Use g:ale_linters for turning gometalinter on, and update documentation as appropriate

ale_linters/go/gometalinter.vim

@@ -1,20 +1,14 @@
 " Author: Ben Reedy <https://github.com/breed808>
 " Description: Adds support for the gometalinter suite for Go files
 
-" Disable gometalinter by default
-if !exists('g:ale_go_gometalinter_enabled')
-    let g:ale_go_gometalinter_enabled = 0
-endif
-
 if !exists('g:ale_go_gometalinter_options')
     let g:ale_go_gometalinter_options = ''
 endif
 
 function! ale_linters#go#gometalinter#GetCommand(buffer) abort
-    if g:ale_go_gometalinter_enabled == 1
-        return 'gometalinter ' . g:ale_go_gometalinter_options . ' ' . fnameescape(fnamemodify(bufname(a:buffer), ':p:h'))
-    endif
-    return ''
+    return 'gometalinter '
+    \   . g:ale_go_gometalinter_options
+    \   . ' ' . fnameescape(fnamemodify(bufname(a:buffer), ':p:h'))
 endfunction
 
 function! ale_linters#go#gometalinter#Handler(buffer, lines) abort
@@ -49,6 +43,7 @@ function! ale_linters#go#gometalinter#Handler(buffer, lines) abort
         \   'nr': -1,
         \})
     endfor
+
     return l:output
 endfunction
 

autoload/ale/linter.vim

@@ -22,6 +22,7 @@ let s:default_ale_linter_aliases = {
 " Only cargo is enabled for Rust by default.
 let s:default_ale_linters = {
 \   'csh': ['shell'],
+\   'go': ['go build', 'gofmt', 'golint', 'gosimple', 'go vet', 'staticcheck'],
 \   'help': [],
 \   'rust': ['cargo'],
 \   'text': [],

doc/ale-go.txt

@@ -2,6 +2,18 @@
 ALE Go Integration                                            *ale-go-options*
 
 
+-------------------------------------------------------------------------------
+Integration Information
+
+The `gometalinter` linter is disabled by default, and all other Go linters
+supported by ALE are enabled by default. To enable `gometalinter`, update
+|g:ale_linters| as appropriate:
+
+>
+  " Enable all of the linters you want for Go.
+  let g:ale_linters = {'go': ['gometalinter', 'gofmt']}
+<
+
 -------------------------------------------------------------------------------
 gometalinter                                             *ale-go-gometalinter*
 

doc/ale.txt

@@ -31,6 +31,8 @@ CONTENTS                                                         *ale-contents*
       erlc................................|ale-erlang-erlc|
     fortran...............................|ale-fortran-options|
       gcc.................................|ale-fortran-gcc|
+    go....................................|ale-go-options|
+      gometalinter........................|ale-go-gometalinter|
     handlebars............................|ale-handlebars-options|
       ember-template-lint.................|ale-handlebars-embertemplatelint|
     html..................................|ale-html-options|
@@ -123,7 +125,7 @@ The following languages and tools are supported.
 * Elm: 'elm-make'
 * Erlang: 'erlc'
 * Fortran: 'gcc'
-* Go: 'gofmt -e', 'go vet', 'golint', 'go build', 'gosimple', 'staticcheck'
+* Go: 'gofmt', 'go vet', 'golint', 'go build', 'gosimple', 'staticcheck'
 * Haml: 'hamllint'
 * Handlebars: 'ember-template-lint'
 * Haskell: 'ghc', 'hlint'