Merge commit '76265755a1add77121c8f9dabb3e9bb70fe9a972' as '.vim/bundle/ale'

[etc/vim.git] / .vim / bundle / ale / ale_linters / erlang / erlc.vim

diff --git a/.vim/bundle/ale/ale_linters/erlang/erlc.vim b/.vim/bundle/ale/ale_linters/erlang/erlc.vim
new file mode 100644 (file)
index 0000000..0c67a73
--- /dev/null
+++ b/.vim/bundle/ale/ale_linters/erlang/erlc.vim
@@ -0,0 +1,104 @@
+" Author: Magnus Ottenklinger - https://github.com/evnu
+
+let g:ale_erlang_erlc_executable = get(g:, 'ale_erlang_erlc_executable', 'erlc')
+let g:ale_erlang_erlc_options = get(g:, 'ale_erlang_erlc_options', '')
+
+function! ale_linters#erlang#erlc#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'erlang_erlc_executable')
+endfunction
+
+function! ale_linters#erlang#erlc#GetCommand(buffer) abort
+    let l:output_file = ale#util#Tempname()
+    call ale#command#ManageFile(a:buffer, l:output_file)
+
+    let l:command = ale#Escape(ale_linters#erlang#erlc#GetExecutable(a:buffer))
+    \             . ' -o ' . ale#Escape(l:output_file)
+    \             . ' ' . ale#Var(a:buffer, 'erlang_erlc_options')
+    \             . ' %t'
+
+    return l:command
+endfunction
+
+function! ale_linters#erlang#erlc#Handle(buffer, lines) abort
+    " Matches patterns like the following:
+    "
+    " error.erl:4: variable 'B' is unbound
+    " error.erl:3: Warning: function main/0 is unused
+    " error.erl:4: Warning: variable 'A' is unused
+    let l:pattern = '\v^([a-zA-Z]?:?[^:]+):(\d+):(\d+:)? (Warning: )?(.+)$'
+
+    " parse_transforms are a special case. The error message does not indicate a location:
+    " error.erl: undefined parse transform 'some_parse_transform'
+    let l:pattern_parse_transform = '\v(undefined parse transform .*)$'
+    let l:output = []
+
+    let l:pattern_no_module_definition = '\v(no module definition)$'
+    let l:pattern_unused = '\v(.* is unused)$'
+
+    let l:is_hrl = fnamemodify(bufname(a:buffer), ':e') is# 'hrl'
+
+    for l:line in a:lines
+        let l:match = matchlist(l:line, l:pattern)
+
+        " Determine if the output indicates an error. We distinguish between two cases:
+        "
+        " 1) normal errors match l:pattern
+        " 2) parse_transform errors match l:pattern_parse_transform
+        "
+        " If none of the patterns above match, the line can be ignored
+        if len(l:match) == 0 " not a 'normal' warning or error
+            let l:match_parse_transform = matchlist(l:line, l:pattern_parse_transform)
+
+            if len(l:match_parse_transform) == 0 " also not a parse_transform error
+                continue
+            endif
+
+            call add(l:output, {
+            \   'bufnr': a:buffer,
+            \   'lnum': 0,
+            \   'col': 0,
+            \   'type': 'E',
+            \   'text': l:match_parse_transform[0],
+            \})
+
+            continue
+        endif
+
+        let l:line = l:match[2]
+        let l:warning_or_text = l:match[4]
+        let l:text = l:match[5]
+
+        " If this file is a header .hrl, ignore the following expected messages:
+        " - 'no module definition'
+        " - 'X is unused'
+        if l:is_hrl && (
+        \   match(l:text, l:pattern_no_module_definition) != -1
+        \   || match(l:text, l:pattern_unused) != -1
+        \)
+            continue
+        endif
+
+        if !empty(l:warning_or_text)
+            let l:type = 'W'
+        else
+            let l:type = 'E'
+        endif
+
+        call add(l:output, {
+        \   'bufnr': a:buffer,
+        \   'lnum': l:line,
+        \   'col': 0,
+        \   'type': l:type,
+        \   'text': l:text,
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('erlang', {
+\   'name': 'erlc',
+\   'executable': function('ale_linters#erlang#erlc#GetExecutable'),
+\   'command': function('ale_linters#erlang#erlc#GetCommand'),
+\   'callback': 'ale_linters#erlang#erlc#Handle',
+\})