Add support for Fortran language server by @hansec

README.md

@@ -119,7 +119,7 @@ formatting.
 | Erb | [erb](https://apidock.com/ruby/ERB), [erubi](https://github.com/jeremyevans/erubi), [erubis](https://github.com/kwatch/erubis) |
 | Erlang | [erlc](http://erlang.org/doc/man/erlc.html), [SyntaxErl](https://github.com/ten0s/syntaxerl) |
 | Fish | fish [-n flag](https://linux.die.net/man/1/fish)
-| Fortran | [gcc](https://gcc.gnu.org/) |
+| Fortran | [gcc](https://gcc.gnu.org/), [language_server](https://github.com/hansec/fortran-language-server) |
 | Fountain | [proselint](http://proselint.com/) |
 | FusionScript | [fusion-lint](https://github.com/RyanSquared/fusionscript) |
 | Git Commit Messages | [gitlint](https://github.com/jorisroovers/gitlint) |

ale_linters/fortran/language_server.vim

@@ -0,0 +1,23 @@
+" Author: unpairedbracket ben.spiers22@gmail.com
+" Description: A language server for fortran
+
+call ale#Set('fortran_language_server_executable', 'fortls')
+call ale#Set('fortran_language_server_use_global', get(g:, 'ale_use_global_executables', 0))
+
+function! ale_linters#fortran#language_server#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'fortran_language_server_executable')
+endfunction
+
+function! ale_linters#fortran#language_server#GetProjectRoot(buffer) abort
+    let l:fortls_file = ale#path#FindNearestFile(a:buffer, '.fortls')
+
+    return !empty(l:fortls_file) ? fnamemodify(l:fortls_file, ':h') : ''
+endfunction
+
+call ale#linter#Define('fortran', {
+\   'name': 'language_server',
+\   'lsp': 'stdio',
+\   'executable_callback': 'ale_linters#fortran#language_server#GetExecutable',
+\   'command_callback': 'ale_linters#fortran#language_server#GetExecutable',
+\   'project_root_callback': 'ale_linters#fortran#language_server#GetProjectRoot',
+\})

doc/ale.txt

@@ -355,7 +355,7 @@ Notes:
 * Erb: `erb`, `erubi`, `erubis`
 * Erlang: `erlc`, `SyntaxErl`
 * Fish: `fish` (-n flag)
-* Fortran: `gcc`
+* Fortran: `gcc`, `language_server`
 * Fountain: `proselint`
 * FusionScript: `fusion-lint`
 * Git Commit Messages: `gitlint`