocess` dependency to minimum 0.5.6
* Change default value for `problem_on_unmodified_line` from `warn` to `report`
* Update `Rubocop` pre-commit hook to pass `--display-cop-names` flag so
  cop names appear in output
* Drop support for returning `:good`/`:bad` results from hooks (was deprecated in
  0.15.0)
* Remove `PryBinding` pre-commit hook since its functionality is provided by the
  `Rubocop` pre-commit hook

= Bug Fixes

* Fix `LocalPathsInGemfile` to not report lints for commented paths
* Fix `CssLint` pre-commit hook to ignore blank lines in `csslint` output
* Fix error instructions typo in `BundleCheck` pre-commit hook
* Fix bug where stashed changes were not restored when plugin signature
  validation failed
* Don't clear working tree after pre-commit hook when only submodule changes
  are present
* Restore file modification times of unstaged files in addition to staged files
  in pre-commit hook runs

0.23.0 release

= New Features

* Add pre-commit [ESLint](http://eslint.org/) hook
* Add pre-commit hooks for [standard](https://github.com/feross/standard) and
  [semistandard](https://github.com/Flet/semistandard) JavaScript linters
* Add support for `post-commit`, `post-merge`, and `post-rewrite` hooks
* Add `GitGuilt` `post-commit` hook to display changes in blame ownership for
  modified files
* Add `execute_in_background` helper to provide a standardized way to start
  long-running processes without blocking the hook run
* Add `IndexTags` hook for `post-commit`, `post-merge`, and `post-rewrite`
  hook types so tags index can always be kept up to date via `ctags`
* Add `W3cCss` and `W3cHtml` pre-commit hooks which integrate with the
  `w3c_validator` gem
* Add `Scalastyle` pre-commit hook that runs
  [scalastyle](http://www.scalastyle.org/) against Scala code
* Add `XmlLint` pre-commit hook to check XML files with
  [xmllint](http://xmlsoft.org/xmllint.html)
* Add `JavaCheckstyle` pre-commit hook to check style of Java files with
  [checkstyle](http://checkstyle.sourceforge.net/)
* Add `Pep8` pre-commit hook to check Python files with
  [pep8](https://pypi.python.org/pypi/pep8)
* Add `Pyflakes` pre-commit hook to check Python files with
  [pyflakes](https://pypi.python.org/pypi/pyflakes)
* Add `Pep257` pre-commit hook to check Python files with
  [pep257](https://pypi.python.org/pypi/pep257)
* Add `HtmlTidy` pre-commit hook to check HTML files with
  [tidy](http://www.html-tidy.org/)
* Add `Pylint` pre-commit hook to check Python files with
  [pylint](http://www.pylint.org/)

= Changes

* Parse JSHint errors more precisely
* Remove `JsxHint` and `Jsxcs` pre-commit hooks in favor of using the
  `required_executable` option on the JsHint and Jscs pre-commit hooks
* Change behavior of configuration options containing array values to always
  replace the old value instead of appending to it
* Change `ImageOptim` hook to fail instead of warn if the `image_optim` gem
  cannot be found
* Remove `ctags_arguments` option from `IndexTags` hooks
* Improve `PythonFlake8` pre-commit hook to differentiate between errors
  and warnings
* Improve `CssLint` pre-commit hook to differentiate between errors and
  warnings

= Bug Fixes

* Fix `--run` flag to consider all lines in all files as modified rather than none
* Fix `--run` flag to exclude submodule directories from the list of modified files
* Fix handling of files with spaces in their name when calculating modified
  lines in a file

0.22.0 release

* Disable `Reek` pre-commit hook by default
* Allow `required_executable` to include paths that are in the repo root
* Add `command` hook option allowing the actual command that is executed
  to be configured (useful to invoke command via `bundle exec` or similar)
* Add `flags` hook option allowing the flags passed on the command line
  to be configured

0.21.0 release

* Change `HardTabs`, `MergeConflicts`, and `PryBinding` pre-commit hooks to
  be `quiet` by default
* Switch `TravisLint` pre-commit hook from deprecated `travis-lint` gem to
  `travis` gem
* Add .projections.json configuration file
* Add pre-commit static analysis and linting for sh/bash scripts with
  [ShellCheck](http://www.shellcheck.net/)
* Use `--verbose` flag when running JSCS to include name of offending rule

0.20.0 release

* Add `--run` flag which runs all configured pre-commit hooks against the
  entire repository
* Fix installer to work with Overcommit hooks created via `GIT_TEMPLATE_DIR`
* Fix hook runner to not display skip message unless hook would have actually
  run
* Change `ImageOptim` hook to use `skip_missing_workers` option and update
  dependency to 0.18.0
* Remove interactive prompt support from overcommit hooks
* Change hook signing from interactive flow to be done via
  `overcommit --sign <hook-type>` command

0.19.0 release

* Add `--no-pngout` flag for `image_optim` command on `:fail` message
* Fix `Brakeman` pre-commit hook when multiple files have been staged
* Reset modification times more frequently when cleaning up the environment
  after running pre-commit hooks. This should help overcommit work with file
  watchers a little more nicely.
* Add pre-commit JavaScript style checking with
  [JSXCS](https://github.com/orktes/node-jsxcs)
* Add pre-commit Ruby code smell checking with
  [Reek](https://github.com/troessner/reek)
* Gracefully handle `.git` files that point to an external git directory

0.18.0 release

* Update minimum version of `image_optim` gem to 0.15.0 (breaking change in
  name of exception classes)
* Add `--list-hooks` flag which displays all hooks for a repository and
  whether they are enabled/disabled
* Add `required_executable` and `install_command` options that allow a hook
  to define an executable that must be in the `PATH` in order for it to work,
  and a command the user can use to install the executable if it doesn't exist
* All built-in hooks will now fail if the required executable is not present
* Fix bug where pre-commit hook would crash if user attempted to commit a
  broken symlink
* Add `BrokenSymlinks` pre-commit hook which checks for broken symlinks
* Fix Chamber integration
* Fix 'include' path for ChamberSecurity
* Fix bug where commit message from cherry-picked commit would be lost if
  there were conflicts