Add support for Swift with swiftlint (#214)

* Add support for swift with swiftlint

* Fix issue by adding '.swift' file extension

README.md

@@ -80,6 +80,7 @@ name. That seems to be the fairest way to arrange this table.
 | SASS | [sass-lint](https://www.npmjs.com/package/sass-lint), [stylelint](https://github.com/stylelint/stylelint) |
 | SCSS | [sass-lint](https://www.npmjs.com/package/sass-lint), [scss-lint](https://github.com/brigade/scss-lint), [stylelint](https://github.com/stylelint/stylelint) |
 | Scala | [scalac](http://scala-lang.org) |
+| Swift | [swiftlint](https://swift.org/) |
 | Tex | [proselint](http://proselint.com/) |
 | Text | [proselint](http://proselint.com/) |
 | TypeScript | [tslint](https://github.com/palantir/tslint), typecheck |

ale_linters/swift/swiftlint.vim

@@ -0,0 +1,9 @@
+" Author: David Mohundro <david@mohundro.com>
+" Description: swiftlint for swift files
+
+call ale#linter#Define('swiftlint', {
+\   'name': 'swiftlint',
+\   'executable': 'swiftlint',
+\   'command': g:ale#util#stdin_wrapper . ' .swift swiftlint',
+\   'callback': 'ale#handlers#HandleGCCFormat',
+\})

doc/ale.txt

@@ -92,6 +92,7 @@ The following languages and tools are supported.
 * SASS: 'sasslint', 'stylelint'
 * SCSS: 'sasslint', 'scsslint', 'stylelint'
 * Scala: 'scalac'
+* Swift: 'swiftlint'
 * TypeScript: 'tslint', 'typecheck'
 * Verilog: 'iverilog', 'verilator'
 * Vim: 'vint'