#392 - Detect and use compile_commands.json for cppcheck

2 files changed, 32 insertions, 2 deletions

diff --git a/ale_linters/c/cppcheck.vim b/ale_linters/c/cppcheck.vim
index 7da5b3ab..90805914 100644
--- a/ale_linters/c/cppcheck.vim
+++ b/ale_linters/c/cppcheck.vim
@@ -5,7 +5,22 @@
 let g:ale_c_cppcheck_options = get(g:, 'ale_c_cppcheck_options', '--enable=style')
 
 function! ale_linters#c#cppcheck#GetCommand(buffer) abort
-    return 'cppcheck -q --language=c '
+    " Search upwards from the file for compile_commands.json.
+    "
+    " If we find it, we'll `cd` to where the compile_commands.json file is,
+    " then use the file to set up import paths, etc.
+    let l:compile_commmands_path = ale#path#FindNearestFile(a:buffer, 'compile_commands.json')
+
+    let l:cd_command = !empty(l:compile_commmands_path)
+    \   ? ale#path#CdString(fnamemodify(l:compile_commmands_path, ':h'))
+    \   : ''
+    let l:compile_commands_option = !empty(l:compile_commmands_path)
+    \   ? '--project=compile_commands.json '
+    \   : ''
+
+    return l:cd_command
+    \   . 'cppcheck -q --language=c '
+    \   . l:compile_commands_option
     \   . ale#Var(a:buffer, 'c_cppcheck_options')
     \   . ' %t'
 endfunction
diff --git a/ale_linters/cpp/cppcheck.vim b/ale_linters/cpp/cppcheck.vim
index 49cab0d9..2255f63f 100644
--- a/ale_linters/cpp/cppcheck.vim
+++ b/ale_linters/cpp/cppcheck.vim
@@ -5,7 +5,22 @@
 let g:ale_cpp_cppcheck_options = get(g:, 'ale_cpp_cppcheck_options', '--enable=style')
 
 function! ale_linters#cpp#cppcheck#GetCommand(buffer) abort
-    return 'cppcheck -q --language=c++ '
+    " Search upwards from the file for compile_commands.json.
+    "
+    " If we find it, we'll `cd` to where the compile_commands.json file is,
+    " then use the file to set up import paths, etc.
+    let l:compile_commmands_path = ale#path#FindNearestFile(a:buffer, 'compile_commands.json')
+
+    let l:cd_command = !empty(l:compile_commmands_path)
+    \   ? ale#path#CdString(fnamemodify(l:compile_commmands_path, ':h'))
+    \   : ''
+    let l:compile_commands_option = !empty(l:compile_commmands_path)
+    \   ? '--project=compile_commands.json '
+    \   : ''
+
+    return l:cd_command
+    \   . 'cppcheck -q --language=c++ '
+    \   . l:compile_commands_option
     \   . ale#Var(a:buffer, 'cpp_cppcheck_options')
     \   . ' %t'
 endfunction