+" Author: Niraj Thapaliya - https://github.com/nthapaliya
+" Description: Lints fish files using fish -n
+
+function! ale_linters#fish#fish#Handle(buffer, lines) abort
+ " Matches patterns such as:
+ "
+ " home/.config/fish/functions/foo.fish (line 1): Missing end to balance this function definition
+ " function foo
+ " ^
+ "
+ " OR, patterns such as:
+ "
+ " Unsupported use of '||'. In fish, please use 'COMMAND; or COMMAND'.
+ " /tmp/vLz620o/258/test.fish (line 2): if set -q SSH_CLIENT || set -q SSH_TTY
+ " ^
+ "
+ " fish -n can return errors in either format.
+ let l:pattern = '^\(.* (line \(\d\+\)): \)\(.*\)$'
+ let l:column_pattern = '^ *\^'
+ let l:output = []
+ let l:column_offset = 0
+ let l:last_line_with_message = ''
+
+ for l:line in a:lines
+ " Look for error lines first.
+ let l:match = matchlist(l:line, l:pattern)
+
+ if !empty(l:match)
+ if !empty(l:last_line_with_message)
+ let l:text = l:last_line_with_message
+ else
+ let l:text = l:match[3]
+ endif
+
+ let l:column_offset = len(l:match[1])
+
+ let l:last_line_with_message = ''
+ call add(l:output, {
+ \ 'col': 0,
+ \ 'lnum': str2nr(l:match[2]),
+ \ 'text': l:text,
+ \})
+ else
+ " Look for column markers like ' ^' second.
+ " The column index will be set according to how long the line is.
+ let l:column_match = matchstr(l:line, l:column_pattern)
+
+ if !empty(l:column_match) && !empty(l:output)
+ let l:output[-1].col = len(l:column_match) - l:column_offset
+ let l:last_line_with_message = ''
+ else
+ let l:last_line_with_message = l:line
+ let l:column_offset = 0
+ endif
+ endif
+ endfor
+
+ return l:output
+endfunction
+
+call ale#linter#Define('fish', {
+\ 'name': 'fish',
+\ 'output_stream': 'stderr',
+\ 'executable': 'fish',
+\ 'command': 'fish -n %t',
+\ 'callback': 'ale_linters#fish#fish#Handle',
+\})