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" Author: gagbo <gagbobada@gmail.com>, w0rp <devw0rp@gmail.com>, roel0 <postelmansroel@gmail.com>
" Description: Functions for integrating with C-family linters.
call ale#Set('c_parse_makefile', 0)
let s:sep = has('win32') ? '\' : '/'
" Set just so tests can override it.
let g:__ale_c_project_filenames = ['.git/HEAD', 'configure', 'Makefile', 'CMakeLists.txt']
function! ale#c#FindProjectRoot(buffer) abort
for l:project_filename in g:__ale_c_project_filenames
let l:full_path = ale#path#FindNearestFile(a:buffer, l:project_filename)
if !empty(l:full_path)
let l:path = fnamemodify(l:full_path, ':h')
" Correct .git path detection.
if fnamemodify(l:path, ':t') is# '.git'
let l:path = fnamemodify(l:path, ':h')
endif
return l:path
endif
endfor
return ''
endfunction
function! ale#c#ParseCFlagsToList(path_prefix, cflags) abort
let l:cflags_list = []
let l:previous_options = []
for l:option in a:cflags
call add(l:previous_options, l:option)
" Check if cflag contained a '-' and should not have been splitted
let l:option_list = split(l:option, '\zs')
if l:option_list[-1] isnot# ' '
continue
endif
let l:option = join(l:previous_options, '-')
let l:previous_options = []
let l:option = '-' . substitute(l:option, '^\s*\(.\{-}\)\s*$', '\1', '')
" Fix relative paths if needed
if stridx(l:option, '-I') >= 0 &&
\ stridx(l:option, '-I' . s:sep) < 0
let l:rel_path = join(split(l:option, '\zs')[2:], '')
let l:rel_path = substitute(l:rel_path, '"', '', 'g')
let l:rel_path = substitute(l:rel_path, '''', '', 'g')
let l:option = ale#Escape('-I' . a:path_prefix .
\ s:sep . l:rel_path)
endif
" Parse the cflag
if stridx(l:option, '-I') >= 0 ||
\ stridx(l:option, '-D') >= 0
if index(l:cflags_list, l:option) < 0
call add(l:cflags_list, l:option)
endif
endif
endfor
return l:cflags_list
endfunction
function! ale#c#ParseCFlags(buffer, stdout_make) abort
if !g:ale_c_parse_makefile
return []
endif
let l:buffer_filename = expand('#' . a:buffer . ':t')
let l:cflags = []
for l:lines in split(a:stdout_make, '\\n')
if stridx(l:lines, l:buffer_filename) >= 0
let l:cflags = split(l:lines, '-')
break
endif
endfor
let l:makefile_path = ale#path#FindNearestFile(a:buffer, 'Makefile')
return ale#c#ParseCFlagsToList(fnamemodify(l:makefile_path, ':p:h'), l:cflags)
endfunction
function! ale#c#GetCFlags(buffer, output) abort
let l:cflags = ' '
if g:ale_c_parse_makefile && !empty(a:output)
let l:cflags = join(ale#c#ParseCFlags(a:buffer, join(a:output, '\n')), ' ') . ' '
endif
if l:cflags is# ' '
let l:cflags = ale#c#IncludeOptions(ale#c#FindLocalHeaderPaths(a:buffer))
endif
return l:cflags
endfunction
function! ale#c#GetMakeCommand(buffer) abort
if g:ale_c_parse_makefile
let l:makefile_path = ale#path#FindNearestFile(a:buffer, 'Makefile')
if !empty(l:makefile_path)
return 'cd '. fnamemodify(l:makefile_path, ':p:h') . ' && make -n'
endif
endif
return ''
endfunction
" Given a buffer number, search for a project root, and output a List
" of directories to include based on some heuristics.
"
" For projects with headers in the project root, the project root will
" be returned.
"
" For projects with an 'include' directory, that directory will be returned.
function! ale#c#FindLocalHeaderPaths(buffer) abort
let l:project_root = ale#c#FindProjectRoot(a:buffer)
if empty(l:project_root)
return []
endif
" See if we can find .h files directory in the project root.
" If we can, that's our include directory.
if !empty(globpath(l:project_root, '*.h', 0))
return [l:project_root]
endif
" Look for .hpp files too.
if !empty(globpath(l:project_root, '*.hpp', 0))
return [l:project_root]
endif
" If we find an 'include' directory in the project root, then use that.
if isdirectory(l:project_root . '/include')
return [ale#path#Simplify(l:project_root . s:sep . 'include')]
endif
return []
endfunction
" Given a List of include paths, create a string containing the -I include
" options for those paths, with the paths escaped for use in the shell.
function! ale#c#IncludeOptions(include_paths) abort
let l:option_list = []
for l:path in a:include_paths
call add(l:option_list, '-I' . ale#Escape(l:path))
endfor
if empty(l:option_list)
return ''
endif
return ' ' . join(l:option_list) . ' '
endfunction
let g:ale_c_build_dir_names = get(g:, 'ale_c_build_dir_names', [
\ 'build',
\ 'bin',
\])
" Given a buffer number, find the build subdirectory with compile commands
" The subdirectory is returned without the trailing /
function! ale#c#FindCompileCommands(buffer) abort
for l:path in ale#path#Upwards(expand('#' . a:buffer . ':p:h'))
for l:dirname in ale#Var(a:buffer, 'c_build_dir_names')
let l:c_build_dir = l:path . s:sep . l:dirname
if filereadable(l:c_build_dir . '/compile_commands.json')
return l:c_build_dir
endif
endfor
endfor
return ''
endfunction
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