Add 'prettier' fixer support to TypeScript, CSS, SCSS and JSON (#910)

* Add prettier fixer support for typescript

* Add prettier fixer support for css and scss

* Add prettier fixer support for json

* Use getbufvar() to get &filetype

5 files changed, 46 insertions, 4 deletions

diff --git a/doc/ale-css.txt b/doc/ale-css.txt
index b1ab8eb8..979be881 100644
--- a/doc/ale-css.txt
+++ b/doc/ale-css.txt
@@ -30,4 +30,10 @@ g:ale_css_stylelint_use_global                 *g:ale_css_stylelint_use_global*
 
 
 ===============================================================================
+prettier                                                     *ale-css-prettier*
+
+See |ale-javascript-prettier| for information about the available options.
+
+
+===============================================================================
   vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:
diff --git a/doc/ale-json.txt b/doc/ale-json.txt
new file mode 100644
index 00000000..1d052d55
--- /dev/null
+++ b/doc/ale-json.txt
@@ -0,0 +1,18 @@
+===============================================================================
+ALE JSON Integration                                         *ale-json-options*
+
+
+===============================================================================
+jsonlint                                                    *ale-json-jsonlint*
+
+There are no options available.
+
+
+===============================================================================
+prettier                                                    *ale-json-prettier*
+
+See |ale-javascript-prettier| for information about the available options.
+
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:
diff --git a/doc/ale-scss.txt b/doc/ale-scss.txt
index c7b79195..e0b0a11d 100644
--- a/doc/ale-scss.txt
+++ b/doc/ale-scss.txt
@@ -22,4 +22,10 @@ g:ale_scss_stylelint_use_global               *g:ale_scss_stylelint_use_global*
 
 
 ===============================================================================
+prettier                                                    *ale-scss-prettier*
+
+See |ale-javascript-prettier| for information about the available options.
+
+
+===============================================================================
   vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:
diff --git a/doc/ale-typescript.txt b/doc/ale-typescript.txt
index 949b80de..887766fe 100644
--- a/doc/ale-typescript.txt
+++ b/doc/ale-typescript.txt
@@ -94,4 +94,10 @@ g:ale_typescript_tsserver_use_global     *g:ale_typescript_tsserver_use_global*
 
 
 ===============================================================================
+prettier                                              *ale-typescript-prettier*
+
+See |ale-javascript-prettier| for information about the available options.
+
+
+===============================================================================
   vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:
diff --git a/doc/ale.txt b/doc/ale.txt
index 899e8c80..3c02af37 100644
--- a/doc/ale.txt
+++ b/doc/ale.txt
@@ -33,6 +33,7 @@ CONTENTS                                                         *ale-contents*
       gcc.................................|ale-cpp-gcc|
       clang-format........................|ale-cpp-clangformat|
     css...................................|ale-css-options|
+      prettier............................|ale-css-prettier|
       stylelint...........................|ale-css-stylelint|
     cmake.................................|ale-cmake-options|
       cmakelint...........................|ale-cmake-cmakelint|
@@ -71,6 +72,9 @@ CONTENTS                                                         *ale-contents*
       prettier-standard...................|ale-javascript-prettier-standard|
       standard............................|ale-javascript-standard|
       xo..................................|ale-javascript-xo|
+    json..................................|ale-json-options|
+      jsonlint............................|ale-json-jsonlint|
+      prettier............................|ale-json-prettier|
     kotlin................................|ale-kotlin-options|
       kotlinc.............................|ale-kotlin-kotlinc|
     lua...................................|ale-lua-options|
@@ -117,6 +121,7 @@ CONTENTS                                                         *ale-contents*
     scala.................................|ale-scala-options|
       scalastyle..........................|ale-scala-scalastyle|
     scss..................................|ale-scss-options|
+      prettier............................|ale-scss-prettier|
       stylelint...........................|ale-scss-stylelint|
     sh....................................|ale-sh-options|
       shell...............................|ale-sh-shell|
@@ -136,6 +141,7 @@ CONTENTS                                                         *ale-contents*
       thrift..............................|ale-thrift-thrift|
     typescript............................|ale-typescript-options|
       eslint..............................|ale-typescript-eslint|
+      prettier............................|ale-typescript-prettier|
       tslint..............................|ale-typescript-tslint|
       tsserver............................|ale-typescript-tsserver|
     verilog/systemverilog.................|ale-verilog-options|
@@ -200,7 +206,7 @@ Notes:
 * CMake: `cmakelint`
 * CoffeeScript: `coffee`, `coffeelint`
 * Crystal: `crystal`!!
-* CSS: `csslint`, `stylelint`
+* CSS: `csslint`, `stylelint`, `prettier`
 * Cython (pyrex filetype): `cython`
 * D: `dmd`
 * Dart: `dartanalyzer`
@@ -220,7 +226,7 @@ Notes:
 * Idris: `idris`
 * Java: `checkstyle`, `javac`
 * JavaScript: `eslint`, `jscs`, `jshint`, `flow`, `prettier`, `prettier-eslint` >= 4.2.0, `prettier-standard`, `standard`, `xo`
-* JSON: `jsonlint`
+* JSON: `jsonlint`, `prettier`
 * Kotlin: `kotlinc`, `ktlint`
 * LaTeX (tex): `chktex`, `lacheck`, `proselint`
 * Lua: `luacheck`
@@ -245,7 +251,7 @@ Notes:
 * Ruby: `brakeman`, `rails_best_practices`!!, `reek`, `rubocop`, `ruby`
 * Rust: `cargo`!!, `rls`, `rustc` (see |ale-integration-rust|)
 * SASS: `sass-lint`, `stylelint`
-* SCSS: `sass-lint`, `scss-lint`, `stylelint`
+* SCSS: `sass-lint`, `scss-lint`, `stylelint`, `prettier`
 * Scala: `scalac`, `scalastyle`
 * Slim: `slim-lint`
 * SML: `smlnj`
@@ -256,7 +262,7 @@ Notes:
 * Texinfo: `proselint`
 * Text^: `proselint`, `vale`
 * Thrift: `thrift`
-* TypeScript: `eslint`, `tslint`, `tsserver`, `typecheck`
+* TypeScript: `eslint`, `tslint`, `tsserver`, `typecheck`, `prettier`
 * Verilog: `iverilog`, `verilator`
 * Vim: `vint`
 * Vim help^: `proselint`