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" Author: w0rp <devw0rp@gmail.com>
" Description: Contains miscellaneous functions
function! s:FindWrapperScript() abort
for l:parent in split(&runtimepath, ',')
" Expand the path to deal with ~ issues.
let l:path = expand(l:parent . '/' . 'stdin-wrapper')
if filereadable(l:path)
if has('win32')
return l:path . '.bat'
endif
return l:path
endif
endfor
endfunction
let g:ale#util#stdin_wrapper = s:FindWrapperScript()
" A null file for sending output to nothing.
let g:ale#util#nul_file = '/dev/null'
if has('win32')
let g:ale#util#nul_file = 'nul'
endif
" Return the number of lines for a given buffer.
function! ale#util#GetLineCount(buffer) abort
return len(getbufline(a:buffer, 1, '$'))
endfunction
" Given a buffer and a filename, find the nearest file by searching upwards
" through the paths relative to the given buffer.
function! ale#util#FindNearestFile(buffer, filename) abort
let l:buffer_filename = fnamemodify(bufname(a:buffer), ':p')
let l:relative_path = findfile(a:filename, l:buffer_filename . ';')
if !empty(l:relative_path)
return fnamemodify(l:relative_path, ':p')
endif
return ''
endfunction
" Given a buffer and a directory name, find the nearest directory by searching upwards
" through the paths relative to the given buffer.
function! ale#util#FindNearestDirectory(buffer, directory_name) abort
let l:buffer_filename = fnamemodify(bufname(a:buffer), ':p')
let l:relative_path = finddir(a:directory_name, l:buffer_filename . ';')
if !empty(l:relative_path)
return fnamemodify(l:relative_path, ':p')
endif
return ''
endfunction
" Given a buffer, a string to search for, an a global fallback for when
" the search fails, look for a file in parent paths, and if that fails,
" use the global fallback path instead.
function! ale#util#ResolveLocalPath(buffer, search_string, global_fallback) abort
" Search for a locally installed file first.
let l:path = ale#util#FindNearestFile(a:buffer, a:search_string)
" If the serach fails, try the global executable instead.
if empty(l:path)
let l:path = a:global_fallback
endif
return l:path
endfunction
function! ale#util#GetFunction(string_or_ref) abort
if type(a:string_or_ref) == type('')
return function(a:string_or_ref)
endif
return a:string_or_ref
endfunction
function! ale#util#LocItemCompare(left, right) abort
if a:left['lnum'] < a:right['lnum']
return -1
endif
if a:left['lnum'] > a:right['lnum']
return 1
endif
if a:left['col'] < a:right['col']
return -1
endif
if a:left['col'] > a:right['col']
return 1
endif
return 0
endfunction
" This function will perform a binary search to find a message from the
" loclist to echo when the cursor moves.
function! ale#util#BinarySearch(loclist, line, column) abort
let l:min = 0
let l:max = len(a:loclist) - 1
let l:last_column_match = -1
while 1
if l:max < l:min
return l:last_column_match
endif
let l:mid = (l:min + l:max) / 2
let l:obj = a:loclist[l:mid]
" Binary search to get on the same line
if a:loclist[l:mid]['lnum'] < a:line
let l:min = l:mid + 1
elseif a:loclist[l:mid]['lnum'] > a:line
let l:max = l:mid - 1
else
let l:last_column_match = l:mid
" Binary search to get the same column, or near it
if a:loclist[l:mid]['col'] < a:column
let l:min = l:mid + 1
elseif a:loclist[l:mid]['col'] > a:column
let l:max = l:mid - 1
else
return l:mid
endif
endif
endwhile
endfunction
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