if has_key(g:polyglot_is_disabled, 'crystal')
finish
endif
let s:V = vital#crystal#new()
let s:P = s:V.import('Process')
let s:C = s:V.import('ColorEcho')
let s:IS_WINDOWS = has('win32')
if exists('*json_decode')
function! s:decode_json(text) abort
return json_decode(a:text)
endfunction
else
let s:J = s:V.import('Web.JSON')
function! s:decode_json(text) abort
return s:J.decode(a:text)
endfunction
endif
function! s:echo_error(msg, ...) abort
echohl ErrorMsg
if a:0 == 0
echomsg a:msg
else
echomsg call('printf', [a:msg] + a:000)
endif
echohl None
endfunction
function! s:run_cmd(cmd) abort
if !executable(g:crystal_compiler_command)
throw "vim-crystal: Error: '" . g:crystal_compiler_command . "' command is not found."
endif
return s:P.system(a:cmd)
endfunction
function! s:find_root_by(search_dir, d) abort
let found_dir = finddir(a:search_dir, a:d . ';')
if found_dir ==# ''
return ''
endif
" Note: ':h:h' for {root}/{search_dir}/ -> {root}/{search_dir} -> {root}
return fnamemodify(found_dir, ':p:h:h')
endfunction
" Search the root directory containing a 'spec/' and a 'src/' directories.
"
" Searching for the 'spec/' directory is not enough: for example the crystal
" compiler has a 'cr_sources/src/spec/' directory that would otherwise give the root
" directory as 'cr_source/src/' instead of 'cr_sources/'.
function! s:find_root_by_spec_and_src(d) abort
" Search for 'spec/'
let root = s:find_root_by('spec', a:d)
" Check that 'src/' is also there
if root !=# '' && isdirectory(root . '/src')
return root
endif
" Search for 'src/'
let root = s:find_root_by('src', a:d)
" Check that 'spec/' is also there
if root !=# '' && isdirectory(root . '/spec')
return root
endif
" Cannot find a directory containing both 'src/' and 'spec/'
return ''
endfunction
function! crystal_lang#entrypoint_for(file_path) abort
let parent_dir = fnamemodify(a:file_path, ':p:h')
let root_dir = s:find_root_by_spec_and_src(parent_dir)
if root_dir ==# ''
" No spec directory found. No need to make temporary file
return a:file_path
endif
let required_spec_path = get(b:, 'crystal_required_spec_path', get(g:, 'crystal_required_spec_path', ''))
if required_spec_path !=# ''
let require_spec_str = './' . required_spec_path
else
let require_spec_str = './spec/**'
endif
let temp_name = root_dir . '/__vim-crystal-temporary-entrypoint-' . fnamemodify(a:file_path, ':t')
let contents = [
\ 'require "spec"',
\ 'require "' . require_spec_str . '"',
\ printf('require "./%s"', fnamemodify(a:file_path, ':p')[strlen(root_dir)+1 : ])
\ ]
let result = writefile(contents, temp_name)
if result == -1
" Note: When writefile() failed
return a:file_path
endif
return temp_name
endfunction
function! crystal_lang#tool(name, file, pos, option_str) abort
let entrypoint = crystal_lang#entrypoint_for(a:file)
let cmd = printf(
\ '%s tool %s --no-color %s --cursor %s:%d:%d %s',
\ g:crystal_compiler_command,
\ a:name,
\ a:option_str,
\ a:file,
\ a:pos[1],
\ a:pos[2],
\ entrypoint
\ )
try
let output = s:run_cmd(cmd)
return {'failed': s:P.get_last_status(), 'output': output}
finally
" Note:
" If the entry point is temporary file, delete it finally.
if a:file !=# entrypoint
call delete(entrypoint)
endif
endtry
endfunction
" `pos` is assumed a returned value from getpos()
function! crystal_lang#impl(file, pos, option_str) abort
return crystal_lang#tool('implementations', a:file, a:pos, a:option_str)
endfunction
function! s:jump_to_impl(impl) abort
execute 'edit' a:impl.filename
call cursor(a:impl.line, a:impl.column)
endfunction
function! crystal_lang#jump_to_definition(file, pos) abort
echo 'analyzing definitions under cursor...'
let cmd_result = crystal_lang#impl(a:file, a:pos, '--format json')
if cmd_result.failed
return s:echo_error(cmd_result.output)
endif
let impl = s:decode_json(cmd_result.output)
if impl.status !=# 'ok'
return s:echo_error(impl.message)
endif
if len(impl.implementations) == 1
call s:jump_to_impl(impl.implementations[0])
return
endif
let message = "Multiple definitions detected. Choose a number\n\n"
for idx in range(len(impl.implementations))
let i = impl.implementations[idx]
let message .= printf("[%d] %s:%d:%d\n", idx, i.filename, i.line, i.column)
endfor
let message .= "\n"
let idx = str2nr(input(message, "\n> "))
call s:jump_to_impl(impl.implementations[idx])
endfunction
function! crystal_lang#context(file, pos, option_str) abort
return crystal_lang#tool('context', a:file, a:pos, a:option_str)
endfunction
function! crystal_lang#type_hierarchy(file, option_str) abort
let cmd = printf(
\ '%s tool hierarchy --no-color %s %s',
\ g:crystal_compiler_command,
\ a:option_str,
\ a:file
\ )
return s:run_cmd(cmd)
endfunction
function! s:find_completion_start() abort
let c = col('.')
if c <= 1
return -1
endif
let line = getline('.')[:c-2]
return match(line, '\w\+$')
endfunction
function! crystal_lang#complete(findstart, base) abort
if a:findstart
return s:find_completion_start()
endif
let cmd_result = crystal_lang#context(expand('%'), getpos('.'), '--format json')
if cmd_result.failed
return
endif
let contexts = s:decode_json(cmd_result.output)
if contexts.status !=# 'ok'
return
endif
let candidates = []
for c in contexts.contexts
for [name, desc] in items(c)
let candidates += [{
\ 'word': name,
\ 'menu': ': ' . desc . ' [var]',
\ }]
endfor
endfor
return candidates
endfunction
function! crystal_lang#get_spec_switched_path(absolute_path) abort
let base = fnamemodify(a:absolute_path, ':t:r')
" TODO: Make cleverer
if base =~# '_spec$'
let parent = fnamemodify(substitute(a:absolute_path, '/spec/', '/src/', ''), ':h')
return parent . '/' . matchstr(base, '.\+\ze_spec$') . '.cr'
else
let parent = fnamemodify(substitute(a:absolute_path, '/src/', '/spec/', ''), ':h')
return parent . '/' . base . '_spec.cr'
endif
endfunction
function! crystal_lang#switch_spec_file(...) abort
let path = a:0 == 0 ? expand('%:p') : fnamemodify(a:1, ':p')
if path !~# '.cr$'
return s:echo_error('Not crystal source file: ' . path)
endif
execute 'edit!' crystal_lang#get_spec_switched_path(path)
endfunction
function! s:run_spec(root, path, ...) abort
" Note:
" `crystal spec` can't understand absolute path.
let cmd = printf(
\ '%s spec %s%s',
\ g:crystal_compiler_command,
\ a:path,
\ a:0 == 0 ? '' : (':' . a:1)
\ )
let saved_cwd = getcwd()
let cd = haslocaldir() ? 'lcd' : 'cd'
try
execute cd a:root
call s:C.echo(s:run_cmd(cmd))
finally
execute cd saved_cwd
endtry
endfunction
function! crystal_lang#run_all_spec(...) abort
let path = a:0 == 0 ? expand('%:p:h') : a:1
let root_path = s:find_root_by_spec_and_src(path)
if root_path ==# ''
return s:echo_error("'spec' directory is not found")
endif
call s:run_spec(root_path, 'spec')
endfunction
function! crystal_lang#run_current_spec(...) abort
" /foo/bar/src/poyo.cr
let path = a:0 == 0 ? expand('%:p') : fnamemodify(a:1, ':p')
if path !~# '.cr$'
return s:echo_error('Not crystal source file: ' . path)
endif
" /foo/bar/src
let source_dir = fnamemodify(path, ':h')
" /foo/bar
let root_dir = s:find_root_by_spec_and_src(source_dir)
if root_dir ==# ''
return s:echo_error("Root directory with 'src/' and 'spec/' not found")
endif
" src
let rel_path = source_dir[strlen(root_dir)+1 : ]
if path =~# '_spec.cr$'
call s:run_spec(root_dir, path[strlen(root_dir)+1 : ], line('.'))
else
let spec_path = substitute(rel_path, '^src', 'spec', '') . '/' . fnamemodify(path, ':t:r') . '_spec.cr'
if !filereadable(root_dir . '/' . spec_path)
return s:echo_error('Error: Could not find a spec source corresponding to ' . path)
endif
call s:run_spec(root_dir, spec_path)
endif
endfunction
function! crystal_lang#format_string(code, ...) abort
if s:IS_WINDOWS
let redirect = '2> nul'
else
let redirect = '2>/dev/null'
endif
let cmd = printf(
\ '%s tool format --no-color %s - %s',
\ g:crystal_compiler_command,
\ get(a:, 1, ''),
\ redirect,
\ )
let output = s:P.system(cmd, a:code)
if s:P.get_last_status()
throw 'vim-crystal: Error on formatting with command: ' . cmd
endif
return output
endfunction
" crystal_lang#format(option_str [, on_save])
function! crystal_lang#format(option_str, ...) abort
let on_save = a:0 > 0 ? a:1 : 0
if !executable(g:crystal_compiler_command)
if on_save
" Finish command silently on save
return
else
throw 'vim-crystal: Command for formatting is not executable: ' . g:crystal_compiler_command
endif
endif
let before = join(getline(1, '$'), "\n")
try
let formatted = crystal_lang#format_string(before, a:option_str)
catch /^vim-crystal: /
echohl ErrorMsg
echomsg v:exception . ': Your code was not formatted. Exception was thrown at ' . v:throwpoint
echohl None
return
endtry
if !on_save
let after = substitute(formatted, '\n$', '', '')
if before ==# after
return
endif
endif
let view_save = winsaveview()
let pos_save = getpos('.')
let lines = split(formatted, '\n')
silent! undojoin
if line('$') > len(lines)
execute len(lines) . ',$delete' '_'
endif
call setline(1, lines)
call winrestview(view_save)
call setpos('.', pos_save)
endfunction
function! crystal_lang#expand(file, pos, ...) abort
return crystal_lang#tool('expand', a:file, a:pos, get(a:, 1, ''))
endfunction
" vim: sw=2 sts=2 et:
