Add clazy as cpp linter

ale_linters/cpp/clangtidy.vim

@@ -10,27 +10,9 @@ call ale#Set('cpp_clangtidy_checks', ['*'])
 call ale#Set('cpp_clangtidy_options', '')
 call ale#Set('c_build_dir', '')
 
-function! s:GetBuildDirectory(buffer) abort
-    " Don't include build directory for header files, as compile_commands.json
-    " files don't consider headers to be translation units, and provide no
-    " commands for compiling header files.
-    if expand('#' . a:buffer) =~# '\v\.(h|hpp)$'
-        return ''
-    endif
-
-    let l:build_dir = ale#Var(a:buffer, 'c_build_dir')
-
-    " c_build_dir has the priority if defined
-    if !empty(l:build_dir)
-        return l:build_dir
-    endif
-
-    return ale#path#Dirname(ale#c#FindCompileCommands(a:buffer))
-endfunction
-
 function! ale_linters#cpp#clangtidy#GetCommand(buffer) abort
     let l:checks = join(ale#Var(a:buffer, 'cpp_clangtidy_checks'), ',')
-    let l:build_dir = s:GetBuildDirectory(a:buffer)
+    let l:build_dir = ale#c#GetBuildDirectory(a:buffer)
 
     " Get the extra options if we couldn't find a build directory.
     let l:options = empty(l:build_dir)

ale_linters/cpp/clazy.vim

@@ -0,0 +1,32 @@
+" Description: clazy linter for cpp files (clang-based and Qt-oriented)
+
+call ale#Set('cpp_clazy_executable', 'clazy-standalone')
+" Set this option to check the checks clazy will apply.
+call ale#Set('cpp_clazy_checks', ['level1'])
+" Set this option to manually set some options for clazy.
+" This will disable compile_commands.json detection.
+call ale#Set('cpp_clazy_options', '')
+call ale#Set('c_build_dir', '')
+
+function! ale_linters#cpp#clazy#GetCommand(buffer) abort
+    let l:checks = join(ale#Var(a:buffer, 'cpp_clazy_checks'), ',')
+    let l:build_dir = ale#c#GetBuildDirectory(a:buffer)
+
+    " Get the extra options if we couldn't find a build directory.
+    let l:options = ale#Var(a:buffer, 'cpp_clazy_options')
+
+    return '%e'
+    \   . (!empty(l:checks) ? ' -checks=' . ale#Escape(l:checks) : '')
+    \   . (!empty(l:build_dir) ? ' -p ' . ale#Escape(l:build_dir) : '')
+    \   . (!empty(l:options) ? ' ' . l:options : '')
+    \   . ' %s'
+endfunction
+
+call ale#linter#Define('cpp', {
+\   'name': 'clazy',
+\   'output_stream': 'stderr',
+\   'executable_callback': ale#VarFunc('cpp_clazy_executable'),
+\   'command_callback': 'ale_linters#cpp#clazy#GetCommand',
+\   'callback': 'ale#handlers#gcc#HandleGCCFormat',
+\   'lint_file': 1,
+\})