Add linter for ispc

ale_linters/ispc/ispc.vim

@@ -0,0 +1,68 @@
+" Author: Martino Pilia <martino.pilia@gmail.com>
+" Description: Lint ispc files with the Intel(R) SPMD Program Compiler
+
+call ale#Set('ispc_ispc_executable', 'ispc')
+call ale#Set('ispc_ispc_options', '')
+
+" ISPC has no equivalent of gcc's -iquote argument, so use a -I for headers
+" in the same directory. Not perfect, since now local headers are accepted
+" by #include<> while they should not, but better than nothing.
+function! ale_linters#ispc#ispc#GetCommand(buffer) abort
+    return '%e '
+    \   . '-I ' . ale#Escape(fnamemodify(bufname(a:buffer), ':p:h'))
+    \   . ale#Pad(ale#c#IncludeOptions(ale#c#FindLocalHeaderPaths(a:buffer)))
+    \   . ale#Pad(ale#Var(a:buffer, 'ispc_ispc_options')) . ' -'
+endfunction
+
+" Note that we ignore the two warnings in the beginning of the compiler output
+" ('no output file specified' and 'no --target specified'), since they have
+" nothing to do with linting.
+function! ale_linters#ispc#ispc#Handle(buffer, lines) abort
+    " Message format: <filename>:<lnum>:<col> <type>: <text>
+    " As far as I know, <type> can be any of:
+    "   'error', 'Error', 'fatal error', 'Warning', 'Performance Warning'
+    let l:re = '\v(.+):([0-9]+):([0-9]+):\s+([^:]+):\s+(.+)\s*'
+    let l:Trim = {s -> substitute(s, '^\s*\(.\{-}\)\s*$', '\1', '')}
+    let l:line_count = len(a:lines)
+    let l:output = []
+
+    for l:index in range(l:line_count)
+        let l:match = matchlist(a:lines[l:index], l:re)
+
+        if l:match != []
+            let l:text = l:Trim(l:match[5])
+
+            " The text may continue over multiple lines.
+            " Look for a full stop, question, or exclamation mark
+            " ending the text.
+            " Also, for some reason, 'file not found' messages are on
+            " one line but not terminated by punctuation.
+            while match(l:text, '[.?!]\s*$') == -1
+                    \ && match(l:text, 'file not found') == -1
+                    \ && l:index < l:line_count - 1
+                let l:index += 1
+                let l:text .= ' ' . l:Trim(a:lines[l:index])
+            endwhile
+
+            call add(l:output, {
+            \   'filename': fnamemodify(l:match[1], ':p'),
+            \   'bufnr': a:buffer,
+            \   'lnum': str2nr(l:match[2]),
+            \   'col': str2nr(l:match[3]),
+            \   'type': l:match[4] =~? 'error' ? 'E' : 'W',
+            \   'text': l:text,
+            \})
+            continue
+        endif
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('ispc', {
+\   'name': 'ispc',
+\   'output_stream': 'stderr',
+\   'executable_callback': ale#VarFunc('ispc_ispc_executable'),
+\   'command_callback': 'ale_linters#ispc#ispc#GetCommand',
+\   'callback': 'ale_linters#ispc#ispc#Handle',
+\})