Coala

This release has been brought to you by 30 contributors contributing
over 101 commits.

**New Bears**

CSS:

- `StyleLintBear` - Lints css files using stylelint

Elm:

- `ElmLintBear` - Formats source code according to given set of rules.

Generic:

- `LicenseCheckBear` - Checks given files for license. Searches start
or end of files for lines belonging to various licenses.
- `DuplicateFileBear` - Checks for duplicate files.

Enhancements:

- `FilenameBear` can now recognize kebab-case naming convention.
- `FilenameBear` can predict naming conventions for wide-spread
languages like java, javascript and python. Set the
`file_naming_convention` to `auto` to use this feature.
- `GitCommitBear` can now enforce issue reference in commits.
- `GitCommitBear` now recognizes `user/repo12` type issue references.
- `JSONFormatBear` notifies if run on empty files.
- `JSONFormatBear` tells the lines and columns at which the error
occured instead of showing it in the error message.

**New settings**

- `LineCountBear` can now exclude blank lines in counting the number
of lines in a file. The new setting name is `exclude_blank_lines`
and it is disabled by default i.e. `False`.
- `PyUnusedCodeBear` can remove unused variables, see setting
`remove_unused_variable`.
- `ShellCheckBear` can ignore specific rules by providing those in the
`ignore_actions` setting.
- `YAMLLintBear` can now be configured to check for maximum characters
in a line, by default it is set to 80.

**Default Setting Modifications**

- `LanguageToolBear` - `language` setting is changed to
`natural_language`, please update your settings, it'll be deprecated
completely in next release.
- `MarkdownBear` - `max_line_length` setting is changed to `None`
instead of 80. [Issue 1581](https://github.com/coala/coala-bears/issues/1581)
- `YAMLLintBear` - `document_start` setting is changed to `None`, not
forbiding the usage of document start marker(---) by default. [Issue 1417](https://github.com/coala/coala-bears/issues/1417)

**Bug Fixes**

- `InvalidLinkBear` now extracts links from markdown correctly. [Issue 1338](https://github.com/coala/coala-bears/issues/1338)
- `InvalidLinkBear` now extracts all the links in a line. Earlier it
used to extract only the first match.
- `PyCodeStyleBear` now uses user settings along with default
settings. Earlier it used to ignore default settings if user changed
one of them.
- `PyImportSortBear` now correctly supports option
`known_third_party_imports`. [Issue 1510](https://github.com/coala/coala-bears/issues/1510)
- `KeywordBear` doesn't report false results when unsetting it.
Previously, it used to match any text instead of matching nothing.
[Issue 1689](https://github.com/coala/coala-bears/issues/1689)

- Fixed critical section inheritance bug where sections with different capitalization would not inherit. [Issue 4182 ](https://github.com/coala/coala/issues/4182)

Shortlog
- __Major changes to exitcode behavior(see [docs](http://docs.coala.io/en/latest/Users/Exit_Codes.html))__
- `default` .coafile section will be deprecated soon. Please stop using it now!
- Initial next gen core code has been commited, however it has not been activated
- New logging handlers
- Better aspects support has been added, still not ready for general usage
- Empty results are not cached. End users shouldn't have to run with `--flush-cache` anymore
- coala should now be able to output in `unified-diff` format
- golang now has coalang doc bindings (?)
- coafiles can now use the append (+=) operator to inherit from other sections
- ...and much more

Bugfixes:
- Remark dependency has been pinned back to ~5.4 because version 6 changes
current behavior and breaks tests. This is a hotfix which will be rolled
back when the upstream addresses this.

This release, we had 97 commits contributed by 42 contributors.

The coala website has been updated to a new, more modern design. You can now find a quick overview of bears and their settings at http://coala.io/!/languages. We also have sample a bear output on the front page for some common languages.

Separation of bear dependencies from the `coala_bears` package is planned. This release will keep the same behavior as previous releases. However to keep current installation behavior in the future, please use the pip package index option `[alldeps]` as in `pip3 install coala_bears[alldeps]`.

Here are the important changes and additions. This release tracks coala 0.10. Please see the coala release notes for the improvements in this version.

**New Bears**

Haskell:
- `GhcModBear` - Checks your Haskell code for syntax errors.

Python:
- `PyFlakesBear` - Checks for errors by parsing, making it safe for modules with side effects.
- `PyromaBear` - Checks how well your code conforms to the python packaging system (pip, distribute, etc).
- `PythonPackageInitBear` - Checks that modules have an `__init__.py` in their directories.

Others:
- `DennisBear` - Checks `PO` and `POT` files for problems.

**Bears With New Settings**

You can look up the new settings at http://coala.io/!/languages.
- `GitCommitBear`
- `InvalidLinkBear`
- `MarkdownBear`

**Deprecated Settings**
- `InvalidLinkBear` - `timeout` setting has been deprecated. Use `network_timeout` instead.

**Enhancements**
- `InvalidLinkBear` allows per website timeouts. To use, set `network_timeout` to a dictionary with website URL and timeout.
- `InvalidLinkBear` allow multiple URL ignores in `links_to_ignore` setting by setting it to a string of comma delimited URLs.
- `InvalidLinkBear` now parses version control system URLs.
- `CSVLintBear` now outputs the affected line.
- `XMLBear` now uses severity that matches the underlying linter.

**Bugfixes**
- `coala\_bears` package will refuse to install on unsupported python versions. [Issue 3310](https://github.com/coala/coala/issues/3310)
- `InvalidLinkBear` now analyses all links in a file. Previously, it would
only check the first one. [Issue 1296](https://github.com/coala/coala-bears/issues/1296)
- `InvalidLinkBear` now parses markdown links properly. [Issue 1338](https://github.com/coala/coala-bears/issues/1338)
- `KeywordBear` proposes keyword removal patches for all keywords now. Previously, it would only generate a patch for the first keyword. [Issue 1274](https://github.com/coala/coala-bears/issues/1274)
- `KeywordBear` now outputs the appropriate message if it is run on an unsupported language. Previously, it would throw an unhandled exception. [Issue 1256](https://github.com/coala/coala-bears/issues/1256)
- `YAPFBear` Default settings now match upstream defaults properly. [Issue 3241](https://github.com/coala/coala/issues/3241)
- The dependencies of the following bears were bumped due to upstream bugfixes:
- `PycodestyleBear`

- A dependency problem in `RadonBear` causing install failure has been fixed
[Issue 1228](https://github.com/coala/coala-bears/issues/1228)
- coala dependency has been fixed to only allow coala versions 0.9.x with
0.9 series bears
[Pull 1243](https://github.com/coala/coala-bears/pull/1243)
- `InvalidLinkBear` default timeout has been increased to 15 seconds from 2
because it was creating false positives
[Issue 1219](https://github.com/coala/coala-bears/issues/1219)